1.Sea Ice and Snow cover -Evidences As they melt mountain glaciers leave behind the an altered landscape with low albedo. a. shrinking glacial are around.
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Presentation on theme: "1.Sea Ice and Snow cover -Evidences As they melt mountain glaciers leave behind the an altered landscape with low albedo. a. shrinking glacial are around."— Presentation transcript:
1.Sea Ice and Snow cover -Evidences As they melt mountain glaciers leave behind the an altered landscape with low albedo. a. shrinking glacial are around the globe Montana glacier national park 1913 2005
b. Polar ice is melting Both floating ice and continental ice sheets of Greenland and Antarctica. 1992 2002
c. Arctic and Antarctic the extent of ice cover is shrinking. Arctic Sea Ice Extent: Average for March Arctic Sea Ice Extent: Average for August
Impacts of Loss of sea ice. It affects the ecology and endangers wild life such as polar bear and seals Affects the indigenous peoples of the Arctic. Melting sea ice floods the ocean with the fresh water who’s lower density can alter large –scale ocean circulation. Melted ice leaves dark sea water, which absorbs more solar radiation resulting in Ice-albedo feedback. Melting land base ice causes the sea level to rise
2.Seasonal temperature change. Global temperature increases aren’t spread evenly around the globe. Arctic warming over the past hundred years is about twice the 0.74 ° C. But Arctic winter temperatures have increased as much as 3 ° to 4° C. Heat wave and extreme cold. Decrease in number of extreme cold days, thereby lengthening the season. Increases in number of extreme hot days.
3.Weather changes Increase temperature can cause more precipitation. Precipitations increases more in the mid- latitudes than tropics and subtropics. Increases the power of the tropical storm. El- Nino ( A warming n the eastern pacific that affects the global weather)could change in frequency and intensity.
4.Species Ranges Species move northward and upward every decade. Breeding,nesting flowering budburst are happening earlier in some species.