Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay
It is instructive and essential to decouple the effects of biological and physical processes on the dissolved oxygen condition, in order to understand their contribution to the interannual variability of hypoxia in Chesapeake Bay since the 1980s. A conceptual bottom DO budget model is applied, using...
Published in: | Journal of Geophysical Research: Oceans |
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ftwilliammarycol:oai:scholarworks.wm.edu:vimsarticles-1249 2023-06-11T04:14:53+02:00 Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay Du, Jiabi Shen, Jian 2015-01-01T08:00:00Z application/pdf https://scholarworks.wm.edu/vimsarticles/250 doi: 10.1002/2014JC010422 https://scholarworks.wm.edu/context/vimsarticles/article/1249/viewcontent/2014JC010422.pdf unknown W&M ScholarWorks https://scholarworks.wm.edu/vimsarticles/250 doi: 10.1002/2014JC010422 https://scholarworks.wm.edu/context/vimsarticles/article/1249/viewcontent/2014JC010422.pdf VIMS Articles hypoxia vertical exchange time DO consumption rate nutrient loading climate variation estuary Physical Sciences Peer-Reviewed Articles Marine Biology text 2015 ftwilliammarycol https://doi.org/10.1002/2014JC010422 2023-05-04T17:56:11Z It is instructive and essential to decouple the effects of biological and physical processes on the dissolved oxygen condition, in order to understand their contribution to the interannual variability of hypoxia in Chesapeake Bay since the 1980s. A conceptual bottom DO budget model is applied, using the vertical exchange time scale (VET) to quantify the physical condition and net oxygen consumption rate to quantify biological activities. By combining observed DO data and modeled VET values along the main stem of the Chesapeake Bay, the monthly net bottom DO consumption rate was estimated for 1985-2012. The DO budget model results show that the interannual variations of physical conditions accounts for 88.8% of the interannual variations of observed DO. The high similarity between the VET spatial pattern and the observed DO suggests that physical processes play a key role in regulating the DO condition. Model results also show that long-term VET has a slight increase in summer, but no statistically significant trend is found. Correlations among southerly wind strength, North Atlantic Oscillation index, and VET demonstrate that the physical condition in the Chesapeake Bay is highly controlled by the large-scale climate variation. The relationship is most significant during the summer, when the southerly wind dominates throughout the Chesapeake Bay. The seasonal pattern of the averaged net bottom DO consumption rate ( B20) along the main stem coincides with that of the chlorophyll-a concentration. A significant correlation between nutrient loading and B20 suggests that the biological processes in April-May are most sensitive to the nutrient loading. Text North Atlantic North Atlantic oscillation W&M ScholarWorks Journal of Geophysical Research: Oceans 120 1 78 93 |
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hypoxia vertical exchange time DO consumption rate nutrient loading climate variation estuary Physical Sciences Peer-Reviewed Articles Marine Biology |
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hypoxia vertical exchange time DO consumption rate nutrient loading climate variation estuary Physical Sciences Peer-Reviewed Articles Marine Biology Du, Jiabi Shen, Jian Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
topic_facet |
hypoxia vertical exchange time DO consumption rate nutrient loading climate variation estuary Physical Sciences Peer-Reviewed Articles Marine Biology |
description |
It is instructive and essential to decouple the effects of biological and physical processes on the dissolved oxygen condition, in order to understand their contribution to the interannual variability of hypoxia in Chesapeake Bay since the 1980s. A conceptual bottom DO budget model is applied, using the vertical exchange time scale (VET) to quantify the physical condition and net oxygen consumption rate to quantify biological activities. By combining observed DO data and modeled VET values along the main stem of the Chesapeake Bay, the monthly net bottom DO consumption rate was estimated for 1985-2012. The DO budget model results show that the interannual variations of physical conditions accounts for 88.8% of the interannual variations of observed DO. The high similarity between the VET spatial pattern and the observed DO suggests that physical processes play a key role in regulating the DO condition. Model results also show that long-term VET has a slight increase in summer, but no statistically significant trend is found. Correlations among southerly wind strength, North Atlantic Oscillation index, and VET demonstrate that the physical condition in the Chesapeake Bay is highly controlled by the large-scale climate variation. The relationship is most significant during the summer, when the southerly wind dominates throughout the Chesapeake Bay. The seasonal pattern of the averaged net bottom DO consumption rate ( B20) along the main stem coincides with that of the chlorophyll-a concentration. A significant correlation between nutrient loading and B20 suggests that the biological processes in April-May are most sensitive to the nutrient loading. |
format |
Text |
author |
Du, Jiabi Shen, Jian |
author_facet |
Du, Jiabi Shen, Jian |
author_sort |
Du, Jiabi |
title |
Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
title_short |
Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
title_full |
Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
title_fullStr |
Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
title_full_unstemmed |
Decoupling the influence of biological and physical processes on the dissolved oxygen in the Chesapeake Bay |
title_sort |
decoupling the influence of biological and physical processes on the dissolved oxygen in the chesapeake bay |
publisher |
W&M ScholarWorks |
publishDate |
2015 |
url |
https://scholarworks.wm.edu/vimsarticles/250 https://scholarworks.wm.edu/context/vimsarticles/article/1249/viewcontent/2014JC010422.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
VIMS Articles |
op_relation |
https://scholarworks.wm.edu/vimsarticles/250 doi: 10.1002/2014JC010422 https://scholarworks.wm.edu/context/vimsarticles/article/1249/viewcontent/2014JC010422.pdf |
op_doi |
https://doi.org/10.1002/2014JC010422 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
1 |
container_start_page |
78 |
op_container_end_page |
93 |
_version_ |
1768371244683493376 |