Impacts of snow cover on vegetation phenology in the arctic from satellite data
Impacts of snow cover on vegetation phenology in the arctic from satellite data
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卫星数据显示积雪对北极植被物候的影响
DOI：
10.1007/s00376-012-2173-x
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发表时间：
2013-08
影响因子：
5.8
通讯作者：
Jia Gensuo
中科院分区：
文献类型：
--
作者：
Zeng Heqing;Jia Gensuo
积雪动态被认为是北极苔原和其他北方生物群落物候变化的一个重要因素。中分辨率成像光谱仪（MODIS）/Terra卫星数据被选中，以监测植被物候的时空异质性和积雪的时间在北极俄罗斯西部（亚马尔半岛）在2000年至2010年期间。植被物候和积雪覆盖的时间变化的幅度是高度异质性的纬度梯度和植被类型在俄罗斯北极西部。“季节开始”（SOS）的纬度梯度相同（r2= 0.982，p < 0.0001），“赛季结束”（EOS）（r ~ 2 = 0.938，p < 0.0001）和“积雪最后一天”（LSC）（r2= 0.984，p < 0.0001），而纬度梯度与“积雪首日”（FSC）的相关性较弱（r2= 0.48，p < 0.0042）。南半球SOS和FSC延迟，EOS和LSC提前，而北半球则完全不同。不同土地覆盖特征的SOS对积雪的响应不同，而不同植被类型的EOS对降雪的响应几乎相同。积雪覆盖的时间可能是北极苔原植被物候动态背后的一个关键驱动因素。目前的研究表明，积雪迫切需要更多的关注，以促进了解植被物候在未来。
The dynamics of snow cover is considered an essential factor in phenological changes in Arctic tundra and other northern biomes. The Moderate Resolution Imaging Spectroradiometer (MODIS)/Terra satellite data were selected to monitor the spatial and temporal heterogeneity of vegetation phenology and the timing of snow cover in western Arctic Russia (the Yamal Peninsula) during the period 2000–10. The magnitude of changes in vegetation phenology and the timing of snow cover were highly heterogeneous across latitudinal gradients and vegetation types in western Arctic Russia. There were identical latitudinal gradients for “start of season” (SOS) (r2= 0.982,p< 0.0001), “end of season” (EOS) (r2= 0.938,p< 0.0001), and “last day of snow cover” (LSC) (r2= 0.984,p< 0.0001), while slightly weaker relationships between latitudinal gradients and “first day of snow cover” (FSC) were observed (r2= 0.48,p< 0.0042). Delayed SOS and FSC, and advanced EOS and LSC were found in the south of the region, while there were completely different shifts in the north. SOS for the various land cover features responded to snow cover differently, while EOS among different vegetation types responded to snowfall almost the same. The timing of snow cover is likely a key driving factor behind the dynamics of vegetation phenology over the Arctic tundra. The present study suggests that snow cover urgently needs more attention to advance understanding of vegetation phenology in the future.
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DOI：
10.1007/978-90-481-9118-5
发表时间：
2011
期刊：
--
影响因子：
--
作者：
G. Gutman;A. Reissell
通讯作者：
G. Gutman;A. Reissell
影响因子：
--
作者：
S. Oberbauer;G. Starr;Eric W. Pop
通讯作者：
S. Oberbauer;G. Starr;Eric W. Pop
影响因子：
25.2
作者：
Tingjun Zhang
通讯作者：
Tingjun Zhang
影响因子：
1.2
作者：
Brown, RD;Brasnett, B;Robinson, D
通讯作者：
Robinson, D
影响因子：
18.3
作者：
M. Cane
通讯作者：
M. Cane