Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn
<p>The ocean mixed layer depth is an important parameter describing the exchange of fluxes between the atmosphere and ocean. In ocean modelling a key factor in the accurate representation of the mixed layer is the parameterization of vertical mixing. An ideal opportunity to investigate the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-09-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://www.geosci-model-dev.net/11/3795/2018/gmd-11-3795-2018.pdf |
| _version_ | 1811298833985961984 |
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| author | D. Boettger R. Robertson G. B. Brassington |
| author_facet | D. Boettger R. Robertson G. B. Brassington |
| author_sort | D. Boettger |
| collection | DOAJ |
| description | <p>The ocean mixed layer depth is an important parameter
describing the exchange of fluxes between the atmosphere and ocean. In ocean
modelling a key factor in the accurate representation of the mixed layer is
the parameterization of vertical mixing. An ideal opportunity to investigate
the impact of different mixing schemes was provided when the Australian
Bureau of Meteorology upgraded its operational ocean forecasting model,
OceanMAPS to version 3.0. In terms of the mixed layer, the main difference
between the old and new model versions was a change of vertical mixing
scheme from that of Chen et al. (1994) to the General Ocean Turbulence Model.</p><p>The model estimates of the mixed layer depth were compared with those
derived from Argo observations. Both versions of the model exhibited a deep
bias in tropical latitudes and a shallow bias in the Southern Ocean,
consistent with previous studies. The bias, however, was greatly reduced in
version 3.0, and variance between model runs decreased. Additionally, model
skill against climatology also improved significantly. Further analysis
discounted changes to model resolution outside of the Australian region
having a significant impact on these results, leaving the change in vertical
mixing scheme as the main factor in the assessed improvements to mixed layer
depth representation.</p> |
| first_indexed | 2024-04-13T06:26:08Z |
| format | Article |
| id | doaj.art-1a0da8bfadbf4a9f8ca6df12d776d57c |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-04-13T06:26:08Z |
| publishDate | 2018-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Geoscientific Model Development |
| spelling | doaj.art-1a0da8bfadbf4a9f8ca6df12d776d57c2022-12-22T02:58:23ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032018-09-01113795380510.5194/gmd-11-3795-2018Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumnD. Boettger0R. Robertson1G. B. Brassington2School of Mathematics and Statistics, University of New South Wales, Sydney, 2052, AustraliaXiamen University Malaysia, Selangor Darul Ehsan, 43900 Sepang, MalaysiaBureau of Meteorology, Sydney, 2000, Australia<p>The ocean mixed layer depth is an important parameter describing the exchange of fluxes between the atmosphere and ocean. In ocean modelling a key factor in the accurate representation of the mixed layer is the parameterization of vertical mixing. An ideal opportunity to investigate the impact of different mixing schemes was provided when the Australian Bureau of Meteorology upgraded its operational ocean forecasting model, OceanMAPS to version 3.0. In terms of the mixed layer, the main difference between the old and new model versions was a change of vertical mixing scheme from that of Chen et al. (1994) to the General Ocean Turbulence Model.</p><p>The model estimates of the mixed layer depth were compared with those derived from Argo observations. Both versions of the model exhibited a deep bias in tropical latitudes and a shallow bias in the Southern Ocean, consistent with previous studies. The bias, however, was greatly reduced in version 3.0, and variance between model runs decreased. Additionally, model skill against climatology also improved significantly. Further analysis discounted changes to model resolution outside of the Australian region having a significant impact on these results, leaving the change in vertical mixing scheme as the main factor in the assessed improvements to mixed layer depth representation.</p>https://www.geosci-model-dev.net/11/3795/2018/gmd-11-3795-2018.pdf |
| spellingShingle | D. Boettger R. Robertson G. B. Brassington Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn Geoscientific Model Development |
| title | Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn |
| title_full | Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn |
| title_fullStr | Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn |
| title_full_unstemmed | Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn |
| title_short | Verification of the mixed layer depth in the OceanMAPS operational forecast model for Austral autumn |
| title_sort | verification of the mixed layer depth in the oceanmaps operational forecast model for austral autumn |
| url | https://www.geosci-model-dev.net/11/3795/2018/gmd-11-3795-2018.pdf |
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