Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6-Reference-Cited by-同舟云学术

Comparison of Clouds and Cloud Feedback between AMIP5 and AMIP6

Published:2023-06-04 Issue:6 Volume:14 Page:978
ISSN:2073-4433
Container-title:Atmosphere
language:en
Short-container-title:Atmosphere

Author:

Zhang Yuanchong¹²,Jin Zhonghai²,Ottaviani Matteo²³

Affiliation:

1. Business Integra Inc., 2880 Broadway, New York, NY 10025, USA

2. NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USA

3. Terra Research Inc., Hoboken, NJ 07030, USA

Abstract

We examine the changes in clouds and cloud feedback between Phase 5 (AMIP5) and Phase 6 (AMIP6) of the Atmospheric Model Intercomparison Project. Each model is perturbed by uniformly increasing the sea surface temperature by 4 K. The simulated cloud fraction, the perturbed states and cloud radiative kernels are used to derive cloud feedback in the shortwave (SW), longwave (LW) and their sum (Net). Compared to AMIP5, the cloud fraction in AMIP6 increases by 9.1%, while the perturbation leads to a 0.25% decrease. The Net cloud feedback at the top of the atmosphere (TOA) is almost double (174%). Statistical tests support that this change is mainly due to an increase in the surface SW cloud feedback caused by optically thick, middle and low clouds. The contribution of the atmospheric Net component (12%) stems from the increase in the atmospheric LW cloud feedback, likely to play a role in weakening (strengthening) the northward (southward) meridional atmospheric energy transport, while the opposite is true for the surface LW and Net cloud feedback in the meridional oceanic energy transport. The substantial increase in cloud feedback at the TOA primarily contributes to the higher climate sensitivity. The cloud feedback spread in AMIP6 is comparable to that in AMIP5.

Funder

NASA MAP program

NASA IDS program

Publisher

MDPI AG

Subject

Atmospheric Science,Environmental Science (miscellaneous)

Link

https://www.mdpi.com/2073-4433/14/6/978/pdf

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