A cooperative study of upper ocean particulate fluxes during Ocean ...
A cooperative study of upper ocean particulate fluxes during Ocean Drilling Program Leg 119 to Prydz Bay D.C. BIGGS and S.P. BEIKowIJz Department of Oceanography Texas A&M University College Station, Texas 77843
J. BARRON, B. LARSEN, J. BALDAUF and 119 SCIENTIFIC PARTY
TUE OCEAN DRILLING PROGRAM LEG
To continue and extend investigations of fluxes of natural particulate materials from southern ocean summer surface waters that we began in 1987 during Ocean Drilling Program leg 113 (Biggs et al. 1988), we deployed drifting sediment traps on 11 occasions for 20-37 hours each during Ocean Drilling Program leg 119 in January and February 1988. A 3-trap array with conical 0.16-square-meter traps suspended 50 meters, 100 meters, and 200 meters below the surface was launched, tracked, and recovered from the ice escort vessel Macrsk Master when permitted by its schedule of ice-tending duties and logistic suport for the drillship. Most of these deployments took place in Prydz Bay (four consecutive collections from site 739; three from site 740; one from site 741; and two from site 742; see Fryxell 1988). We also got a 1-day collection over the south Kerguelan Plateau (site 744) before the Master was released from escort service. To see how the depth of the mixed layer and phytoplankton standing stocks varied between our collection sites, we used an internal-recording Seabird "SeacatClD-19" to profile the temperature-salinity characteristics of the upper 200 meters of the water column from the Master, and we collected water from
1989 RFv1uw
5 depths with 5-liter Niskin bottles. Chlorophyll was measured on board by standard fluorometric method (Parsons, Maita, and Lalli 1985), but samples were also returned to Texas A&M University for detailed characterization of algal pigments and their degradation products by high-performance liquid chromatography. Our vertical temperature/salinity profiles were supplemented with expendable bathythermograph drops from the drillship while the Resolution was underway between sites. Following the same analytical protocols as they had used to process the Ocean Drilling Program leg 113 samples from austral summer 1987, researchers from several institutions are sharing splits of the trapped material to characterize its organic carbon, organic nitrogen, amino acid, and carbon-13/nitrogen15 composition (S.A. Macko, Memorial University of Newfoundland; M.A. Altabet, Woods Hole Oceanographic Institution); biogenic silica content (D.J. DeMaster, North Carolina State University); and chlorophylls and their degradation products (R.R. Bidigare, M.E. Ondrusek, and Il Noh Texas A&M University). Phytoplankton species composition' will be described by D.M. Stockwell and S.H. Kang, who sailed on the Master as field team for a companion upper ocean science program to describe the taxonomy of suspended and sinking algal material (G.A. Fryxell, principal investigator). The leg 119 sediment-trapping program was sponsored by National Science Foundation grant DPP 86-02762 to D.C. Biggs and by the U.S. Science Advisory Committee to Joint Oceanographic Institutions, Inc. Ship time on board the Master was provided by the Ocean Drilling Program. References Biggs, D.C., S.F. Berkowitz, M.A. Altabet, R.R. Bidigare, D.J. DcMaster, R.B. Dunbar, A. Leventer, S.A. Macko, C.A. Nittrouer, and M.E. Ondrusek. 1988. A cooperative study of upper-ocean particulate fluxes in the Weddell Sea. In Proceedings of the Ocean Drilling Program, Part A Leg 113 (Sites 689-697).
Fryxell, GA., and shipboard party. 1988. Southern Indian Ocean cruise of the JO1DES Resolution (Ocean Drilling Program leg 119). Antarctic Journal of the U.S., 23(5), 128-129. Parsons, T.R., Y. Maita, and C.M. Lalli. 1985. A mimanual of chemical and biological methods for seawater amiahsms. New York: Pergamon Press.
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J. BARRON, B. LARSEN, J. BALDAUF and 119 SCIENTIFIC PARTY
TUE OCEAN DRILLING PROGRAM LEG
To continue and extend investigations of fluxes of natural particulate materials from southern ocean summer surface waters that we began in 1987 during Ocean Drilling Program leg 113 (Biggs et al. 1988), we deployed drifting sediment traps on 11 occasions for 20-37 hours each during Ocean Drilling Program leg 119 in January and February 1988. A 3-trap array with conical 0.16-square-meter traps suspended 50 meters, 100 meters, and 200 meters below the surface was launched, tracked, and recovered from the ice escort vessel Macrsk Master when permitted by its schedule of ice-tending duties and logistic suport for the drillship. Most of these deployments took place in Prydz Bay (four consecutive collections from site 739; three from site 740; one from site 741; and two from site 742; see Fryxell 1988). We also got a 1-day collection over the south Kerguelan Plateau (site 744) before the Master was released from escort service. To see how the depth of the mixed layer and phytoplankton standing stocks varied between our collection sites, we used an internal-recording Seabird "SeacatClD-19" to profile the temperature-salinity characteristics of the upper 200 meters of the water column from the Master, and we collected water from
1989 RFv1uw
5 depths with 5-liter Niskin bottles. Chlorophyll was measured on board by standard fluorometric method (Parsons, Maita, and Lalli 1985), but samples were also returned to Texas A&M University for detailed characterization of algal pigments and their degradation products by high-performance liquid chromatography. Our vertical temperature/salinity profiles were supplemented with expendable bathythermograph drops from the drillship while the Resolution was underway between sites. Following the same analytical protocols as they had used to process the Ocean Drilling Program leg 113 samples from austral summer 1987, researchers from several institutions are sharing splits of the trapped material to characterize its organic carbon, organic nitrogen, amino acid, and carbon-13/nitrogen15 composition (S.A. Macko, Memorial University of Newfoundland; M.A. Altabet, Woods Hole Oceanographic Institution); biogenic silica content (D.J. DeMaster, North Carolina State University); and chlorophylls and their degradation products (R.R. Bidigare, M.E. Ondrusek, and Il Noh Texas A&M University). Phytoplankton species composition' will be described by D.M. Stockwell and S.H. Kang, who sailed on the Master as field team for a companion upper ocean science program to describe the taxonomy of suspended and sinking algal material (G.A. Fryxell, principal investigator). The leg 119 sediment-trapping program was sponsored by National Science Foundation grant DPP 86-02762 to D.C. Biggs and by the U.S. Science Advisory Committee to Joint Oceanographic Institutions, Inc. Ship time on board the Master was provided by the Ocean Drilling Program. References Biggs, D.C., S.F. Berkowitz, M.A. Altabet, R.R. Bidigare, D.J. DcMaster, R.B. Dunbar, A. Leventer, S.A. Macko, C.A. Nittrouer, and M.E. Ondrusek. 1988. A cooperative study of upper-ocean particulate fluxes in the Weddell Sea. In Proceedings of the Ocean Drilling Program, Part A Leg 113 (Sites 689-697).
Fryxell, GA., and shipboard party. 1988. Southern Indian Ocean cruise of the JO1DES Resolution (Ocean Drilling Program leg 119). Antarctic Journal of the U.S., 23(5), 128-129. Parsons, T.R., Y. Maita, and C.M. Lalli. 1985. A mimanual of chemical and biological methods for seawater amiahsms. New York: Pergamon Press.
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