Energiebilanz arktischer Bewölkung aus Modell und Beobachtung
This diploma thesis discusses the effect of clouds under arctic conditions on the energy balance at ground and the impact on sea ice and snow conditions. To calculate the energy balance is used an one-dimensional sea ice model from Andreas Lehmann. He is a scientist at the IFM-GEOMAR in the field of...
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ftoceanrep:oai:oceanrep.geomar.de:9251 2024-09-15T17:35:59+00:00 Energiebilanz arktischer Bewölkung aus Modell und Beobachtung Renkosik, Niko 2010 text https://oceanrep.geomar.de/id/eprint/9251/ https://oceanrep.geomar.de/id/eprint/9251/1/NRenkosik_Dipl_2010.pdf de ger https://oceanrep.geomar.de/id/eprint/9251/1/NRenkosik_Dipl_2010.pdf Renkosik, N. (2010) Energiebilanz arktischer Bewölkung aus Modell und Beobachtung. (Diploma thesis), Christian-Albrechts-Universität zu Kiel, Kiel, Germany, 105 pp. UrhG info:eu-repo/semantics/restrictedAccess Thesis NonPeerReviewed 2010 ftoceanrep 2024-08-06T14:04:11Z This diploma thesis discusses the effect of clouds under arctic conditions on the energy balance at ground and the impact on sea ice and snow conditions. To calculate the energy balance is used an one-dimensional sea ice model from Andreas Lehmann. He is a scientist at the IFM-GEOMAR in the field of research „theory and modelling “. The model for this thesis is taken from the threedimensional and dynamic ice model BSIOM(Jacob et al. (2006)). The energy balance is made up of incoming solar radiation with the surface albedo, the outgoing and incoming longwave radiation and the latent and sensible heat flux. The radiation flux dominate the energy balance in the Arctic. Therefore at first several parameterizations for incoming shortwave radiation and longwave counter-radiation are analysed with data from the expedition ARK-XXIV/3 of the research vessel Polarstern. For the analysis are put parameterizations for the global radiation from Zillman (1972), Shine (1984), Bennett (1982) and Shine/Bennett. Parameterizations by Maykut und Church (1973), Zillman (1972), König-Langlo und Augstein (1994), Konzelmann et al. (1994) and Zapadka et al. (2007) are used for the study of the longwave counter-radiation. The parameterizations of shortwave radiation can reflect the rough diurnal variations in global radiation. Nevertheless, there are considerable differences between observation and parameterization, if direct sunlight arrives ground under a high degree of cloud cover and it comes to short-term increase in radiation. These increases can not be reproduced by any of the parameterizations. In principle, the parameterizations tend to overestimate low values of shortwave radiation and to underestimate high values. The parameterizations of longwave counter-radiation have significant problems to reflect the diurnal variation of the measured values on some days. Especially after sunrise and before sunset are often the coverages of clouds from the cloud detection algorithms be misinterpreted on the sky imager photos. In these ... Thesis albedo Arktis* Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
German |
description |
This diploma thesis discusses the effect of clouds under arctic conditions on the energy balance at ground and the impact on sea ice and snow conditions. To calculate the energy balance is used an one-dimensional sea ice model from Andreas Lehmann. He is a scientist at the IFM-GEOMAR in the field of research „theory and modelling “. The model for this thesis is taken from the threedimensional and dynamic ice model BSIOM(Jacob et al. (2006)). The energy balance is made up of incoming solar radiation with the surface albedo, the outgoing and incoming longwave radiation and the latent and sensible heat flux. The radiation flux dominate the energy balance in the Arctic. Therefore at first several parameterizations for incoming shortwave radiation and longwave counter-radiation are analysed with data from the expedition ARK-XXIV/3 of the research vessel Polarstern. For the analysis are put parameterizations for the global radiation from Zillman (1972), Shine (1984), Bennett (1982) and Shine/Bennett. Parameterizations by Maykut und Church (1973), Zillman (1972), König-Langlo und Augstein (1994), Konzelmann et al. (1994) and Zapadka et al. (2007) are used for the study of the longwave counter-radiation. The parameterizations of shortwave radiation can reflect the rough diurnal variations in global radiation. Nevertheless, there are considerable differences between observation and parameterization, if direct sunlight arrives ground under a high degree of cloud cover and it comes to short-term increase in radiation. These increases can not be reproduced by any of the parameterizations. In principle, the parameterizations tend to overestimate low values of shortwave radiation and to underestimate high values. The parameterizations of longwave counter-radiation have significant problems to reflect the diurnal variation of the measured values on some days. Especially after sunrise and before sunset are often the coverages of clouds from the cloud detection algorithms be misinterpreted on the sky imager photos. In these ... |
format |
Thesis |
author |
Renkosik, Niko |
spellingShingle |
Renkosik, Niko Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
author_facet |
Renkosik, Niko |
author_sort |
Renkosik, Niko |
title |
Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
title_short |
Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
title_full |
Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
title_fullStr |
Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
title_full_unstemmed |
Energiebilanz arktischer Bewölkung aus Modell und Beobachtung |
title_sort |
energiebilanz arktischer bewölkung aus modell und beobachtung |
publishDate |
2010 |
url |
https://oceanrep.geomar.de/id/eprint/9251/ https://oceanrep.geomar.de/id/eprint/9251/1/NRenkosik_Dipl_2010.pdf |
genre |
albedo Arktis* Sea ice |
genre_facet |
albedo Arktis* Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/9251/1/NRenkosik_Dipl_2010.pdf Renkosik, N. (2010) Energiebilanz arktischer Bewölkung aus Modell und Beobachtung. (Diploma thesis), Christian-Albrechts-Universität zu Kiel, Kiel, Germany, 105 pp. |
op_rights |
UrhG info:eu-repo/semantics/restrictedAccess |
_version_ |
1810486505221652480 |