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![Global Warming
Global warming is a long-term rise in the average
temperature of the Earth's climate system, an
aspect of climate change shown by
temperature measurements and by multiple
effects of the warming.[2][3]
The term commonly
refers to the mainly human-caused observed
warming since pre-industrial times and its
projected continuation,[4]
though there were also
much earlier periods of global warming.[5]
In the
modern context the terms global
warming and climate change are commonly
used interchangeably,[6]
but climate
change includes both global warming and its
effects, such as changes to precipitation and
impacts that differ by region.[7][8]
Many of the
observed warming changes since the 1950s are
unprecedented in the
instrumental temperature record, and in historical
and paleoclimate proxy records of climate
change over thousands to millions of years.](https://image.slidesharecdn.com/borcilacristian-190123080600/85/Borcila-cristian-2-320.jpg)
![Regional trends and short-
term fluctuations
Global warming refers to global
averages. It is not uniform around the
world: effects can vary by region.[41]
Since
1979, global average land temperatures
have increased about twice as fast as
global average ocean temperatures
(0.25 °C per decade against 0.13 °C per
decade).[42]
Ocean temperatures
increase more slowly than land
temperatures because of the larger
heat capacityof the oceans and
because oceans lose more heat by
evaporation.[43]
Since the
beginning of industrialisation in the 18th
century, the temperature difference
between the hemispheres has increased
due to melting of sea ice and snow in
the North, and because there is more
land in the Northern Hemisphere.[44]
In the
past 100 years, average Arctic
temperatures have increased at almost
twice the rate of the rest of the world.
[45]
This has been referred to as Arctic
amplification.](https://image.slidesharecdn.com/borcilacristian-190123080600/85/Borcila-cristian-3-320.jpg)
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- 1. Global Warming its consequences andpossible steps to be taken. Borcila Cristian-Eduard
- 2. Global Warming Globalwarming is a long-term rise in the average temperature of the Earth's climate system, an aspect of climate change shown by temperature measurements and by multiple effects of the warming.[2][3] The term commonly refers to the mainly human-caused observed warming since pre-industrial times and its projected continuation,[4] though there were also much earlier periods of global warming.[5] In the modern context the terms global warming and climate change are commonly used interchangeably,[6] but climate change includes both global warming and its effects, such as changes to precipitation and impacts that differ by region.[7][8] Many of the observed warming changes since the 1950s are unprecedented in the instrumental temperature record, and in historical and paleoclimate proxy records of climate change over thousands to millions of years.
- 3. Regional trends andshort- term fluctuations Global warming refers to global averages. It is not uniform around the world: effects can vary by region.[41] Since 1979, global average land temperatures have increased about twice as fast as global average ocean temperatures (0.25 °C per decade against 0.13 °C per decade).[42] Ocean temperatures increase more slowly than land temperatures because of the larger heat capacityof the oceans and because oceans lose more heat by evaporation.[43] Since the beginning of industrialisation in the 18th century, the temperature difference between the hemispheres has increased due to melting of sea ice and snow in the North, and because there is more land in the Northern Hemisphere.[44] In the past 100 years, average Arctic temperatures have increased at almost twice the rate of the rest of the world. [45] This has been referred to as Arctic amplification.
- 4.