Atmospheric cyclones and seasonal cycles of biological productivity of the ocean

S. A. Piontkovski, K. A. Al-Hashmi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Remotely sensed wind speed, translation speed, atmospheric pressure, atmospheric precipitation rate and chlorophyll-a concentration were used to verify the hypothesis that the response of the phytoplankton community to propagating atmospheric cyclones should be associated with the phase of the seasonal cycle of this community and the translation speed of a cyclone. For the 12 cyclones investigated from the Indian Ocean, Pacific Ocean and the Mediterranean Sea the maximal sustained wind speed varied twofold, whereas the translation speed of cyclones and the chlorophyll ratio (characterizing chlorophyll concentration before and after cyclone passage) varied by 10-fold. It was shown that cyclones affecting the phytoplankton community approaching its seasonal maximum either could not stimulate or stimulated a weak response of further increase of chlorophyll-a concentration (due to explicitly available nutrients). Controversially, cyclones affecting the community approaching its seasonal minimum could induce gradual increase of chlorophyll-a concentration. An exponential type of relationship between chlorophyll ratio and translation speed of cyclones was evaluated. In the range of translation speeds from 1 to 10 ms-1, the increase of chlorophyll-a concentration due to cyclone passage was most pronounced with regard to slow moving cyclones.

Original languageEnglish
Pages (from-to)27-40
Number of pages14
JournalInternational Journal of Environmental Studies
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 2014

Fingerprint

cyclone
Productivity
productivity
Chlorophyll
ocean
chlorophyll a
community
chlorophyll
Phytoplankton
Indian Ocean
wind velocity
phytoplankton
Precipitation (meteorology)
atmospheric pressure
Nutrients
Atmospheric pressure
speed
fold
nutrient

Keywords

  • Arabian Sea
  • Atmospheric cyclones
  • Chlorophyll-a

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Pollution
  • Computers in Earth Sciences
  • Geography, Planning and Development
  • Ecology

Cite this

Atmospheric cyclones and seasonal cycles of biological productivity of the ocean. / Piontkovski, S. A.; Al-Hashmi, K. A.

In: International Journal of Environmental Studies, Vol. 71, No. 1, 01.2014, p. 27-40.

Research output: Contribution to journalArticle

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