Please Note:

The Open Access Repository will be moving to a new authentication system on the 1st of November.

From this date onwards, account holders will be required to login using their University of Tasmania credentials.
If your current repository username differs from your University username, please email E.Prints@utas.edu.au so we can update these details on your behalf.

Due to the change, there will be a short outage of the repository from 9am on the morning of the 1st of November

Open Access Repository

The years of El Nino, La Nina and interactions with the tropical Indian Ocean

Downloads

Downloads per month over past year

Meyers, G and McIntosh, PC and Pigot, L and Pook, MJ (2007) The years of El Nino, La Nina and interactions with the tropical Indian Ocean. Journal of Climate, 20 (1). pp. 2872-2880. ISSN 0894-8755

[img] PDF
4537.pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

The Indian Ocean zonal dipole is a mode of variability in sea surface temperature that seriously affects
the climate of many nations around the Indian Ocean rim, as well as the global climate system. It has been
the subject of increasing research, and sometimes of scientific debate concerning its existence/nonexistence
and dependence/independence on/from the El Niño–Southern Oscillation, since it was first clearly identified
in Nature in 1999. Much of the debate occurred because people did not agree on what years are the El Niño
or La Niña years, not to mention the newly defined years of the positive or negative dipole. A method that
identifies when the positive or negative extrema of the El Niño–Southern Oscillation and Indian Ocean
dipole occur is proposed, and this method is used to classify each year from 1876 to 1999. The method is
statistical in nature, but has a strong basis on the oceanic physical mechanisms that control the variability
of the near-equatorial Indo-Pacific basin. Early in the study it was found that some years could not be
clearly classified due to strong decadal variation; these years also must be recognized, along with the reason
for their ambiguity. The sensitivity of the classification of years is tested by calculating composite maps of
the Indo-Pacific sea surface temperature anomaly and the probability of below median Australian rainfall
for different categories of the El Niño–Indian Ocean relationship.

Item Type: Article
Journal or Publication Title: Journal of Climate
Publisher: American Meteorological Society
Page Range: pp. 2872-2880
ISSN: 0894-8755
Identification Number - DOI: 10.1175/JCLI4152.1
Additional Information:

Copyright 2007 AMS. Full copyright information is available at http://www.ametsoc.org/pubs/copyrightinfo/AMS_Copyright_Policy_2001_final.pdf

Date Deposited: 07 Apr 2008 14:44
Last Modified: 18 Nov 2014 03:36
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP