Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea
High-resolution Eulerian and Lagrangian sea ice kinematics are examined based on an ADCP and four icebound drifting buoys in the Gulf of Finland, Baltic Sea. The measurements were performed in the central Gulf of Finland in winter 2010 from January to March. Ice drift was mostly in near-free drift s...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/310737 2024-01-07T09:42:29+01:00 Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea Lilover, Madis-Jaak Pavelson, Juss Kouts, Tarmo Lepparanta, Matti Institute for Atmospheric and Earth System Research (INAR) Department of Physics 2020-01-31T08:02:03Z 17 application/pdf http://hdl.handle.net/10138/310737 eng eng Finnish Environment Institute Preliminary results were obtained within the FP7 EU-funded project "Safety of winter navigation in dynamic ice" (contract SCP8-GA-2009-233884 - SAFEWIN). Later on, the study was partly supported by Estonian Science Foundation grant no. ETF9381 and by institutional research funding (IUT19-6) of the Estonian Ministry of Education and Research. We are grateful to the crew and the scientific team of the R/V Aranda led by Dr. Jari Haapala, for assistance in the deployment of the drifting buoys and to Kaimo Vahter for the assistance in drifter data processing. The authors thank NASA's Goddard Space Flight Center for providing MODIS data and E.U. Copernicus Marine Service Information for providing sea ice concentration data. Special thanks go to Liis Sipelgas and Ove Parn who processed the MODIS and ice concentration data respectively. Also, we thank anonymous reviewers for their helpful comments. Lilover , M-J , Pavelson , J , Kouts , T & Lepparanta , M 2018 , ' Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea ' , Boreal Environment Research , vol. 23 , pp. 175-191 . fe91fa43-73e7-4579-b9b5-af278fe13026 http://hdl.handle.net/10138/310737 000458689100012 unspecified openAccess info:eu-repo/semantics/openAccess WIND DRIFT 1171 Geosciences Environmental Sciences Article publishedVersion 2020 ftunivhelsihelda 2023-12-14T00:11:36Z High-resolution Eulerian and Lagrangian sea ice kinematics are examined based on an ADCP and four icebound drifting buoys in the Gulf of Finland, Baltic Sea. The measurements were performed in the central Gulf of Finland in winter 2010 from January to March. Ice drift was mostly in near-free drift state driven by winds and ice-independent currents in the basin. Internal friction was significant, apart from off-ice forcing toward the open boundary. The averaged asymptotic ice/wind speed ratio and deviation angle at higher wind speeds were 0.034 and 9 degrees in the oceanic boundary layer, respectively. The ratio depended on the direction of the wind indicating the role of morphometry of the coast to the local ice kinematics. The maximum values of wind ratio were observed in cases of NE winds and minimum values in cases of SW winds. Coherent ice drift was observed up to a distance of 42 km. High-resolution Eulerian and Lagrangian sea ice kinematics are examined based on an ADCP and four icebound drifting buoys in the Gulf of Finland, Baltic Sea. The measurements were performed in the central Gulf of Finland in winter 2010 from January to March. Ice drift was mostly in near-free drift state driven by winds and ice-independent currents in the basin. Internal friction was significant, apart from off-ice forcing toward the open boundary. The averaged asymptotic ice/wind speed ratio and deviation angle at higher wind speeds were 0.034 and 9 degrees in the oceanic boundary layer, respectively. The ratio depended on the direction of the wind indicating the role of morphometry of the coast to the local ice kinematics. The maximum values of wind ratio were observed in cases of NE winds and minimum values in cases of SW winds. Coherent ice drift was observed up to a distance of 42 km. Peer reviewed Article in Journal/Newspaper Boreal Environment Research Sea ice HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
WIND DRIFT 1171 Geosciences Environmental Sciences |
spellingShingle |
WIND DRIFT 1171 Geosciences Environmental Sciences Lilover, Madis-Jaak Pavelson, Juss Kouts, Tarmo Lepparanta, Matti Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
topic_facet |
WIND DRIFT 1171 Geosciences Environmental Sciences |
description |
High-resolution Eulerian and Lagrangian sea ice kinematics are examined based on an ADCP and four icebound drifting buoys in the Gulf of Finland, Baltic Sea. The measurements were performed in the central Gulf of Finland in winter 2010 from January to March. Ice drift was mostly in near-free drift state driven by winds and ice-independent currents in the basin. Internal friction was significant, apart from off-ice forcing toward the open boundary. The averaged asymptotic ice/wind speed ratio and deviation angle at higher wind speeds were 0.034 and 9 degrees in the oceanic boundary layer, respectively. The ratio depended on the direction of the wind indicating the role of morphometry of the coast to the local ice kinematics. The maximum values of wind ratio were observed in cases of NE winds and minimum values in cases of SW winds. Coherent ice drift was observed up to a distance of 42 km. High-resolution Eulerian and Lagrangian sea ice kinematics are examined based on an ADCP and four icebound drifting buoys in the Gulf of Finland, Baltic Sea. The measurements were performed in the central Gulf of Finland in winter 2010 from January to March. Ice drift was mostly in near-free drift state driven by winds and ice-independent currents in the basin. Internal friction was significant, apart from off-ice forcing toward the open boundary. The averaged asymptotic ice/wind speed ratio and deviation angle at higher wind speeds were 0.034 and 9 degrees in the oceanic boundary layer, respectively. The ratio depended on the direction of the wind indicating the role of morphometry of the coast to the local ice kinematics. The maximum values of wind ratio were observed in cases of NE winds and minimum values in cases of SW winds. Coherent ice drift was observed up to a distance of 42 km. Peer reviewed |
author2 |
Institute for Atmospheric and Earth System Research (INAR) Department of Physics |
format |
Article in Journal/Newspaper |
author |
Lilover, Madis-Jaak Pavelson, Juss Kouts, Tarmo Lepparanta, Matti |
author_facet |
Lilover, Madis-Jaak Pavelson, Juss Kouts, Tarmo Lepparanta, Matti |
author_sort |
Lilover, Madis-Jaak |
title |
Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
title_short |
Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
title_full |
Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
title_fullStr |
Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
title_full_unstemmed |
Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea |
title_sort |
characteristics of high-resolution sea ice dynamics in the gulf of finland, baltic sea |
publisher |
Finnish Environment Institute |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/310737 |
genre |
Boreal Environment Research Sea ice |
genre_facet |
Boreal Environment Research Sea ice |
op_relation |
Preliminary results were obtained within the FP7 EU-funded project "Safety of winter navigation in dynamic ice" (contract SCP8-GA-2009-233884 - SAFEWIN). Later on, the study was partly supported by Estonian Science Foundation grant no. ETF9381 and by institutional research funding (IUT19-6) of the Estonian Ministry of Education and Research. We are grateful to the crew and the scientific team of the R/V Aranda led by Dr. Jari Haapala, for assistance in the deployment of the drifting buoys and to Kaimo Vahter for the assistance in drifter data processing. The authors thank NASA's Goddard Space Flight Center for providing MODIS data and E.U. Copernicus Marine Service Information for providing sea ice concentration data. Special thanks go to Liis Sipelgas and Ove Parn who processed the MODIS and ice concentration data respectively. Also, we thank anonymous reviewers for their helpful comments. Lilover , M-J , Pavelson , J , Kouts , T & Lepparanta , M 2018 , ' Characteristics of high-resolution sea ice dynamics in the Gulf of Finland, Baltic Sea ' , Boreal Environment Research , vol. 23 , pp. 175-191 . fe91fa43-73e7-4579-b9b5-af278fe13026 http://hdl.handle.net/10138/310737 000458689100012 |
op_rights |
unspecified openAccess info:eu-repo/semantics/openAccess |
_version_ |
1787423468306825216 |