Pathways and time scales of ocean heat uptake and high-latitude ventilation
Changes in regional ocean heat content are not only sensitive to anthropogenic and natural influences, but also substantially impacted by the redistribution of heat, which is in turn driven by changes in ocean circulation and air-sea fluxes. Using a set of numerical simulations with an ocean-sea-ice...
Main Authors: | , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
2020
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/529663/ |
id |
ftnerc:oai:nora.nerc.ac.uk:529663 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:529663 2023-05-15T18:18:32+02:00 Pathways and time scales of ocean heat uptake and high-latitude ventilation Marzocchi, Alice Nurser, A. J. George Clement, Louis McDonagh, Elaine 2020-02-19 http://nora.nerc.ac.uk/id/eprint/529663/ unknown Marzocchi, Alice orcid:0000-0002-3430-3574 Nurser, A. J. George; Clement, Louis orcid:0000-0002-6935-9455 McDonagh, Elaine. 2020 Pathways and time scales of ocean heat uptake and high-latitude ventilation. In: Ocean Sciences Meeting, San Diego, California, 16-21 February 2020. Publication - Conference Item PeerReviewed 2020 ftnerc 2023-02-04T19:51:46Z Changes in regional ocean heat content are not only sensitive to anthropogenic and natural influences, but also substantially impacted by the redistribution of heat, which is in turn driven by changes in ocean circulation and air-sea fluxes. Using a set of numerical simulations with an ocean-sea-ice model of the NEMO framework, we assess where the ocean takes up heat from the atmosphere and how ocean currents transport and redistribute that heat. Here, the strength and patterns of the net uptake of heat by the ocean are treated like a passive tracer, by including simulated sea water vintage dyes, which are released annually between 1958 and 2017. An additional tracer released in year 1800 is also used to investigate longer-term variability. All dye tracers are released from 29 surface patches, representing different water mass production sites, allowing us to identify when and where water masses were last ventilated. The tracers’ distribution and fluxes are shown to capture years of strong and weak convection at deep and mode water formation sites in both hemispheres, when compared to the available observations. Using this approach, which can be applied to any passive tracer in the ocean, we can: (1) assess the relative role of each of the water mass production sites, (2) evaluate the regional and depth distribution of the tracers, and (3) determine their variability on interannual, multidecadal and centennial time scales. Text Sea ice Natural Environment Research Council: NERC Open Research Archive |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Changes in regional ocean heat content are not only sensitive to anthropogenic and natural influences, but also substantially impacted by the redistribution of heat, which is in turn driven by changes in ocean circulation and air-sea fluxes. Using a set of numerical simulations with an ocean-sea-ice model of the NEMO framework, we assess where the ocean takes up heat from the atmosphere and how ocean currents transport and redistribute that heat. Here, the strength and patterns of the net uptake of heat by the ocean are treated like a passive tracer, by including simulated sea water vintage dyes, which are released annually between 1958 and 2017. An additional tracer released in year 1800 is also used to investigate longer-term variability. All dye tracers are released from 29 surface patches, representing different water mass production sites, allowing us to identify when and where water masses were last ventilated. The tracers’ distribution and fluxes are shown to capture years of strong and weak convection at deep and mode water formation sites in both hemispheres, when compared to the available observations. Using this approach, which can be applied to any passive tracer in the ocean, we can: (1) assess the relative role of each of the water mass production sites, (2) evaluate the regional and depth distribution of the tracers, and (3) determine their variability on interannual, multidecadal and centennial time scales. |
format |
Text |
author |
Marzocchi, Alice Nurser, A. J. George Clement, Louis McDonagh, Elaine |
spellingShingle |
Marzocchi, Alice Nurser, A. J. George Clement, Louis McDonagh, Elaine Pathways and time scales of ocean heat uptake and high-latitude ventilation |
author_facet |
Marzocchi, Alice Nurser, A. J. George Clement, Louis McDonagh, Elaine |
author_sort |
Marzocchi, Alice |
title |
Pathways and time scales of ocean heat uptake and high-latitude ventilation |
title_short |
Pathways and time scales of ocean heat uptake and high-latitude ventilation |
title_full |
Pathways and time scales of ocean heat uptake and high-latitude ventilation |
title_fullStr |
Pathways and time scales of ocean heat uptake and high-latitude ventilation |
title_full_unstemmed |
Pathways and time scales of ocean heat uptake and high-latitude ventilation |
title_sort |
pathways and time scales of ocean heat uptake and high-latitude ventilation |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/529663/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
Marzocchi, Alice orcid:0000-0002-3430-3574 Nurser, A. J. George; Clement, Louis orcid:0000-0002-6935-9455 McDonagh, Elaine. 2020 Pathways and time scales of ocean heat uptake and high-latitude ventilation. In: Ocean Sciences Meeting, San Diego, California, 16-21 February 2020. |
_version_ |
1766195143408353280 |