Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring
Large aggregations of the copepod Calanus finmarchicus occur each spring in the shelf-slope-oceanic regions off the Lofoten-Vesteralen Islands where productive fisheries have traditionally supported local economies. The retention and off-shelf transport of populations of C. finmarchicus populations...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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AMER GEOPHYSICAL UNION
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Online Access: | http://ir.qdio.ac.cn/handle/337002/176200 http://ir.qdio.ac.cn/handle/337002/176201 https://doi.org/10.1029/2021JC017408 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/176201 2023-05-15T15:47:52+02:00 Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring Dong, Huizi Zhou, Meng Hu, Ziyuan Zhang, Zhaoru Zhong, Yisen Basedow, Sunnje L. Smith, Walker O., Jr. 2021-08-01 http://ir.qdio.ac.cn/handle/337002/176200 http://ir.qdio.ac.cn/handle/337002/176201 https://doi.org/10.1029/2021JC017408 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS http://ir.qdio.ac.cn/handle/337002/176200 http://ir.qdio.ac.cn/handle/337002/176201 doi:10.1029/2021JC017408 transport barrier Calanus finmarchicus Lagrangian coherent structures remote sensing energy conversion rate Oceanography 期刊论文 2021 ftchinacasciocas https://doi.org/10.1029/2021JC017408 2022-06-27T05:46:12Z Large aggregations of the copepod Calanus finmarchicus occur each spring in the shelf-slope-oceanic regions off the Lofoten-Vesteralen Islands where productive fisheries have traditionally supported local economies. The retention and off-shelf transport of populations of C. finmarchicus populations were studied by analyzing ocean color remote sensing, satellite altimetry data, and Lagrangian Coherent Structures (LCS) between 2010 and 2019. Our analysis revealed the existence of a transport barrier reoccurring at the shelf break that retains C. finmarchicus on the shelf for 30-70 days in the spring when C. finmarchicus were seasonally ascending to the surface layer. The analysis of baroclinic and barotropic energy conversions indicated that the topographically steered Norwegian Atlantic Current is the primary mechanism in the formation of the transport barrier, which restricts exchanges of C. finmarchicus populations between shelf and oceanic waters. In the mid- to late April, an increase in baroclinicity leads to an increase in mesoscale eddies generated on the shelf break near Lofoten-Vesteralen Islands, breaking down transport barriers and causing off-shelf transport of C. finmarchicus. The transport barrier predictably reoccurs in early spring which supports the entrapment of C. finmarchicus in the shelf region. Report Calanus finmarchicus Lofoten Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Lofoten Journal of Geophysical Research: Oceans 126 8 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
transport barrier Calanus finmarchicus Lagrangian coherent structures remote sensing energy conversion rate Oceanography |
spellingShingle |
transport barrier Calanus finmarchicus Lagrangian coherent structures remote sensing energy conversion rate Oceanography Dong, Huizi Zhou, Meng Hu, Ziyuan Zhang, Zhaoru Zhong, Yisen Basedow, Sunnje L. Smith, Walker O., Jr. Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
topic_facet |
transport barrier Calanus finmarchicus Lagrangian coherent structures remote sensing energy conversion rate Oceanography |
description |
Large aggregations of the copepod Calanus finmarchicus occur each spring in the shelf-slope-oceanic regions off the Lofoten-Vesteralen Islands where productive fisheries have traditionally supported local economies. The retention and off-shelf transport of populations of C. finmarchicus populations were studied by analyzing ocean color remote sensing, satellite altimetry data, and Lagrangian Coherent Structures (LCS) between 2010 and 2019. Our analysis revealed the existence of a transport barrier reoccurring at the shelf break that retains C. finmarchicus on the shelf for 30-70 days in the spring when C. finmarchicus were seasonally ascending to the surface layer. The analysis of baroclinic and barotropic energy conversions indicated that the topographically steered Norwegian Atlantic Current is the primary mechanism in the formation of the transport barrier, which restricts exchanges of C. finmarchicus populations between shelf and oceanic waters. In the mid- to late April, an increase in baroclinicity leads to an increase in mesoscale eddies generated on the shelf break near Lofoten-Vesteralen Islands, breaking down transport barriers and causing off-shelf transport of C. finmarchicus. The transport barrier predictably reoccurs in early spring which supports the entrapment of C. finmarchicus in the shelf region. |
format |
Report |
author |
Dong, Huizi Zhou, Meng Hu, Ziyuan Zhang, Zhaoru Zhong, Yisen Basedow, Sunnje L. Smith, Walker O., Jr. |
author_facet |
Dong, Huizi Zhou, Meng Hu, Ziyuan Zhang, Zhaoru Zhong, Yisen Basedow, Sunnje L. Smith, Walker O., Jr. |
author_sort |
Dong, Huizi |
title |
Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
title_short |
Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
title_full |
Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
title_fullStr |
Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
title_full_unstemmed |
Transport Barriers and the Retention of Calanus finmarchicus on the Lofoten Shelf in Early Spring |
title_sort |
transport barriers and the retention of calanus finmarchicus on the lofoten shelf in early spring |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2021 |
url |
http://ir.qdio.ac.cn/handle/337002/176200 http://ir.qdio.ac.cn/handle/337002/176201 https://doi.org/10.1029/2021JC017408 |
geographic |
Lofoten |
geographic_facet |
Lofoten |
genre |
Calanus finmarchicus Lofoten |
genre_facet |
Calanus finmarchicus Lofoten |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS http://ir.qdio.ac.cn/handle/337002/176200 http://ir.qdio.ac.cn/handle/337002/176201 doi:10.1029/2021JC017408 |
op_doi |
https://doi.org/10.1029/2021JC017408 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
8 |
_version_ |
1766382831369453568 |