Influence of the El Nino-La Nina cycle on satellite-derived primary production in the California Current

Citation:
Kahru, M, Mitchell BG.  2002.  Influence of the El Nino-La Nina cycle on satellite-derived primary production in the California Current. Geophysical Research Letters. 29

Date Published:

Sep

Keywords:

chlorophyll, nonseasonal variability

Abstract:

[1] Time series of phytoplankton net primary production (NPP) for the California Current were derived using satellite data and the VGPM primary productivity model for a 5-year period (1997-2001) including the 1997-98 El Nino. NPP had a strong annual periodicity correlated with the El Nino-La Nina cycle. The most obvious effects of the El Nino on NPP were 100-300 km off the coast: a reduction by 30% off Southern California but an increase by 40% off Baja California. During its peak El Nino decreased NPP by 10-15% (1.5 Tg C month(-1)) in the 1000-km band off Southern California but increased by 20-30% off Northern and Southern Baja (4 Tg C month(-1)). The total annual NPP was lowest during the El Nino years of 1997-1998 and peaked in 2000. Trends of increasing NPP and zooplankton volume were observed off Central and Southern California.

Notes:

n/a

Website

DOI:

10.1029/2002gl014963

Scripps Publication ID:

1846