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New Observational Constraints on Warm Rain Processes and Their Climate Implications

Dong, Xiquan and Wu, Peng and Wang, Yuan and Xi, Baike and Huang, Yiyi (2021) New Observational Constraints on Warm Rain Processes and Their Climate Implications. Geophysical Research Letters, 48 (6). Art. No. e2020GL091836. ISSN 0094-8276. doi:10.1029/2020gl091836. https://resolver.caltech.edu/CaltechAUTHORS:20210503-085353785

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Abstract

Low stratiform clouds have profound impacts on the hydrological cycle and the Earth’s radiation budget. However, realistic simulation of low clouds in climate models presents a major challenge. Here we employ the newly retrieved cloud and drizzle microphysical properties to improve the autoconversion and accretion parameterizations in a microphysical scheme. We find that the new autoconversion (accretion) rate contributes 14% lower (greater) to total drizzle water content than the original scheme near the cloud top. Compared to satellite results, the simulated cloud liquid water path (LWP) and shortwave cloud radiative effect using the original scheme in a climate model agree well on global average but with large regional differences. Simulations using the updated scheme show a 7.3% decrease in the light rain frequency, and a 10% increase in LWP. The updated microphysics scheme alleviates the long‐lasting problem in most climate models, that is “too frequent and too light precipitation.”


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2020gl091836DOIArticle
http://www.archive.arm.govRelated ItemData
https://doi.org/10.6084/m9.figshare.13205981.v1DOIData
ORCID:
AuthorORCID
Dong, Xiquan0000-0002-3359-6117
Wu, Peng0000-0001-7066-5487
Wang, Yuan0000-0001-6657-8401
Xi, Baike0000-0001-6126-2010
Huang, Yiyi0000-0001-5090-9712
Additional Information:© 2021. American Geophysical Union. Issue Online: 24 March 2021; Version of Record online: 24 March 2021; Accepted manuscript online: 15 March 2021; Manuscript accepted: 04 March 2021; Manuscript revised: 11 February 2021; Manuscript received: 24 November 2020. This research was supported by the NSF project under grant AGS‐1700728/AGS‐2031750 at the University of Arizona and AGS‐1700727/AGS‐2031751 at California Institute of Technology. The researchers at the University of Arizona were also supported as part of the “Enabling Aerosol‐cloud interactions at GLobal convection‐permitting scalES (EAGLES)” project (74358), funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER), Earth System Modeling program with the subcontract to the University of Arizona. Y.W. acknowledges the support of the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. Measurements during ACE‐ENA IOP were obtained from the Atmospheric Radiation Measurement (ARM) Program sponsored by the U.S. Department of Energy (DOE) Office of Energy Research, Office of Health and Environmental Research, and Environmental Sciences Division. Data Availability Statement:The data can be downloaded from http://www.archive.arm.gov/. Ground‐based MBL cloud and drizzle microphysical property retrievals are archived at https://doi.org/10.6084/m9.figshare.13205981.v1.
Funders:
Funding AgencyGrant Number
NSFAGS‐1700728
NSFAGS‐2031750
NSFAGS‐1700727
NSFAGS‐2031751
Enabling Aerosol-cloud interactions at GLobal convection-permitting scalES (EAGLES)74358
Department of Energy (DOE)UNSPECIFIED
University of ArizonaUNSPECIFIED
NASA/JPL/CaltechUNSPECIFIED
Issue or Number:6
DOI:10.1029/2020gl091836
Record Number:CaltechAUTHORS:20210503-085353785
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210503-085353785
Official Citation:Dong, X., Wu, P., Wang, Y., Xi, B., & Huang, Y. (2021). New observational constraints on warm rain processes and their climate implications. Geophysical Research Letters, 48, e2020GL091836. https://doi.org/10.1029/2020GL091836
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108916
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 May 2021 18:08
Last Modified:03 May 2021 18:08

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