hobbs_raphael_2007.pdf (355.26 kB)
A representative time-series for the Southern Hemisphere zonal wave 1
journal contribution
posted on 2023-05-17, 14:38 authored by William HobbsWilliam Hobbs, Raphael, MNRecent studies show that an ENSO component of west Antarctic climate variability is related to a persistent zonal pressure anomaly in the south Pacific, which in turn is related to the zonal wave 1 of the subpolar atmospheric circulation. In order to promote further investigation into its dynamics, a suite of time series are presented that describe the intensity and location of ZW1. These time series are shown to represent the SH zonally asymmetric circulation reasonably well. Analysis of the time series suggests that, consistent with previous research, there was a poleward and eastward shift in ZW1 over the late 20th Century. There was also an increase in amplitude variance over this period. Cross-correlation confirms a link with ENSO, and suggests a link between the subtropical and subpolar ZW1. Results also indicate a significant local interaction between south Pacific sea surface temperature and the intensity and location of ZW1.
History
Publication title
Geophysical Research LettersVolume
34Article number
L05702Number
L05702Pagination
6ppISSN
0094-8276Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright 2007 American Geophysical Union.Repository Status
- Open