The distribution of Fe in the Antarctic Circumpolar Current
The large-scale distributions of dissolved and total Fe in surface and deep waters of the Antarctic Circumpolar Current exhibit strong relationships with hydrography and biological processes. The mean dissolved Fe concentrations are low in surface waters of the Antarctic Circumpolar Current (0.31–0....
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1997
|
Subjects: | |
Online Access: | https://hdl.handle.net/11370/9d6688b5-552d-4818-a3ef-a48541c69616 https://research.rug.nl/en/publications/9d6688b5-552d-4818-a3ef-a48541c69616 https://doi.org/10.1016/S0967-0645(96)00101-4 https://pure.rug.nl/ws/files/10283897/1997DeepSeaRes2Loscher.pdf |
id |
ftunigroningenpu:oai:pure.rug.nl:publications/9d6688b5-552d-4818-a3ef-a48541c69616 |
---|---|
record_format |
openpolar |
spelling |
ftunigroningenpu:oai:pure.rug.nl:publications/9d6688b5-552d-4818-a3ef-a48541c69616 2024-06-23T07:47:30+00:00 The distribution of Fe in the Antarctic Circumpolar Current Löscher, B.M. Baar, H.J.W. de Jong, J.T.M. de Veth, C. Dehairs, F. 1997 application/pdf https://hdl.handle.net/11370/9d6688b5-552d-4818-a3ef-a48541c69616 https://research.rug.nl/en/publications/9d6688b5-552d-4818-a3ef-a48541c69616 https://doi.org/10.1016/S0967-0645(96)00101-4 https://pure.rug.nl/ws/files/10283897/1997DeepSeaRes2Loscher.pdf eng eng https://research.rug.nl/en/publications/9d6688b5-552d-4818-a3ef-a48541c69616 info:eu-repo/semantics/openAccess Löscher , B M , Baar , H J W D , Jong , J T M D , Veth , C & Dehairs , F 1997 , ' The distribution of Fe in the Antarctic Circumpolar Current ' , Deep Sea Research Part II: Topical Studies in Oceanography , vol. 44 , no. 1 , pp. 143-187 . https://doi.org/10.1016/S0967-0645(96)00101-4 article 1997 ftunigroningenpu https://doi.org/10.1016/S0967-0645(96)00101-4 2024-05-27T15:48:19Z The large-scale distributions of dissolved and total Fe in surface and deep waters of the Antarctic Circumpolar Current exhibit strong relationships with hydrography and biological processes. The mean dissolved Fe concentrations are low in surface waters of the Antarctic Circumpolar Current (0.31–0.49 nM, with a minimum of 0.17 nM) and higher (averaging 1.1–1.9 nM) in the Polar Frontal region. Enhanced dissolved surface water concentrations in the Polar Frontal region are attributed to input from the continental shelf and coincide with phytoplankton spring blooms of large diatoms. The effects of sea-ice melting and iceberg melting on the Fe concentrations were relatively small. Dissolved deep-water concentrations (>400 m) in the Antarctic Circumpolar Current ranged from 0.4 to 2.8 nM. Circumpolar Deep Water has relatively high dissolved Fe concentrations in the Polar Frontal region (0.4–2.8 nM) compared with deep waters further to the south (0.6–1.1 nM). Similarly, total dissolvable (unfiltered) Fe concentrations in the Upper Circumpolar Deep Water tend to decrease southward from the Polar Frontal region. In the Lower Circumpolar Deep Water total dissolvable Fe concentrations are higher than in the Upper Circumpolar Deep Water due to the existing nepheloid layer and sources on the Mid-Atlantic Ridge. Dissolved and total dissolvable Fe concentrations in the Antarctic Bottom Water are higher than those of other water masses in the Antarctic Circumpolar Current, consistent with the nepheloid layer as well as diagenetic input from shelf sediments. The High-Nutrient/Low-Chlorophyll areas of the Antarctic Ocean and northeast Pacific Ocean have different major Fe input sources of similar magnitude. In the Antarctic Circumpolar Current upward transport of Fe is the main input source, whereas in the North Pacific Ocean, aerosols are the dominant source. Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Iceberg* Sea ice University of Groningen research database Antarctic The Antarctic Pacific Antarctic Ocean Mid-Atlantic Ridge Deep Sea Research Part II: Topical Studies in Oceanography 44 1-2 143 187 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
description |
The large-scale distributions of dissolved and total Fe in surface and deep waters of the Antarctic Circumpolar Current exhibit strong relationships with hydrography and biological processes. The mean dissolved Fe concentrations are low in surface waters of the Antarctic Circumpolar Current (0.31–0.49 nM, with a minimum of 0.17 nM) and higher (averaging 1.1–1.9 nM) in the Polar Frontal region. Enhanced dissolved surface water concentrations in the Polar Frontal region are attributed to input from the continental shelf and coincide with phytoplankton spring blooms of large diatoms. The effects of sea-ice melting and iceberg melting on the Fe concentrations were relatively small. Dissolved deep-water concentrations (>400 m) in the Antarctic Circumpolar Current ranged from 0.4 to 2.8 nM. Circumpolar Deep Water has relatively high dissolved Fe concentrations in the Polar Frontal region (0.4–2.8 nM) compared with deep waters further to the south (0.6–1.1 nM). Similarly, total dissolvable (unfiltered) Fe concentrations in the Upper Circumpolar Deep Water tend to decrease southward from the Polar Frontal region. In the Lower Circumpolar Deep Water total dissolvable Fe concentrations are higher than in the Upper Circumpolar Deep Water due to the existing nepheloid layer and sources on the Mid-Atlantic Ridge. Dissolved and total dissolvable Fe concentrations in the Antarctic Bottom Water are higher than those of other water masses in the Antarctic Circumpolar Current, consistent with the nepheloid layer as well as diagenetic input from shelf sediments. The High-Nutrient/Low-Chlorophyll areas of the Antarctic Ocean and northeast Pacific Ocean have different major Fe input sources of similar magnitude. In the Antarctic Circumpolar Current upward transport of Fe is the main input source, whereas in the North Pacific Ocean, aerosols are the dominant source. |
format |
Article in Journal/Newspaper |
author |
Löscher, B.M. Baar, H.J.W. de Jong, J.T.M. de Veth, C. Dehairs, F. |
spellingShingle |
Löscher, B.M. Baar, H.J.W. de Jong, J.T.M. de Veth, C. Dehairs, F. The distribution of Fe in the Antarctic Circumpolar Current |
author_facet |
Löscher, B.M. Baar, H.J.W. de Jong, J.T.M. de Veth, C. Dehairs, F. |
author_sort |
Löscher, B.M. |
title |
The distribution of Fe in the Antarctic Circumpolar Current |
title_short |
The distribution of Fe in the Antarctic Circumpolar Current |
title_full |
The distribution of Fe in the Antarctic Circumpolar Current |
title_fullStr |
The distribution of Fe in the Antarctic Circumpolar Current |
title_full_unstemmed |
The distribution of Fe in the Antarctic Circumpolar Current |
title_sort |
distribution of fe in the antarctic circumpolar current |
publishDate |
1997 |
url |
https://hdl.handle.net/11370/9d6688b5-552d-4818-a3ef-a48541c69616 https://research.rug.nl/en/publications/9d6688b5-552d-4818-a3ef-a48541c69616 https://doi.org/10.1016/S0967-0645(96)00101-4 https://pure.rug.nl/ws/files/10283897/1997DeepSeaRes2Loscher.pdf |
geographic |
Antarctic The Antarctic Pacific Antarctic Ocean Mid-Atlantic Ridge |
geographic_facet |
Antarctic The Antarctic Pacific Antarctic Ocean Mid-Atlantic Ridge |
genre |
Antarc* Antarctic Antarctic Ocean Iceberg* Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Ocean Iceberg* Sea ice |
op_source |
Löscher , B M , Baar , H J W D , Jong , J T M D , Veth , C & Dehairs , F 1997 , ' The distribution of Fe in the Antarctic Circumpolar Current ' , Deep Sea Research Part II: Topical Studies in Oceanography , vol. 44 , no. 1 , pp. 143-187 . https://doi.org/10.1016/S0967-0645(96)00101-4 |
op_relation |
https://research.rug.nl/en/publications/9d6688b5-552d-4818-a3ef-a48541c69616 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/S0967-0645(96)00101-4 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
44 |
container_issue |
1-2 |
container_start_page |
143 |
op_container_end_page |
187 |
_version_ |
1802651619440984064 |