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  Revisiting observed trends in the jet streams and their link to tropical warming

Woollings, T., Drouard, M., O'Reilly, C., Sexton, D., McSweeney, C. (2023): Revisiting observed trends in the jet streams and their link to tropical warming, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0752

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016750 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016750_1
Genre: Conference Paper

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 Creators:
Woollings, Tim1, Author
Drouard, Marie1, Author
O'Reilly, Christopher1, Author
Sexton, David1, Author
McSweeney, Carol1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: We revisit observed zonal wind trends using 40 years of satellite-era reanalysis products and find evidence that general poleward shifts are emerging, often with low significance but notable similarity across different seasons and hemispheres. While much recent work has focused on the jet response to amplified Arctic warming, the observed trends are more consistent with the known sensitivity of the circulation to tropical warming. The circulation trends are within the range of historical model simulations but are relatively large compared to the models when the accompanying trends in upper tropospheric temperature gradients are considered. The balance between tropical warming and jet shifts should therefore be closely monitored in the near future. We also present a new hypothesis concerning the sensitivity of the circulation response to tropical heating which may be one factor affecting this balance.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0752
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -