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The Source and Fate of Primary Production in Relation to Carbon Fluxes on NOAA's Long Line Cruises

Francisco Chavez, Reiko Michisaki, Mike Kelley
Peter Walz , Sarah Lyons

N95F: Indian Ocean Fall 1995

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Coastal Zone Color Scanner (CZCS) climatology map of January, February, March 1978-1986

The N95F cruise ran from February thru October 1995, thru the intermonsoonal and summer South West monsoonal (June-October) periods. Measurements were made of primary and new production observations relevant to climate and global change over large portions of the global ocean in an attempt to quantify the effects of the biological system on the carbon and nitrogen cycles.
On leg 8, from Perth, Australia to Colombo, Sri Lanka, productivity and nutrients data were collected at 31 CTD stations. The horizontal and vertical variability of phytoplankton biomass and composition, in the rates of primary and new production, in the optical character of the upper ocean and their relation to the major pools of ocean carbon were determined. Below is a table describing the legs of the cruise.

Leg Date Transit Project
1 Feb. 20 - Mar. 15 San Juan, P.R./ Durban, S.A. RITS/WOCE
2 Mar. 21 - Apr.22 Durban, S.A./ Colombo, S.L. WOCE
3 Apr. 28 - May 24 Colombo, S.L./ Muscat, Oman GLOBEC
4 May 31 - June 30 Muscat, Oman/ Victoria, Seychelles WOCE II
5 July 12 - July 23 Victoria, Seychelles/ Muscat, Oman WOCE II
6 July 31 - Aug. 26 Muscat, Oman/ Diego Garcia GLOBEC
7 Aug. 29 - Sep. 8 Diego Garcia/ Perth, Australia OACES
8 Sep. 22- Oct. 24 Perth, Australia/ Colombo, S.L. OACES

Table 1. A brief description of the legs, dates, and projects of the Indian Ocean cruise. Radiatively Important Trace Species (RITS), World Ocean Circulation Experiment (WOCE), Global Ocean Ecosystems Dynamics (GLOBEC), Ocean Atmosphere Carbon Exchange Study (OACES)

An MBARI Underway System was deployed on board and covered leg 1 to leg 8. The underway system ran continuously collecting nitrate, fluorescence, sea surface temperature (sst), salinity, and chlorophyll a derived from fluorscence. An AGU poster presentation of Underway results are available here. For further information contact Francisco Chavez (chfr@mbari.org) or Reiko Michisaki (reiko@mbari.org) .

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Last Updated: 28 April, 2004


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