The character and motion of suspended particulate matter over the shelf edge and upper slope off Cape Cod

Total sediment biomass and preliminary estimates of organic carbon residence time in deep-sea benthos

“…The carbonate analyses were done by Rick Fairbanks using a VG Isogas 903 mass spectrometer or by coulometric analysis using a Model 5010 C 0 2 Coulometer produced by Coulometrics, Inc., in the laboratory of Taro Takahashi, both at L-DGO. There was good agreement between the two (Biscaye et al 1988).…”

“…The details of the shelf break trap array (BNL in Fig. 2) are reported by Rowe et al (1986); those of the LDGO arrays by Biscaye et al (1988). However, the only data we utilize from that entire set of moorings are the fluxes into the deepest or 50 m-off-bottom traps on moorings in water depths of 500, 1250, and 2300 m, as indicated (LDGO) in Fig.…”

“…2) were improved over the earlier designs in several ways described by Biscaye et al (1988). In order to provide the capability for long timeseries, these traps terminated into a carousel of 170 ml sample tubes which are rotated at preset intervals.…”

“…240 Elemental Analyzer for carbon and nitrogen. The analyses of the LDGO samples were handled in a slightly different manner because Biscaye et al (1988) were concerned that acidification would hydrolize organic compounds which would then be lost from the carbon and nitrogen analysis. They opted for analysis of total carbon in one aliquot, separate analysis of carbonate in another and then defining organic carbon as the difference between the two.…”

“…They credit the design to Baker & Milburn (1983). All the LDGO traps duplicated the original design, but the cylinder opening was increased from 324 to 729 cm2, The SEEP-LDGO traps (Biscaye et al 1988) A saline solution of 10 % sodium azide was put into the sample tubes to inhibit biological activity in the LDGO traps and in the IFREMER cone trap used on the Hatteras Abyssal Plain. No poison was used in the other cylinder traps, but their deployment times were relatively short and/or in very deep water where rates of heterotrophic metabolism might be considered slow.…”