Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century
A chlorophyll a hindcast in the Madeira Basin from 1871 to 2008 was used to analyze the long-term variability in the oligotrophic, subtropical gyres in relation to the climate change of the last century. The deep chlorophyll maximum (DCM), as dominant pattern of the chlorophyll a field, showed a fas...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | https://oceanrep.geomar.de/id/eprint/29763/ https://oceanrep.geomar.de/id/eprint/29763/1/jgrg20336-1.pdf https://doi.org/10.1002/2014JG002692 |
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ftoceanrep:oai:oceanrep.geomar.de:29763 2023-05-15T17:33:42+02:00 Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century Fründt, B. Dippner, J. W. Schulz-Bull, D. E. Waniek, Joanna J. 2015 text https://oceanrep.geomar.de/id/eprint/29763/ https://oceanrep.geomar.de/id/eprint/29763/1/jgrg20336-1.pdf https://doi.org/10.1002/2014JG002692 en eng AGU https://oceanrep.geomar.de/id/eprint/29763/1/jgrg20336-1.pdf Fründt, B., Dippner, J. W., Schulz-Bull, D. E. and Waniek, J. J. (2015) Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century. Open Access Journal of Geophysical Research: Biogeosciences, 120 (2). pp. 246-253. DOI 10.1002/2014JG002692 <https://doi.org/10.1002/2014JG002692>. doi:10.1002/2014JG002692 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.1002/2014JG002692 2023-04-07T15:20:54Z A chlorophyll a hindcast in the Madeira Basin from 1871 to 2008 was used to analyze the long-term variability in the oligotrophic, subtropical gyres in relation to the climate change of the last century. The deep chlorophyll maximum (DCM), as dominant pattern of the chlorophyll a field, showed a fast decrease in its strength in the 1940s. An absolute minimum was reached between 1967 and 1973 when no DCM established with a recovering to the end of the time series. Long-term variability of the DCM was related to the North Atlantic Oscillation with a time delay of 9 years. The marked decrease in the 1940s was correlated to the drop of the solar radiation in transition from early brightening to global dimming. Caused by the influence of the solar radiation and maybe related to increasing global temperatures in the last century, the integrated chlorophyll a concentration decreased by about 0.7 mg m−2 in 2008 compared to 1871. The high-resolved chlorophyll a hindcast allowed an estimation of the carbon uptake by the ocean due to primary production in the euphotic zone. A rough calculation over the area of the global subtropical oceans showed 700 megaton less carbon uptake in 2008. Article in Journal/Newspaper North Atlantic North Atlantic oscillation OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Geophysical Research: Biogeosciences 120 2 246 253 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A chlorophyll a hindcast in the Madeira Basin from 1871 to 2008 was used to analyze the long-term variability in the oligotrophic, subtropical gyres in relation to the climate change of the last century. The deep chlorophyll maximum (DCM), as dominant pattern of the chlorophyll a field, showed a fast decrease in its strength in the 1940s. An absolute minimum was reached between 1967 and 1973 when no DCM established with a recovering to the end of the time series. Long-term variability of the DCM was related to the North Atlantic Oscillation with a time delay of 9 years. The marked decrease in the 1940s was correlated to the drop of the solar radiation in transition from early brightening to global dimming. Caused by the influence of the solar radiation and maybe related to increasing global temperatures in the last century, the integrated chlorophyll a concentration decreased by about 0.7 mg m−2 in 2008 compared to 1871. The high-resolved chlorophyll a hindcast allowed an estimation of the carbon uptake by the ocean due to primary production in the euphotic zone. A rough calculation over the area of the global subtropical oceans showed 700 megaton less carbon uptake in 2008. |
format |
Article in Journal/Newspaper |
author |
Fründt, B. Dippner, J. W. Schulz-Bull, D. E. Waniek, Joanna J. |
spellingShingle |
Fründt, B. Dippner, J. W. Schulz-Bull, D. E. Waniek, Joanna J. Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
author_facet |
Fründt, B. Dippner, J. W. Schulz-Bull, D. E. Waniek, Joanna J. |
author_sort |
Fründt, B. |
title |
Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
title_short |
Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
title_full |
Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
title_fullStr |
Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
title_full_unstemmed |
Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century |
title_sort |
chlorophyll a reconstruction from in situ measurements: 2. marked carbon uptake decrease in the last century |
publisher |
AGU |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/29763/ https://oceanrep.geomar.de/id/eprint/29763/1/jgrg20336-1.pdf https://doi.org/10.1002/2014JG002692 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://oceanrep.geomar.de/id/eprint/29763/1/jgrg20336-1.pdf Fründt, B., Dippner, J. W., Schulz-Bull, D. E. and Waniek, J. J. (2015) Chlorophyll a reconstruction from in situ measurements: 2. Marked carbon uptake decrease in the last century. Open Access Journal of Geophysical Research: Biogeosciences, 120 (2). pp. 246-253. DOI 10.1002/2014JG002692 <https://doi.org/10.1002/2014JG002692>. doi:10.1002/2014JG002692 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2014JG002692 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
120 |
container_issue |
2 |
container_start_page |
246 |
op_container_end_page |
253 |
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1766132283111112704 |