Warm core Ring particulate

Montoya, J. P., Wiebe, P. H., and McCarthy, J. J. (1992). Natural abundance of 15 N in particulate nitrogen and zooplankton in the Gulf Stream region and Warm-Core Ring 86A. Deep Sea Res. 39 (Suppl. 1), S363-S392. 

We will present flow-rate, particulate dry weight, and particulate-calcium data from selected MULVFS and LVFS stations to (1) further document the sampling performance of the MULVFS and (2) demonstrate one application of large-volume in situ filtration to understanding the processes governing the distributions of particulate matter in a productive environment. Detailed presentation and interpretation of warm core ring data are outside the scope of this chapter. 

An example of the usefulness of large-volume in situ filtration is illustrated by the particulate Ca data collected in the interdisciplinary Warm Core Rings program. Particulate Ca in the < 53-pm size fraction showed a factor-of-three drop in concentration in the thermostad of WCR 82-B be-... 

Saino T. 1992. N and C natural abundances in suspended particulate organic matter from Kuroshio warm-core ring. Deep-Sea Res. 39 5347-5362. 

Altabet M.A. and Bishop J.K.B. 1992. Differences in particulate nitrogen concentration and isotopic composition for samples collected by bottles and large-volume pumps in Gulf Stream warm-core rings and the Sargasso Sea. Deep-Sea Res. 139 5405-5417. 

Figure 8. (A) Flow rate vs. time during filtration of shallow and deep water at a station in Warm Core Gulf Stream Ring 82-H. (B) Flow-rate decay constant vs. total particulate matter dry-weight concentration for all samples deeper than 100 m. The linear fit to the data is pg/L = 53k + 7.6 with a correlation coefficient of 0.914 and s(y) = 4/jLg/L. Scatter in the data is attributed to additional factors such as size distribution or chemical differences among samples. (C) Filtration performance of theMULVFS in different environments.

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