Arctic ice sheet melting ….its effects on global warming

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Arctic ice sheet melting .its effects on global warming. Atreyee Bhattacharya EPS 131. Overview of the talk. Why should be study the Arctic? How do we study the melting of arctic sea ice The findings of the study Conclusions and predictions. Decreasing albedo - PowerPoint PPT Presentation


<ul><li><p>Arctic ice sheet melting.its effects on global warmingAtreyee Bhattacharya</p><p>EPS 131</p></li><li><p>Overview of the talk Why should be study the Arctic?</p><p>How do we study the melting of arctic sea ice</p><p>The findings of the study</p><p>Conclusions and predictions</p></li><li><p>..the ignored danger!Decreasing albedo</p><p>Warmer oceans &amp; warmer atmosphere</p><p>Ice sheet melting </p><p>Fresh water deluge</p><p>Shutdown of thermohaline circulation</p><p>Drastic cooling</p></li><li><p>The decay rateImage NOAA</p></li><li><p>How fast Is the ice melting(using ice drafts)How do we know that the arctic ice sheet has dwindled?Answer) Ice drafts</p><p> 3 m 2 m~ volume is down by some 40%.~ area shrunk by 6%</p><p>SCICEX data,1999Rothrock et al 1999</p></li><li><p>The ice is melting probably because multi-decadal cycle ? OR continue the observed decline? Answer : Greenhouse gas concentration!!</p></li><li><p>Effects on ecology and mankind1.Changes in migration patterns and habitat of terrestrial and marine mammals. 2.Changes in the availability of food resources for sea birds and marine life.3. Changes in storm surges, shore erosion, and wind. ..implies recent effects as observed in 19964. Changes in precipitation in the summer, fall, and winter ..implies drying up of traditional food5. A reduction in sea-ice and changes in the timing of ice formation and thaw in the Bering and Chukchi Seas. implies the poor hunting during 1997 and 1998</p></li><li><p>References1. Arctic Sea-Ice: Changes, Causes, and Implications USGCRP Seminar, 20 April 19992. 6.Ecology.com3. NOOA4. Ohio State University Department of Mechanical Engineering, Science Daily.5. Rothrock. D.A., Yu. Y. ,&amp; Maykut. G.A.,; Thinning of the Arctic Sea-Ice Cover. Geophysical Research Letters, Vol. 26,No. 23, pages 3469-3472, December 1, 19996. US geological survey</p></li><li><p>Thank you!!Questions??</p></li></ul>


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