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Abraham, Carsten, Goldblatt, Colin and Matthews, Adrian J. 
ORCID: https://orcid.org/0000-0003-0492-1168
(2023)
Systematic occurrence cycle of typical RH-profiles during the MJO: evidence for ubiquitous pre-moistening.
Geophysical Research Letters, 50 (20).
ISSN 0094-8276
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Abstract
We describe how typical relative humidity (RH) profiles change systematically through the phases of the Madden–Julian Oscillation (MJO). We use 18 years of classified RH-profiles from the Atmospheric Infrared Sounder, clustered without prior knowledge of large-scale dynamics or occurrence-region. Occurrence probability (OP) anomalies of RH-profiles classes exhibit classical MJO patterns: Large positive OP anomalies of the RH-profile class with most moisture in the free troposphere are co-located with the largest positive precipitation anomalies. About 10 days prior to this deep convective core large OP anomalies of a RH-profile class occur consistent with lower atmospheric moistening, supporting a ubiquitous role of pre-moistening in MJO propagation. Since each RH-profile class is associated with distinct dynamics (most of which are subgrid-scale to climate models) our results can serve as process-based diagnostics to investigate parameterization shortcomings of climate models preventing them to simulate the MJO accurately.
| Item Type: | Article |
|---|---|
| Additional Information: | Research Funding: Flood Hazard Identification and Mapping Program; Canadian Space Agency; 16SUASOMTR; Natural Sciences and Engineering Research Council of Canada. Grant Number: RGPIN-2018-05929; Research Tools and Equipment. Grant Number: RTI-2020-00277; Natural Environment Research Council. Grant Number: NE/R016704/1 |
| Uncontrolled Keywords: | mjo,satellite observations,water vapor distribution,geophysics,earth and planetary sciences(all),sdg 13 - climate action ,/dk/atira/pure/subjectarea/asjc/1900/1908 |
| Faculty \ School: | Faculty of Science > School of Natural Sciences (former - to 2024) Faculty of Science > School of Environmental Sciences University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Fluids & Structures Faculty of Science > Research Groups > Numerical Simulation, Statistics & Data Science |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 26 Sep 2023 09:30 |
| Last Modified: | 07 Nov 2024 12:47 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/93098 |
| DOI: | 10.1029/2023GL104991 |
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