Global Temperature Change Summary

Global surface temperature has continuously increased approx. 0.2°C per decade in the past 30 years. The main climate forcing is claimed to be the dominance of greenhouse gases (GHG). These gasses have caused the ice-snow albedo to decrease and alter the responses of the ocean and land. Dangerous anthropogenic interference with climate has led to the sensitivity for the doubled CO2 referring sea ice, snow, water vapor, and clouds as feedbacks; and ice sheet area, vegetation cover, and non-H2O GHGs as forcings.
The Ice sheet areas decrease in area and their sensitivity to temperature changes is accounted for practically the entire global temperature change. Also, vegetation has begun covering the pole ward in the Northern Hemisphere causing a positive climate feedback. This can lead to increase of GHGs because of the melting permafrost. ”Some of the largest warmings in the Earth’s history and mass extinction may be associated with such GHG releases.” It was suggested that if global warming was not limited to <1°C, feedbacks may add to emissions of CO2, CH4, N2O, 03 and create a different planet ice-free of the Arctic.
Global warming is expected to slow the mean tropical circulation and the longitude winds by approx 3.5%. This relaxed longitude wind would reduce the temperature found within the Western Equatorial Pacific (WEP) and the Eastern Equatorial Pacific (EEP). This alteration could result to the different strengths found within El Niños, a complex series of climatic changes affecting the Pacific regions.