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Charn, Alexander B., Collins, William D. 
ORCID: https://orcid.org/0000-0002-4463-9848, Parishani, Hossein and Risser, Mark D.
(2021)
Global Microphysical Sensitivity of Superparameterized Precipitation Extremes.
Earth and Space Science, 8 (5).
ISSN 2333-5084
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Abstract
A recent study found statistically significant differences in extreme precipitation distributions over the contiguous United States (CONUS) when changing the microphysics scheme in a superparameterized global climate model. Here, we repeat the analysis globally and similarly find that differences are widespread when varying the number of predicted moments in the microphysics parameterization, but not when comparing variants of the double-moment scheme. However, contrary to the previous study in which differences largely disappeared over CONUS when 5-day simulations were conducted, we found that the signal in these shorter integrations remains within the tropics, implying a direct local effect of microphysics on precipitation extremes in these regions. The effect on precipitation is traced back to changes in vertical velocity profiles changes that are then amplified in the climatological simulations compared to the 5-day ones. Finally, the superparameterized extremes, regardless of the microphysics scheme, are shown to be larger than those from the Global Precipitation Climatology Project One-Degree Daily data set and generally smaller than those from the Tropical Rainfall Measuring Mission 3B42 data set.
| Item Type: | Article |
|---|---|
| Additional Information: | Data Availability Statement: Tropical Rainfall Measuring Mission data (TMPA Precipitation L3 1 day 0.25° × 0.25° V7) provided by the Goddard Earth Sciences Data and Information Services Center (GES DISC). Global Precipitation Climatology Project data (One-Degree Daily Version 1.3) provided by NCAR at ftp://ftp.cgd.ucar.edu/archive/PRECIP/. The SPCAM model can be accessed at https://doi.org/10.5281/zenodo.3727515. Model data needed to reproduce the figures can be found at https://portal.nersc.gov/project/m1517/cascade/charn2020_spcam_microphys/. The authors would like to thank Travis O'Brien for providing the ILIAD software. |
| Uncontrolled Keywords: | community atmosphere model,extreme precipitation,iliad,microphysics,superparameterization,tropical rainfall measuring mission,environmental science (miscellaneous),general earth and planetary sciences,sdg 13 - climate action ,/dk/atira/pure/subjectarea/asjc/2300/2301 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 10 Jul 2026 08:42 |
| Last Modified: | 12 Jul 2026 23:02 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/103814 |
| DOI: | 10.1029/2020EA001308 |
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