Surface fluxes in the North Atlantic current during CATCH/FASTEX
CATCH (Couplage avec 1' Atmosphere en Conditions Hivernales) was the oceanic component of FASTEX (Fronts and Atlantic Storm-Track EXperiment). It took place in January and February 1997, in the Newfoundland Basin near 47 degrees N, 40 degrees W, a region characterized by the presence of the war...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Online Access: | https://hal.science/hal-03284898 https://doi.org/10.1256/smsqj.56119 |
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ftunivnantes:oai:HAL:hal-03284898v1 2023-05-15T17:22:53+02:00 Surface fluxes in the North Atlantic current during CATCH/FASTEX Eymard, L Caniaux, G Dupuis, H Prieur, L Giordani, H Troadec, R Bessemoulin, P Lachaud, G Bouhours, G Bourras, D Guerin, C Le Borgne, P Brisson, A Marsouin, A Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 1999 https://hal.science/hal-03284898 https://doi.org/10.1256/smsqj.56119 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1256/smsqj.56119 hal-03284898 https://hal.science/hal-03284898 doi:10.1256/smsqj.56119 ISSN: 0035-9009 EISSN: 1477-870X Quarterly Journal of the Royal Meteorological Society https://hal.science/hal-03284898 Quarterly Journal of the Royal Meteorological Society, 1999, 125 (561, C), pp.3563-3599. ⟨10.1256/smsqj.56119⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1999 ftunivnantes https://doi.org/10.1256/smsqj.56119 2023-02-08T04:21:16Z CATCH (Couplage avec 1' Atmosphere en Conditions Hivernales) was the oceanic component of FASTEX (Fronts and Atlantic Storm-Track EXperiment). It took place in January and February 1997, in the Newfoundland Basin near 47 degrees N, 40 degrees W, a region characterized by the presence of the warm North Atlantic Current and cold surrounding waters. CATCH was devoted to the study of the parametrization of surface turbulent fluxes in strong winds and changing directions, the surface-flux variability related to the passage of atmospheric fronts and the influence on fluxes of the strong sea surface temperature gradients associated with the North Atlantic Current. This paper presents first results of ship data analysis. A large range of wind and stratification conditions were experienced: 5% of measured winds were higher than 20 m s(-1); 30% of unstable stratification (air-sea temperature differences lower than −5 degC) and 30% of very dry conditions lair-sea moisture differences lower than -2.5 g kg(-1) were sampled. Surface turbulent heat and momentum fluxes were obtained using the inertial-dissipative method from which a bulk algorithm was derived. A significant increase of latent-heat and momentum-transfer coefficients with increasing wind is obtained, This parametrization is compared to others published using the CATCH dataset. For high winds and unstable stratifications, differences between schemes reach 200 W m(-2) for latent-heat flux values of 600 W m(-2). Radiative and turbulent ship-measured fluxes are compared with modelled fluxes from the European Centre for Medium-Range Forecasts (ECMWF) along the ship's trajectory: each component of the net heat budget is higher in the ECMWF model, consequently the heat loss of the ocean is 35% higher in the model. Finally, the effect of sea surface temperature fronts on surface turbulent fluxes is analysed by evaluating the contribution of the various terms in the Aux variations. showing a significant impact of the surface temperature change in all unperturbed cases. Article in Journal/Newspaper Newfoundland north atlantic current North Atlantic Université de Nantes: HAL-UNIV-NANTES Lair ENVELOPE(-61.040,-61.040,-62.618,-62.618) Quarterly Journal of the Royal Meteorological Society 125 561 3563 3599 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Eymard, L Caniaux, G Dupuis, H Prieur, L Giordani, H Troadec, R Bessemoulin, P Lachaud, G Bouhours, G Bourras, D Guerin, C Le Borgne, P Brisson, A Marsouin, A Surface fluxes in the North Atlantic current during CATCH/FASTEX |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
CATCH (Couplage avec 1' Atmosphere en Conditions Hivernales) was the oceanic component of FASTEX (Fronts and Atlantic Storm-Track EXperiment). It took place in January and February 1997, in the Newfoundland Basin near 47 degrees N, 40 degrees W, a region characterized by the presence of the warm North Atlantic Current and cold surrounding waters. CATCH was devoted to the study of the parametrization of surface turbulent fluxes in strong winds and changing directions, the surface-flux variability related to the passage of atmospheric fronts and the influence on fluxes of the strong sea surface temperature gradients associated with the North Atlantic Current. This paper presents first results of ship data analysis. A large range of wind and stratification conditions were experienced: 5% of measured winds were higher than 20 m s(-1); 30% of unstable stratification (air-sea temperature differences lower than −5 degC) and 30% of very dry conditions lair-sea moisture differences lower than -2.5 g kg(-1) were sampled. Surface turbulent heat and momentum fluxes were obtained using the inertial-dissipative method from which a bulk algorithm was derived. A significant increase of latent-heat and momentum-transfer coefficients with increasing wind is obtained, This parametrization is compared to others published using the CATCH dataset. For high winds and unstable stratifications, differences between schemes reach 200 W m(-2) for latent-heat flux values of 600 W m(-2). Radiative and turbulent ship-measured fluxes are compared with modelled fluxes from the European Centre for Medium-Range Forecasts (ECMWF) along the ship's trajectory: each component of the net heat budget is higher in the ECMWF model, consequently the heat loss of the ocean is 35% higher in the model. Finally, the effect of sea surface temperature fronts on surface turbulent fluxes is analysed by evaluating the contribution of the various terms in the Aux variations. showing a significant impact of the surface temperature change in all unperturbed cases. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Eymard, L Caniaux, G Dupuis, H Prieur, L Giordani, H Troadec, R Bessemoulin, P Lachaud, G Bouhours, G Bourras, D Guerin, C Le Borgne, P Brisson, A Marsouin, A |
author_facet |
Eymard, L Caniaux, G Dupuis, H Prieur, L Giordani, H Troadec, R Bessemoulin, P Lachaud, G Bouhours, G Bourras, D Guerin, C Le Borgne, P Brisson, A Marsouin, A |
author_sort |
Eymard, L |
title |
Surface fluxes in the North Atlantic current during CATCH/FASTEX |
title_short |
Surface fluxes in the North Atlantic current during CATCH/FASTEX |
title_full |
Surface fluxes in the North Atlantic current during CATCH/FASTEX |
title_fullStr |
Surface fluxes in the North Atlantic current during CATCH/FASTEX |
title_full_unstemmed |
Surface fluxes in the North Atlantic current during CATCH/FASTEX |
title_sort |
surface fluxes in the north atlantic current during catch/fastex |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-03284898 https://doi.org/10.1256/smsqj.56119 |
long_lat |
ENVELOPE(-61.040,-61.040,-62.618,-62.618) |
geographic |
Lair |
geographic_facet |
Lair |
genre |
Newfoundland north atlantic current North Atlantic |
genre_facet |
Newfoundland north atlantic current North Atlantic |
op_source |
ISSN: 0035-9009 EISSN: 1477-870X Quarterly Journal of the Royal Meteorological Society https://hal.science/hal-03284898 Quarterly Journal of the Royal Meteorological Society, 1999, 125 (561, C), pp.3563-3599. ⟨10.1256/smsqj.56119⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1256/smsqj.56119 hal-03284898 https://hal.science/hal-03284898 doi:10.1256/smsqj.56119 |
op_doi |
https://doi.org/10.1256/smsqj.56119 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
125 |
container_issue |
561 |
container_start_page |
3563 |
op_container_end_page |
3599 |
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1766109791590023168 |