Opposite Responses of the Dry and Moist Eddy Heat Transport Into the Arctic in the PAMIP Experiments

Opposite Responses of the Dry and Moist Eddy Heat Transport Into the Arctic in the PAMIP Experiments
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PAMIP 实验中干湿涡流热传输到北极的相反响应

DOI:
10.1029/2020gl089990
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发表时间:
2021
影响因子:
5.2
通讯作者:
Lantao Sun
Lantao Sun
中科院分区:
地球科学1区
文献类型:
--
作者:
A. Audette;R. Fajber;P. Kushner;Yutian Wu;Y. Peings;G. Magnusdottir;R. Eade;M. Sigmond;Lantao Sun

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鉴于极区放大过程的不确定性,阐明向极的热量和水分输送的作用至关重要。极地放大模式相互比较项目(PAMIP)允许在气候变化的情况下将海冰损失的影响与海面变暖的影响分开。我们利用一个湿等熵环流框架,考虑水分输送,凝结和涡动输送,以分析连接中纬度和北极的环流。在PAMIP的大气环流模式实验中,规定的海冰损失通过加热高纬度地区返回的潮湿等熵环流来减少向极地的热输送(PHT),而规定的海洋表面变暖通过加强潮湿等熵环流来增加PHT。PHT向北极的模型间传播反映了海冰和表面变暖效应之间的拔河。
Given uncertainty in the processes involved in polar amplification, elucidating the role of poleward heat and moisture transport is crucial. The Polar Amplification Model Intercomparison Project (PAMIP) permits robust separation of the effects of sea ice loss from sea surface warming under climate change. We utilize a moist isentropic circulation framework that accounts for moisture transport, condensation, and eddy transport, in order to analyze the circulation connecting the mid‐latitudes and the Arctic. In PAMIP's atmospheric general circulation model experiments, prescribed sea ice loss reduces poleward heat transport (PHT) by warming the returning moist isentropic circulation at high latitudes, while prescribed warming of the ocean surface increases PHT by strengthening the moist isentropic circulation. Inter‐model spread of PHT into the Arctic reflects the tug‐of‐war between sea‐ice and surface‐warming effects.
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