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El Niño Update – 20 July 2009

Posted by feww on July 21, 2009

Summary

  • El Niño conditions are present across the equatorial Pacific Ocean.

  • Positive sea surface temperature (SST) departures continue to increase across much of the equatorial Pacific Ocean.

  • Current observations and dynamical model forecasts indicate ElNiño conditions will continue to intensify and are expected to last through Northern Hemisphere winter 2009-10.

Global SST Departures (ºC)

average SSr anomalies

During the last four weeks, equatorial SSTs were above-average in the Pacific and Indian Oceans. Also, above-average SSTs covered much of the Northern Hemisphere mid-to-high latitudes.

Atmospheric Circulation over the North Pacific & North America During the Last 60 Days

atmo circ NP- NA - 60 days
During late May and early June, below-average heights persisted over Canada contributing to below-average temperatures over central and eastern Canada. During early June through mid-July, an anomalous north-south dipole in height anomalies (below-average heights over the eastern U.S. and above-average heights over eastern Canada) contributed to near or below-average temperatures over portions of New England and across the Great Lakes and to above-average temperatures in eastern Canada. Credit: All diagrams and captions by NOAA.

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One Response to “El Niño Update – 20 July 2009”

  1. feww said

    El Niño Update – 27 July 2009
    https://feww.wordpress.com/2009/07/28/el-nino-update-%E2%80%93-27-july-2009/

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