Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea
Thesis (M.S.) University of Alaska Fairbanks, 2000 During 1997 and 1998, unusual physical conditions caused dramatic changes in the regional oceanic environment and function of the southeastern Bering Sea ecosystem. The changes in ecosystem function were examined using ¹³C and ¹⁵N tracer techniques....
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ftunivalaska:oai:scholarworks.alaska.edu:11122/5096 2023-06-11T04:10:38+02:00 Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea Rho, TaeKeun 2000-12 http://hdl.handle.net/11122/5096 en_US eng http://hdl.handle.net/11122/5096 Nitrates Environmental aspects Bering Sea Ammonium nitrate Urea Ecological disturbances Oceanography Marine ecology Thesis ms 2000 ftunivalaska 2023-05-11T17:54:52Z Thesis (M.S.) University of Alaska Fairbanks, 2000 During 1997 and 1998, unusual physical conditions caused dramatic changes in the regional oceanic environment and function of the southeastern Bering Sea ecosystem. The changes in ecosystem function were examined using ¹³C and ¹⁵N tracer techniques. In 1997, unusually clear and calm conditions allowed an ice-related early bloom over the middle shelf of the southeastern Bering Sea and resulted in nitrate uptake below the pycnocline. In 1998, the duration of phytoplankton growth was extended by warm temperatures and frequent storms that resulted in slow growth of phytoplankton and prevented rapid utilization of nitrate over the shelf. In coccolithophorid bloom regions, ammonium concentrations were high (>3 uM), while nitrate concentrations had a larger range (O.1-10.8 uM). Nitrate utilization rates, which estimate 'new' production, were similar for both years and were somewhate greater (ca. 30%) than those observed during the 70's and 80's PROBES studies. The fate of primary production may have differed in 1997 and 1998. Thesis Bering Sea Alaska University of Alaska: ScholarWorks@UA Bering Sea Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Nitrates Environmental aspects Bering Sea Ammonium nitrate Urea Ecological disturbances Oceanography Marine ecology |
spellingShingle |
Nitrates Environmental aspects Bering Sea Ammonium nitrate Urea Ecological disturbances Oceanography Marine ecology Rho, TaeKeun Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
topic_facet |
Nitrates Environmental aspects Bering Sea Ammonium nitrate Urea Ecological disturbances Oceanography Marine ecology |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2000 During 1997 and 1998, unusual physical conditions caused dramatic changes in the regional oceanic environment and function of the southeastern Bering Sea ecosystem. The changes in ecosystem function were examined using ¹³C and ¹⁵N tracer techniques. In 1997, unusually clear and calm conditions allowed an ice-related early bloom over the middle shelf of the southeastern Bering Sea and resulted in nitrate uptake below the pycnocline. In 1998, the duration of phytoplankton growth was extended by warm temperatures and frequent storms that resulted in slow growth of phytoplankton and prevented rapid utilization of nitrate over the shelf. In coccolithophorid bloom regions, ammonium concentrations were high (>3 uM), while nitrate concentrations had a larger range (O.1-10.8 uM). Nitrate utilization rates, which estimate 'new' production, were similar for both years and were somewhate greater (ca. 30%) than those observed during the 70's and 80's PROBES studies. The fate of primary production may have differed in 1997 and 1998. |
format |
Thesis |
author |
Rho, TaeKeun |
author_facet |
Rho, TaeKeun |
author_sort |
Rho, TaeKeun |
title |
Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
title_short |
Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
title_full |
Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
title_fullStr |
Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
title_full_unstemmed |
Carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the Bering Sea |
title_sort |
carbon and nitrogen uptake dynamics during 1997 and 1998 anomalous conditions in the bering sea |
publishDate |
2000 |
url |
http://hdl.handle.net/11122/5096 |
geographic |
Bering Sea Fairbanks |
geographic_facet |
Bering Sea Fairbanks |
genre |
Bering Sea Alaska |
genre_facet |
Bering Sea Alaska |
op_relation |
http://hdl.handle.net/11122/5096 |
_version_ |
1768385176722735104 |