Scatterometers observe the variation of the Walker circulation
Article first published online: 19 OCT 2006
©2001. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 82, Issue 45, pages 536–537, 6 November 2001
How to Cite
2001), Scatterometers observe the variation of the Walker circulation, Eos Trans. AGU, 82(45), 536–537, doi:10.1029/01EO00320., , , and (
- Issue published online: 19 OCT 2006
- Article first published online: 19 OCT 2006
The variation of the Walker circulation is closely related to the onset of El Niño-Southern Oscillation (ENSO) events [Kousky, 1984], so observing the Walker circulation can lead to better understanding of ENSO events. Wind data from the NASA Scatterometer (NSCAT), Quick Scatterometer (QuikSCAT), and European Remote Sensing Satellite-1/2 (ERS-1/2) were merged into one data set in a 1°×1° grid covering a period from January 1992 to December 2000. The study region was confined to the tropical oceans between 20°S and 20°N. The vector empirical orthogonal function (VEOF) method [Hardy and Walton, 1978] was used to process the wind data set and extract principal modes of the wind fields.