本文選題：北極 + 海冰密集度��； 參考：《中國海洋大學(xué)》2014年碩士論文

【摘要】：海冰是極地氣候重要組成部分。衛(wèi)星遙感技術(shù)的應(yīng)用也使得對海冰大尺度，長時(shí)間序列的研究成為可能。衛(wèi)星數(shù)據(jù)顯示，近年來北極海冰覆蓋急劇下降。本文采用1982-2004年NOAA/AVHRR反照率，，海表溫度數(shù)據(jù)和Nimbus-7/SMMR，DMSP/SSM/I海冰密集度數(shù)據(jù)進(jìn)行討論分析。選取了七個(gè)北極海域，分別位于格陵蘭海（海域A）、巴倫支海（海域B）、喀拉海（海域C）、拉普捷夫海（海域D）、東西伯利亞海及其鄰近海域（海域E）、楚科奇海及其鄰近海域（海域F）和波弗特海及其鄰近海域（海域G），對北極海冰長期變化進(jìn)行了研究。 格陵蘭海域和巴倫支海域夏季反照率,海冰密集度較低，多為無冰海面；喀拉海域、拉普捷夫海域、東西伯利亞海及其鄰近海域六月份反照率,海冰密集度較高，七、八月份海冰加速融化，海冰密集度下降明顯；楚科奇海和波弗特海及其鄰近海域夏季反照率、海冰密集度較高。反照率與海冰密集度的夏季區(qū)域平均序列相關(guān)性比較高，最低相關(guān)系數(shù)為0.51，最高相關(guān)系數(shù)為0.94。分析23年夏季海表溫度和海冰密集度的時(shí)間序列發(fā)現(xiàn)，不同海域不同月份呈現(xiàn)出不同相關(guān)性。 1982-2004年,七個(gè)海域反照率和海冰密集度均呈現(xiàn)下降趨勢，西部的楚科奇海和波弗特海及其鄰近海域下降速度最快，巴倫支海域下降速度最慢。海域E、海域F和海域G海表溫度呈現(xiàn)上升趨勢；海域B和海域D海溫呈現(xiàn)下降趨勢，且海域B較海域D下降速度快；海域A和海域C海表溫度變化趨勢不明顯。 海表溫度和海冰密集度數(shù)據(jù)主成分分析結(jié)果顯示，1982-2004年七個(gè)海域海冰密集度第一模態(tài)均呈現(xiàn)下降趨勢。海域B和海域D海表溫度第一模態(tài)時(shí)間序列均呈現(xiàn)下降趨勢，海域E、海域F和海域G呈現(xiàn)上升趨勢，海域A和海域C變化趨勢不明顯。與區(qū)域月平均序列變化趨勢一致。對海表溫度和海冰密集度第一模態(tài)時(shí)間序列進(jìn)行傅里葉頻譜和小波頻譜分析，結(jié)果顯示均存在顯著地年際變化。
[Abstract]:Sea ice is an important component of polar climate. The application of satellite remote sensing technology also makes it possible to study the large-scale and long-time series of sea ice. Satellite data show a sharp decline in Arctic sea ice cover in recent years. In this paper, NOAA/AVHRR albedo, sea surface temperature data and Nimbus-7 / SMMR-DMSPSPSSM / I sea ice density data from 1982 to 2004 are used for discussion and analysis. Seven Arctic waters were selected, Located in the Greenland Sea (Agnes), the Barents Sea (Bu), the Kera Sea (sea area Che, the Sea of Laptev), the East Siberian Sea and its adjacent sea areas (sea area Epium, the Chukchi Sea and its adjacent waters (Sea F) and Beaufort), respectively. The long-term variation of Arctic sea ice is studied. The summer albedo in Greenland and Barents Sea area is relatively low, mostly ice-free sea level; in Kera Sea area, Laptev Sea area, East Siberian Sea area and its adjacent sea area, the albedo is high in June, and the sea ice density is high, 7. In August, the sea ice melting accelerated, the sea ice density decreased obviously, and the sea ice density was higher in the Chukchi Sea, Beaufort Sea and its adjacent waters in summer. The correlation between albedo and the summer mean sequence of sea ice concentration is relatively high, the lowest correlation coefficient is 0.51and the highest correlation coefficient is 0.94. By analyzing the time series of sea surface temperature and sea ice density in 23 years, it is found that different sea areas show different correlations in different months. From 1982 to 2004, the albedo and sea ice density of the seven sea areas all showed a downward trend. The western Chukchi Sea, Beaufort Sea and its adjacent sea areas declined the fastest, and the Barents Sea region the slowest. Sea area E, sea area F and sea area G showed an upward trend, sea area B and sea area D showed a downward trend, and sea area B decreased faster than sea D, and sea area A and C showed no obvious trend of change of sea surface temperature. The principal component analysis results of sea surface temperature and sea ice concentration data show that the first modes of sea ice concentration in seven sea areas from 1982 to 2004 all show a downward trend. The first mode time series of sea surface temperature in sea area B and D showed a downward trend, while in sea area E, F and G showed an upward trend, but the variation trend of sea area A and C was not obvious. The trend is consistent with the regional average monthly sequence. The first mode time series of sea surface temperature and sea ice density are analyzed by Fourier spectrum and wavelet spectrum. The results show that there are significant interannual variations in the first mode time series of sea surface temperature and sea ice concentration.
【學(xué)位授予單位】：中國海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731.15

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 武炳義,黃榮輝,高登義;北極海冰的厚度和面積變化對大氣環(huán)流影響的數(shù)值模擬[J];氣象學(xué)報(bào);2001年04期

2 汪代維,楊修群;北極海冰變化的時(shí)間和空間型[J];氣象學(xué)報(bào);2002年02期

3 劉成龍;趙進(jìn)平;;夏季北極密集冰區(qū)范圍確定及其時(shí)空變化研究[J];海洋學(xué)報(bào)(中文版);2013年04期

本文編號(hào)：1903089