Arctic geotraces
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The document discusses Arctic GEOTRACES expeditions to study trace elements in the Arctic Ocean. It notes that trace elements influence biological processes and ecosystem dynamics in the ocean. The GEOTRACES program involves over 30 nations studying all major ocean basins over the next decade. The Arctic Ocean is globally important due to its river runoff, soil carbon stores, and large shelf area. In 2009, scientists presented a plan for Arctic GEOTRACES expeditions. Currently, countries are working on a larger GEOTRACES program in the Arctic Ocean in 2015, and will meet in 2012 to plan further.
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The document discusses climate change research activities funded by the European Commission under the Seventh Framework Programme (FP7). It provides an overview of FP7's structure and budget breakdown for climate change research. Key areas of research included understanding and predicting climate change; developing climate-friendly technologies; and improving tools for climate change mitigation and adaptation policy analysis. Specific projects studied climate processes, the role of oceans, carbon and nitrogen cycles, impacts in the Arctic, atmosphere pollution, and effects on water resources and ecosystems in Europe.
Physical Oceanography
The study of physical oceanography helps in understanding all these aspects in detail. Let us see most of these factors and processes in our future modules. Mathematical models of all these processes are also developed using these phenomena and mechanisms. The individual aspects of all the elements of physical oceanography are to be studied in detail.
Interpolation
Spatial variability of nutrients (N, P) in a deep, temperate lake with a low trophic level supported by global navigation satellite systems, geographic information system and geostatistics
Do submerged plants improve the water quality in mining subsidence reservoirs?
Applied Ecology and Environmental Research, 2020
This paper provides an analysis of the effect of submerged vegetation on the physicochemical parameters of water with particular regard to transparency in mining subsidence reservoirs (MSR). The research encompassed 8 subsidence reservoirs with a diversified structure of submerged plants in the littoral zone. It has been proven that reservoirs where submerged vegetation coverage is greater than 25% of the water surface area are characterized by significantly greater transparency of water. High water transparency is desirable due to a greater utility value of reservoirs and their biologic diversity. The results from this research indicate that supporting the development of submerged vegetation in mining subsidence reservoirs may be an effective method for improving the water quality of such reservoirs.
Planetary boundaries
This document proposes a new framework called "planetary boundaries" to define a safe operating space for humanity to avoid dangerous global environmental change. It identifies nine key Earth system processes and attempts to quantify boundary levels for seven of them, beyond which risks crossing thresholds into uncontrollable change. The boundaries are climate change, ocean acidification, stratospheric ozone depletion, interference with biogeochemical nitrogen and phosphorus cycles, global freshwater use, land system change, and rate of biodiversity loss. The paper argues humanity has already exceeded boundaries for climate change, biodiversity loss and nitrogen cycle. Crossing boundaries increases risks and impacts, and boundaries are interconnected, so exceeding one could impact others.
Interrelationship between nutrients and chlorophyll-a in an urban stormwater ...
Interrelationship between nutrients and chlorophyll-a in an urban stormwater ...Journal of Contemporary Urban Affairs
This study investigated ecological processes in an urban stormwater lake during its ice-covered period from November to mid-April. Data from two winter seasons showed chlorophyll-a levels under ice were 22% of open-water levels, indicating primary productivity still occurs. Nutrients like nitrogen and phosphorus were significantly higher under ice, likely from road and urban runoff. Under ice, total phosphorus levels correlated positively with chlorophyll-a when nutrient ratios were low, suggesting phosphorus controls algal growth. The results provide evidence of active nutrient cycles in stormwater lakes during winter, contrary to assumptions of dormancy under ice cover.L'acidification des océans / IGBP, IOC, SCOR
The document summarizes key findings from the Third Symposium on the Ocean in a High-CO2 World, which convened over 500 experts. The main points are:
1) Ocean acidification is increasing at an unprecedented rate due to human CO2 emissions and is affecting ecosystems and biodiversity. It has the potential to impact food security and limit the ocean's ability to absorb more CO2.
2) Research shows adverse effects on some organisms' ability to form shells and skeletons as well as reduced survival, growth, and reproduction. However, some organisms can tolerate or benefit from acidification.
3) If emissions continue high, large parts of the polar oceans will become corrosive by decades
Lecture12011.ppt
This document provides an overview of the CE 374K Hydrology course, including the syllabus, sequence of topics, and required readings. It introduces hydrology as both a science and profession, covering the hydrologic cycle, global water balance, water as a physical substance, and issues around water data sharing. Key points about the hydrologic cycle, global water resources, and properties of the water molecule like polarity and density are also summarized.
Thesis presentation shayeem
The document proposes establishing the National Oceanographic Research Institute (NORI) in Bangladesh to promote research and education in marine sciences. NORI would extend cooperation to other marine science organizations and provide shipboard facilities for ocean observations. Its goals are to study oceanographic parameters influencing fisheries; develop coastal and marine aquaculture; generate green energy from the sea; and create jobs and tourism opportunities. NORI would be established according to the National Oceanography Research Institute Law 2013 to ensure sustainable development and protection of Bangladesh's marine resources and environment.
Miriam Kastner: Her findings on METHANE HYDRATES in Ocean Acidification Summ...
Atmospheric carbon dioxide (CO2) levels are rising as a result of human activities, such as fossil fuel burning, and are increasing the acidity of seawater. This process is known as ocean acidi cation. Historically, the ocean has absorbed approximately 30% of all CO2 released into the atmosphere
by humans since the start of the industrial revolution, resulting in a 26% increase in the acidity of the ocean1.
Ocean acidi cation causes ecosystems and marine biodiversity to change. It has the potential to affect food security and it limits the capacity of the ocean to absorb CO2 from human emissions. The economic impact of ocean acidi cation could be substantial.
Reducing CO2 emissions is the only way to minimise long-term, large-scale risks.
20100415 herman ridderinkhof_zeeonderzoek_nioz
NIOZ conducts sea research to understand oceans and sustainability. It has over 200 staff across departments like marine ecology and oceanography. Using research vessels and equipment, NIOZ studies topics like cold water corals, ocean currents, climate variability, and the role of internal waves in vertical mixing. Internal waves are important because they transport sediment, affect biology, and influence global ocean circulation.
Biogeographi atlassouthernocean
A new atlas, providing the most thorough audit of marine life in the Southern Ocean, is published this week by the Scientific Committee on Antarctic Research (SCAR). Leading marine biologists and oceanographers from all over the world spent the last four years compiling everything they know about ocean species from microbes to whales. It’s the first time that such an effort has been undertaken since 1969 when the American Society of Geography published its Antarctic Map Folio Series.
In an unprecedented international collaboration 147 scientists from 91 institutions across 22 countries (Australia, Belgium, Brazil, Canada, Chile, Denmark, France, Germany, Ireland, Italy, Japan, the Netherlands, New Zealand, Norway, Poland, Portugal, Russia, South Africa, Spain, Switzerland, the UK and the USA) combined their expertise and knowledge to produce the new Biogeographic Atlas of the Southern Ocean. More than 9000 species are recorded, ranging from microbes to whales. Hundreds of thousands of records show the extent of scientific knowledge on the distribution of life in the Southern Ocean. In 66 chapters, the scientists examine the evolution, physical environment, genetics and possible impact of climate change on marine organisms in the region.
Chief editor, Claude De Broyer, of the Royal Belgian Institute of Natural Sciences, said: “This is the first time that all the records of the unique Antarctic marine biodiversity, from the very beginnings of Antarctic exploration in the days of Captain Cook, have been compiled, analysed and mapped by the scientific community. It has resulted in a comprehensive atlas and an accessible database of useful information on the conservation of Antarctic marine life.”
Acrs2012 safe coastal_sl_final
This document discusses using space technologies and earth observation to monitor coastal dynamics in Kalpitiya, Sri Lanka. It analyzes shoreline changes over different time periods using historical aerial photos and satellite imagery. Key findings include:
1. Sediment samples and satellite imagery show sediment moves north along the west coast from river mouths, accumulating in Kalpitiya.
2. Long-term shoreline analysis from 1956-2010 shows areas of both erosion and accretion over 55 years, with the largest land gains at Kandakuliya.
3. Short-term dynamics were examined using high-frequency satellite imagery, finding seasonal shoreline variation.
4. Results were shared with local stakeholders to inform coastal
What is oceanography and what are its role in Science Olympiad.pdf
Oceanography is a very crucial topic of the science Olympiad. It is a logical discipline that digs into the exhaustive investigation of the World's seas.
Limnology and Wetland Management 2023 NaRM.pptx
Limnology and Wetland Management is the course that is given BSc students in Enviromental Science and Natural Resources Management Department in Ethiopian Universities. I have been using this material for the purpose of teaching in class only.
copetti_carniato_2013
This document summarizes the results of modeling exercises that simulate the impact of climate change on two types of surface aquifers: lakes and rivers. For lakes, it focuses on the impact of global warming on the thermal structure of two Italian lakes, Lake Como and Lake Pusiano, using a hydrodynamic model. The model projects an increase in average yearly lake temperature of 0.04°C per year from 1970-2000 and 0.03°C per year from 2001-2050 according to IPCC climate change scenarios. These increases are expected to reduce mixing between lake layers and impact phytoplankton growth and cyanobacteria blooms. For rivers, it describes a methodology using models to estimate changes in nutrient loads in
Impact of the salinity gradient on the mollusc fauna in flooded mine subsiden...
Archives of Environmental Protection, 2014
This paper presents the impact of salinisation on the aquatic mollusc fauna in fl ooded mine subsidences in the Karvina region (Czech Republic). The results of the previous research on salinity in fl ooded mine subsidences show that some of them contain a high content of dissolved inorganic substances (above 1000 mg•l-1). These substances can affect the vegetation and animals occurring in the water and the surrounding area. The phylum of Mollusca was selected as a model group for the fi eldwork as it includes species with the proven bioindication potential. The occurrence of aquatic mollusc species was studied at 10 sites. The sites were selected based on the content of dissolved substances (the salinity gradient from <500 to >1000 mg•l-1. A total of 12 aquatic mollusc species were found, including one species identifi ed as a potential bioindicator of the negative effect of salinisation on aquatic biota. The analysis showed statistically signifi cant positive correlations between the content of dissolved inorganic substances and the presence of alien species Potamopyrgus antipodarum (J.E. Gray, 1843). The gradient of salinity signifi cantly affects the species composition of the mollusc fauna in fl ooded mine subsidences and may affect the biodiversity of this group.
Climate, carbon and coral reefs
Tropical coral reefs cover an area of over 284 000 km2, providing habitat for thousands of species and yielding more than US$ 30 billion annually in global goods and services, such as coastline protection, tourism and food. Corals reefs are now threatened by the increasing concentrations of carbon dioxide in the atmosphere, while warmer sea temperatures are disturbing the delicate symbiosis between coral organisms and algae. For example, 16 per cent of all tropical coral reefs were killed off by thermal stress during a single extreme El Niño–Southern Oscillation event in 1997–1998. As a result of escalating atmospheric levels of carbon dioxide, more of this gas is being dissolved in the world’s oceans. This has already reduced ocean pH and the trend is projected to continue. Moreover, the altered ocean chemistry is expected to have major corrosive effects on marine ecosystems and to alter the calcification rates of corals, phytoplankton and other species.
Similar to Arctic geotraces (20)
Remote Sensing Techniques for Oceanography Satelitte and In Situ Observations
Remote Sensing Techniques for Oceanography Satelitte and In Situ Observations
Do submerged plants improve the water quality in mining subsidence reservoirs?
Do submerged plants improve the water quality in mining subsidence reservoirs?
Interrelationship between nutrients and chlorophyll-a in an urban stormwater ...
Interrelationship between nutrients and chlorophyll-a in an urban stormwater ...
Miriam Kastner: Her findings on METHANE HYDRATES in Ocean Acidification Summ...
Miriam Kastner: Her findings on METHANE HYDRATES in Ocean Acidification Summ...
What is oceanography and what are its role in Science Olympiad.pdf
What is oceanography and what are its role in Science Olympiad.pdf
Impact of the salinity gradient on the mollusc fauna in flooded mine subsiden...
Impact of the salinity gradient on the mollusc fauna in flooded mine subsiden...
Arctic geotraces
- 1. Arctic GEOTRACES Expeditions Per S Andersson1 and Per-Olov Persson1, 2 1 Laboraatory for Isotope Geology, Swedish Museum of Natural Histroy, Box 50007, 104 05 Stockholm, Sweden 2 Department of Applied Environmental Science (ITM) Stockholm University, 106 91 Stockholm, Sweden Trace elements serve as regulators of biological processes in the ocean, influencing marine ecosystem dynamics and the carbon cycle. GEOTRACES is an international programme with a mission to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions www.geotraces.org. Scientists from approximately 30 nations are involved in the programme (Figure 1), which is designed to study all major ocean basins over the next decade Figure 1. GEOTRACES Science plan Arctic GEOTRACES The Arctic Ocean is the smallest and shallowest of the world oceans but globally important and very unique because: - Arctic rivers contribute ~10% of global river runoff - Arctic tundra contain ~33% of the world’s soil carbon - Arctic shelves represent ~25% of global shelf area The Arctic is sensitive to and a key area for understanding global change At a workshop in Delmenhorst Germany in 2009 an overall plan for an Arctic GEOTRACES programme was presented (Figure 2). Currently, there is an international effort to conduct a larger GEOTRACES programme in the Arctic Ocean during 2015. Several countries including Canada, Germany, Sweden, Russia, United Kingdom will meet in Vancouver, May 2012 for detailed planning Figure 2. Expedition plans, red lines show planed expeditions and black lines show tracks finished during IPY Funding agencies for Arctic planning workshop in Delmenhorst The Stockholm Polar Week