{"id":6072,"date":"2026-10-19T09:48:26","date_gmt":"2026-10-19T09:48:26","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-umhverfisfraedi-tim-sonnemann\/"},"modified":"2026-10-19T09:48:26","modified_gmt":"2026-10-19T09:48:26","slug":"doktorsvorn-i-umhverfisfraedi-tim-sonnemann","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-umhverfisfraedi-tim-sonnemann\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed umhverfisfr\u00e6\u00f0i – Tim Sonnemann"},"content":{"rendered":"
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Doktorsefni:<\/strong>\u00a0Tim Sonnemann<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Bayes\u00edsk kv\u00f6r\u00f0un \u00e1 jar\u00f0skj\u00e1lftal\u00edk\u00f6num og hermun yfirbor\u00f0shreyfinga af v\u00f6ldum Su\u00f0urlandsskj\u00e1lfta<\/p>\n

Andm\u00e6lendur:<\/strong><\/p>\n

John Douglas, lektor vi\u00f0 Umhverfis- og byggingarverkfr\u00e6\u00f0ideild vi\u00f0 H\u00e1sk\u00f3lann \u00ed Strathclyde, Glasgow \u00ed Skotlandi.<\/p>\n

Dr. Benjamin Edwards, pr\u00f3fessor vi\u00f0 Jar\u00f0-, haf- og vistfr\u00e6\u00f0ideild \u00e1 Umhverfisv\u00edsindasvi\u00f0i H\u00e1sk\u00f3lans \u00ed Liverpool, Bretlandi.<\/p>\n

Lei\u00f0beinandi:<\/strong><\/p>\n

Dr. Benedikt Halld\u00f3rsson,\u00a0ranns\u00f3knarpr\u00f3fessor vi\u00f0 umhverfis- og byggingarverkfr\u00e6\u00f0ideild H\u00e1sk\u00f3la \u00cdslands \u00e1 verkfr\u00e6\u00f0i- og n\u00e1tt\u00faruv\u00edsindasvi\u00f0i, forst\u00f6\u00f0uma\u00f0ur ranns\u00f3kna vi\u00f0 Ranns\u00f3knarmi\u00f0st\u00f6\u00f0 H\u00e1sk\u00f3la \u00cdslands \u00ed jar\u00f0skj\u00e1lftaverkfr\u00e6\u00f0i, og s\u00e9rfr\u00e6\u00f0ingur vi\u00f0 \u00farvinnslu- og ranns\u00f3knasvi\u00f0 Ve\u00f0urstofu \u00cdslands.<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong><\/p>\n

Dr. Sigurj\u00f3n J\u00f3nsson, pr\u00f3fessor \u00ed jar\u00f0e\u00f0lisfr\u00e6\u00f0i vi\u00f0 King Abdullah v\u00edsinda- og t\u00e6knih\u00e1sk\u00f3lann \u00ed Saudi Arab\u00edu.<\/p>\n

Dr. Birgir Hrafnkelsson, pr\u00f3fessor \u00ed t\u00f6lfr\u00e6\u00f0i vi\u00f0 Raunv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands.<\/p>\n

Dr. Apostolos S. Papageorgiou, pr\u00f3fessor vi\u00f0 byggingarverkfr\u00e6\u00f0ideild H\u00e1sk\u00f3lans \u00ed Patras, Grikklandi.<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0<\/p>\n

Gu\u00f0mundur Freyr \u00dalfarsson, pr\u00f3fessor og deildarforseti Umhverfis- og byggingarverkfr\u00e6\u00f0ideildar, Verkfr\u00e6\u00f0i- og n\u00e1tt\u00faruv\u00edsindasvi\u00f0i, H\u00e1sk\u00f3la \u00cdslands.<\/p>\n

\u00c1grip:<\/strong><\/p>\n

Heildst\u00e6tt l\u00edkan af yfirbor\u00f0shreyfingum \u00ed jar\u00f0skj\u00e1lftum \u00e1 brotabelti Su\u00f0urlands hefur veri\u00f0 \u00fer\u00f3a\u00f0 \u00ed \u00feessu verkefni. S\u00f6kum f\u00e6\u00f0ar m\u00e6ligagna st\u00f3rra jar\u00f0skj\u00e1lfta \u00e1 \u00cdslandi og vangetu l\u00edkana sem \u00fer\u00f3u\u00f0 hafa veri\u00f0 me\u00f0 g\u00f6gnum fr\u00e1 \u00f6\u00f0rum jar\u00f0skj\u00e1lftasv\u00e6\u00f0um til a\u00f0 l\u00fdsa yfirbor\u00f0shreyfingum jar\u00f0skj\u00e1lftum \u00e1 \u00cdslandi, hefur e\u00f0lisfr\u00e6\u00f0ilegt l\u00edkan veri\u00f0 b\u00fai\u00f0 til sem sameinar \u00e1kvar\u00f0anlega hermun \u00e1 yfirbor\u00f0shreyfingum og slembihermun \u00feeirra gerviskj\u00e1lftarit sem felur \u00ed s\u00e9r bylgjuhreyfingar \u00e1 l\u00e1gum sem h\u00e1um t\u00ed\u00f0num.<\/p>\n

\u00c1 h\u00e1um t\u00ed\u00f0num hefur e\u00f0lishindranal\u00edkani\u00f0 (e. specific barrier model) veri\u00f0 kvar\u00f0a\u00f0 me\u00f0 slembia\u00f0fer\u00f0um vi\u00f0 m\u00e6lig\u00f6gn v\u00e6gra og sterkra jar\u00f0skj\u00e1lfta \u00e1 Su\u00f0urlandi. Stikar l\u00edkansins hafa veri\u00f0 \u00e1kvar\u00f0a\u00f0ir me\u00f0 n\u00e6mnisgreiningu til \u00feess a\u00f0 meta \u00f3vissu \u00feeirra og st\u00f6\u00f0ugleika kv\u00f6r\u00f0unarinnar me\u00f0 a\u00f0fer\u00f0um Bayes\u00edskrar t\u00f6lfr\u00e6\u00f0i og Monte Carlo hermunum \u00e1 Markov ke\u00f0jum.<\/p>\n

Auk \u00feess voru eigindi dv\u00ednunar m\u00e6ldrar yfirbor\u00f0shr\u00f6\u00f0unar \u00e1 h\u00e1um t\u00ed\u00f0num \u00e1kv\u00f6r\u00f0u\u00f0 \u00ed t\u00ed\u00f0nir\u00faminu me\u00f0 n\u00fdrri, sj\u00e1lfvirki og a\u00f0l\u00f6gunarh\u00e6fri reiknia\u00f0fer\u00f0 sem \u00fer\u00f3u\u00f0 hefur veri\u00f0 \u00ed verkefninu. \u00de\u00e1 var e\u00f0lishindranal\u00edkani\u00f0 \u00fatv\u00edkka\u00f0 \u00far punktl\u00fdsingu jar\u00f0skj\u00e1lftaupptaka yfir \u00ed l\u00fdsingu \u00e1 sprungu af endanlegri st\u00e6r\u00f0 \u00fear sem heildarbrot \u00ed jar\u00f0skj\u00e1lftanum er herma\u00f0 me\u00f0 fj\u00f6lda sprungubrota af margv\u00edslegum st\u00e6r\u00f0um.<\/p>\n

\u00deannig f\u00e6st raunh\u00e6fari mynd af sprungubroti \u00ed st\u00e6rri jar\u00f0skj\u00e1lftum og h\u00e1t\u00ed\u00f0nigerviskj\u00e1lftaritum \u00feeirra. \u00c1 l\u00e1gum t\u00ed\u00f0num er \u00e1kvar\u00f0anlegt og gangfr\u00e6\u00f0ilegt l\u00edkan \u00ed lagskiptu h\u00e1lfr\u00fami, byggt \u00e1 einf\u00f6ldum grunnforsendum, nota\u00f0 til a\u00f0 herma framl\u00f6g \u00f3l\u00edkra sprungubrota me\u00f0 mismunandi f\u00e6rsluferli og \u00fatbrei\u00f0sluhra\u00f0a brots til yfirbor\u00f0shreyfinga \u00ed jar\u00f0skj\u00e1lftum.<\/p>\n

S\u00fdnt hefur veri\u00f0 fram \u00e1 a\u00f0 sameinu\u00f0u gerviskj\u00e1lftaritin \u00e1 h\u00e1um sem l\u00e1gum t\u00ed\u00f0num l\u00fdsa a\u00f0 jafna\u00f0i \u00f6llum helstu eiginleikum m\u00e6ldra jar\u00f0skj\u00e1lftarita \u00ed st\u00f3rum jar\u00f0skj\u00e1lftum \u00e1 Su\u00f0urlandi. Hi\u00f0 n\u00fdja e\u00f0lisfr\u00e6\u00f0ilega hefur einnig stu\u00f0la\u00f0 a\u00f0 \u00fer\u00f3un n\u00fdrra eigindlegra l\u00edkana af h\u00e1gildum yfirbor\u00f0shreyfinga \u00ed jar\u00f0skj\u00e1lftum \u00e1 \u00cdslandi me\u00f0 n\u00fdtingu uppl\u00fdsandi forsendna \u00ed Bayes\u00edskri kv\u00f6r\u00f0un \u00fat fr\u00e1 uppl\u00fdsingum fr\u00e1 \u00f6\u00f0rum sl\u00edkum l\u00edk\u00f6num. Hin n\u00fdju l\u00edk\u00f6n s\u00fdna \u00f3tv\u00edr\u00e6tt fram \u00e1 raunh\u00e6fa deyfingu yfirbor\u00f0shreyfinga \u00ed n\u00e6rsvi\u00f0i st\u00f3rra jar\u00f0skj\u00e1lfta og mynda forsendu \u00ed endurmati jar\u00f0skj\u00e1lftah\u00e6ttu \u00e1 \u00cdslandi.<\/p>\n

Um doktorsefni\u00f0:<\/strong><\/p>\n

Tim Sonnemann er f\u00e6ddur \u00e1ri\u00f0 1988 \u00ed \u00de\u00fdskalandi. Hann lauk grunnpr\u00f3fi \u00ed jar\u00f0v\u00edsindum \u00e1ri\u00f0 2011 og meistarapr\u00f3fi \u00e1ri\u00f0 2014 fr\u00e1 Potsdam h\u00e1sk\u00f3lanum \u00ed \u00de\u00fdskalandi.<\/p>\n

Ranns\u00f3knir hans fj\u00f6llu\u00f0u um greiningu \u00e1 g\u00f6gnum fr\u00e1 \u00fe\u00e9ttum jar\u00f0skj\u00e1lftam\u00e6lanetum og greiningu \u00e1 hra\u00f0astr\u00fakt\u00far me\u00f0 endurkastsg\u00f6gnum.<\/p>\n

Hann starfa\u00f0i \u00ed Bergen \u00ed Noregi sem s\u00e9rfr\u00e6\u00f0ingur \u00ed greiningu \u00e1 g\u00f6gnum fr\u00e1 Norska jar\u00f0skj\u00e1lftam\u00e6lanetinu, og vi\u00f0 ranns\u00f3knir vi\u00f0 GFZ stofnunina \u00ed Potsdam, \u00de\u00fdskalandi.<\/p>\n

Doktorsn\u00e1m hans \u00ed umhverfisv\u00edsindum vi\u00f0 H\u00e1sk\u00f3la \u00cdslands var hluti af \u00f6ndvegisverkefni Rann\u00eds sem h\u00f3fst \u00e1ri\u00f0 2014. Samhli\u00f0a \u00fev\u00ed hefur hann s\u00f3tt n\u00e1mskei\u00f0 \u00ed Bayes\u00edskri t\u00f6lfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3la \u00cdslands og n\u00e1mskei\u00f0 \u00ed jar\u00f0skj\u00e1lftaverkfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3lann \u00ed Patras \u00ed Grikklandi.<\/p>\n

Eftir doktorsn\u00e1mi\u00f0 liggja \u00ferj\u00e1r t\u00edmaritsgreinar, fj\u00f3rar ritr\u00fdndar r\u00e1\u00f0stefnugreinar, auk fullb\u00fains handrits og margra fyrirlestra og veggspjalda \u00e1 r\u00e1\u00f0stefnum. Hann hefur hloti\u00f0 fer\u00f0atyrk og vi\u00f0urkenningu fyrir framlag nemanda \u00e1ri\u00f0 2017 \u00e1 r\u00e1\u00f0stefnu jar\u00f0skj\u00e1lftafr\u00e6\u00f0af\u00e9lags Bandar\u00edkjanna, og fer\u00f0astyrk fr\u00e1 Erasmus+ \u00e1\u00e6tluninni til a\u00f0 stunda ranns\u00f3knir vi\u00f0 H\u00e1sk\u00f3lann \u00ed Patras, Grikklandi \u00e1ri\u00f0 2016. Hann hefur starfa\u00f0 sem s\u00e9rfr\u00e6\u00f0ingur \u00ed greiningu jar\u00f0skj\u00e1lftagagna \u00e1 \u00farvinnslu- og ranns\u00f3knarsvi\u00f0i Ve\u00f0urstofu \u00cdslands fr\u00e1 2018.<\/p>\n<\/div><\/div>","protected":false},"featured_media":1736,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2019-06-25T13:00:00+00:00","_phd_date_end":"2019-06-25T15:00:00+00:00","_phd_location":"H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"Allir velkomnir","_phd_thesis_title":"Bayes\u00edsk kv\u00f6r\u00f0un \u00e1 jar\u00f0skj\u00e1lftal\u00edk\u00f6num og hermun yfirbor\u00f0shreyfinga af v\u00f6ldum Su\u00f0urlandsskj\u00e1lfta","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_umhverfisfraedi_tim_sonnemann","_phd_source_node_id":"322265","_phd_source_type":"vidburdir","_phd_member_id":423,"footnotes":""},"phd_school":[98,93],"phd_discipline":[99],"class_list":["post-6072","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-umhverfis-og-byggingarverkfraedideild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-umhverfisfraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6072","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6072\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/1736"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6072"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6072"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}