dc.contributor.author |
Russo, C
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|
dc.contributor.author |
Veitch, J
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|
dc.contributor.author |
Carr, M
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|
dc.contributor.author |
Fearon, G
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|
dc.contributor.author |
Whittle, Christo P
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|
dc.date.accessioned |
2023-03-20T08:36:49Z |
|
dc.date.available |
2023-03-20T08:36:49Z |
|
dc.date.issued |
2022-03 |
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dc.identifier.citation |
Russo, C., Veitch, J., Carr, M., Fearon, G. & Whittle, C.P. 2022. An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features. <i>Frontiers in Marine Science, 9.</i> http://hdl.handle.net/10204/12687 |
en_ZA |
dc.identifier.issn |
2296-7745 |
|
dc.identifier.uri |
https://doi.org/10.3389/fmars.2022.837906
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|
dc.identifier.uri |
http://hdl.handle.net/10204/12687
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|
dc.description.abstract |
A regional assessment of three global ocean reanalysis products is presented for southern Africa’s major oceanographic features. The reanalyses include Mercator Ocean’s Global Reanalysis (GLORYS), the Commonwealth Scientific and Industrial Research Organisation’s (CSIRO) Bluelink Reanalysis (BRAN) and the Fleet Numerical Meteorology and Oceanography Center’s (FNMOC) global Hybrid Coordinate Ocean Model (HYCOM) reanalysis. The aim is to provide modelers with sufficient information for selecting the appropriate product for use as boundary conditions to force their regional ocean models, as well as to provide marine industries, relevant government agencies and academics with insight into the optimal reanalysis product for their purposes. The reanalyses are compared to both assimilated and independent observational datasets spanning various regions within the southern African marine environment. While all reanalysis products reproduce the eastern and western boundary current systems surrounding southern Africa, limitations exist. BRAN outperforms the other reanalyses in its representation of the Mixed Layer Depth, contributing to its good representation of coastal SSTs in the Benguela upwelling system, whereas GLORYS and HYCOM’s misrepresented MLD result in significant warm biases in this region. The Angola-Benguela Frontal Zone and it’s variability is best reproduced by BRAN and HYCOM. The Agulhas Current system’s major components are well reproduced by both GLORYS and BRAN. HYCOM, however, simulates considerably more early retroflections than are observed which have resulted in its mean eastward location. While all the reanalyses overestimate the occurrence of Agulhas meanders, GLORYS and BRAN resolve the associated variability best. Agulhas Current transport is best resolved by GLORYS, unlike BRAN and HYCOM which largely overestimate the magnitude of its south-westward flow, linked to their misrepresentation of the Current’s vertical structure. The bay-scale and nearshore evaluations highlighted issues pertaining to the resolution of the reanalyses and their use at such a small scale. The reanalyses are limited by their resolution, as well as by their misrepresentation of submesoscale processes or lack thereof, prompting the need for the development of regional downscaled models in and around the southern African oceans based on the global ocean reanalysis products. |
en_US |
dc.format |
Fulltext |
en_US |
dc.language.iso |
en |
en_US |
dc.relation.uri |
https://www.frontiersin.org/articles/10.3389/fmars.2022.837906/full |
en_US |
dc.source |
Frontiers in Marine Science, 9 |
en_US |
dc.subject |
Ocean reanalysis |
en_US |
dc.subject |
Model evaluation |
en_US |
dc.subject |
Agulhas Current system |
en_US |
dc.subject |
Benguela upwelling system |
en_US |
dc.subject |
Ocean observations |
en_US |
dc.subject |
Regional processes |
en_US |
dc.title |
An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features |
en_US |
dc.type |
Article |
en_US |
dc.description.pages |
27 |
en_US |
dc.description.note |
Copyright © 2022 Russo, Veitch, Carr, Fearon and Whittle. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
en_US |
dc.description.cluster |
Smart Places |
en_US |
dc.description.impactarea |
Coastal Systems |
en_US |
dc.identifier.apacitation |
Russo, C., Veitch, J., Carr, M., Fearon, G., & Whittle, C. P. (2022). An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features. <i>Frontiers in Marine Science, 9</i>, http://hdl.handle.net/10204/12687 |
en_ZA |
dc.identifier.chicagocitation |
Russo, C, J Veitch, M Carr, G Fearon, and Christo P Whittle "An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features." <i>Frontiers in Marine Science, 9</i> (2022) http://hdl.handle.net/10204/12687 |
en_ZA |
dc.identifier.vancouvercitation |
Russo C, Veitch J, Carr M, Fearon G, Whittle CP. An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features. Frontiers in Marine Science, 9. 2022; http://hdl.handle.net/10204/12687. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Russo, C
AU - Veitch, J
AU - Carr, M
AU - Fearon, G
AU - Whittle, Christo P
AB - A regional assessment of three global ocean reanalysis products is presented for southern Africa’s major oceanographic features. The reanalyses include Mercator Ocean’s Global Reanalysis (GLORYS), the Commonwealth Scientific and Industrial Research Organisation’s (CSIRO) Bluelink Reanalysis (BRAN) and the Fleet Numerical Meteorology and Oceanography Center’s (FNMOC) global Hybrid Coordinate Ocean Model (HYCOM) reanalysis. The aim is to provide modelers with sufficient information for selecting the appropriate product for use as boundary conditions to force their regional ocean models, as well as to provide marine industries, relevant government agencies and academics with insight into the optimal reanalysis product for their purposes. The reanalyses are compared to both assimilated and independent observational datasets spanning various regions within the southern African marine environment. While all reanalysis products reproduce the eastern and western boundary current systems surrounding southern Africa, limitations exist. BRAN outperforms the other reanalyses in its representation of the Mixed Layer Depth, contributing to its good representation of coastal SSTs in the Benguela upwelling system, whereas GLORYS and HYCOM’s misrepresented MLD result in significant warm biases in this region. The Angola-Benguela Frontal Zone and it’s variability is best reproduced by BRAN and HYCOM. The Agulhas Current system’s major components are well reproduced by both GLORYS and BRAN. HYCOM, however, simulates considerably more early retroflections than are observed which have resulted in its mean eastward location. While all the reanalyses overestimate the occurrence of Agulhas meanders, GLORYS and BRAN resolve the associated variability best. Agulhas Current transport is best resolved by GLORYS, unlike BRAN and HYCOM which largely overestimate the magnitude of its south-westward flow, linked to their misrepresentation of the Current’s vertical structure. The bay-scale and nearshore evaluations highlighted issues pertaining to the resolution of the reanalyses and their use at such a small scale. The reanalyses are limited by their resolution, as well as by their misrepresentation of submesoscale processes or lack thereof, prompting the need for the development of regional downscaled models in and around the southern African oceans based on the global ocean reanalysis products.
DA - 2022-03
DB - ResearchSpace
DP - CSIR
J1 - Frontiers in Marine Science, 9
KW - Ocean reanalysis
KW - Model evaluation
KW - Agulhas Current system
KW - Benguela upwelling system
KW - Ocean observations
KW - Regional processes
LK - https://researchspace.csir.co.za
PY - 2022
SM - 2296-7745
T1 - An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features
TI - An intercomparison of global reanalysis products for Southern Africa’s major oceanographic features
UR - http://hdl.handle.net/10204/12687
ER -
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en_ZA |
dc.identifier.worklist |
26209 |
en_US |