The document discusses the relationship between agriculture and climate change. It notes that agriculture both contributes to climate change through greenhouse gas emissions and is impacted by climate change through changes in temperature, precipitation, and extreme weather. Agriculture accounts for 30% of global anthropogenic greenhouse gas emissions. However, agricultural practices can also help mitigate climate change by increasing carbon sequestration in soils through conservation tillage and agroforestry. Global mitigation potential from agriculture is estimated at 5.5-6.0 gigatons of carbon dioxide equivalent per year by 2030, with soil carbon sequestration accounting for 89% of potential. Climate-smart agriculture aims to increase productivity, resilience, and mitigate emissions while enhancing food security.
Climate change and Agriculture: Impact Aadaptation and MitigationPragyaNaithani
Climate change refers to a statistically significant variation in either the mean state of the climate or in its Variability, persisting for an extended period (typically decades or longer). For the past some decades, the gaseous composition of earth’s atmosphere is undergoing a significant change, largely through increased emissions from energy, industry and agriculture sectors; widespread deforestation as well as fast changes in land use and land management practices. These anthropogenic activities are resulting in an increased emission of radiatively active gases, viz. carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), popularly known as the ‘greenhouse gases’ (GHGs)
These GHGs trap the outgoing infrared radiations from the earth’s surface and thus raise the temperature of the atmosphere. The global mean annual temperature at the end of the 20th century, as a result of GHG accumulation in the atmosphere, has increased by 0.4–0.7 ºC above that recorded at the end of the 19th century. The past 50 years have shown an increasing trend in temperature @ 0.13 °C/decade, while the rise in temperature during the past one and half decades has been much higher. The Inter-Governmental Panel on Climate Change has projected the temperature increase to be between 1.1 °C and 6.4 °C by the end of the 21st Century (IPCC, 2007). The global warming is expected to lead to other regional and global changes in the climate-related parameters such as rainfall, soil moisture, and sea level. Snow cover is also reported to be gradually decreasing.
Therefore, concerted efforts are required for mitigation and adaptation to reduce the vulnerability of agriculture to the adverse impacts of climate change and making it more resilient.
The adaptive capacity of poor farmers is limited because of subsistence agriculture and low level of formal education. Therefore, simple, economically viable and culturally acceptable adaptation strategies have to be developed and implemented. Furthermore, the transfer of knowledge as well as access to social, economic, institutional, and technical resources need to be provided and integrated within the existing resources of farmers.
Along with changes in temperature, climate change will bring changes in global rainfall amounts and distribution patterns. And since temperature and water are two factors that have a large influence on the processes that take place in soils, climate change will therefore cause changes in the world’s soils
Climate change and Agriculture: Impact Aadaptation and MitigationPragyaNaithani
Climate change refers to a statistically significant variation in either the mean state of the climate or in its Variability, persisting for an extended period (typically decades or longer). For the past some decades, the gaseous composition of earth’s atmosphere is undergoing a significant change, largely through increased emissions from energy, industry and agriculture sectors; widespread deforestation as well as fast changes in land use and land management practices. These anthropogenic activities are resulting in an increased emission of radiatively active gases, viz. carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), popularly known as the ‘greenhouse gases’ (GHGs)
These GHGs trap the outgoing infrared radiations from the earth’s surface and thus raise the temperature of the atmosphere. The global mean annual temperature at the end of the 20th century, as a result of GHG accumulation in the atmosphere, has increased by 0.4–0.7 ºC above that recorded at the end of the 19th century. The past 50 years have shown an increasing trend in temperature @ 0.13 °C/decade, while the rise in temperature during the past one and half decades has been much higher. The Inter-Governmental Panel on Climate Change has projected the temperature increase to be between 1.1 °C and 6.4 °C by the end of the 21st Century (IPCC, 2007). The global warming is expected to lead to other regional and global changes in the climate-related parameters such as rainfall, soil moisture, and sea level. Snow cover is also reported to be gradually decreasing.
Therefore, concerted efforts are required for mitigation and adaptation to reduce the vulnerability of agriculture to the adverse impacts of climate change and making it more resilient.
The adaptive capacity of poor farmers is limited because of subsistence agriculture and low level of formal education. Therefore, simple, economically viable and culturally acceptable adaptation strategies have to be developed and implemented. Furthermore, the transfer of knowledge as well as access to social, economic, institutional, and technical resources need to be provided and integrated within the existing resources of farmers.
Along with changes in temperature, climate change will bring changes in global rainfall amounts and distribution patterns. And since temperature and water are two factors that have a large influence on the processes that take place in soils, climate change will therefore cause changes in the world’s soils
Climate change, its impact on agriculture and mitigation strategiesVasu Dev Meena
According to IPCC (2007) “Climate change refers to a statistically significant variation in either the mean state of the climate or in its Variability, persisting for an extended period (typically decades or longer)”.
Climate change has adverse impacts on agriculture, hydropower, forest management and biodiversity.
In the long run, the climatic change could affect agriculture in several ways such as quantity and quality of crops in terms of productivity, growth rates, photosynthesis and transpiration rates, moisture availability etc.
Climate change directly affect food production across the globe.
As a result of our consumer culture lifestyle, we are polluting the earth and slowly changing its temperature. As a result, weather patterns will be less predictable and water level will rise significantly
Climate change is an extended change in the Earth’s regular pattern of atmospheric conditions and its fluctuations
Global warming is caused by an enhanced greenhouse effect mostly caused by anthropogenic activity
Global climate change is a change in the long-term weather patterns that characterize the regions of the world. The term "weather" refers to the short-term (daily) changes in temperature, wind, and/or precipitation of a region. In the long
run, the climatic change could affect agriculture in several ways such as quantity and quality of crops in terms of productivity, growth rates, photosynthesis and transpiration rates, moisture availability etc. Climate change is likely to directly impact food production across the globe. Increase in the mean seasonal
temperature can reduce the duration of many crops and hence reduce the yield. In areas where temperatures are already close to the physiological maxima for crops, warming will impact yields more immediately (IPCC, 2007). Drivers of climate
change through alterations in atmospheric composition can also influence food production directly by its impacts on plant physiology. The consequences of agriculture’s contribution to climate change, and of climate change’s negative impact on agriculture, are severe which is projected to have a great impact on food production and may threaten the food security and hence, require special agricultural measures to combat with.
Impact of climatic change on agricultureShashi Singh
Climate change and agriculture are interrelated processes, both of which take place on a global scale. Climate change affects agriculture in a number of ways, including through changes in average temperatures, rainfall, and climate extremes (e.g., heat waves); changes in pests and diseases; changes in atmospheric carbon dioxide and ground-level ozone concentrations; changes in the nutritional quality of some foods; and changes in sea level.
Climate change impacts on soil health and their mitigation and adaptation str...Rajendra meena
The increasing concentration of greenhouse gases (GHGs) is bringing about major changes to the global environment resulting in global warming, depletion of ozone concentration in the stratosphere, changes in atmospheric moisture and precipitation and enhanced atmospheric deposition. These changes impact several soil processes, which are influence soil health. Soil health refers to the capacity of soil to perform agronomic and environmental functions. A number of physical, chemical and biological characteristics have been proposed as indicators of soil health. Generally, biological processes in soil such as decomposition and storage of organic matter, C and N cycling, microbial and metabolic quotients are likely to be influenced greatly by climate change and have thus high relevance to assess climate change impacts (Allen et al., 2011). Soil organic matter (SOM) exerts a major influence on several soil health indicators and is thus considered a key indicator of soil health. An optimal level of SOM is essential for maintaining soil health and alleviating rising atmospheric CO2 concentration. Elevated CO2 has increased C decay rates generally but in some cases elevated CO2 increases soil C storage (Jastrow et al., 2016). Enhancing the soil organic carbon pool also improves agro-ecosystem resilience, eco-efficiency, and adaptation to climate change. Healthy soils provide the largest store of terrestrial carbon, when managed sustainably; soils can play an important role in climate change mitigation by storing carbon (carbon sequestration) and decreasing greenhouse gas emissions in the atmosphere (Paustian et al., 2016).
Wright et al., (2005) reported that no tillage increase soil organic carbon (SOC) and nitrogen (SON) 11 and 21% in corn and 22 and 12 % in cotton than conventional tillage. Agroforestry system at farmers’ field enhance soil biological activity and amongst trees, P. cineraria based system brought maximum and significant improvement in soil biological activity (Yadav et al ., 2011).
Agriculture in developing countries must undergo a significant transformation in order to meet the related challenges of achieving food security and responding to climate change. Projections based on population growth and food consumption patterns indicate that agricultural production will need to increase by at least 70 percent to meet demands by 2050. Most estimates also indicate that climate change is likely to reduce agricultural productivity, production stability and incomes in some areas that already have high levels of food insecurity. Developing climate-smart agriculture is thus crucial to achieving future food security and climate change goals. This seminar describe an approach to deal with the above issue viz. Climate Smart Agriculture (CSA) and also examines some of the key technical, institutional, policy and financial responses required to achieve this transformation. Building on cases from the field, the seminar try to outlines a range of practices, approaches and tools aimed at increase the resilience and productivity of agricultural product systems, while also reducing and removing emissions. A part of the seminar elaborates institutional and policy options available to promote the transition to climate-smart agriculture at the smallholder level. Finally, the paper considers current gaps and makes innovative suggestion regarding the combined use of different sources, financing mechanism and delivery systems.
Statistical Model
ii Phonological Model
iii Mechanistic Model
iv Deterministic Model
v Stochastic Model
Dynamic Model
vii Static Model
viii Crop Simulation Models
ix Descriptive Model
x Explanatory Model
contact: dhota3@gmail.com
Effect of Global Warming on Soil Organic CarbonAmruta Raut
Currently surface Temperature are rising by about 0.2 °C (0.36 °F) per decade so how it will affect soil organic carbon level and what are the different strategies to sequester carbon explain in detail
Climate change, its impact on agriculture and mitigation strategiesVasu Dev Meena
According to IPCC (2007) “Climate change refers to a statistically significant variation in either the mean state of the climate or in its Variability, persisting for an extended period (typically decades or longer)”.
Climate change has adverse impacts on agriculture, hydropower, forest management and biodiversity.
In the long run, the climatic change could affect agriculture in several ways such as quantity and quality of crops in terms of productivity, growth rates, photosynthesis and transpiration rates, moisture availability etc.
Climate change directly affect food production across the globe.
As a result of our consumer culture lifestyle, we are polluting the earth and slowly changing its temperature. As a result, weather patterns will be less predictable and water level will rise significantly
Climate change is an extended change in the Earth’s regular pattern of atmospheric conditions and its fluctuations
Global warming is caused by an enhanced greenhouse effect mostly caused by anthropogenic activity
Global climate change is a change in the long-term weather patterns that characterize the regions of the world. The term "weather" refers to the short-term (daily) changes in temperature, wind, and/or precipitation of a region. In the long
run, the climatic change could affect agriculture in several ways such as quantity and quality of crops in terms of productivity, growth rates, photosynthesis and transpiration rates, moisture availability etc. Climate change is likely to directly impact food production across the globe. Increase in the mean seasonal
temperature can reduce the duration of many crops and hence reduce the yield. In areas where temperatures are already close to the physiological maxima for crops, warming will impact yields more immediately (IPCC, 2007). Drivers of climate
change through alterations in atmospheric composition can also influence food production directly by its impacts on plant physiology. The consequences of agriculture’s contribution to climate change, and of climate change’s negative impact on agriculture, are severe which is projected to have a great impact on food production and may threaten the food security and hence, require special agricultural measures to combat with.
Impact of climatic change on agricultureShashi Singh
Climate change and agriculture are interrelated processes, both of which take place on a global scale. Climate change affects agriculture in a number of ways, including through changes in average temperatures, rainfall, and climate extremes (e.g., heat waves); changes in pests and diseases; changes in atmospheric carbon dioxide and ground-level ozone concentrations; changes in the nutritional quality of some foods; and changes in sea level.
Climate change impacts on soil health and their mitigation and adaptation str...Rajendra meena
The increasing concentration of greenhouse gases (GHGs) is bringing about major changes to the global environment resulting in global warming, depletion of ozone concentration in the stratosphere, changes in atmospheric moisture and precipitation and enhanced atmospheric deposition. These changes impact several soil processes, which are influence soil health. Soil health refers to the capacity of soil to perform agronomic and environmental functions. A number of physical, chemical and biological characteristics have been proposed as indicators of soil health. Generally, biological processes in soil such as decomposition and storage of organic matter, C and N cycling, microbial and metabolic quotients are likely to be influenced greatly by climate change and have thus high relevance to assess climate change impacts (Allen et al., 2011). Soil organic matter (SOM) exerts a major influence on several soil health indicators and is thus considered a key indicator of soil health. An optimal level of SOM is essential for maintaining soil health and alleviating rising atmospheric CO2 concentration. Elevated CO2 has increased C decay rates generally but in some cases elevated CO2 increases soil C storage (Jastrow et al., 2016). Enhancing the soil organic carbon pool also improves agro-ecosystem resilience, eco-efficiency, and adaptation to climate change. Healthy soils provide the largest store of terrestrial carbon, when managed sustainably; soils can play an important role in climate change mitigation by storing carbon (carbon sequestration) and decreasing greenhouse gas emissions in the atmosphere (Paustian et al., 2016).
Wright et al., (2005) reported that no tillage increase soil organic carbon (SOC) and nitrogen (SON) 11 and 21% in corn and 22 and 12 % in cotton than conventional tillage. Agroforestry system at farmers’ field enhance soil biological activity and amongst trees, P. cineraria based system brought maximum and significant improvement in soil biological activity (Yadav et al ., 2011).
Agriculture in developing countries must undergo a significant transformation in order to meet the related challenges of achieving food security and responding to climate change. Projections based on population growth and food consumption patterns indicate that agricultural production will need to increase by at least 70 percent to meet demands by 2050. Most estimates also indicate that climate change is likely to reduce agricultural productivity, production stability and incomes in some areas that already have high levels of food insecurity. Developing climate-smart agriculture is thus crucial to achieving future food security and climate change goals. This seminar describe an approach to deal with the above issue viz. Climate Smart Agriculture (CSA) and also examines some of the key technical, institutional, policy and financial responses required to achieve this transformation. Building on cases from the field, the seminar try to outlines a range of practices, approaches and tools aimed at increase the resilience and productivity of agricultural product systems, while also reducing and removing emissions. A part of the seminar elaborates institutional and policy options available to promote the transition to climate-smart agriculture at the smallholder level. Finally, the paper considers current gaps and makes innovative suggestion regarding the combined use of different sources, financing mechanism and delivery systems.
Statistical Model
ii Phonological Model
iii Mechanistic Model
iv Deterministic Model
v Stochastic Model
Dynamic Model
vii Static Model
viii Crop Simulation Models
ix Descriptive Model
x Explanatory Model
contact: dhota3@gmail.com
Effect of Global Warming on Soil Organic CarbonAmruta Raut
Currently surface Temperature are rising by about 0.2 °C (0.36 °F) per decade so how it will affect soil organic carbon level and what are the different strategies to sequester carbon explain in detail
Higher concentrations of atmospheric carbon dioxide affect crops in two important ways: they boost crop yields by increasing the rate of photosynthesis, which spurs growth, and they reduce the amount of water crops lose through transpiration.
Anthropogenic Contributions to the Atmospheric CO2 Levels and Annual Share of...Premier Publishers
Green house gases are derived from both natural systems and human activities. The emitted gases retained in the atmosphere represent the main cause of global climate change. Rising anthropogenic CO2 emissions are anticipated to drive change to ecosystems. This rise in emissions was largely driven by affluence (consumption per capita) and population growth, aided by changes in production structure of industries, consumption baskets of households and shifts in the consumption vs. investment balance. Anthropogenic CO2 emissions are known to alter hydrological cycles, disrupt marine ecosystems and species lifecycles, and cause global habitat loss. To achieve significant emission savings, there is a need to address the issue of affluence. One of the major initiatives is to actively intervene in non-sustainable lifestyles to achieve emission reductions. The findings of this review are vital for a comprehensive and integrated approach for mitigating climate change and to reduce the impacts of CO2 emissions.
This is the fourth lesson titled 'Attributions of climate change' of the course ' Climate Change and Global environment' conducted at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka.
CONTENTS= Weather, Climate, climate change, Global climate change, Global warming, Factors Affecting climate, Vulnerability of agriculture to climate change, Agriculture and climate change is a three-fold relationship, Influence of agriculture in climate change, Impacts of climate change on agriculture, What can be done? , Conclusion
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
2. What is climate?
Climate is an average of weather
(temperature, rainfall...) over a “long”
time (more than 2-3 weeks).
3. Climate Change and Environmental Change
Dictionary.com
Climate change : A long-term change in the earth’s
climate, especially a change due to an increase in the
average atmospheric temperature:
Environmental Change: A change in precipitation
or global temperatures. Environmental change may be
the result of natural occurrences or impacted by
human activity.
4. What makes climate change?
Changes in the sun
Changes in the earth's orbit
Changes in the clouds
Changes in ice sheets
Volcanic eruptions
Changes in the gases in the atmosphere (Greenhouse effect)
Internal Wiggles (for example El Nino)
Some cause bigger changes, some cause small changes
Some cause slower changes, some cause fast changes
Some cause changes that last, some cause changes that go away fast
Climate changes can be natural or human caused.
Humans can affect the climate by changing the gases
in the atmosphere (greenhouse effect)
5. 5
1. The Natural Greenhouse Effect
2. The Enhanced Greenhouse Effect
The first being useful, the second, well who knows?
There are two sources of
the Greenhouse Effect
6. 6
The Natural Greenhouse Effect
• Without it, Earth would have no living
things and would be more like Venus or
Mars
• This is because the temperature would
be on average 300C colder than it is
7. The Natural Greenhouse Effect at work
• The Earth is covered by a blanket of gas.
• The energy from the Sun reaches the
Earth’s surface, where some of it is
converted to heat energy.
• Most of the heat( blue arrows) is re-
radiated towards space, but some is
trapped by the greenhouse gases in the
atmosphere.
• This natural effect allows the Earth’s
temperature to be kept at a level
necessary to support life.
8. But then there is the Enhanced Greenhouse
Effect
• Look how this is different!
• Much more of the heat from
the sun gets trapped in the
atmosphere
• So the Earth gets hotter
9. ● Carbon dioxide (CO2) is a major greenhouse gas
● Human burning of fossil fuels, and plants releases CO2
Human influence on climate:
the Greenhouse Effect
10. The most important human-affected greenhouse gases are:
Greenhouse Gas
Life Span in the
Atmosphere
Heat-Trapping
Effectiveness
(1 is lowest)
Carbon Dioxide (CO2) 2-30 years 1
Methane (CH4) 6-11 years 20-30 (21)
Nitrous Oxide (N2O) 120-150 years 296
Fluorinated Gases 65-111 years 15,000-20,000
11. Have we changed the climate?
Changes in global temperature over the last 125 years
12. Have we changed the climate?
Changes in global temperature over the last 1,000 years
13. * From: IPCC, 2007: Summary for Poicymakers. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth
Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M.Tignor
and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.
Have we changed the climate?
14. 1928
2000
The South Cascade
glacier retreated
dramatically in the 20th
century
Have we changed the climate?
Glaciers are retreating
all over world
16. Sea level rise in the Indian subcontinent
Bangladesh
• Displace 13 million
• 16% of national
rice production lost
India
• Displace 7 million,
est. cost $Bn 230
• Inundate 1700 km2 agricultural land
• Necessitate 4000 km of dykes and sea walls
• Submerge 576 km2 total land and 4200 km of roads
17. Bangladesh is projected to lose about 17% of its land
area with a sea level rise of one meter - very difficult to
adapt due to lack of adaptive capacity
projected
present
18. Summary of Projected Climate Changes
• Temperature to increase 3oC by 2050 and 5oC by 2070 over
land areas
• Precipitation increases in high latitudes (temperate) but a
drying in mid-latitudes (sub-tropics) over Asia
• Equatorial tropical zone – uncertain but little mean change
expected
• No increase in cyclone frequency but intensity could
increase by 10-20%
• Accelerated melting of glaciers – 65% of China’s glaciers
will not exist by 2050 with current and projected warming
trends
• Sea level rise
19. WFP (World Food Programme) is the world’s largest humanitarian agency fighting hunger
20. Agriculture and Climate Change:
A three-fold relationship
I. Agriculture as a contributor to Climate Change
II. Impacts of Climate Change on Agriculture
III. Agriculture as a potential moderator of Climate
Change
21. I. Agriculture as a contributor to Climate Change
Source of 30% of total global anthropogenic emissions of
GHGs
• Particulate matter and GHGs from land
clearance by fire and burning of residues
• > ½ total global anthropogenic emissions
of CH4 and N2O
– CH4: from rice and livestock
production
– N2O from fertilizers and manure
(FAO 2003, Gomiero et al. 2008)
22. Agriculture’s contribution to GHGs
Carbon
dioxide
Methane Nitrous
oxide
Land use
change,
especially
deforestation
Ruminants Livestock
(including
manure
applied to
farmland)
Rice
production
Mineral
fertilizers
Biomass
burning
Biomass
burning
23. Nitrogen fertilizers and N2O production in
agricultural soils
• Generally there is large emission of N2O
immediately after application of fertilizer N
• After about 6 weeks, the emission rate falls
and fluctuates around a low level
• On an average , emission of N2O from
different fertilizer types: can be calculated as:
N2O emitted = 1.25 % of kg N applied
24. Atmospheric concentrations of nitrous oxide over the last 10,000 years (large panels) and since
1750 (inset panels). Measurements are shown from ice cores (symbols with different colours for
different studies) and atmospheric samples (red lines). The corresponding radiative forcings are
shown on the right hand axes of the large panels. (Source IPCC, 2007)
25. N2O emissions from various source categories in
India in Gg-N2O (Source: Garg et al. 2006)
Source categories 1985 1990 1995 2000 2005 Compounded
annual growth
rate (%)
Synthetic fertilizer use 80 94 109 129 151 3.2
Field burning of
agricultural residues
15 18 21 21 20 1.4
Indirect soil emissions 17 19 21 25 30 2.9
Manure management 4 5 6 6 8 3.9
Fossil fuel combustion 7 9 12 15 19 4.9
Industrial processes 6 7 9 12 16 5.0
Wastes 5 6 7 8 9 2.8
Total N2O 134 158 185 217 253 3.2
26. N2O emissions in India in the reference scenarios 2000 and
2020 (Source: Garg et al. 2004)
27. II. Impacts of Climate Change on Agriculture
Four main climate related drivers on agriculture:
1. Elevated carbon dioxide
2. Rainfall and associated water resource availability
3. Temperature – both direct and indirect through
evaporation
4. Extreme weather events (wind, flood damage)
These interact to affect agricultural productivity, quality,
pests and diseases.
• Sea level rise and surge – inundating and ruining coastal
agricultural lands
28.
29.
30. Vulnerability of Asian Sectors Related to Agriculture to Climate
Change
Regions Food and Fibre Water
Resources
Coastal
Ecosystems
Arid and semi-arid Asia
Central Asia Highly vulnerable Highly
vulnerable
Moderately
vulnerable
Tibetan Plateau Slightly or not
vulnerable
Moderately
vulnerable
Not applicable
Temperate Asia Highly vulnerable Highly
vulnerable
Highly vulnerable
Tropical Asia and Small Island States
South Asia Highly vulnerable Highly
vulnerable
Highly vulnerable
Southeast Asia Highly vulnerable Highly
vulnerable
Highly vulnerable
31. III. Agriculture as part of the solution?
Increasing carbon sequestration through land
management
Agroforestry
Rotations with cover crops, green manure
Conservation tillage
Could reduce global CO2 emissions by 5-15%
Organic farming (but limited benefits)
Enhances carbon storage in soil
Biogas digesters?
(Gomiero et al. 2008, FAO 2003, Niles et al. 2002)
32. Soil is a part of the solution
for climate change
• Soil plays a pivotal role in global carbon and nitrogen
cycles.
• The amount of carbon stored in soil organic matter is
nearly three times higher than that in the above ground
biomass and around two times as high as in the
atmosphere
• Thus even small changes in soil organic carbon content
can have great impact on CO2 concentrations in the
atmosphere.
33. • It is estimated that soils can sequester around
20 Pg (Peta gram, 1015 g) C in 25 years, more
than 10 % of the anthropogenic emissions.
• The maintenance of existing carbon reservoirs
is among the highest priorities in striving for
climate change mitigation.
Soil is a part of the solution
for climate change
34. • Global mitigation potential from agriculture (excluding fossil
fuel offsets from biomass) by 2030 is estimated to be 5.5-6.0 Gt
CO2-eq/yr (G or giga is 109)
• Soil carbon sequestration has an estimated 89% contribution to
the technical potential
• 70% of the mitigation potential is in developing countries
• GHG emissions could also be reduced by substituting fossil fuels
with energy produced from agricultural feed stocks (e.g., crop
residues, dung, energy crops)
• Agricultural GHG mitigation options are cost competitive with
non-agricultural options (e.g., energy, transportation, forestry)
• Energy efficiency in agri-production (e.g., improved agronomic
practices, nutrient use, tillage, and residue management)
Agriculture offers multiple solutions to
climate change mitigation
36. Climate-smart agriculture
Agriculture that sustainably
• increases productivity
• increases resilience (adaptation)
• reduces/removes GHGs and
• enhances achievement of national food
security and development goals
37. Two main goals of our times
1. Achieving food security
2. Avoiding dangerous climate change
We must reach both!