Enhanced jet stream waviness induced by suppressed tropical Pacific convection during boreal summer

Sun, Xiaoting; Ding, Qinghua; Wang, Shih-Yu Simon; Topál, Dániel; Li, Qingquan; Castro, Christopher; Teng, Haiyan; Luo, Rui; Ding, Yihui

doi:10.1038/s41467-022-28911-7

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Enhanced jet stream waviness induced by suppressed tropical Pacific convection during boreal summer

2022
By Sun, Xiaoting ; Ding, Qinghua ; Wang, Shih-Yu Simon ; ...

Details

Journal Title:

Nature Communications
Personal Author:

Sun, Xiaoting ; Ding, Qinghua ; Wang, Shih-Yu Simon ; Topál, Dániel ; Li, Qingquan ; Castro, Christopher ; Teng, Haiyan ; Luo, Rui ; Ding, Yihui
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research)
Description:

Consensus on the cause of recent midlatitude circulation changes toward a wavier manner in the Northern Hemisphere has not been reached, albeit a number of studies collectively suggest that this phenomenon is driven by global warming and associated Arctic amplification. Here, through a fingerprint analysis of various global simulations and a tropical heating-imposed experiment, we suggest that the suppression of tropical convection along the Inter Tropical Convergence Zone induced by sea surface temperature (SST) cooling trends over the tropical Eastern Pacific contributed to the increased summertime midlatitude waviness in the past 40 years through the generation of a Rossby-wave-train propagating within the jet waveguide and the reduced north-south temperature gradient. This perspective indicates less of an influence from the Arctic amplification on the observed mid-latitude wave amplification than what was previously estimated. This study also emphasizes the need to better predict the tropical Pacific SST variability in order to project the summer jet waviness and consequent weather extremes.
Keywords:

General Biochemistry, Genetics And Molecular Biology General Chemistry General Physics And Astronomy Multidisciplinary General Biochemistry, Genetics And Molecular Biology General Physics And Astronomy General Biochemistry, Genetics And Molecular Biology General Physics And Astronomy
Source:

Nature Communications, 13(1)
DOI:

https://doi.org/10.1038/s41467-022-28911-7
ISSN:

2041-1723
Format:

PDF
Publisher:

Springer Science and Business Media LLC
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4310424 ; Grant no. NA19OAR4310281
License:

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

CC BY
Compliance:

Library
Main Document Checksum:

urn:sha256:4c254e9867819656023f9021bd2dd591cbf857bdc0d5f80f0b57c3e8d82bbe22
Download URL:

https://repository.library.noaa.gov/view/noaa/58584/noaa_58584_DS1.pdf
File Type:

[PDF - 6.15 MB ]

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