Evolution of land surface air temperature trend
Evolution of land surface air temperature trend
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DOI：
10.1038/nclimate2223
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发表时间：
2014-06-01
影响因子：
30.7
通讯作者：
Chassignet, Eric P.
中科院分区：
文献类型：
--
作者：
Ji, Fei;Wu, Zhaohua;Chassignet, Eric P.
在过去的一个世纪中，全球气候以前所未有的速度经历了显着变暖(1,2)。这种变暖在空间和时间上是不均匀的，我们需要了解其演变，以更好地评估其潜在的社会和经济影响。在此，利用时空多维系综经验模态分解方法（3）诊断了近百年来全球陆地表面气温趋势的演变。我们发现，全球陆地上开始出现明显的变暖（>0.5 K），并在 1980 年左右加速。此后变暖速度和空间结构几乎没有变化。近几十年来最快的变暖（每十年>0.4 K）发生在北部中纬度地区。从纬向平均来看，显着变暖（自1900年以来>0.2 K）首先出现在北半球副热带和副极地地区，其次是南半球副热带变暖。 1950年至1985年间，北半球的两条暖化带不断扩大，并合并覆盖整个北半球。
The global climate has been experiencing significant warming at an unprecedented pace in the past century(1,2). This warming is spatially and temporally non-uniform, and one needs to understand its evolution to better evaluate its potential societal and economic impact. Here, the evolution of global land surface air temperature trend in the past century is diagnosed using the spatial-temporally multidimensional ensemble empirical mode decomposition method(3). We find that the noticeable warming (>0.5 K) started sporadically over the global land and accelerated until around 1980. Both the warming rate and spatial structure have changed little since. The fastest warming in recent decades (>0.4 K per decade) occurred in northern mid-latitudes. From a zonal average perspective, noticeable warming (>0.2 K since 1900) first took place in the subtropical and subpolar regions of the Northern Hemisphere, followed by subtropical warming in the Southern Hemisphere. The two bands of warming in the Northern Hemisphere expanded from 1950 to 1985 and merged to cover the entire Northern Hemisphere.