Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5)
Meteorological data providers release updated forecasts several times per day – at the forecast epochs. The first time step ( t =0 ) of each forecast, the so-called analysis step, is updated by a data-assimilation process so that the meteorological fields at this time in general do not match the fie...
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2019
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ftdoajarticles:oai:doaj.org/article:d6a2323a86df448e8018a4ba94f6783c 2023-05-15T17:32:51+02:00 Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) B. Büchmann 2019-09-01T00:00:00Z https://doi.org/10.5194/gmd-12-3915-2019 https://doaj.org/article/d6a2323a86df448e8018a4ba94f6783c EN eng Copernicus Publications https://www.geosci-model-dev.net/12/3915/2019/gmd-12-3915-2019.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-12-3915-2019 1991-959X 1991-9603 https://doaj.org/article/d6a2323a86df448e8018a4ba94f6783c Geoscientific Model Development, Vol 12, Pp 3915-3922 (2019) Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/gmd-12-3915-2019 2022-12-31T01:12:11Z Meteorological data providers release updated forecasts several times per day – at the forecast epochs. The first time step ( t =0 ) of each forecast, the so-called analysis step, is updated by a data-assimilation process so that the meteorological fields at this time in general do not match the fields from the previous forecast. Seen from the perspective of oceanographic modelling, the analysis step represents a possible discontinuity in the model forcing. Unless care is taken, this “meteorological discontinuity” may generate spurious waves in the ocean model. The problem is examined and quantified for a single meteorological model: the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS). A simple straightforward solution is suggested to overcome the forcing discontinuity and the effect on two particular ocean models is examined: the FCOO NA3 (North Atlantic 3 nm) storm-surge model and the NS1C (North Sea–Baltic Sea 1 nm) circulation model. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Geoscientific Model Development 12 9 3915 3922 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 B. Büchmann Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
topic_facet |
Geology QE1-996.5 |
description |
Meteorological data providers release updated forecasts several times per day – at the forecast epochs. The first time step ( t =0 ) of each forecast, the so-called analysis step, is updated by a data-assimilation process so that the meteorological fields at this time in general do not match the fields from the previous forecast. Seen from the perspective of oceanographic modelling, the analysis step represents a possible discontinuity in the model forcing. Unless care is taken, this “meteorological discontinuity” may generate spurious waves in the ocean model. The problem is examined and quantified for a single meteorological model: the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS). A simple straightforward solution is suggested to overcome the forcing discontinuity and the effect on two particular ocean models is examined: the FCOO NA3 (North Atlantic 3 nm) storm-surge model and the NS1C (North Sea–Baltic Sea 1 nm) circulation model. |
format |
Article in Journal/Newspaper |
author |
B. Büchmann |
author_facet |
B. Büchmann |
author_sort |
B. Büchmann |
title |
Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
title_short |
Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
title_full |
Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
title_fullStr |
Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
title_full_unstemmed |
Dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ECMWF-IFS and GETM (v2.5) |
title_sort |
dealing with discontinuous meteorological forcing in operational ocean modelling: a case study using ecmwf-ifs and getm (v2.5) |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/gmd-12-3915-2019 https://doaj.org/article/d6a2323a86df448e8018a4ba94f6783c |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geoscientific Model Development, Vol 12, Pp 3915-3922 (2019) |
op_relation |
https://www.geosci-model-dev.net/12/3915/2019/gmd-12-3915-2019.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-12-3915-2019 1991-959X 1991-9603 https://doaj.org/article/d6a2323a86df448e8018a4ba94f6783c |
op_doi |
https://doi.org/10.5194/gmd-12-3915-2019 |
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Geoscientific Model Development |
container_volume |
12 |
container_issue |
9 |
container_start_page |
3915 |
op_container_end_page |
3922 |
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1766131151799320576 |