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Dust Radiative Effects on Climate by Glaciating Mixed‐Phase Clouds
Author(s) -
Shi Yang,
Liu Xiaohong
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082504
Subject(s) - longwave , radiative forcing , atmospheric sciences , ice nucleus , environmental science , mixed phase , radiative transfer , shortwave , northern hemisphere , cloud physics , forcing (mathematics) , middle latitudes , climatology , southern hemisphere , climate model , nucleation , arctic , phase (matter) , climate change , meteorology , cloud computing , geology , physics , aerosol , quantum mechanics , oceanography , computer science , thermodynamics , operating system
Mineral dust plays an important role in the primary formation of ice crystals in mixed‐phase clouds by acting as ice nucleating particles (INPs). It can influence the cloud phase transition and radiative forcing of mixed‐phase clouds, both of which are crucial to global energy budget and climate. In this study, we investigate the dust indirect effects on mixed‐phase clouds through heterogeneous ice nucleation with the U.S. Department of Energy (DOE) Energy Exascale Earth System Model (E3SM). Dust and INP concentrations simulated from two versions of E3SM with three ice nucleation parameterizations were evaluated against observations in the Northern Hemisphere. Constrained by these observations, E3SM shows that dust INPs induce a global mean net cloud radiative effect of 0.05 to 0.26 W/m 2 with the predominant warming appearing in the Northern Hemisphere midlatitudes. However, a cooling effect is found in the Arctic due to reduced longwave cloud forcing.