Go to  Advanced Search

Nonlinear atmospheric variability in the winter northeast Pacific associated with the Madden-Julian oscillation

Show full item record

Files in this item

Files Size Format Description   View
Hsieh_AGU_2005_2005GL023533.pdf 352.2Kb Adobe Portable Document Format   View/Open
 
Title: Nonlinear atmospheric variability in the winter northeast Pacific associated with the Madden-Julian oscillation
Author: Jamet, Cedric; Hsieh, William W.
Issue Date: 2005-07-13
Publicly Available in cIRcle 2011-03-23
Publisher American Geophysical Union
Citation: Jamet, Cedric, Hsieh, William W. 2005. Nonlinear atmospheric variability in the winter northeast Pacific associated with the Madden-Julian oscillation, Geophysical Research Letters. 32 L13820 dx.doi.org/10.1029/2005GL023533
Abstract: The Madden-Julian Oscillation (MJO), the primary mode of large-scale intraseasonal variability in the tropics, is known to relate to the mid-latitude atmospheric variability. Using neural network techniques, a nonlinear projection of the MJO onto the precipitation and 200-hPa wind anomalies in the northeast Pacific during January–March shows asymmetric atmospheric patterns associated with different phases of the MJO. For precipitation, the strength of the nonlinear effect to the linear effect was 0.94 (in terms of the squared anomalies and averaged over all phases of the MJO), indicating strong nonlinearity, while for the 200-hPa wind, the ratio was 0.55, indicating moderate nonlinearity. In general, anomalous winds blowing from the north or from land were associated with negative precipitation anomalies, while winds from the south or from the open ocean, with positive precipitation anomalies. The nonlinear effects generally induced positive precipitation anomalies during all phases of the MJO. An edited version of this paper was published by AGU. Copyright 2005 American Geophysical Union.
Affiliation: Earth and Ocean Sciences, Dept. of (EOS), Dept of
URI: http://hdl.handle.net/2429/32800
Peer Review Status: Reviewed
Scholarly Level: Faculty

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893