Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing
The Black Sea is a unique, stratified, enclosed ocean basin of great importance. The water column provides a wealth of information concerning aerobic-anaerobic biogeochemistry, the responses of which can have links to anthropogenic and climatic forcing. Herein, we synthesize dissolved oxygen (DO) an...
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ftlouisianastuir:oai:repository.lsu.edu:biosci_pubs-3828 2024-09-15T18:23:51+00:00 Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing Pakhomova, S. Vinogradova, E. Yakushev, E. Zatsepin, A. Shtereva, G. Chasovnikov, V. Podymov, O. 2014-03-01T08:00:00Z application/pdf https://repository.lsu.edu/biosci_pubs/2829 https://doi.org/10.1016/j.ecss.2013.10.006 https://repository.lsu.edu/context/biosci_pubs/article/3828/viewcontent/2829.pdf unknown LSU Scholarly Repository https://repository.lsu.edu/biosci_pubs/2829 doi:10.1016/j.ecss.2013.10.006 https://repository.lsu.edu/context/biosci_pubs/article/3828/viewcontent/2829.pdf Faculty Publications Black Sea Climatic changes Dissolved oxygen Hydrogen sulphide Nutrient cycles text 2014 ftlouisianastuir https://doi.org/10.1016/j.ecss.2013.10.006 2024-08-08T04:27:15Z The Black Sea is a unique, stratified, enclosed ocean basin of great importance. The water column provides a wealth of information concerning aerobic-anaerobic biogeochemistry, the responses of which can have links to anthropogenic and climatic forcing. Herein, we synthesize dissolved oxygen (DO) and nutrient data (phosphate, dissolved inorganic nitrogen (DIN), and silicate) for the period 1984-2010 received in the northeastern and western areas of the Sea. In the subsequent analysis we discuss the role of anthropogenic and climatic forcing in the context of the Black Sea oxic layer and oxic/anoxic interface characteristics.The DO concentration in the surface layer and in the Cold Intermediate Layer (CIL) decreased in warm periods and increased in cold periods, correlating to North Atlantic Oscillation (NAO) index variation. The biogeochemical regime of the Black Sea oxygenated upper layer has notably changed since 1999. After 1999 DO concentration in the CIL decreased by 20% while the concentrations in the surface layer changed very little. This provides evidence that the CIL waters were not fully replenished during the winters of the last decade.The nutrient concentrations (DIN and phosphate) in the surface layer decreased significantly in the 2000s compared with the 1980s-1990s. This decrease is regarded as improvement of the Black Sea ecosystem state. Oxygen and nutrient dynamics in the middle pycnocline have been decoupled since 1999. Presently physical (climatic) forcing is the dominant affecting factor controlling the Sea oxygen and nitrogen regime. © 2013 Elsevier Ltd. Text North Atlantic North Atlantic oscillation LSU Digital Commons (Louisiana State University) Estuarine, Coastal and Shelf Science 140 134 145 |
institution |
Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
Black Sea Climatic changes Dissolved oxygen Hydrogen sulphide Nutrient cycles |
spellingShingle |
Black Sea Climatic changes Dissolved oxygen Hydrogen sulphide Nutrient cycles Pakhomova, S. Vinogradova, E. Yakushev, E. Zatsepin, A. Shtereva, G. Chasovnikov, V. Podymov, O. Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
topic_facet |
Black Sea Climatic changes Dissolved oxygen Hydrogen sulphide Nutrient cycles |
description |
The Black Sea is a unique, stratified, enclosed ocean basin of great importance. The water column provides a wealth of information concerning aerobic-anaerobic biogeochemistry, the responses of which can have links to anthropogenic and climatic forcing. Herein, we synthesize dissolved oxygen (DO) and nutrient data (phosphate, dissolved inorganic nitrogen (DIN), and silicate) for the period 1984-2010 received in the northeastern and western areas of the Sea. In the subsequent analysis we discuss the role of anthropogenic and climatic forcing in the context of the Black Sea oxic layer and oxic/anoxic interface characteristics.The DO concentration in the surface layer and in the Cold Intermediate Layer (CIL) decreased in warm periods and increased in cold periods, correlating to North Atlantic Oscillation (NAO) index variation. The biogeochemical regime of the Black Sea oxygenated upper layer has notably changed since 1999. After 1999 DO concentration in the CIL decreased by 20% while the concentrations in the surface layer changed very little. This provides evidence that the CIL waters were not fully replenished during the winters of the last decade.The nutrient concentrations (DIN and phosphate) in the surface layer decreased significantly in the 2000s compared with the 1980s-1990s. This decrease is regarded as improvement of the Black Sea ecosystem state. Oxygen and nutrient dynamics in the middle pycnocline have been decoupled since 1999. Presently physical (climatic) forcing is the dominant affecting factor controlling the Sea oxygen and nitrogen regime. © 2013 Elsevier Ltd. |
format |
Text |
author |
Pakhomova, S. Vinogradova, E. Yakushev, E. Zatsepin, A. Shtereva, G. Chasovnikov, V. Podymov, O. |
author_facet |
Pakhomova, S. Vinogradova, E. Yakushev, E. Zatsepin, A. Shtereva, G. Chasovnikov, V. Podymov, O. |
author_sort |
Pakhomova, S. |
title |
Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
title_short |
Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
title_full |
Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
title_fullStr |
Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
title_full_unstemmed |
Interannual variability of the Black Sea Proper oxygen and nutrients regime: The role of climatic and anthropogenic forcing |
title_sort |
interannual variability of the black sea proper oxygen and nutrients regime: the role of climatic and anthropogenic forcing |
publisher |
LSU Scholarly Repository |
publishDate |
2014 |
url |
https://repository.lsu.edu/biosci_pubs/2829 https://doi.org/10.1016/j.ecss.2013.10.006 https://repository.lsu.edu/context/biosci_pubs/article/3828/viewcontent/2829.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Faculty Publications |
op_relation |
https://repository.lsu.edu/biosci_pubs/2829 doi:10.1016/j.ecss.2013.10.006 https://repository.lsu.edu/context/biosci_pubs/article/3828/viewcontent/2829.pdf |
op_doi |
https://doi.org/10.1016/j.ecss.2013.10.006 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
140 |
container_start_page |
134 |
op_container_end_page |
145 |
_version_ |
1810464133822283776 |