English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse
  1. Item Summary / 
  2. View item

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
 Local TagsRelease HistoryDetailsSummary
  Interannual-to-decadal modulation of wintertime sub-seasonal variability over the Eurasia-East Asian sector

Taguchi, B., Nishii, K., Mori, M., Nakamura, H. (2023): Interannual-to-decadal modulation of wintertime sub-seasonal variability over the Eurasia-East Asian sector, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4928

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021328 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021328_2
Genre: Conference Paper

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Taguchi, Bunmei1, Author
Nishii, Kazuaki1, Author
Mori, Masato1, Author
Nakamura, Hisashi1, 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: Wintertime sub-seasonal variability over the Eurasian continent is often accompanied by intense cold air outbreaks in East Asia. On interannual-to-decadal timescales, the wintertime sub-seasonal variability of surface air temperature (SAT) can be modulated by the longer timescale variability of the tropospheric seasonal mean state, which can be remotely influenced by oceanic variability in regions from the tropics to the Arctic. The objective of this study is to examine the interannual-to-decadal modulation of the wintertime sub-seasonal variability at the surface over Eurasia and East Asia. We defined sub-seasonal variability of SAT (SAT-SSV) for each year as a standard deviation of 10-60 days band-passed filtered SAT during a winter season from December through February and applied an EOF analysis to SAT-SSV derived from two sets of atmospheric reanalysis data: JRA55 and ERA-20C. Spatio-temporal structures of the two leading modes for the overlapped period correspond well with each other between the two reanalysis products. The two modes of the SAT-SSV exhibit zonally elongated patterns at different latitudes across the Eurasian continent which correspond well to horizontal gradients of the seasonal-mean SAT. The modes are also associated with seasonal mean, upper tropospheric circulation anomalies that extend circumglobally in the northern hemisphere. The seasonal mean circulation anomalies associated with the 1st mode of SAT-SSV are similar to Arctic Oscillation, whereas those associated with the 2nd mode of SAT-SSV display regional signatures of the North Atlantic Oscillation and Warm Arctic-Cold Eurasia patterns.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4928
 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: -