English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Circumglobal Rossby wave patterns during boreal winter highlighted by space–time spectral analysis

Riboldi, J., Rousi, E., D'Andrea, F., Rivière, G., Lott, F. (2022): Circumglobal Rossby wave patterns during boreal winter highlighted by space–time spectral analysis. - Weather and Climate Dynamics, 3, 2, 449-469.
https://doi.org/10.5194/wcd-3-449-2022

Item is

Files

show Files
hide Files
:
26881oa.pdf (Publisher version), 12MB
Name:
26881oa.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Riboldi, Jacopo1, Author
Rousi, Eftychia2, Author              
D'Andrea, Fabio1, Author
Rivière, Gwendal1, Author
Lott, Francois1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

Content

show
hide
Free keywords: -
 Abstract: The classic partitioning between slow-moving, low-wavenumber planetary waves and fast-moving, high-wavenumber synoptic waves is systematically extended by means of a wavenumber/phase speed spectral decomposition to characterize the day-to-day evolution of Rossby wave activity in the upper troposphere. This technique is employed to study the origin and the propagation of circumglobal Rossby wave patterns (CRWPs), amplified Rossby waves stretching across the Northern Hemisphere in the zonal direction and characterized by few, dominant wavenumbers. Principal component analysis of daily anomalies in spectral power allows for two CRWPs to emerge as dominant variability modes in the spectral domain during boreal winter. These modes correspond to the baroclinic propagation of amplified Rossby waves from the Pacific to the Atlantic storm track in a hemispheric flow configuration displaying enhanced meridional gradients of geopotential height over midlatitudes. The first CRWP is forced by tropical convection anomalies over the Indian Ocean and features the propagation of amplified Rossby wave packets over northern midlatitudes, while the second one propagates rapidly over latitudes between 35° N and 55° N and appears to have extratropical origin. Propagation of Rossby waves from the Atlantic eddy-driven jet to the African subtropical jet occurs for both CRWPs following anticyclonic wave breaking.

Details

show
hide
Language(s): eng - English
 Dates: 2022-03-012022-04-082022-04-08
 Publication Status: Finally published
 Pages: 21
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.5194/wcd-3-449-2022
MDB-ID: No data to archive
PIKDOMAIN: RD1 - Earth System Analysis
Organisational keyword: RD1 - Earth System Analysis
Research topic keyword: Atmosphere
Research topic keyword: Extremes
Research topic keyword: Weather
Regional keyword: Europe
OATYPE: Gold Open Access
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Weather and Climate Dynamics
Source Genre: Journal, other, oa
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 3 (2) Sequence Number: - Start / End Page: 449 - 469 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/weather-and-climate-dynamics
Publisher: Copernicus