The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales
We systematically quantify the pathways and time scales that set the efficiency, Ebio, of the global biological pump by applying Green-function-based diagnostics to a data-assimilated phosphorus cycle embedded in a jointly assimilated ocean circulation. We consider “bio pipes” that consist of phosph...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union (AGU)
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/1959.4/unsworks_40925 https://unsworks.unsw.edu.au/bitstreams/d373946b-8c3a-42ac-bd27-ddcfda7c0977/download https://doi.org/10.1002/2016JC011821 |
id |
ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_40925 |
---|---|
record_format |
openpolar |
spelling |
ftunswworks:oai:unsworks.library.unsw.edu.au:1959.4/unsworks_40925 2024-05-19T07:29:06+00:00 The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales Pasquier, B Holzer, M 2016-08-01 application/pdf http://hdl.handle.net/1959.4/unsworks_40925 https://unsworks.unsw.edu.au/bitstreams/d373946b-8c3a-42ac-bd27-ddcfda7c0977/download https://doi.org/10.1002/2016JC011821 unknown American Geophysical Union (AGU) http://purl.org/au-research/grants/arc/DP120100674 http://hdl.handle.net/1959.4/unsworks_40925 https://unsworks.unsw.edu.au/bitstreams/d373946b-8c3a-42ac-bd27-ddcfda7c0977/download https://doi.org/10.1002/2016JC011821 open access https://purl.org/coar/access_right/c_abf2 CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read urn:ISSN:2169-9275 urn:ISSN:2169-9291 Journal of Geophysical Research: Oceans, 121, 8, 6367-6388 15 Life on Land anzsrc-for: 0404 Geophysics anzsrc-for: 0405 Oceanography anzsrc-for: 0406 Physical Geography and Environmental Geoscience journal article http://purl.org/coar/resource_type/c_6501 2016 ftunswworks https://doi.org/10.1002/2016JC011821 2024-05-01T00:11:20Z We systematically quantify the pathways and time scales that set the efficiency, Ebio, of the global biological pump by applying Green-function-based diagnostics to a data-assimilated phosphorus cycle embedded in a jointly assimilated ocean circulation. We consider “bio pipes” that consist of phosphorus paths that connect specified regions of last biological utilization with regions where regenerated phosphate first reemerges into the euphotic zone. The bio pipes that contribute most to Ebio connect the Eastern Equatorial Pacific (EEqP) and Equatorial Atlantic to the Southern Ocean ((21 ± 3)% of Ebio), as well as the Southern Ocean to itself ((15 ± 3)% of Ebio). The bio pipes with the largest phosphorus flow rates connect the EEqP to itself and the subantarctic Southern Ocean to itself. The global mean sequestration time of the biological pump is 130 ± 70 years, while the sequestration time of the bio pipe from anywhere to the Antarctic region of the Southern Ocean is 430 ± 30 years. The distribution of phosphorus flowing within a given bio pipe is quantified by its transit-time partitioned path density. For the largest bio pipes, ∼1/7 of their phosphorus is carried by thermocline paths with transit times less than ∼300–400 years, while ∼4/7 of their phosphorus is carried by abyssal paths with transit times exceeding ∼700 years. The path density reveals that Antarctic Intermediate Water carries about a third of the regenerated phosphate last utilized in the EEqP that is destined for the Southern Ocean euphotic zone. The Southern Ocean is where (62 ± 2)% of the regenerated inventory and (69 ± 1)% of the preformed inventory first reemerge into the euphotic zone. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean UNSW Sydney (The University of New South Wales): UNSWorks Journal of Geophysical Research: Oceans 121 8 6367 6388 |
institution |
Open Polar |
collection |
UNSW Sydney (The University of New South Wales): UNSWorks |
op_collection_id |
ftunswworks |
language |
unknown |
topic |
15 Life on Land anzsrc-for: 0404 Geophysics anzsrc-for: 0405 Oceanography anzsrc-for: 0406 Physical Geography and Environmental Geoscience |
spellingShingle |
15 Life on Land anzsrc-for: 0404 Geophysics anzsrc-for: 0405 Oceanography anzsrc-for: 0406 Physical Geography and Environmental Geoscience Pasquier, B Holzer, M The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
topic_facet |
15 Life on Land anzsrc-for: 0404 Geophysics anzsrc-for: 0405 Oceanography anzsrc-for: 0406 Physical Geography and Environmental Geoscience |
description |
We systematically quantify the pathways and time scales that set the efficiency, Ebio, of the global biological pump by applying Green-function-based diagnostics to a data-assimilated phosphorus cycle embedded in a jointly assimilated ocean circulation. We consider “bio pipes” that consist of phosphorus paths that connect specified regions of last biological utilization with regions where regenerated phosphate first reemerges into the euphotic zone. The bio pipes that contribute most to Ebio connect the Eastern Equatorial Pacific (EEqP) and Equatorial Atlantic to the Southern Ocean ((21 ± 3)% of Ebio), as well as the Southern Ocean to itself ((15 ± 3)% of Ebio). The bio pipes with the largest phosphorus flow rates connect the EEqP to itself and the subantarctic Southern Ocean to itself. The global mean sequestration time of the biological pump is 130 ± 70 years, while the sequestration time of the bio pipe from anywhere to the Antarctic region of the Southern Ocean is 430 ± 30 years. The distribution of phosphorus flowing within a given bio pipe is quantified by its transit-time partitioned path density. For the largest bio pipes, ∼1/7 of their phosphorus is carried by thermocline paths with transit times less than ∼300–400 years, while ∼4/7 of their phosphorus is carried by abyssal paths with transit times exceeding ∼700 years. The path density reveals that Antarctic Intermediate Water carries about a third of the regenerated phosphate last utilized in the EEqP that is destined for the Southern Ocean euphotic zone. The Southern Ocean is where (62 ± 2)% of the regenerated inventory and (69 ± 1)% of the preformed inventory first reemerge into the euphotic zone. |
format |
Article in Journal/Newspaper |
author |
Pasquier, B Holzer, M |
author_facet |
Pasquier, B Holzer, M |
author_sort |
Pasquier, B |
title |
The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
title_short |
The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
title_full |
The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
title_fullStr |
The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
title_full_unstemmed |
The plumbing of the global biological pump: Efficiency control through leaks, pathways, and time scales |
title_sort |
plumbing of the global biological pump: efficiency control through leaks, pathways, and time scales |
publisher |
American Geophysical Union (AGU) |
publishDate |
2016 |
url |
http://hdl.handle.net/1959.4/unsworks_40925 https://unsworks.unsw.edu.au/bitstreams/d373946b-8c3a-42ac-bd27-ddcfda7c0977/download https://doi.org/10.1002/2016JC011821 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
urn:ISSN:2169-9275 urn:ISSN:2169-9291 Journal of Geophysical Research: Oceans, 121, 8, 6367-6388 |
op_relation |
http://purl.org/au-research/grants/arc/DP120100674 http://hdl.handle.net/1959.4/unsworks_40925 https://unsworks.unsw.edu.au/bitstreams/d373946b-8c3a-42ac-bd27-ddcfda7c0977/download https://doi.org/10.1002/2016JC011821 |
op_rights |
open access https://purl.org/coar/access_right/c_abf2 CC-BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/ free_to_read |
op_doi |
https://doi.org/10.1002/2016JC011821 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
8 |
container_start_page |
6367 |
op_container_end_page |
6388 |
_version_ |
1799477479272873984 |