Understanding Greenhouse Gases and Climate Change, Esquemas y mapas conceptuales de Física

¡Descarga Understanding Greenhouse Gases and Climate Change y más Esquemas y mapas conceptuales en PDF de Física solo en Docsity! AO What are greenhouse gases? Any gases that cause the “greenhouse effect!” Imagine… a car on a cool but sunny day… AO Global Climate Change • Identifiable change in the climate of Earth as a whole that lasts for an extended period of time (decades or longer) – When due to natural processes, it is usually referred to as global climate variability – Usually refers to changes forced by human activities that change the atmosphere Climate Changes Currently Happening D 3 3 T $ 8 3 2 Y E E 2 o 2 e 3 2 E 5 2 1 1850 Observed globally averaged combined land and ocean surface temperature anomaly 1850-2012 Annual average y mapeo mn a pr A Decadal average 2 Global average sea level (m) relative to 1986-2005 Sea ¡ce extent (million km?) Sea ¡ce extent Arctic (July - August - September) A Antarctic(Febraan) 3 0 00 1920 1940 1960 Year Global mean sea level change 1900-2010 1980 2000 e o 1 e [AN 1900 1950 Year Observed change in surface temperature 1901-2012 1—— ee -0.6-0.4-0.2 0 0.2 04 0.6 0.8 1.0 1.25 1.5 1.75 2.5 eo 0.2 1900 1920 1940 1960 Year 1980 2000 Observed change in annual precipitation over land 1951-2010 -100-50 -25-10 -5-2.5 0 25 5 (mm/yr per decade) 10 25 50 100 What does this graph mean? Total annual anthropogenic GHG emissions by gases 1970-2010 = < o vu la o U e e nm < o "A 2 E [1 o T u] 40 Y o nm o > o +1.3%/yr 1970-2000 +2.2%/yr 2000-2010 49 Gt ¿2.0% Gas IM F-Gases O) CH, CO, FOLU CO, Fossil fuel and industrial processes 1970 1975 1980 1985 1990 Year 1995 2000 2005 2010 What about those natural processes that can cause climate change? Click to explore these natural pr ocesses at the EPA website ! “Their effects [those of human-caused greenhouse gases], together with those of other anthropogenic drivers, have been detected throughout the climate system and are extremely likely to have been the dominant cause of the observed warming since the mid- 20th century.” IPCC Conclusion: •Effects on Ecosystems – Coral systems and other unique ecosystems cannot handle higher temperatures well – Wildfires will increase – Up to 30% of species will be at increased risk for extinction due to the rapid changes in their ecosystems •Effects in North America – Warming in western mountains: several effects – Increased rain: will actually help some crops – Heat waves will increase in number, length, and intensity – Coastal communities will be affected by increased flooding and storms S0... What can we do?