Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication?
The Boknis Eck (BE) time series station, initiated in 1957, is one of the longest-operated time series stations worldwide. We present the first statistical evaluation of a data set of nine physical, chemical and biological parameters in the period of 1957–2013. In the past three to five decades, all...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2014
|
Subjects: | |
Online Access: | https://doi.org/10.5194/bg-11-6323-2014 https://noa.gwlb.de/receive/cop_mods_00018380 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018335/bg-11-6323-2014.pdf https://bg.copernicus.org/articles/11/6323/2014/bg-11-6323-2014.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00018380 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00018380 2023-05-15T18:18:19+02:00 Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? Lennartz, S. T. Lehmann, A. Herrford, J. Malien, F. Hansen, H.-P. Biester, H. Bange, H. W. 2014-11 electronic https://doi.org/10.5194/bg-11-6323-2014 https://noa.gwlb.de/receive/cop_mods_00018380 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018335/bg-11-6323-2014.pdf https://bg.copernicus.org/articles/11/6323/2014/bg-11-6323-2014.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-6323-2014 https://noa.gwlb.de/receive/cop_mods_00018380 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018335/bg-11-6323-2014.pdf https://bg.copernicus.org/articles/11/6323/2014/bg-11-6323-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/bg-11-6323-2014 2022-02-08T22:53:14Z The Boknis Eck (BE) time series station, initiated in 1957, is one of the longest-operated time series stations worldwide. We present the first statistical evaluation of a data set of nine physical, chemical and biological parameters in the period of 1957–2013. In the past three to five decades, all of the measured parameters underwent significant long-term changes. Most striking is an ongoing decline in bottom water oxygen concentration, despite a significant decrease of nutrient and chlorophyll a concentrations. Temperature-enhanced oxygen consumption in the bottom water and a prolongation of the stratification period are discussed as possible reasons for the ongoing oxygen decline despite declining eutrophication. Observations at the BE station were compared with model output of the Kiel Baltic Sea Ice Ocean Model (BSIOM). Reproduced trends were in good agreement with observed trends for temperature and oxygen, but generally the oxygen concentration at the bottom has been overestimated. Article in Journal/Newspaper Sea ice Niedersächsisches Online-Archiv NOA Biogeosciences 11 22 6323 6339 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Lennartz, S. T. Lehmann, A. Herrford, J. Malien, F. Hansen, H.-P. Biester, H. Bange, H. W. Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
topic_facet |
article Verlagsveröffentlichung |
description |
The Boknis Eck (BE) time series station, initiated in 1957, is one of the longest-operated time series stations worldwide. We present the first statistical evaluation of a data set of nine physical, chemical and biological parameters in the period of 1957–2013. In the past three to five decades, all of the measured parameters underwent significant long-term changes. Most striking is an ongoing decline in bottom water oxygen concentration, despite a significant decrease of nutrient and chlorophyll a concentrations. Temperature-enhanced oxygen consumption in the bottom water and a prolongation of the stratification period are discussed as possible reasons for the ongoing oxygen decline despite declining eutrophication. Observations at the BE station were compared with model output of the Kiel Baltic Sea Ice Ocean Model (BSIOM). Reproduced trends were in good agreement with observed trends for temperature and oxygen, but generally the oxygen concentration at the bottom has been overestimated. |
format |
Article in Journal/Newspaper |
author |
Lennartz, S. T. Lehmann, A. Herrford, J. Malien, F. Hansen, H.-P. Biester, H. Bange, H. W. |
author_facet |
Lennartz, S. T. Lehmann, A. Herrford, J. Malien, F. Hansen, H.-P. Biester, H. Bange, H. W. |
author_sort |
Lennartz, S. T. |
title |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
title_short |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
title_full |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
title_fullStr |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
title_full_unstemmed |
Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication? |
title_sort |
long-term trends at the boknis eck time series station (baltic sea), 1957–2013: does climate change counteract the decline in eutrophication? |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-6323-2014 https://noa.gwlb.de/receive/cop_mods_00018380 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018335/bg-11-6323-2014.pdf https://bg.copernicus.org/articles/11/6323/2014/bg-11-6323-2014.pdf |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-6323-2014 https://noa.gwlb.de/receive/cop_mods_00018380 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018335/bg-11-6323-2014.pdf https://bg.copernicus.org/articles/11/6323/2014/bg-11-6323-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-11-6323-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
22 |
container_start_page |
6323 |
op_container_end_page |
6339 |
_version_ |
1766194855189413888 |