Spring snow cover extent reductions in the 2008-2012 period exceeding climate model projections
Spring snow cover extent reductions in the 2008-2012 period exceeding climate model projections
复制标题
DOI：
10.1029/2012gl053387
复制
发表时间：
2012-10-10
影响因子：
5.2
通讯作者：
Brown, R.
中科院分区：
文献类型：
--
作者：
Derksen, C.;Brown, R.
根据NOAA雪图气候数据记录（CDR）对4月至6月期间（积雪主要位于北极上空）北方半球春季陆地积雪覆盖范围（SCE）的分析表明，5月和6月SCE在统计上显著减少。自2008年以来，欧亚大陆每年都创下6月最低SCE的连续纪录，北美在过去5年中有3年创下纪录。1979年至2011年6月积雪覆盖范围的损失率（-17.8%decade（-1））大于同期9月海冰范围的损失率（-10.6%decade（-1））。对耦合模式相互比较项目第5阶段（CMIP 5）模式输出的分析表明，自2005年以来观察到的6月SCE的显著减少低于由多模式集合平均值+/-1标准差定义的模式共识区。引文：Derksen，C.，和R.布朗（2012年），2008-2012年春季积雪覆盖范围减少超过气候模型预测，地球物理学。保留信函：39，L19504，doi：10.1029/2012GL053387。
Analysis of Northern Hemisphere spring terrestrial snow cover extent (SCE) from the NOAA snow chart Climate Data Record (CDR) for the April to June period (when snow cover is mainly located over the Arctic) has revealed statistically significant reductions in May and June SCE. Successive records for the lowest June SCE have been set each year for Eurasia since 2008, and in 3 of the past 5 years for North America. The rate of loss of June snow cover extent between 1979 and 2011 (-17.8% decade(-1)) is greater than the loss of September sea ice extent (-10.6% decade(-1)) over the same period. Analysis of Coupled Model Intercomparison Project Phase 5 (CMIP5) model output shows the marked reductions in June SCE observed since 2005 fall below the zone of model consensus defined by +/-1 standard deviation from the multi-model ensemble mean. Citation: Derksen, C., and R. Brown (2012), Spring snow cover extent reductions in the 2008-2012 period exceeding climate model projections, Geophys. Res. Lett., 39, L19504, doi:10.1029/2012GL053387.