Deep and abyssal ocean warming from 35 years of repeat hydrography
Deep and abyssal ocean warming from 35 years of repeat hydrography
Global and regional ocean warming deeper than 2000 m is investigated using 35 years of sustained repeat hydrographic survey data starting in 1981. The global long-term temperature trend below 2000 m, representing the time period 1991–2010, is equivalent to a mean heat flux of 0.065 ± 0.040 W m?2 applied over the Earth's surface area. The strongest warming rates are found in the abyssal layer (4000–6000 m), which contributes to one third of the total heat uptake with the largest contribution from the Southern and Pacific Oceans. A similar regional pattern is found in the deep layer (2000–4000 m), which explains the remaining two thirds of the total heat uptake yet with larger uncertainties. The global average warming rate did not change within uncertainties pre-2000 versus post-2000, whereas ocean average warming rates decreased in the Pacific and Indian Oceans and increased in the Atlantic and Southern Oceans.
repeat hydrography, ocean heat content, GO-SHIP
10,356-10,365
Desbruyeres, Damien G.
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Purkey, Sarah G.
fe793098-d0b7-4194-bf39-99eb4445a875
Mcdonagh, Elaine L.
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Johnson, Gregory C.
666537af-5a06-41a3-8242-ffce0e7da809
King, Brian A.
960f44b4-cc9c-4f77-b3c8-775530ac0061
16 October 2016
Desbruyeres, Damien G.
3184ffa3-0366-4324-ab86-be7e456430ee
Purkey, Sarah G.
fe793098-d0b7-4194-bf39-99eb4445a875
Mcdonagh, Elaine L.
47e26eeb-b774-4068-af07-31847e42b977
Johnson, Gregory C.
666537af-5a06-41a3-8242-ffce0e7da809
King, Brian A.
960f44b4-cc9c-4f77-b3c8-775530ac0061
Desbruyeres, Damien G., Purkey, Sarah G., Mcdonagh, Elaine L., Johnson, Gregory C. and King, Brian A.
(2016)
Deep and abyssal ocean warming from 35 years of repeat hydrography.
Geophysical Research Letters, 43 (19), .
(doi:10.1002/2016GL070413).
Abstract
Global and regional ocean warming deeper than 2000 m is investigated using 35 years of sustained repeat hydrographic survey data starting in 1981. The global long-term temperature trend below 2000 m, representing the time period 1991–2010, is equivalent to a mean heat flux of 0.065 ± 0.040 W m?2 applied over the Earth's surface area. The strongest warming rates are found in the abyssal layer (4000–6000 m), which contributes to one third of the total heat uptake with the largest contribution from the Southern and Pacific Oceans. A similar regional pattern is found in the deep layer (2000–4000 m), which explains the remaining two thirds of the total heat uptake yet with larger uncertainties. The global average warming rate did not change within uncertainties pre-2000 versus post-2000, whereas ocean average warming rates decreased in the Pacific and Indian Oceans and increased in the Atlantic and Southern Oceans.
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Accepted/In Press date: 14 September 2016
e-pub ahead of print date: 9 October 2016
Published date: 16 October 2016
Keywords:
repeat hydrography, ocean heat content, GO-SHIP
Organisations:
Marine Physics and Ocean Climate
Identifiers
Local EPrints ID: 403849
URI: http://eprints.soton.ac.uk/id/eprint/403849
ISSN: 0094-8276
PURE UUID: f4b7947c-d1af-499d-9200-891df8a8f442
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Date deposited: 13 Dec 2016 15:44
Last modified: 15 Mar 2024 06:08
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Contributors
Author:
Damien G. Desbruyeres
Author:
Sarah G. Purkey
Author:
Elaine L. Mcdonagh
Author:
Gregory C. Johnson
Author:
Brian A. King
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