Stratospheric water vapor feedback
Stratospheric water vapor feedback
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DOI：
10.1073/pnas.1310344110
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发表时间：
2013-11-05
影响因子：
11.1
通讯作者：
Rosenlof, K. H.
中科院分区：
文献类型：
--
作者：
Dessler, A. E.;Schoeberl, M. R.;Rosenlof, K. H.
我们在这里表明，平流层水汽的变化在我们的气候演变中起着重要的作用。这来自对观测结果的分析，表明平流层水汽随着对流层温度的增加而增加，这意味着平流层水汽反馈的存在。我们估计在化学-气候模式中这种反馈的强度为+ 0.3 W/（m（2）.K），这将是整体气候敏感性的重要贡献者。这种反馈的三分之一来自通过热带对流层顶进入平流层的水汽增加，其余的来自通过热带对流层顶外进入的水汽增加。
We show here that stratospheric water vapor variations play an important role in the evolution of our climate. This comes from analysis of observations showing that stratospheric water vapor increases with tropospheric temperature, implying the existence of a stratospheric water vapor feedback. We estimate the strength of this feedback in a chemistry- climate model to be + 0.3 W/( m(2).K), which would be a significant contributor to the overall climate sensitivity. One- third of this feedback comes from increases in water vapor entering the stratosphere through the tropical tropopause layer, with the rest coming from increases in water vapor entering through the extratropical tropopause.