Lagged Response of MJO Convection and Precipitation to Solar Ultraviolet Variations on Intraseasonal Time Scales

Hoopes, C. A.; Hood, L. L.; Galarneau, T. J.

doi:10.1029/2023GL107701

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Lagged Response of MJO Convection and Precipitation to Solar Ultraviolet Variations on Intraseasonal Time Scales

2024
By Hoopes, C. A. ; Hood, L. L. ; Galarneau, T. J.
Source: Geophysical Research Letters, 51(11)

[PDF-2.64 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Hoopes, C. A. ; Hood, L. L. ; Galarneau, T. J.

Hoopes, C. A. ; Hood, L. L. ; Galarneau, T. J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory)

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) Less -
Description:

Composite analyses of NOAA satellite‐based outgoing longwave radiation data and ERA5 reanalysis data for nearly six solar maximum periods support the existence of a response of tropical convection and precipitation to short‐term (∼27‐day) solar ultraviolet variations. Following solar UV peaks, the response consists of an increase in average convection and precipitation in the equatorial Indian Ocean and a decrease in the western and central tropical Pacific, with maximum amplitude at a lag of 4 to 8 days. The opposite occurs following short‐term solar UV minima. The observed responses are most detectable when the Madden‐Julian oscillation (MJO) is active and appear to be related to a reduced ability of the MJO to propagate across the Maritime Continent barrier following solar UV peaks relative to UV minima. A similar behavior has previously been found when the stratospheric quasi‐biennial oscillation is in its westerly phase relative to its easterly phase.
Source:

Geophysical Research Letters, 51(11)
DOI:

https://doi.org/10.1029/2023GL107701
ISSN:

0094-8276;1944-8007;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by/4.0/
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CC BY
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Submitted
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urn:sha256:a58f5e263a253e7e0aceb2f6dfd672ab579db1a8474c1990e3e8e5191a5b5999
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https://repository.library.noaa.gov/view/noaa/61424/noaa_61424_DS1.pdf
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Lagged Response of MJO Convection and Precipitation to Solar Ultraviolet Variations on Intraseasonal Time Scales

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