Nitrate use by plankton in the eastern subtropical North Atlantic, March-April 1989.

Eppley, R. W. and Koeve, Wolfgang (1990) Nitrate use by plankton in the eastern subtropical North Atlantic, March-April 1989. Open Access Limnology and Oceanography, 35 . pp. 1781-1788.

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Abstract

Nitrate concentration was measured in seawater samples from the euphotic zone at the beginning and end of 12-h, daytime, in situ incubations. The changes in concentration are considered to be measurements of new production. During periods of 2-3 weeks in March-April 1989, important time scales for NO3- input to the euphotic zone (i.e. residence times) and new production were approximately 26 d at 18-degrees-N, 31-degrees-W and approximately 10 d near 33-degrees-N, 21-degrees-W. The average rate of NO3- use in the two areas was 2.63 and 0.62 mmol N m-2 (12 h)-1, or, in carbon equivalents 209 and 49 mg C m-2 d-1, respectively. These values bracket the large-scale estimate by Jenkins of new production in the nearby beta triangle of 150 mg C m-2 d-1.

Document Type: Article
Keywords: Biological Oceanography; SUB-TROPICAL GYRE; PRODUCTION-RATES; AZORES; FRONT
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
Open Access Journal?: No
ISSN: 0024-3590
Date Deposited: 07 Feb 2012 12:20
Last Modified: 25 Jun 2018 13:00
URI: http://oceanrep.geomar.de/id/eprint/13663

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