Interannual Temperature Variability in the Tropical Pacific and Lagrangian Heat Transport Pathways

Authors

C. L. Holland, University of Texas
Gary T. Mitchum, University of South FloridaFollow

Document Type

Article

Publication Date

3-17-2005

Keywords

El Niño, volume variability, trajectories

Digital Object Identifier (DOI)

https://doi.org/10.1029/2004JC002466

Abstract

In a previous study we found that volume variability during an El Ni (n) over tildeo-Southern Oscillation (ENSO) event is well described by variations in, and redistribution of, the heat content for any given region within the tropical Pacific. In this study we use numerical model temperature and velocity fields in a Lagrangian analysis of heat content variability. These three-dimensional fields are used to examine specific warm and cool anomaly regions by computing trajectories back through time to the origins of the anomalously warm or cool water. In particular, we find that three distinct pathways are important in creating and maintaining the warm eastern equatorial anomaly, including pathways in the basin interior in both hemispheres. After this warm anomaly at peak ENSO, off-equatorial anomalies form both in the eastern Pacific and in the far western Pacific. The west Pacific off-equatorial cool anomalies are attributed to ENSO variations in the Ekman pumping in those regions.

Rights Information

Terms of use for work posted in Scholar Commons.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Journal of Geophysical Research - Oceans, v. 110, issue C3, art. C03017

Copyright 2005 by the American Geophysical Union.

Scholar Commons Citation

Holland, C. L. and Mitchum, Gary T., "Interannual Temperature Variability in the Tropical Pacific and Lagrangian Heat Transport Pathways" (2005). Marine Science Faculty Publications. 51.
https://digitalcommons.usf.edu/msc_facpub/51