Yu Ling-Xue, Zhang Shu-Wen, Guan Cong, Yan Feng-Qin, Yang Chao-Bin, Bu Kun, Yang Jiu-Chun, Chang Li-Ping
Ying Yong Sheng Tai Xue Bao. 2014 Sep;25(9):2521-8.
This paper extracted and verified the snow cover extent in Heilongjiang Basin from 2003 to 2012 based on MODIS Aqua and Terra data, and the seasonal and interannual variations of snow cover extent were analyzed. The result showed that the double-star composite data reduced the effects of clouds and the overall accuracy was more than 91%, which could meet the research requirements. There existed significant seasonal variation of snow cover extent. The snow cover area was almost zero in July and August while in January it expanded to the maximum, which accounted for more than 80% of the basin. According to the analysis on the interannual variability of snow cover, the maximum winter snow cover areas in 2003-2004 and 2009-2010 (>180 x 10(4) km2) were higher than that of 2011 (150 x 10(4) km2). Meanwhile, there were certain correlations between the interannual fluctuations of snow cover and the changes of average annual temperature and precipitation. The year with the low snow cover was corresponding to less annual rainfall and higher average temperature, and vice versa. The spring snow cover showed a decreasing trend from 2003 to 2012, which was closely linked with decreasing precipitation and increasing temperature.
本文基于MODIS Aqua和Terra数据提取并验证了2003年至2012年黑龙江流域的积雪范围，并分析了积雪范围的季节和年际变化。结果表明，双星复合数据减少了云的影响，总体精度超过91%，能够满足研究要求。积雪范围存在显著的季节变化。7月和8月积雪面积几乎为零，而1月积雪面积扩大到最大，占流域面积的80%以上。根据积雪年际变化分析，2003 - 2004年和2009 - 2010年冬季最大积雪面积（>180×10⁴平方公里）高于2011年（150×10⁴平方公里）。同时，积雪的年际波动与年平均气温和降水量的变化存在一定的相关性。积雪量少的年份对应的年降水量少且平均气温高，反之亦然。2003年至2012年春季积雪呈减少趋势，这与降水量减少和气温升高密切相关。
