Impact of Alaskan Stream Eddies on Chlorophyll Distribution in the North Pacific | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Impact of Alaskan Stream Eddies on Chlorophyll Distribution in the North Pacific

Type de publication:

Journal Article

Source:

Journal of Oceanography, Volume 66, Ticket 3, p.319-328 (2010)

ISBN:

0916-8370

Numéro d'accès:

ISI:000277025300002

URL:

http://www.springerlink.com/content/l05kg742r5401617/

Mots-clés:

UMR 7154 ; Géosciences Marines ; Alaskan Stream - mesoscale eddies - chlorophyll-a - North Pacific - sea level anomaly

Résumé:

The impact of the Alaskan Stream (AS) eddies on the chlorophyll a (chl-a) distribution in the central subarctic North Pacific was investigated through analysis of chl-a and altimetry data from satellite observations. Altimetry observations provided the locations of mesoscale eddies in time and space within the maps of chlorophyll distributions. The climatological chl-a distributions averaged in the area and time showing presence of AS eddies suggested that AS eddies contributed significantly to the chl-a distribution in the deep-sea region of the subarctic North Pacific. The chl-a distribution was closely related to the AS eddies regardless of whether the eddy was located in or detached from the AS. A combination of two or three AS eddies sometimes formed high chl-a concentration belts that injected chlorophyll and coastal nutrient-rich waters southward from the Aleutian Islands far into the deep-sea region of the subarctic North Pacific. These results indicate that chl-a distribution in the central subarctic North Pacific was strongly impacted by AS eddies.

Notes:

Ueno, Hiromichi Crawford, William R. Onishi, Hiroji