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Interannual Correlations Between Sea Surface Temperature and Concentration of Chlorophyll Pigment Off Punta Eugenia, Baja California During Different Remote Forcing Conditions : Volume 10, Issue 3 (29/05/2013)

By Herrera-cervantes, H.

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Book Id: WPLBN0004020763
Format Type: PDF Article :
File Size: Pages 30
Reproduction Date: 2015

Title: Interannual Correlations Between Sea Surface Temperature and Concentration of Chlorophyll Pigment Off Punta Eugenia, Baja California During Different Remote Forcing Conditions : Volume 10, Issue 3 (29/05/2013)  
Author: Herrera-cervantes, H.
Volume: Vol. 10, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Gutiérrez-De-Velasco, G., Lluch-Cota, S. E., Lluch-Cota, D. B., & Herrera-Cervantes, H. (2013). Interannual Correlations Between Sea Surface Temperature and Concentration of Chlorophyll Pigment Off Punta Eugenia, Baja California During Different Remote Forcing Conditions : Volume 10, Issue 3 (29/05/2013). Retrieved from http://worldebookfair.org/


Description
Description: Unidad La Paz, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), La Paz, Baja California Sur 23050, México. Interannual correlation between satellite-derived sea surface temperature (SST) and surface chlorophyll a (Chl a) are examined in the coastal upwelling zone off Punta Eugenia on the west coast of the Baja California Peninsula, area identified as intense biological productivity and oceanographic transition between mid-latitude and tropical ocean conditions. We used empirical orthogonal functions (EOF) analysis separately and jointly on the two fields from 1997 through 2007, a time period dominated by different remote forcing; ENSO conditions (weak, moderate and strong) and the largest intrusion of subarctic water reported in the last 50 yr. Coastal Upwelling Index anomalies (CUI) and the Multivariate ENSO Index (MEI) were used to identify the influence of local (wind stress) and remote (ENSO) forcing over the interannual variability of both variables. The individual EOF1 analysis showed the greater variability of SST and Chla offshore, their corresponding amplitude time series presented the highest peaks during the intrusion of subartic water (2002–2004) and were significantly correlated with the MEI (RSST ≈ 0.68, RChl a ≈ −0.30, P < 0.001) and moderately correlated with the CUI (RSST ≈ −0.4, RChl a ≈ 0.25, P < 0.001), showing similar trends. The joint EOF1 and the SST–Chl a correlations pattern show the area where both variables covary tightly; a band near to the coast with the largest correlations (R > |0.4|) mainly regulated by ENSO cycles. This was revealed when we calculate the homogeneous correlations for the periods El Niño–La Niña and the intrusion of subartic water. Both, SST and Chl a showed higher coupling and two distinct physical-biological responses; on average ENSO influence were clearly along the coast mostly in SST while the subarctic water influence, were observed offshore mostly in Chl a. We found a coastal chlorophyll bloom correlated strongly with high wind stress anomalies that reach the coast off Punta Eugenia during spring and summer 2002 and continued its presence during 2003 which showed an enrichment pattern similar to that observed at high latitudes (∼40° N). This observation may provide an explanation of why Punta Eugenia is one of the most important biological action centers.

Summary
Interannual correlations between sea surface temperature and concentration of chlorophyll pigment off Punta Eugenia, Baja California during different remote forcing conditions

Excerpt
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