Change in winter snow depth and its impacts on vegetation in China
Change in winter snow depth and its impacts on vegetation in China
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中国冬季积雪深度变化及其对植被的影响
DOI：
10.1111/j.1365-2486.2010.02210.x
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发表时间：
2010-11
影响因子：
11.6
通讯作者：
Wang, Xuhui
中科院分区：
文献类型：
--
作者：
Peng, Shushi;Piao, Shilong;Ciais, Philippe;Fang, Jingyun;Wang, Xuhui
陆地积雪是全球气候系统的一个重要组成部分，但我们对其变化对植被影响的了解有限，特别是在温带地区。本文利用中国279个气象站的逐日积雪深度资料，研究了1980 - 2005年冬季积雪深度（12 - 2月）的分布及其对植被生长的影响。积雪深度趋势显示出强烈的地理异质性。在40°N以北（如东北、内蒙古和西北），冬季最大和平均雪深都有增加的趋势（>0.01 cm yr−1）。 在40°N以南，特别是中国中部和东部，观测到下降趋势（<-0.01 cm yr-1）。 研究了几种生态系统类型的积雪深度变化对植被生长的影响。在沙漠中，平均冬季积雪深度与生长季节早期（5月和6月）和中期（7月和8月）的NDVI显著正相关，这表明冬季积雪在调节沙漠植被生长方面起着关键作用，最有可能是通过对土壤水分的持续影响。在草原上，5 - 6月冬季积雪深度与NDVI也呈显著正相关。然而，在森林、灌木丛、高山草甸和苔原中，没有发现这种相关性。植被生长对冬季雪深的这些生态系统特定响应可能是由于温度和降雨等生长环境条件的差异造成的。
Snow on land is an important component of the global climate system, but our knowledge about the effects of its changes on vegetation are limited, particularly in temperate regions. In this study, we use daily snow depth data from 279 meteorological stations across China to investigate the distribution of winter snow depth (December–February) from 1980 to 2005 and its impact on vegetation growth, here approximated by satellite‐derived vegetation greenness index observations [Normalized Difference Vegetation Index (NDVI)]. The snow depth trends show strong geographical heterogeneities. An increasing trend (>0.01 cm yr−1) in maximum and mean winter snow depth is found north of 40°N (e.g. Northeast China, Inner Mongolia, and Northwest China). A declining trend (<−0.01 cm yr−1) is observed south of 40°N, particularly over Central and East China. The effect of changes in snow depth on vegetation growth was examined for several ecosystem types. In deserts, mean winter snow depth is significantly and positively correlated with NDVI during both early (May and June) and mid‐growing seasons (July and August), suggesting that winter snow plays a critical role in regulating desert vegetation growth, most likely through persistent effects on soil moisture. In grasslands, there is also a significant positive correlation between winter snow depth and NDVI in the period May–June. However, in forests, shrublands, and alpine meadow and tundra, no such correlation is found. These ecosystem‐specific responses of vegetation growth to winter snow depth may be due to differences in growing environmental conditions such as temperature and rainfall.
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影响因子：
3.2
作者：
Changchun Xu;Yaning Chen;Yimit Hamid;T. Tashpolat;Yapeng Chen;Hongtao Ge;Weihong Li
通讯作者：
Changchun Xu;Yaning Chen;Yimit Hamid;T. Tashpolat;Yapeng Chen;Hongtao Ge;Weihong Li
影响因子：
4.9
作者：
Qin Dahe;Liu Shiyin;Li Peiji
通讯作者：
Li Peiji
影响因子：
2.5
作者：
Freppaz, Michele;Celi, Luisella;Zanini, Ermanno
通讯作者：
Zanini, Ermanno
DOI：
--
发表时间：
2001
期刊：
Journal of Desert Research
影响因子：
--
作者：
Wu Wei
通讯作者：
Wu Wei
影响因子：
--
作者：
X. Zou;P. Zhai
通讯作者：
X. Zou;P. Zhai