Quantifying the importance of rapid adjustments for global precipitation changes

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Title: Quantifying the importance of rapid adjustments for global precipitation changes
Authors: Myhre, G
Kramer, RJ
Smith, CJ
Hodnebrog
Forster, P
Soden, BJ
Samset, BH
Stjern, CW
Andrews, T
Boucher, O
Faluvegi, G
Fläschner, D
Kasoar, M
Kirkevåg, A
Lamarque, JF
Olivié, D
Richardson, T
Shindell, D
Stier, P
Takemura, T
Voulgarakis, A
Watson-Parris, D
Item Type: Journal Article
Abstract: Different climate drivers influence precipitation in different ways. Here we use radiative kernels to understand the influence of rapid adjustment processes on precipitation in climate models. Rapid adjustments are generally triggered by the initial heating or cooling of the atmosphere from an external climate driver. For precipitation changes, rapid adjustments due to changes in temperature, water vapor, and clouds are most important. In this study we have investigated five climate drivers (CO2, CH4, solar irradiance, black carbon, and sulfate aerosols). The fast precipitation responses to a doubling of CO2 and a 10-fold increase in black carbon are found to be similar, despite very different instantaneous changes in the radiative cooling, individual rapid adjustments, and sensible heating. The model diversity in rapid adjustments is smaller for the experiment involving an increase in the solar irradiance compared to the other climate driver perturbations, and this is also seen in the precipitation changes.
Issue Date: 28-Oct-2018
Date of Acceptance: 12-Oct-2018
URI: http://hdl.handle.net/10044/1/64695
DOI: https://dx.doi.org/10.1029/2018GL079474
ISSN: 0094-8276
Publisher: Wiley
Start Page: 11399
End Page: 11405
Journal / Book Title: Geophysical Research Letters
Volume: 20
Issue: 20
Copyright Statement: ©2018 The Authors. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
Keywords: MD Multidisciplinary
Meteorology & Atmospheric Sciences
Publication Status: Published
Open Access location: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL079474
Online Publication Date: 2018-10-19
Appears in Collections:Space and Atmospheric Physics
Physics
Centre for Environmental Policy
Faculty of Natural Sciences



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