English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  The Aleutian-Icelandic lows seesaw and related interannual variation of the mass-weighted isentropic zonal mean meridional circulation

Kuramochi, M., Ueda, H., Iwasaki, T., Takaya, K. (2023): The Aleutian-Icelandic lows seesaw and related interannual variation of the mass-weighted isentropic zonal mean meridional circulation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2223

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018584 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018584_1
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Kuramochi, Masaya1, Author
Ueda, Hiroaki1, Author
Iwasaki, Toshiki1, Author
Takaya, Koutarou1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

Content

show
hide
Free keywords: -
 Abstract: The atmospheric general circulation diagnosed by the mass-weighted isentropic zonal mean exhibits extratropical direct (ETD) circulation driven by eddy momentum transport. Using a reanalysis dataset, we investigated regional atmospheric modulations associated with the year-to-year variability of ETD circulation in boreal winter. Composite analyses showed that the interannual variability of ETD circulation accompanies a seesaw-like variation between the Aleutian (AL) and Icelandic lows (IL), which coincides with the Pacific–North American teleconnection pattern and North Atlantic dipole anomaly. A diagnosis using isentropic airmass fluxes representing the geographical Lagrangian mean motion indicated that the significant intensification of upper-tropospheric poleward warm airflow over the eastern North Pacific is responsible for the enhanced ETD circulation, together with the intensified equatorward lower cold airflow over East Asia and eastern North America. The resultant enhanced upward propagation of the stationary planetary waves corresponds to the intensification of the divergence of the Eliassen-Palm flux, which explains the modulated ETD circulation in view of the balance between the Coriolis force and convergence of eddy momentum. These results suggest that the AL-IL seesaw is influential in the global general circulation variability in the Northern Hemisphere winter, and the anomalous ETD circulation interacts with several teleconnection patterns involving the modulation of planetary waves through anomalous meridional heat transport by the basin-wide scale eddies.

Details

show
hide
Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-2223
 Degree: -

Event

show
hide
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

Legal Case

show

Project information

show

Source 1

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