Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast
This thesis presents research on two topics related to sea level in the Baltic Sea: regional sea level rise and meteotsunamis, i.e. meteorologically generated tsunami waves. While these phenomena act on very different time scales, they are both relevant for estimates of coastal flooding risks. Main...
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Helsingin yliopisto
2020
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/315759 2023-08-20T04:02:19+02:00 Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast Sinimusta horisontti : merenpinnan nousu ja säätsunamit Suomen rannikolla Pellikka, Havu Weisse, Ralf University of Helsinki, Faculty of Science, Institute for Atmospheric and Earth System Research Doctoral Programme in Atmospheric Sciences Finnish Meteorological Institute Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta Ilmakehätieteiden tohtoriohjelma Helsingfors universitet, matematisk-naturvetenskapliga fakulteten Doktorandprogrammet i atmosfärvetenskap Kahma, Kimmo Johansson, Milla 2020-06-05T04:45:39Z application/pdf http://hdl.handle.net/10138/315759 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-952-336-111-9 Helsinki: Edita Prima Oy, 2020, Finnish Meteorological Institute Contributions 167. 0782-6117 http://hdl.handle.net/10138/315759 URN:ISBN:978-952-336-112-6 Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. geofysiikka Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2020 ftunivhelsihelda 2023-07-28T06:07:24Z This thesis presents research on two topics related to sea level in the Baltic Sea: regional sea level rise and meteotsunamis, i.e. meteorologically generated tsunami waves. While these phenomena act on very different time scales, they are both relevant for estimates of coastal flooding risks. Main objectives of this work are i) to present projections of mean sea level change in Finland by 2100 as location-specific probability distributions that can be used as a basis for decision-making in coastal management, and ii) to study the occurrence of meteotsunamis on the Finnish coast and the weather conditions that create these waves. Global mean sea level is rising in the warming climate. This will affect coastal life worldwide, but sea level does not rise uniformly around the globe. Projections of future sea level rise have large uncertainties, especially because the response of the Antarctic ice sheet to climatic changes is poorly known. This makes the upper tail of the probability distribution of sea level rise hard to pin down. In this work, an ensemble of global sea level rise projections is adjusted regionally to form a probability distribution of regional sea level rise. The results suggest that sea level rise in the Baltic Sea will be about 80% of the global mean, without including the effect of land uplift. To obtain probability distributions of mean sea level change relative to land, the effects of postglacial land uplift and wind-induced changes in mean sea level are combined with the sea level rise distributions. According to the average scenario, the sea level in the Gulf of Finland is expected to rise ca. 30 cm in 2000–2100, while mean sea level decline will continue in the Gulf of Bothnia. However, the high-end scenario projects sea level rise everywhere on the Finnish coast, ranging from 21 cm in Vaasa to 90 cm in Hamina. Meteotsunamis occur in shallow sea areas worldwide and can reach a height of several metres in extreme cases. In the Baltic Sea, such high, inexplicable sea waves are historically ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Ice Sheet Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Antarctic Hamina ENVELOPE(25.076,25.076,70.093,70.093) Nousu ENVELOPE(28.634,28.634,67.158,67.158) The Antarctic |
institution |
Open Polar |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
geofysiikka |
spellingShingle |
geofysiikka Pellikka, Havu Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
topic_facet |
geofysiikka |
description |
This thesis presents research on two topics related to sea level in the Baltic Sea: regional sea level rise and meteotsunamis, i.e. meteorologically generated tsunami waves. While these phenomena act on very different time scales, they are both relevant for estimates of coastal flooding risks. Main objectives of this work are i) to present projections of mean sea level change in Finland by 2100 as location-specific probability distributions that can be used as a basis for decision-making in coastal management, and ii) to study the occurrence of meteotsunamis on the Finnish coast and the weather conditions that create these waves. Global mean sea level is rising in the warming climate. This will affect coastal life worldwide, but sea level does not rise uniformly around the globe. Projections of future sea level rise have large uncertainties, especially because the response of the Antarctic ice sheet to climatic changes is poorly known. This makes the upper tail of the probability distribution of sea level rise hard to pin down. In this work, an ensemble of global sea level rise projections is adjusted regionally to form a probability distribution of regional sea level rise. The results suggest that sea level rise in the Baltic Sea will be about 80% of the global mean, without including the effect of land uplift. To obtain probability distributions of mean sea level change relative to land, the effects of postglacial land uplift and wind-induced changes in mean sea level are combined with the sea level rise distributions. According to the average scenario, the sea level in the Gulf of Finland is expected to rise ca. 30 cm in 2000–2100, while mean sea level decline will continue in the Gulf of Bothnia. However, the high-end scenario projects sea level rise everywhere on the Finnish coast, ranging from 21 cm in Vaasa to 90 cm in Hamina. Meteotsunamis occur in shallow sea areas worldwide and can reach a height of several metres in extreme cases. In the Baltic Sea, such high, inexplicable sea waves are historically ... |
author2 |
Weisse, Ralf University of Helsinki, Faculty of Science, Institute for Atmospheric and Earth System Research Doctoral Programme in Atmospheric Sciences Finnish Meteorological Institute Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta Ilmakehätieteiden tohtoriohjelma Helsingfors universitet, matematisk-naturvetenskapliga fakulteten Doktorandprogrammet i atmosfärvetenskap Kahma, Kimmo Johansson, Milla |
format |
Doctoral or Postdoctoral Thesis |
author |
Pellikka, Havu |
author_facet |
Pellikka, Havu |
author_sort |
Pellikka, Havu |
title |
Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
title_short |
Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
title_full |
Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
title_fullStr |
Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
title_full_unstemmed |
Dark-blue horizon : Sea level rise and meteotsunamis on the Finnish coast |
title_sort |
dark-blue horizon : sea level rise and meteotsunamis on the finnish coast |
publisher |
Helsingin yliopisto |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/315759 |
long_lat |
ENVELOPE(25.076,25.076,70.093,70.093) ENVELOPE(28.634,28.634,67.158,67.158) |
geographic |
Antarctic Hamina Nousu The Antarctic |
geographic_facet |
Antarctic Hamina Nousu The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
URN:ISBN:978-952-336-111-9 Helsinki: Edita Prima Oy, 2020, Finnish Meteorological Institute Contributions 167. 0782-6117 http://hdl.handle.net/10138/315759 URN:ISBN:978-952-336-112-6 |
op_rights |
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. |
_version_ |
1774712738830876672 |