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Title: Assessing Two Approaches for Enhancing the Range of Simulated Scales in the E3SMv1 and the Impact on the Character of Hourly US Precipitation

Journal Article · · Geophysical Research Letters
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Department of Geography University of Georgia Athens GA USA
  2. Department of Geography University of Georgia Athens GA USA, Environmental Science Division Argonne National Laboratory Lemont IL USA
  3. Atmospheric, Earth and Energy Division Lawrence Livermore National Laboratory Livermore CA USA
  4. National Center for Atmospheric Research Climate and Global Dynamics Laboratory Boulder CO USA, Department of Earth and Atmospheric Sciences Cornell University Ithaca NY USA
  5. School of Marine and Atmospheric Sciences Stony Brook University Stony Brook NY USA
+ Show Author Affiliations

Abstract Improving the representation of precipitation in Earth system models is essential for understanding and projecting water cycle changes across scales. Progress has been hampered by persistent deficiencies in representing precipitation frequency, intensity, and timing in current models. Here, we analyze simulated US precipitation in the low‐resolution (LR) configuration of the Energy Exascale Earth System Model (E3SMv1) and assess the effect of two approaches to enhance the range of explicitly resolved scales: high‐resolution (HR) and multiscale modeling framework (MMF), which incur similar computational expense. Both E3SMv1‐MMF and E3SMv1‐HR capture more intense and less frequent precipitation on hourly and daily timescales relative to E3SMv1‐LR. E3SMv1‐HR improves the intensity over the Eastern and Northwestern US during winter, while E3SMv1‐MMF improves the intensity over the Eastern US and summer diurnal timing over the Central US. These results indicate that both methods may be needed to improve simulations of different storm types, seasons, and regions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019459; SC0021209; SC0022070
OSTI ID:
1898156
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 4 Vol. 49; ISSN 0094-8276
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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