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- W2483141550 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 70:57-76 (2016) - DOI: https://doi.org/10.3354/cr01415 Implementation of a new empirical relationship between aerosol and cloud droplet concentrations in a climate model Hannah Lee1, Seong Soo Yum1,*, Sungbo Shim1,2 1Department of Atmospheric Sciences, Yonsei University, Seoul 03722, South Korea 2Climate Research Laboratory, National Institute of Meteorological Research, Korea Meteorological Administration, Seogwipo-si, Jeju-do 63568, South Korea *Corresponding author: ssyum@yonsei.ac.kr ABSTRACT: A new empirical relationship between aerosol and cloud droplet number concentrations (Naer and Nd, respectively) was established based on observed data from different regions around the world to implement in the Hadley Centre Global Environmental Model version 2– Atmosphere-Ocean (HadGEM2-AO). Compared to the original relationship used in HadGEM2-AO, which utilized observed data from only limited regions, this new relationship provides a lower Nd than the original relationship for Naer < 680 cm-3, and the opposite for Naer > 680 cm-3. The complete historical run with the new relationship (newHIST) shows a number of significant differences from the original historical run (HIST). Nd increased in industrialized regions while it generally decreased over the oceanic regions in newHIST compared to HIST. Interestingly, in newHIST a significant change in total cloud amount occurred mainly in the intertropical convergence zone (ITCZ) due to a change in the wind circulation pattern over the North Pacific. Notably, the surface temperature in newHIST was closer to the observational data than that in HIST—especially over the Northern Hemisphere. Despite the small change in Nd in the new relationship, not only the variables directly associated with cloud microphysics but also the variables representing atmospheric circulation patterns changed significantly. This implies that accurate parameterization of Nd is critical for better climate model prediction. KEY WORDS: Cloud droplet number concentration · Climate model · Aerosol activation Full text in pdf format PreviousNextCite this article as: Lee H, Yum SS, Shim S (2016) Implementation of a new empirical relationship between aerosol and cloud droplet concentrations in a climate model. Clim Res 70:57-76. https://doi.org/10.3354/cr01415 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 70, No. 1. Online publication date: September 26, 2016 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2016 Inter-Research." @default.
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- W2483141550 title "Implementation of a new empirical relationship between aerosol and cloud droplet concentrations in a climate model" @default.
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