Chemical and Hydrographic Measurements from the
Equatorial Pacific during Boreal Autumn, 1992

M. F. Lamb (1), T. Lantry (2), J. Hendee (2), K. E. McTaggart (1), P. P. Murphy (1), R. A. Feely (1),
R. Wanninkhof (2), F. J. Millero (3), R. H. Byrne (4), E. T. Peltzer (5) and D. Frazel (2).

(1)NOAA Pacific Marine Environmental Laboratory, Seattle, WA 98115-0070.
(2)NOAA Atlantic Oceanographic and Meteorological Laboratory, Miami, FL 33149.
(3)Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL 33149.
(4)Department of Marine Science, University of South Florida, St. Petersburg, FL 33701.
(5)Chemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.

NOAA Data Report ERL PMEL-56
Pacific Marine Environmental Laboratory
Seattle, Washington

September 1995.


ABSTRACT

In the boreal autumn of 1992, NOAA's Climate and Global Change Program sponsored a major cooperative effort with the U.S. JGOFS Program in the central and eastern equatorial Pacific to investigate the unique role of equatorial processes on CO2 cycling during, and following, the 1991-92 ENSO event. Data were collected meridionally along four transects, generally between 10°N and 10°S. The first leg (Leg 3) included the 140°W and 125°W transects; the second leg (Leg 4) sampled along 110°W, and the third leg (Leg 5) included stations along 95°W and three short transects extending westward from the Peru coast. Chemical parameters sampled included fCO2, DIC, TAlk, pH, TOC and nutrients. Ancillary measurements of salinity, temperature and dissolved oxygen (DO) were also taken. Description of sampling methods and data summaries are given in this report.


Acknowledgements

The assistance of the officers and crew of the NOAA Ship Discoverer is gratefully acknowledged. The authors also wish to thank Ryan Whitney for manuscript preparation, and the critical review of John Bullister and Jim Johnson of PMEL. Jim Gendron, also of PMEL, is acknowledged for formatting the data tables in appendix A. This research was supported by the Climate and Global Change Program of NOAA as part of the joint NSF/NOAA sponsored U.S. JGOFS Equatorial Pacific Process Study. We thank Drs. James F. Todd of the NOAA Office of Global Programs and Neil Anderson of the National Science Foundation for their efforts in the coordination of this joint study.

This is contribution number 1605 from NOAA / Pacific Marine Environmental Laboratory.


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