Showing posts with label El Niño. Show all posts
Showing posts with label El Niño. Show all posts
Monday, October 31, 2022
Sunday, October 23, 2022
Tuesday, August 4, 2020
Monday, October 10, 2016
Monday, May 19, 2014
Is El Niño Developing? A NASA News
Data from ocean-observing satellites and
other ocean sensors indicate that El Niño conditions appear to be developing in
the equatorial Pacific Ocean. Conditions in May 2014 bear some similarities to
those of May 1997, a year that brought one of the most potent El Niño events of
the 20th century.
During an El Niño, easterly trade
winds in the Pacific falter and allow giant waves of warm water—known asKelvin waves—to drift
across from the western Pacific toward South America. Surface waters in the
central and eastern Pacific become significantly warmer than normal, altering
weather patterns and affecting fisheries along the west coasts of the Americas.
El Niño also can have a significant influence on weather and climate far from
the tropics.
The maps above show the ten-day average of sea surface
height centered on May 2, 1997 (left), and May 3, 2014. Shades of red and
orange indicate where the water is warmer and above normal sea level. Shades of
blue-green show where sea level and temperatures are lower than average. Normal
sea-level conditions appear in white. The 1997 map was assembled from data
collected by the TOPEX/Poseidon satellite, while
the 2014 data comes from the Ocean Surface Topography Mission/Jason 2
satellite.
The height of the sea surface is a good indicator of the
amount of heat stored in the water. As the ocean warms, the surface rises; as
it cools, its falls. This is due to thermal expansion and
contraction; the molecules in warmer water are farther apart than in cooler
water. Above-normal sea surface heights in the equatorial Pacific indicate El
Niño conditions, while below-normal heights indicate La Niña. (You can see an
example of La Niña here and El Niño here.)
“What we are now seeing in the tropical Pacific Ocean
looks similar to conditions in early 1997,” said Eric Lindstrom, oceanography
program manager at NASA headquarters. “If this continues, we could be looking
at a major El Niño this fall. But there are no guarantees.” Observations from a network of sensors within the
Pacific Ocean support the satellite view, showing a deep pool
of warm water that has been sliding eastward since January.
More information: http://earthobservatory.nasa.gov/
Thursday, April 10, 2014
And...some SST Anomalies Animations
Take out each their own conclusions. In the case of Peru, keep in mind the scales!
Source:NOAA
El Niño Update - (5S95W centered) off Peru
En orden sucesivo: TSM; T a 20 m; T a 40 m; T a 60 m; T a 80 m; Isoterma de 20°C; Estratificación. Datos centrados al 8 de Abril. 5S95W (aprox. frente oceánico de Paita - Perú).
Friday, August 6, 2010
International Workshop on ENSO, Decadal Variability and Climate Change in South America
Date: October 12th - 14th, 2010.
Place: Guayaquil-Ecuador
Rationale
The El Niño-Southern Oscillation (ENSO) has a profound influence on South American climate. For example, during an El Niño rainfall tends to increase over Ecuador and decrease over Colombia. Â However, the El Niño events that occurred during 2002-2003 and 2006-2007 were different. They did not result in impacts that might have been expected based on our past experiences. The reasons for the differences seen in South America and in other parts of the world are not fully understood, but are the subject of intense research in many countries. This research includes studies examining naturally occurring decadal variability in ENSO and ENSO impacts, differences in the details of sea-surface temperature patterns between El Niño events, and the influence of global warming on ENSO and on the way ENSO affects global weather patterns. It is hoped that this research will lead to more useful information for decision-making in the wider community. This workshop will bring climate experts from around the world to discuss this research and its relevance to South American climate.
Objectives
a) To review the latest scientific advances on ENSO, decadal variability and Climate Change in South America.
b) To review the projected trends and changes in ENSO Teleconnections in South America.
c) To discuss on  the potential climate impacts for the next 10-15 years and their  social and economical implications in South America
Organization of the workshop
The Workshop will be held from October 12th -14th and will be followed by the VI Session of the CLIVAR Pacific Panel from October 15th to 16th. The following thematic sessions will be developed:
Session I: ENSO dynamics, predictability, decadal modulation, and the influence of global climate change
Session II: ENSO impacts, modeling and forecasting in South America
Session III: Decadal variability and climate change in South America
Session IV:Â Impacts of ENSO on biogeochemistry and ecosystems (Morning - 14 October)
Session V: The 2009-2010 El Niño: regional analyses, forecasts, impacts, and climate service applications (Afternoon-14 October)
Scientific Committee
Carolina Vera (UBA, Argentina) co-chair
Michael McPhaden (NOAA, USA) co-chair
Lisa Goddard (IRI, USA)
Scott Power (BOM, Australia)
Axel Timmerman (IPRC, USA)
Affonso Mascarenhas (CIIFEN, Ecuador)
Boris Dewitte (IRD, Peru)
Jean-Philipe Boulanger (IRD, Argentina)
Organizing committee
Rodney Martinez (CIIFEN, Ecuador)
Wenju Cai (CSIRO, Australia)
Alex Ganachaud (Legos/IRD, New Caledonia, France)
Nico Caltabiano (ICPO, UK)
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