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Deadly Alliance Global Warming and Global Dimming.

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Presentation on theme: "Deadly Alliance Global Warming and Global Dimming."— Presentation transcript:

1 Deadly Alliance Global Warming and Global Dimming

2 Global Warming Heating of earth’s surface by reflected sunlight Heating of earth’s surface by reflected sunlight Increase in greenhouse gases promotesIncrease in greenhouse gases promotes Majority attributed to anthropogenic causes. Majority attributed to anthropogenic causes. Last 40 years 1°C increase globally Last 40 years 1°C increase globally Next 40 years maybe 3°C? Next 40 years maybe 3°C? UT professor using coral samples to collect data UT professor using coral samples to collect data

3 Skeptical?

4 Trend of Temperature with CO 2 *Picture from: http://www.brighton73.freeserve.co.uk/gw/paleo/20000yrfig.htm

5 Global Dimming – what is it? Aerosols – fine particulate matter in form of solids or liquids Aerosols – fine particulate matter in form of solids or liquids Usually from chemical or combustion processesUsually from chemical or combustion processes Are usually ‘washed-out’ in rainAre usually ‘washed-out’ in rain Sulfur containing compoundsSulfur containing compounds Forms Forms Clouds – diffuse fraction of solar irradiance Change optical properties of clouds Lack of rain Famine and drought of 80’s in Ethiopia.

6 Clouds at Molecular Level * From NASA’s eath observatory website Regular occurring particles Aerosol particles

7 Consequences of Global dimming World gets darker World gets darker Plant photosynthesis light limitedPlant photosynthesis light limited Less solar energy possibleLess solar energy possible Masking effects of global warming Masking effects of global warming True global warming affect could already be in the 3°C-5°C range.True global warming affect could already be in the 3°C-5°C range. Clouds are chemically changed Clouds are chemically changed Causes famine and droughtCauses famine and drought Acid rain formationAcid rain formation

8 Global Dimming – sources NOx total = 41 NOx total = 41 Fossil Fuels - 21Fossil Fuels - 21 Aircraft - 0.58Aircraft - 0.58 Lightning - 7Lightning - 7 NH 3 total = 54 NH 3 total = 54 Domestic Animals - 21.6Domestic Animals - 21.6 Oceans - 8.2Oceans - 8.2 SO 2 total = 88 SO 2 total = 88 Fossil fuels - 76 Volcanoes - 9.3 H 2 S total = 25 H 2 S total = 25 Oceans - 24 VOC’s total = 236 VOC’s total = 236 Anthropogenic - 109 Terpenes - 127 *From IPCC Third Assessment Report

9 Solution: Attack Global Dimming and Global Warming together Reductions of particulates recently show brightening affect. Reductions of particulates recently show brightening affect. Leads to more apparent global warming consequences.Leads to more apparent global warming consequences. Temp increase in wake of 9/11Temp increase in wake of 9/11 1.1°C in 3 days 1.1°C in 3 days Global effort Global effort CO 2 sequestrationCO 2 sequestration RenewablesRenewables Algae farmsAlgae farms

10 Questions??


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