Is the Madden‐Julian Oscillation a Moisture Mode?

Mayta, Víctor C.; Adames Corraliza, Ángel F.

doi:10.1029/2023gl103002

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Is the Madden‐Julian Oscillation a Moisture Mode?

2023
By Mayta, Víctor C. ; Adames Corraliza, Ángel F.
Source: Geophysical Research Letters, 50(15)

[PDF-2.82 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Mayta, Víctor C. ; Adames Corraliza, Ángel F.

Mayta, Víctor C. ; Adames Corraliza, Ángel F. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

The governing thermodynamics of the Madden‐Julian Oscillation (MJO) is examined using sounding and reanalysis data. On the basis of four objective criteria, results suggest that the MJO behaves like a moisture mode–a system whose thermodynamics is governed by moisture–only over the Indian Ocean. Over this basin, the MJO shows a slow convective adjustment timescale, its zonal scale is smaller, and it exhibits slow propagation, allowing moisture modes to exist. Elsewhere, the faster‐propagating wavenumber 1–2 components are more prominent preventing weak temperature gradient (WTG) balance to be established. As a result, temperature and moisture play similar roles in the MJO's thermodynamics outside the Indian Ocean.
Keywords:

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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 50(15)
DOI:

https://doi.org/10.1029/2023gl103002
ISSN:

0094-8276;1944-8007;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA22OAR4310611
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Library
Main Document Checksum:

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urn:sha256:5959d5c048c4b636a7e11b3ee1d3c7681228b2d0d53cd62d4a6dbb82d21f6442
Download URL:

https://repository.library.noaa.gov/view/noaa/58252/noaa_58252_DS1.pdf
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Machine readable version (XML)

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