. Die östliche Beringmeer Regal: Ozeanographie und Ressourcen/bearbeitet von Donald W. Haube und John A. Calder. Ozeanographie Bering Meer.. PON (pgN/l) 20 40 60 80 ICH PO C (> jgC/l) 5 Q 100, 150 200 100 NH4-N (pgatN/I) 0 1 2 3 4 I I T r Chlorophyll ich (; jg/|) 0 ^ ^^ 1. 2 3 4^?^ organische Materie 365 TEMPERATUR (°C) -1 0 1 2 3 4 5 6 7 1 I I-r der Salzgehalt (°/o. 32. 4 6 8 C/N-Verhältnis 200 400 600 800 1000 25 POC/CHLa Verhältnis 26 27 28 Abbildung 23-5. Vertikale Profile von partikulärem organischen Kohlenstoff und Stickstoff, C/N, a, POC/chl Chlorophyll a, NH4-N, Salzgehalt, und Sigma-t an der Station 6. Gefunden 6.

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. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Sea.. PON (pgN/l ) 20 40 60 80 I PO C (>jgC/l) 5Q 100, 150 200 100 NH4-N(pgatN / I) 0 1 2 3 4 I I T r CHLOROPHYLL i ( ;jg / | ) 0 _^_^^1 . 2 3 4 ^?^ Organic matter 365 TEMPERATURE ( °C ) -1 0 1 2 3 4 5 6 7 1 I I—r SALINITY ( °/o. 32. 4 6 8 C/N RATIO 200 400 600 800 1000 25 POC/ CHLa RATIO 26 27 28 Figure 23-5. Vertical profiles of particulate organic carbon and nitrogen, C/N, chlorophyll a, POC/chl. a, NH4-N, salinity, and sigma-t at station 6. found to be 6 in the euphotic layer, tending to increase rapidly to 10 with depth in the underlying waters, where an extremely rapid increase of the POC/chl. a value was also observed. The C/N value of the particulate matter tended to increase with depth to over 16 in the intermediate warm water at which depth the dissolved oxygen decreased to less than 0.5 ml/1. These data indicate that decay of particulate organic matter occurs in the intermediate as well as the deep waters of this region. No significance has yet been determined for the stepwise changes in POC or C/N values, but they are thought to be related to seasonal or yearly differences in production and distribution of organic matter. The continental shelf area The distribution profile of temperature in the transect along 57°N in 1975 over the continental shelf area indicates that a well-developed thermocline occurred in the water layers at approximately 30 m. Homogeneous distribution of temperature was observed in the layers above the thermocline through- out the stations, while a domelike cold water mass was found below the thermocline to the bottom in the areas centered at station 14 where the core temperature was —0.5 C. The formation and occurrence of the cold water mass has been described by several workers (Fleming 1955; Ohtani 1969; Kitano 1970a, b; Kinder and Schumacher, Chapter 4, this volume). The extremely cold water

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