Please enable JavaScript.
Coggle requires JavaScript to display documents.
factors that cause global climate change - Coggle Diagram
factors that cause global climate change
temperature
climate become warmer and warmer and 21st century become the warmest since 1850
1983-2012 was likely to be the warmest 30-year period over the last 1400 years in the Northern Hemisphere.
The global mean surface temperature rose by 0.85 °C during the period of 1880-2012.
precipitation
higher moisture-holding capacity of the atmosphere
Increase in air temperature
enhances the hydrological cycle
altering the characteristics of precipitation amount
More land areas experience increase in annual precipitation
drought
less intense, or shorter in some other regions
more than 50% of the counties in the US were designated as disaster areas
droughts have become less frequent
mostly due to drought
extreme weather event
spatial extent
duration
intensity
timing of extreme weather events
frequency
More land regions experience increase in heavy precipitation events
tropical cyclone
there are significant increasing trends in frequencies of tropical cyclones
very intense tropical cyclones over the Atlantic since the 1970s
result of trend analysis of tropical cyclone frequency will depend on the choice of data set
there is no significant trend observed in global tropical cyclone frequency.
ice and snow
Glaciers
glacier length, area, volume and mass
The average rate of ice loss from glaciers around the world was 226 billion tonnes per year over the period of 1971-2009, and 275 billion tonnes per year over the period of 1993-2009
have continued to shrink as revealed by the changes
Arctic sea ice
Over the past three decades, Arctic summer sea ice retreat was unprecedented in the last 1,450 years.
Ice sheets
average rate of ice loss from the Antarctic ice sheet has increased from 30 billion tonnes per year over the period of 1992-2001 to 147 billion tonnes per year over the period of 2002-2011
These losses are mainly from the northern Antarctic Peninsula and the Amundsen Sea sector of West Antarctica.
mass loss of the Greenland ice sheet has accelerated since 1992
Snow cover
Snow cover extent has decreased in the Northern Hemisphere, especially in spring.
impact on human and eco-system
delicate balances in ecosystems
Water resources
changing precipitation or melting snow and ice are altering hydrological systems
affecting water resources
Freshwater-related risks will increase significantly with increasing greenhouse gas concentrations
reduce raw water quality due to increased temperature
Climate change affects human
Food security and food production
climate change without adaptation is projected to negatively impact
negative impacts of climate change on crop yields outweighed the positive impacts
increasing food demand
pose large risks to food security globally and regionally
Human health
lead to increases in ill-health in many regions
death due to more intense heat waves and fires
increased heat-related mortality and decreased cold-related mortality
increased likelihood of under-nutrition resulting from diminished food production in poor regions
increased risks from food-, water- and vector-borne diseases
mean sea level
rise mainly due to two processes.
oceans warm and expand
melting of glaciers
global average sea level rose at 1.7 mm per year during the period 1901-2010