Orbital Forcing Strongly Influences the Poleward Shift of the Spring Himalayan Jet During the Past Millennium

Thapa, U. K.; Stevenson, S.; Midhun, M.

doi:10.1029/2021gl095955

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Orbital Forcing Strongly Influences the Poleward Shift of the Spring Himalayan Jet During the Past Millennium

2022
By Thapa, U. K. ; Stevenson, S. ; Midhun, M.
Source: Geophysical Research Letters, 49(3)

[PDF-4.43 MB]

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Thapa, U. K. ; Stevenson, S. ; Midhun, M.

Thapa, U. K. ; Stevenson, S. ; Midhun, M. Less -
NOAA Program & Office:

NWS (National Weather Service)
Description:

The latitudinal position of the subtropical jet over the Himalayas (Himalayan jet latitude or HJL) controls the region's climate during winter and spring by guiding moisture-delivering storms. Here we use the Community Earth System Model-Last Millennium Ensemble to diagnose forced trends in HJL during the past millennium. During 850–1849, there is a weak equatorward trend in winter HJL. In contrast, the spring HJL has a relatively larger poleward trend, and increases in both variance and frequency of poleward/equatorward excursions. We demonstrate changes in orbital precession reduced the thermal gradient between tropical and subtropical Asia, shifting the spring HJL poleward. During 1850–2005, the spring HJL exhibits no trend due to
Keywords:

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General Earth And Planetary Sciences Geophysics
Source:

Geophysical Research Letters, 49(3)
DOI:

https://doi.org/10.1029/2021gl095955
ISSN:

0094-8276;1944-8007;
Format:

PDF
Publisher:

American Geophysical Union (AGU)
Document Type:

Journal Article
Funding:

Grant no. NA18NWS4620043B
License:

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

CC BY
Compliance:

Library
Main Document Checksum:

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urn:sha256:9bdd1c3177e126459bda5a7927b785b5bdbcd539b67e03e52a1850490779cc52
Download URL:

https://repository.library.noaa.gov/view/noaa/54844/noaa_54844_DS1.pdf
File Type:

Machine readable version (XML)

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