PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER
Abstract: Oceanographic structure, nutrient concentration, and chlorophyll a concentration were surveyed from 55'N to 59'N along 166'W on the southeastern shelf of the Bering Sea during mid to late July of 1994, 1995, and 1996. The present results show a consistent trend that, in ever...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.503.9360 2023-05-15T15:43:21+02:00 PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER Tsuneo Odate Naonobu Shiga Sei-ichi Saitoh Takako Miyoi Shogo Takagi The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9360 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9360 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf key words Bering Sea shelf phytoplankton abundance physical properties text ftciteseerx 2016-01-08T09:16:35Z Abstract: Oceanographic structure, nutrient concentration, and chlorophyll a concentration were surveyed from 55'N to 59'N along 166'W on the southeastern shelf of the Bering Sea during mid to late July of 1994, 1995, and 1996. The present results show a consistent trend that, in every year, high chlorophyll a concentration occurred in the outer shelf domain around 55'00'N, as well as the coastal shelf domain, and that the concentrations were usually low in the central shelf domain although large yearly variation occurred. The high phytoplankton abundance in the southern outer shelf domain related to relatively high salinity water, which contained more nitrate than the central shelf domain water. It is suggested that the high abundance is maintained by a continuous supply of nutrients caused by interaction between the ocean current from the open water of the North Pacific and the bottom topography in the vicinity of Unimak Pass. On the other hand, alternative high chlorophyll a stock was observed in the coastal shelf domain, where the sea floor depth was about 4 0 m and vertically homogenous water properties occurred. This suggests that the nutrient supply from the bottom maintains the high phytoplankton abundance. In the central shelf domain, chlorophyll a concentrations less than 1.0pg I 1 were usually observed between 55'30'N and 58'30'N in 1995 and 1996. In 1994, however, chlorophyll a concentrations of 1.0 to 2.0pg I- I were widely distributed. The slightly high concentrations coincided with a weak pycnocline and occurrence of cold bottom water, which contained high nitrate. It is suggested that phytoplan-kton abundance may be low when the pycnocline is well developed or the cold bottom water does not transport a large amount of nutrients in the central shelf domain of the southeastern Bering Sea. Text Bering Sea Unknown Bering Sea Pacific |
institution |
Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
topic |
key words Bering Sea shelf phytoplankton abundance physical properties |
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key words Bering Sea shelf phytoplankton abundance physical properties Tsuneo Odate Naonobu Shiga Sei-ichi Saitoh Takako Miyoi Shogo Takagi PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
topic_facet |
key words Bering Sea shelf phytoplankton abundance physical properties |
description |
Abstract: Oceanographic structure, nutrient concentration, and chlorophyll a concentration were surveyed from 55'N to 59'N along 166'W on the southeastern shelf of the Bering Sea during mid to late July of 1994, 1995, and 1996. The present results show a consistent trend that, in every year, high chlorophyll a concentration occurred in the outer shelf domain around 55'00'N, as well as the coastal shelf domain, and that the concentrations were usually low in the central shelf domain although large yearly variation occurred. The high phytoplankton abundance in the southern outer shelf domain related to relatively high salinity water, which contained more nitrate than the central shelf domain water. It is suggested that the high abundance is maintained by a continuous supply of nutrients caused by interaction between the ocean current from the open water of the North Pacific and the bottom topography in the vicinity of Unimak Pass. On the other hand, alternative high chlorophyll a stock was observed in the coastal shelf domain, where the sea floor depth was about 4 0 m and vertically homogenous water properties occurred. This suggests that the nutrient supply from the bottom maintains the high phytoplankton abundance. In the central shelf domain, chlorophyll a concentrations less than 1.0pg I 1 were usually observed between 55'30'N and 58'30'N in 1995 and 1996. In 1994, however, chlorophyll a concentrations of 1.0 to 2.0pg I- I were widely distributed. The slightly high concentrations coincided with a weak pycnocline and occurrence of cold bottom water, which contained high nitrate. It is suggested that phytoplan-kton abundance may be low when the pycnocline is well developed or the cold bottom water does not transport a large amount of nutrients in the central shelf domain of the southeastern Bering Sea. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Tsuneo Odate Naonobu Shiga Sei-ichi Saitoh Takako Miyoi Shogo Takagi |
author_facet |
Tsuneo Odate Naonobu Shiga Sei-ichi Saitoh Takako Miyoi Shogo Takagi |
author_sort |
Tsuneo Odate |
title |
PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
title_short |
PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
title_full |
PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
title_fullStr |
PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
title_full_unstemmed |
PHYSICAL PROPERTIES ON THE SOUTHEASTERN SHELF O F THE BERING SEA IN SUMMER |
title_sort |
physical properties on the southeastern shelf o f the bering sea in summer |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9360 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.9360 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1999-Odate.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766377441062813696 |