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The Arctic region remains surrounded by sea ice during most of the period of the year. In the Arctic Ocean the Northern Sea Route (NSR) has been used as an important route for shipping. The arctic sea ice is decreasing since 1979; hence needs to be monitored. In this research work sea ice concentration in the recent years and sea ice concentration anomalies of few months with long term sea ice concentration are studied. The climatology of long term ice concentration data from various satellites, and the recent sea ice concentration data from Advanced Microwave Scanning Radiometer 2 (AMSR2) were used. The results show that sea ice concentration and sea ice extent in the Arctic region decreased by around 5% from 2015 to 2016, but in 2017 increased again in smaller amount in some areas like around Novaya Zemlya, and parts of the sea in between Greenland and Longyearbyen, and around Banks Island. The percentages of sea ice area in NSR for July 7 in 2015 to 2017 were 37%, 39% and 33%, respectively, indicating a large area (around ten thousand km^2 ) become ice free in 2017 compared to the previous year.
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참고문헌 (9)
참고문헌 신청
Cavalieri, D. J. / 1997 / Observed hemispheric asymmetry in globalsea ice changes / Science 278:1104~1106
Imaoka, K. / 2010 / Instrument performance and calibration of AMSR-E and AMSR2, International Archives of the Photogrammetry / Remote Sensing and Spatial Information Science 38(8):13~18
Gade, H. G. / 1979 / Melting of ice in sea water: A primitive model with application to the Antarctic ice shelf and icebergs / Journal of Physical Oceanography 9(1):189~198
Parkinson, C. L. / 2013 / On the 2012 record low Arctic sea ice cover: Combined impact of preconditioning and an August storm / Geophysical Research Letters 40:1356~1361
Screen, J. A. / 2014 / Atmospheric impacts of Arctic sea-ice loss, 1979-2009:Separating forced change from atmospheric internal variability / Climate Dynamics 43(1-2):333~344
Imaoka, K. / 2010 / Instrument performance and calibration of AMSR-E and AMSR2, International Archives of the Photogrammetry / Remote Sensing and Spatial Information Science 38(8):13~18
Gade, H. G. / 1979 / Melting of ice in sea water: A primitive model with application to the Antarctic ice shelf and icebergs / Journal of Physical Oceanography 9(1):189~198
Parkinson, C. L. / 2013 / On the 2012 record low Arctic sea ice cover: Combined impact of preconditioning and an August storm / Geophysical Research Letters 40:1356~1361
Screen, J. A. / 2014 / Atmospheric impacts of Arctic sea-ice loss, 1979-2009:Separating forced change from atmospheric internal variability / Climate Dynamics 43(1-2):333~344
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