Shortwave cloud warming effect observed over highly reflective Greenland  

基于观测的格陵兰岛高反照率区域云短波辐射强迫增暖效应

作　　者：Haotian Zhang Chuanfeng Zhao Jing Li Yan Yu Annan Chen Yikun Yang Yan Xia Jie Yang Yue Sun Yulei Chi Xin Zhao Yuan Wang Jianping Huang 张昊天;赵传峰;李婧;俞妍;陈安南;杨以坤;夏炎;杨杰;孙悦;迟雨蕾;赵辛;Yuan Wang;黄建平

机构地区：[1]Department of Atmospheric and Oceanic Sciences,School of Physics,Peking University,Beijing 100871,China [2]Institute of Carbon Neutrality,Peking University,Beijing 100871,China [3]School of Systems Science,Beijing Normal University,Beijing 100875,China [4]Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China [5]School of Atmospheric Physics,Nanjing University of Information Science&Technology,Nanjing 210044,China [6]Department of Earth System Science,Stanford University,Palo Alto,CA 94305,USA [7]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China

出　　处：《Science Bulletin》2025年第6期951-959,共9页科学通报(英文版)

基　　金：supported by the National Natural Science Foundation of China(41925022,91837204,and 41975023);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19070202).

摘　　要：Clouds significantly influence the Earth’s energy budget,typically exerting a net global cooling effect by balancing shortwave radiation shading and longwave radiation trapping.However,here we report a shortwave warming effect by clouds over Greenland,contrary to the conventional belief of a cooling effect.We find that the shortwave cloud warming effect on the Earth-atmosphere system is particularly prominent for optically thin clouds.Utilizing satellite-based observations over Greenland during the summer season from 2013 to 2022,we identify a positive shortwave cloud radiative effect when the ratio of surface albedo to top-of-atmosphere(TOA)reflectivity reaches a critical threshold,implying that cloud-induced warming can occur in any place when the surface is bright enough compared with TOA.The shortwave warming effect(with radiative effect up to 25 W/m^(2))over Greenland is primarily concentrated in the peripheries and southern margins—regions experiencing the most intense ice melt.From a global perspective,these warming clouds can contribute up to 0.36 W/m^(2)to the summer Earth-atmosphere system in the Northern Hemisphere.These findings are critical for understanding the radiation budget in the polar regions,improving predictions of polar ice melt,and enhancing our comprehension of the Earth’s energy budget.

关 键 词：CLOUD Cloudradiativeeffect GREENLAND Earth’senergybudget 

分 类 号：P426.6[天文地球—大气科学及气象学]