ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 2, pp. 9-17

The technique of spatial separation of the upwelling by seasonal character

A.N. Serebrennikov 1 
1 Institute of Natural and Technical Systems RAS, Sevastopol, Russia
Accepted: 20.03.2019
DOI: 10.21046/2070-7401-2019-16-2-9-17
The article describes the technique of separation of a coastal upwelling into parts that differ in seasonal variation. Average monthly values of the thermal index of an upwelling, vertical speed of Ekman transport and Ekman pump were calculated on the basis of daily satellite information on the sea surface temperature and surface wind. Summation of each of these values over the latitudes of the proposed upwelling in climatic masks made it possible to determine the latitudes where the upwelling seasonal variation should vary. The technique is considered on examples of Benguela, Canary, Peruvian and Chilean upwellings. For the considered upwelling the latitude calculated by this technique which presumably divides an upwelling by the nature of seasonal variability is given. As an example, for the southern and northern parts of the Benguela upwelling, we plotted seasonal changes in the average monthly climatic values of the vertical speed of Ekman parameters at different latitudes that divide an upwelling. The latitude chosen by the technique is close to the latitude, which some authors (Tim et al., 2015) propose to use as the border between the southern and northern Benguela upwelling systems.
Keywords: seasonal variability, coastal upwelling, thermal upwelling index, Ekman transport, Ekman pumping, climate mask
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