Spatial and temporal seasonal trends in the major global upwelling areas during the last 30 years
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1
Vigo university, Spain
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2
Aveiro University, Portugal
Winds at the ocean surface are a key element in the Earth system having a great impact on many economic activities and becoming really important to several oceanographic and atmospheric applications. Thus, wind above sea surface constitutes a critical parameter to analyze coastal phenomena as upwelling events. Upwelling regions are areas of high productivity compared to other areas of the ocean. In fact, over 20% of global fish catches occur in upwelling areas, although these areas occupy less than 1% of the surface of the world's oceans. Therefore, accurate surface wind datasets are needed to better analyze these processes. In this study wind data obtained from NCEP Climate Forecast System Reanalysis (CFSR) database was used to analyse the four most important upwelling systems (Benguela, Canarias, Peru and California). Wind data are available for the whole world at a spatial resolution of 0.3 x 0.3 degrees and a temporal resolution of 6h from January 1982 to December 2010. Alongshore wind stress was considered to analyse variations in upwelling intensity and trends were analysed on these upwelling regions. Comparison with previous studies showed the highly dependence of the results of the length of the time series, the selected areas, the season considered for the analysis and the resolution of the used database.
Keywords:
CFSR,
wind stress,
upwelling,
East Pacific coast,
East Atlantic coast,
upwelling trends
Conference:
IMMR | International Meeting on Marine Research 2014, Peniche, Portugal, 10 Jul - 11 Jul, 2014.
Presentation Type:
Poster Presentation
Topic:
BIODIVERSITY, CONSERVATION AND COASTAL MANAGEMENT
Citation:
Rodríguez
RV,
Gesteira
RG,
González
FS,
Rodríguez
MD and
Fernández
IÁ
(2014). Spatial and temporal seasonal trends in the major global upwelling areas during the last 30 years.
Front. Mar. Sci.
Conference Abstract:
IMMR | International Meeting on Marine Research 2014.
doi: 10.3389/conf.fmars.2014.02.00099
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Received:
25 Apr 2014;
Published Online:
18 Jul 2014.
*
Correspondence:
Mr. Rubén V Rodríguez, Vigo university, Ourense, Spain, ruvarela@uvigo.es