Pacific anthropogenic carbon between 1991 and 2017
We estimate anthropogenic carbon (Canth) accumulation rates in the Pacific Ocean between 1991 and 2017 from 14 hydrographic sections that have been occupied two to four times over the past few decades, with most sections having been recently measured as part of the Global Ocean Ship‐based Hydrograph...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2019
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/33145/ https://eprints.utas.edu.au/33145/1/137406%20-%20Pacific%20Anthropogenic%20Carbon%20Between%201991%20and%202017.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:33145 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:33145 2023-05-15T17:51:37+02:00 Pacific anthropogenic carbon between 1991 and 2017 Carter, BR Feely, RA Wanninkhof, R Kouketsu, S Sonnerup, RE Pardo, PC Sabine, CL Johnson, GC Sloyan, BM Murata, A Mecking, S Tilbrook, B Speer, K Talley, LD Millero, FJ Wijffels, SE Macdonald, AM Gruber, N Bullister, JL 2019 application/pdf https://eprints.utas.edu.au/33145/ https://eprints.utas.edu.au/33145/1/137406%20-%20Pacific%20Anthropogenic%20Carbon%20Between%201991%20and%202017.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/33145/1/137406%20-%20Pacific%20Anthropogenic%20Carbon%20Between%201991%20and%202017.pdf Carter, BR, Feely, RA, Wanninkhof, R, Kouketsu, S, Sonnerup, RE, Pardo, PC, Sabine, CL, Johnson, GC, Sloyan, BM, Murata, A, Mecking, S, Tilbrook, B, Speer, K, Talley, LD, Millero, FJ, Wijffels, SE, Macdonald, AM, Gruber, N and Bullister, JL 2019 , 'Pacific anthropogenic carbon between 1991 and 2017' , Global Biogeochemical Cycles, vol. 33, no. 5 , pp. 597-617 , doi:10.1029/2018GB006154 <http://dx.doi.org/10.1029/2018GB006154>. anthropogenic carbon Pacific decadal variability eMLR ocean acidification repeat hydrography Article PeerReviewed 2019 ftunivtasmania https://doi.org/10.1029/2018GB006154 2021-10-04T22:17:43Z We estimate anthropogenic carbon (Canth) accumulation rates in the Pacific Ocean between 1991 and 2017 from 14 hydrographic sections that have been occupied two to four times over the past few decades, with most sections having been recently measured as part of the Global Ocean Ship‐based Hydrographic Investigations Program. The rate of change of Canth is estimated using a new method that combines the extended multiple linear regression method with improvements to address the challenges of analyzing multiple occupations of sections spaced irregularly in time. The Canth accumulation rate over the top 1,500 m of the Pacific increased from 8.8 (±1.1, 1σ) Pg of carbon per decade between 1995 and 2005 to 11.7 (±1.1) PgC per decade between 2005 and 2015. For the entire Pacific, about half of this decadal increase in the accumulation rate is attributable to the increase in atmospheric CO2, while in the South Pacific subtropical gyre this fraction is closer to one fifth. This suggests a substantial enhancement of the accumulation of Canth in the South Pacific by circulation variability and implies that a meaningful portion of the reinvigoration of the global CO2 sink that occurred between ~2000 and ~2010 could be driven by enhanced ocean Canth uptake and advection into this gyre. Our assessment suggests that the accuracy of Canth accumulation rate reconstructions along survey lines is limited by the accuracy of the full suite of hydrographic data and that a continuation of repeated surveys is a critical component of future carbon cycle monitoring. Article in Journal/Newspaper Ocean acidification University of Tasmania: UTas ePrints Pacific Global Biogeochemical Cycles 33 5 597 617 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
anthropogenic carbon Pacific decadal variability eMLR ocean acidification repeat hydrography |
spellingShingle |
anthropogenic carbon Pacific decadal variability eMLR ocean acidification repeat hydrography Carter, BR Feely, RA Wanninkhof, R Kouketsu, S Sonnerup, RE Pardo, PC Sabine, CL Johnson, GC Sloyan, BM Murata, A Mecking, S Tilbrook, B Speer, K Talley, LD Millero, FJ Wijffels, SE Macdonald, AM Gruber, N Bullister, JL Pacific anthropogenic carbon between 1991 and 2017 |
topic_facet |
anthropogenic carbon Pacific decadal variability eMLR ocean acidification repeat hydrography |
description |
We estimate anthropogenic carbon (Canth) accumulation rates in the Pacific Ocean between 1991 and 2017 from 14 hydrographic sections that have been occupied two to four times over the past few decades, with most sections having been recently measured as part of the Global Ocean Ship‐based Hydrographic Investigations Program. The rate of change of Canth is estimated using a new method that combines the extended multiple linear regression method with improvements to address the challenges of analyzing multiple occupations of sections spaced irregularly in time. The Canth accumulation rate over the top 1,500 m of the Pacific increased from 8.8 (±1.1, 1σ) Pg of carbon per decade between 1995 and 2005 to 11.7 (±1.1) PgC per decade between 2005 and 2015. For the entire Pacific, about half of this decadal increase in the accumulation rate is attributable to the increase in atmospheric CO2, while in the South Pacific subtropical gyre this fraction is closer to one fifth. This suggests a substantial enhancement of the accumulation of Canth in the South Pacific by circulation variability and implies that a meaningful portion of the reinvigoration of the global CO2 sink that occurred between ~2000 and ~2010 could be driven by enhanced ocean Canth uptake and advection into this gyre. Our assessment suggests that the accuracy of Canth accumulation rate reconstructions along survey lines is limited by the accuracy of the full suite of hydrographic data and that a continuation of repeated surveys is a critical component of future carbon cycle monitoring. |
format |
Article in Journal/Newspaper |
author |
Carter, BR Feely, RA Wanninkhof, R Kouketsu, S Sonnerup, RE Pardo, PC Sabine, CL Johnson, GC Sloyan, BM Murata, A Mecking, S Tilbrook, B Speer, K Talley, LD Millero, FJ Wijffels, SE Macdonald, AM Gruber, N Bullister, JL |
author_facet |
Carter, BR Feely, RA Wanninkhof, R Kouketsu, S Sonnerup, RE Pardo, PC Sabine, CL Johnson, GC Sloyan, BM Murata, A Mecking, S Tilbrook, B Speer, K Talley, LD Millero, FJ Wijffels, SE Macdonald, AM Gruber, N Bullister, JL |
author_sort |
Carter, BR |
title |
Pacific anthropogenic carbon between 1991 and 2017 |
title_short |
Pacific anthropogenic carbon between 1991 and 2017 |
title_full |
Pacific anthropogenic carbon between 1991 and 2017 |
title_fullStr |
Pacific anthropogenic carbon between 1991 and 2017 |
title_full_unstemmed |
Pacific anthropogenic carbon between 1991 and 2017 |
title_sort |
pacific anthropogenic carbon between 1991 and 2017 |
publisher |
Amer Geophysical Union |
publishDate |
2019 |
url |
https://eprints.utas.edu.au/33145/ https://eprints.utas.edu.au/33145/1/137406%20-%20Pacific%20Anthropogenic%20Carbon%20Between%201991%20and%202017.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://eprints.utas.edu.au/33145/1/137406%20-%20Pacific%20Anthropogenic%20Carbon%20Between%201991%20and%202017.pdf Carter, BR, Feely, RA, Wanninkhof, R, Kouketsu, S, Sonnerup, RE, Pardo, PC, Sabine, CL, Johnson, GC, Sloyan, BM, Murata, A, Mecking, S, Tilbrook, B, Speer, K, Talley, LD, Millero, FJ, Wijffels, SE, Macdonald, AM, Gruber, N and Bullister, JL 2019 , 'Pacific anthropogenic carbon between 1991 and 2017' , Global Biogeochemical Cycles, vol. 33, no. 5 , pp. 597-617 , doi:10.1029/2018GB006154 <http://dx.doi.org/10.1029/2018GB006154>. |
op_doi |
https://doi.org/10.1029/2018GB006154 |
container_title |
Global Biogeochemical Cycles |
container_volume |
33 |
container_issue |
5 |
container_start_page |
597 |
op_container_end_page |
617 |
_version_ |
1766158832802725888 |