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Sea Surface Temperature Anomalies, Seasonal Cycle and Trend Regimes in the Eastern Pacific Coast : Volume 8, Issue 3 (25/05/2011)

By Ramos-rodríguez, A.

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Book Id: WPLBN0003988254
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Sea Surface Temperature Anomalies, Seasonal Cycle and Trend Regimes in the Eastern Pacific Coast : Volume 8, Issue 3 (25/05/2011)  
Author: Ramos-rodríguez, A.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Lluch-Cota, S. E., Lluch-Cota, D. B., Trasviña-Castro, A., & Ramos-Rodríguez, A. (2011). Sea Surface Temperature Anomalies, Seasonal Cycle and Trend Regimes in the Eastern Pacific Coast : Volume 8, Issue 3 (25/05/2011). Retrieved from

Description: Programa de Ecología Pesquera, Centro de Investigaciones Biológicas del Noroeste, S.C. La Paz, Mexico. We used the extended reconstruction of sea surface temperature (ERSST) to analyze the variation of surface temperature and the seasonal cycle along the coast of the eastern Pacific (60° N–60° S, 61 pixels alongshore) from 1950 to 2010 (732 months). First we analyzed the monthly anomalies and looked for a relationship of such anomalies with total solar radiation (TSI) and then, the regime shift detector (RSD) was applied to detect possible temperature regimes in the series. Posterior to this, we calculated a yearly temperature range per pixel (amplitude of seasonal cycle) and through the subtraction of a latitudinal theoretical curve of temperature based on solar irradiance, the residuals of the seasonal cycle were obtained. The results showed an almost complete spatial synchrony and dominance of negative anomalies from 1950 to mid-late 1970's, with a switch to near-zero and positive anomalies in the late 1990's when a shift to negative values is detected. Such a shift lasted until the early 2000's when positive anomalies appear again but there is a change to negative anomalies in the late 2000's. These results were supported by the RSD. The TSI variability shows a clear relationship with that in sea surface temperature anomalies and with the regime changes. This would be due to a difference in the amount of energy received from the sun. Comparing two consecutive periods, 1952–1975 with 1977–1999, the second received 0.39 % more energy (approximately 3 × 108 J m−2) from the sun. Seasonal cycles show larger range at northern latitudes (>40° N), northern tropical-template transition zone (20°–26° N) and in the tropical-equatorial band (0°–30° S). The smaller ranges occur at 0°–16° N and 50°–60° S. The residuals (seasonal minus the theoretical curve) indicate a clear modulation due to advection by ocean currents.

Sea surface temperature anomalies, seasonal cycle and trend regimes in the eastern Pacific coast

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