The Source and Fate of Primary
Production in Relation to Carbon Fluxes on NOAA's Long Line Cruises
Chavez, Reiko Michisaki, Kurt Buck
N93S : North Atlantic Summer 1993
Seasonal composite of chlorophyll for the Summer,
from the Coastal Zone Color Scanner (CZCS 53k).
This cruise supports research funded by the NOAA Climate and Global Change
Program under the Ocean-Atmosphere Carbon Exchange Study (OACES) and the Radiatively Important
Trace Species (RITS) component of the Atmospheric Core Project. The goal of the OACES
project is to determine the source and sink regions of CO2 in the Equatorial and North
Atlantic during the summer. Baseline of total carbon inventory in this region was
established such that the uptake rate of atmospheric CO2 can be determined for future
cruises. Our contribution to this project was to enhance the observations relevant to
climate and global change with measurements of primary and new production in an attempt to
quantify the effects of the biological system on the carbon and nitrogen cycle.
The cruise took place aboard the NOAA
research vessel R/V MALCOLM BALDRIGE and occurred between July 7 - August 28, 1993. There
were three legs to the cruise of which the data submitted in this report encompasses only
Legs 1 and 2. Cruise tracks and station locations are shown in Figure 1. Leg 1 departed
from Fortaleza, Brazil and began sampling on July 7 at 5°S, 25°W with 0.5° station
spacing between 5°S and 5°N and 1° spacing afterwards. Kevlar stations were 5° apart.
Leg 1 ended in Funchal, Madeiras on August 15. Leg 2 began in Madeira, Portugal on August
18 and ended in Reykjavik, Iceland on August 28. CTD stations on Leg 2 were 1° apart.
An underway mapping system was deployed, providing a continuous record of
fluorescence, PAR, GPS positions, and nitrate. Data from this cruise was collect and
processed by personnel from the Monterey Bay Aquarium Research Institute (MBARI) and
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Last Updated: 09 July, 2004