The Great Plains Low-Level Jet in MERRA-2

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deangelis_agu_poster_2024.pdf (3.1 MB)

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https://ntrs.nasa.gov/citations/20240015625

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http://hdl.handle.net/11603/38657

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UMBC Faculty Collection
UMBC GESTAR II

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Author/Creator ORCID

https://orcid.org/0000-0002-3566-3889
 https://orcid.org/0000-0003-3274-8542
 https://orcid.org/0000-0002-6433-7257

Date

2024-12

Type of Work

posters
Text

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Citation of Original Publication

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This is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain

Subjects

Earth Resources and Remote Sensing

Abstract

The Great Plains low-level jet (GPLLJ), characterized by its diurnally varying southerly winds in the lower troposphere, is a critical component of the hydroclimate in the central US. Here, we evaluate the representation of the GPLLJ in the Modern-Era Retrospective analysis for Research and Applications, version 2 (MERRA-2) developed by NASA’s Global Modeling and Assimilation Office (GMAO). Based on a preliminary analysis of several strong GPLLJ events, MERRA-2 is shown to be a valuable dataset for studying the horizontal, vertical, and diurnal characteristics of the LLJ. A comparison with rawinsonde and radar wind profiles suggests that the strength and height of the LLJ is overall realistic in MERRA-2.