2003-2010年青藏高原积雪及雪水当量的时空变化

doi:10.7522/j.issn.1000-0240.2014.0160

冰川冻土 ›› 2014, Vol. 36 ›› Issue (6): 1337-1344.doi: 10.7522/j.issn.1000-0240.2014.0160

• 冰冻圈与全球变化 • 下一篇

2003-2010年青藏高原积雪及雪水当量的时空变化

孙燕华¹, 黄晓东¹, 王玮¹, 冯琦胜¹, 李红星², 梁天刚¹

1. 兰州大学草地农业科技学院草地农业生态系统国家重点实验室, 甘肃兰州 730020;
2. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000

收稿日期:2014-05-07 修回日期:2014-09-16 出版日期:2014-12-25 发布日期:2015-01-20
通讯作者: 黄晓东, E-mail: huangxd@lzu.edu.cn E-mail:huangxd@lzu.edu.cn
作者简介:孙燕华(1991-),女,甘肃民乐人,2013年毕业于甘肃农业大学,现为兰州大学在读硕士研究生,主要从事积雪遥感研究.E-mail:sunyh179@163.com
基金资助:
国家重点基础研究发展计划(973计划)项目(2013CBA01802); 国家自然科学基金项目(41101337; 41001197; 31372367)资助

Spatio-temporal changes of snow cover and snow water equivalent in the Tibetan Plateau during 2003-2010

SUN Yanhua¹, HUANG Xiaodong¹, WANG Wei¹, FENG Qisheng¹, LI Hongxing², LIANG Tiangang¹

1. State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2014-05-07 Revised:2014-09-16 Online:2014-12-25 Published:2015-01-20

摘要/Abstract

摘要：

利用MODIS逐日无云积雪产品与AMSR-E雪水当量产品进行融合, 获取了青藏高原500 m分辨率的高精度雪水当量产品, 通过研究青藏高原积雪时空动态变化特征, 分析了积雪覆盖日数、雪水当量以及总雪量的季节及年际变化. 结果表明: 青藏高原地区降雪主要集中在高海拔山区, 而高原腹地降雪较少, 降雪在空间上分布极为不均; 2003-2010年期间, 平均积雪日数呈显著减少趋势, 稳定积雪区面积在逐渐扩大, 常年积雪区面积在不断缩小. 与积雪日数时空变化相比, 雪水当量增加的区域与积雪日数增加的区域基本一致, 但喜马拉雅山脉在积雪日数减少的情况下雪水当量却在逐年增加, 表明该地区温度升高虽然导致部分常年积雪向季节性积雪过渡, 但降雪量却在增加. 总的积雪面积年际变化呈波动下降的趋势, 但趋势不显著, 且减少的比例很少. 最大积雪面积呈现波动上升后下降的趋势, 平均累积积雪总量呈明显的波动下降趋势, 年递减率为1.0×10³ m³·a^-1.

关键词: MODIS, 积雪面积, 雪水当量, 青藏高原

Abstract:

In this study, the MODIS daily snow products without cloud contamination and AMSR-E snow water equivalent products were integrated to get snow water equivalent products of 500 m resolution in the Tibetan Plateau. Then these products were used to analyze the spatial-temporal changes of snow cover over the plateau during 2003-2010. The results showed that snow had accumulated mainly in the high mountains, with a little in the hinterland of the plateau. The snowfall had showed a very unevenly distribution spatially. The average snow-covered days (SCD) had showed a significant decreasing trend, the stable snow cover area had increased and the perennial snow cover area had shrunk during 2003-2010. The increasing regions of snow water equivalent (SWE) was similar to those of SCD, but in the Himalayas. In the Himalayas, the SCD had decreased but the SWE had increased, which mainly caused by more snowfall in winter. The overall snow-covered area (SCA) had showed a fluctuating deceasing trend, but not so significant and the decreasing proportion was very small. In contrast, the maximum of SCA had showed an increasing trend during 2003-2008 and then decreasing. The snow mass had showed a significant decreasing trend over the plateau during 2003-2010, with an annual decreasing rate of 1.0×10³ m³·a^-1.

Key words: MODIS, snow-cover area, snow water equivalent, Tibetan Plateau

中图分类号:

P343.6

孙燕华, 黄晓东, 王玮, 冯琦胜, 李红星, 梁天刚. 2003-2010年青藏高原积雪及雪水当量的时空变化[J]. 冰川冻土, 2014, 36(6): 1337-1344.

SUN Yanhua, HUANG Xiaodong, WANG Wei, FENG Qisheng, LI Hongxing, LIANG Tiangang. Spatio-temporal changes of snow cover and snow water equivalent in the Tibetan Plateau during 2003-2010[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2014, 36(6): 1337-1344.

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2003-2010年青藏高原积雪及雪水当量的时空变化

Spatio-temporal changes of snow cover and snow water equivalent in the Tibetan Plateau during 2003-2010

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