The Influence of Climate Feedbacks on Regional Hydrological Changes Under Global Warming

The Influence of Climate Feedbacks on Regional Hydrological Changes Under Global Warming
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全球变暖下气候反馈对区域水文变化的影响

DOI:
10.1029/2023gl106648
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发表时间:
2024
影响因子:
5.2
通讯作者:
Roe, Gerard H.
Roe, Gerard H.
中科院分区:
地球科学1区
文献类型:
--
作者:
Bonan, David B.;Feldl, Nicole;Siler, Nicholas;Kay, Jennifer E.;Armour, Kyle C.;Eisenman, Ian;Roe, Gerard H.

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气候反馈对气候变暖下区域水文变化的影响知之甚少。在这里,一个带有Hadley Cell参数化的湿能量平衡模式(MEBM)被用来隔离气候反馈对温室气体强迫下纬向平均降水减蒸发(P−E)变化的影响。结果表明,云反馈作用使热带P-E谱带变窄,热带深部P-E谱带增加。表面反馈移动了最大热带P-E的位置,并增加了极地地区的P-E。与反馈相关的P-E变化的模式间传播主要来自云反馈,而直减率和表面反射反馈在极地地区起着重要作用。MEBM中与云反馈锁定相关的P − E变化与云反馈不活跃的气候模式相似。这项工作突出了气候反馈在导致偏离“湿变湿,干变干”范式方面发挥的独特作用。
The influence of climate feedbacks on regional hydrological changes under warming is poorly understood. Here, a moist energy balance model (MEBM) with a Hadley Cell parameterization is used to isolate the influence of climate feedbacks on changes in zonal‐mean precipitation‐minus‐evaporation (P−E) under greenhouse‐gas forcing. It is shown that cloud feedbacks act to narrow bands of tropicalP−Eand increaseP−Ein the deep tropics. The surface‐albedo feedback shifts the location of maximum tropicalP−Eand increasesP−Ein the polar regions. The intermodel spread in theP−Echanges associated with feedbacks arises mainly from cloud feedbacks, with the lapse‐rate and surface‐albedo feedbacks playing important roles in the polar regions. TheP−Echange associated with cloud feedback locking in the MEBM is similar to that of a climate model with inactive cloud feedbacks. This work highlights the unique role that climate feedbacks play in causing deviations from the “wet‐gets‐wetter, dry‐gets‐drier” paradigm.
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发表时间: 2020-07
影响因子: 5.2
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DOI: --
发表时间: 2018
期刊: Journal of Climate
影响因子: 4.9
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