Personkort bilde

Ofstad, Siri

PhD candidate, CAGE NTF/IG - Center for Arctic Gas Hydrate, Environment and Climate
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  • Ofstad, Siri; Zamelczyk, Katarzyna; Kimoto, Katsunori; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Shell density of planktonic foraminifera and pteropod species Limacina helicina in the Barents Sea: Relation to ontogeny and water chemistry. PLOS ONE 2021; Volum 16 (4). ISSN 1932-6203.s doi: 10.1371/journal.pone.0249178.

  • Ofstad, Siri; Meilland, Julie; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Gründger, Friederike; Rasmussen, Tine Lander. Development, productivity, and seasonality of living planktonic foraminiferal faunas and Limacina helicina in an area of intense methane seepage in the Barents Sea. Journal of Geophysical Research (JGR): Biogeosciences 2020; Volum 125 (2). ISSN 2169-8953.s doi: 10.1029/2019JG005387.

  • Ofstad, Siri; Meilland, Julie; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Gründger, Friederike; Rasmussen, Tine Lander. Seasonal development of key marine calcifiers in an area of intense methane seepage in the Barents Sea. AMGG Research School Annual Meeting 2019 2019-11-08 - 2019.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Kimoto, Katsunori; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Polar planktonic foraminiferal tests and carbonate chemistry – a comparison between paleo-proxies and MXCT analysis. FORAMS2018 2018-06-17 - 2018-06-22 2018.

  • Rasmussen, Tine Lander; Laberg, Jan Sverre; Ofstad, Siri; Rydningen, Tom Arne; Åström, Emmelie Karin Linnea; El Bani Altuna, Naima; Lasabuda, Amando Putra Ersaid; Carroll, Michael Leslie. Cruise report - AMGG Cruise to the northern and eastern Svalbard margin on R/V Helmer Hanssen, August 31st – September 12th, 2018. 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Kimoto, Katsunori; Rasmussen, Tine Lander. MXCT Study of Planktic Foraminifera from the Barents Sea. Marine Ecosystem Dynamics Research Group's Seminar 2018-05-18 - 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Kimoto, Katsunori; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Methane-induced Ocean Acidification and Planktic Foraminifera Calcification in the Northern Barents Sea. 33rd International Symposium on Okhotsk Sea & Polar Oceans 2018-02-17 - 2018-02-22 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Methane-induced Ocean Acidification and Planktic Foraminifera Calcification. Marine Ecosystem Dynamics Research Group's Seminar 2018-01-26 - 2018.

  • Rasmussen, Tine Lander; Nielsen, Tove; Ofstad, Siri; Åström, Emmelie Karin Linnea; El Bani Altuna, Naima; Laier, Troels; Sen, Arunima; Chitkara, Cheshtaa; Frolova, Anastasiia; Mamadzhanian, Anna. CAGE-18-3 Cruise to the Barents Sea, Storfjorden Trough, East Greenland Ridge (Leg 1, 2), Arctic Ocean, Vestnesa Ridge, and PKF (Leg 3). 2018.

  • Seidenkrantz, Marit-Solveig; Andersen, Jan R.; Andresen, Katrine Juul; Bendtsen, Jørgen; Brice, Camille; Ellegaard, Marianne; Eriksen, Lasse Nygaard; Gariboldi, Karen; LeDuc, Cynthia; Mathiasen, Anders M.; Nielsen, Tove; Ofstad, Siri; Pearce, Christof; Rasmussen, Tine Lander; Ribeiro, Sofia; Rysgaard, Søren; Røy, Hans; Scholze, Caroline; Schultz, Mads; Wangner, David. NorthGreen2017 – a marine research expedition to NE Greenland onboard ‘R/V Dana’. Cruise Report. 2018.

  • Ofstad, Siri; Zamelczyk, Kasia; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Ocean Acidification in the Fram Strait-Barents Sea Region – Effects on Modern Planktic Foraminifera. Ecosystem Studies of Sub-Arctic and Arctic Seas - ESSAS 2017-06-11 - 2017-06-15 2017.

  • Ofstad, Siri; Zamelczyk, Kasia; Chierici, Melissa; Fransson, Agneta; Serov, Pavel; Rasmussen, Tine Lander. Methane-induced Ocean Acidification in the Northern Barents Sea. Arctic Change 2017 2017-12-11 - 2017-12-15 2017.

  • Rasmussen, Tine Lander; Ezat, Mohamed; Melaniuk, Katarzyna; Ofstad, Siri; Schneider, Andrea; Sen, Arunima; Åström, Emmelie. Cruise Report GEO-3111 (Reconstructing Quaternary Marine Climate and Environments) and GEO-3122 (Micropaleontology) on RV Helmer Hanssen November 2-5, 2017. 2017.

  • Rasmussen, Tine Lander; Sztybor, Kamila; Meilland, Julie; Ofstad, Siri; Ezat, Mohamed; Baker, May. CAGE-OA February Cruise to the western Svalbard margin and the western Barents Sea slope on R/V Helmer Hanssen, February 8th – February 15th, 2016. 2016.

  • Ofstad, Siri. Anthropogenic Carbon Dioxide and Methane Induced Ocean Acidification in the Arctic Ocean, effects on modern planktonic foraminifera. AMGG research school meeting 2016-04-11 - 2016-04-12 2016.

  • Rasmussen, Tine Lander; Nielsen, Tove; Laier, Troels; Ezat, Mohamed M.; Meilland, Julie; Ofstad, Siri; Nystedt, Elina; Pecori, Evelyn. CAGE-PWC April Cruise to the Western Svalbard Margin on R/V Helmer Hanssen, April 22nd – May 1st, 2016. 2016.

  • Rydningen, Tom Arne; Rasmussen, Tine Lander; Meilland, Julie; Ofstad, Siri; Osti, Giacomo; Schneider, Andrea; Schreck, Michael. CRUISE REPORT: Educational cruises to Rebbenesdjupet, Hamrefjorden, Råsa, Helgøyfjorden, Malangen and Målselvfjorden. GEO-3111 Reconstructing Marine Climate and Environments GEO-3121 Marine Geology and GEO-3122 Micropaleontology on R/V Helmer Hanssen, October 8th-10th and 13th-15th, 2016. 2016.

  • Ofstad, Siri; Meilland, Julie; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Gründger, Friederike; Rasmussen, Tine Lander. Seasonal development of key marine calcifiers in an area of intense methane seepage in the Barents Sea. AMGG Research School Annual Meeting 2019 2019-11-08 - 2019.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Kimoto, Katsunori; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Polar planktonic foraminiferal tests and carbonate chemistry – a comparison between paleo-proxies and MXCT analysis. FORAMS2018 2018-06-17 - 2018-06-22 2018.

  • Rasmussen, Tine Lander; Laberg, Jan Sverre; Ofstad, Siri; Rydningen, Tom Arne; Åström, Emmelie Karin Linnea; El Bani Altuna, Naima; Lasabuda, Amando Putra Ersaid; Carroll, Michael Leslie. Cruise report - AMGG Cruise to the northern and eastern Svalbard margin on R/V Helmer Hanssen, August 31st – September 12th, 2018. 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Kimoto, Katsunori; Rasmussen, Tine Lander. MXCT Study of Planktic Foraminifera from the Barents Sea. Marine Ecosystem Dynamics Research Group's Seminar 2018-05-18 - 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Kimoto, Katsunori; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Methane-induced Ocean Acidification and Planktic Foraminifera Calcification in the Northern Barents Sea. 33rd International Symposium on Okhotsk Sea & Polar Oceans 2018-02-17 - 2018-02-22 2018.

  • Ofstad, Siri; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Methane-induced Ocean Acidification and Planktic Foraminifera Calcification. Marine Ecosystem Dynamics Research Group's Seminar 2018-01-26 - 2018.

  • Rasmussen, Tine Lander; Nielsen, Tove; Ofstad, Siri; Åström, Emmelie Karin Linnea; El Bani Altuna, Naima; Laier, Troels; Sen, Arunima; Chitkara, Cheshtaa; Frolova, Anastasiia; Mamadzhanian, Anna. CAGE-18-3 Cruise to the Barents Sea, Storfjorden Trough, East Greenland Ridge (Leg 1, 2), Arctic Ocean, Vestnesa Ridge, and PKF (Leg 3). 2018.

  • Seidenkrantz, Marit-Solveig; Andersen, Jan R.; Andresen, Katrine Juul; Bendtsen, Jørgen; Brice, Camille; Ellegaard, Marianne; Eriksen, Lasse Nygaard; Gariboldi, Karen; LeDuc, Cynthia; Mathiasen, Anders M.; Nielsen, Tove; Ofstad, Siri; Pearce, Christof; Rasmussen, Tine Lander; Ribeiro, Sofia; Rysgaard, Søren; Røy, Hans; Scholze, Caroline; Schultz, Mads; Wangner, David. NorthGreen2017 – a marine research expedition to NE Greenland onboard ‘R/V Dana’. Cruise Report. 2018.

  • Ofstad, Siri; Zamelczyk, Kasia; Chierici, Melissa; Fransson, Agneta; Rasmussen, Tine Lander. Ocean Acidification in the Fram Strait-Barents Sea Region – Effects on Modern Planktic Foraminifera. Ecosystem Studies of Sub-Arctic and Arctic Seas - ESSAS 2017-06-11 - 2017-06-15 2017.

  • Ofstad, Siri; Zamelczyk, Kasia; Chierici, Melissa; Fransson, Agneta; Serov, Pavel; Rasmussen, Tine Lander. Methane-induced Ocean Acidification in the Northern Barents Sea. Arctic Change 2017 2017-12-11 - 2017-12-15 2017.

  • Rasmussen, Tine Lander; Ezat, Mohamed; Melaniuk, Katarzyna; Ofstad, Siri; Schneider, Andrea; Sen, Arunima; Åström, Emmelie. Cruise Report GEO-3111 (Reconstructing Quaternary Marine Climate and Environments) and GEO-3122 (Micropaleontology) on RV Helmer Hanssen November 2-5, 2017. 2017.

  • Rasmussen, Tine Lander; Sztybor, Kamila; Meilland, Julie; Ofstad, Siri; Ezat, Mohamed; Baker, May. CAGE-OA February Cruise to the western Svalbard margin and the western Barents Sea slope on R/V Helmer Hanssen, February 8th – February 15th, 2016. 2016.

  • Ofstad, Siri. Anthropogenic Carbon Dioxide and Methane Induced Ocean Acidification in the Arctic Ocean, effects on modern planktonic foraminifera. AMGG research school meeting 2016-04-11 - 2016-04-12 2016.

  • Rasmussen, Tine Lander; Nielsen, Tove; Laier, Troels; Ezat, Mohamed M.; Meilland, Julie; Ofstad, Siri; Nystedt, Elina; Pecori, Evelyn. CAGE-PWC April Cruise to the Western Svalbard Margin on R/V Helmer Hanssen, April 22nd – May 1st, 2016. 2016.

  • Rydningen, Tom Arne; Rasmussen, Tine Lander; Meilland, Julie; Ofstad, Siri; Osti, Giacomo; Schneider, Andrea; Schreck, Michael. CRUISE REPORT: Educational cruises to Rebbenesdjupet, Hamrefjorden, Råsa, Helgøyfjorden, Malangen and Målselvfjorden. GEO-3111 Reconstructing Marine Climate and Environments GEO-3121 Marine Geology and GEO-3122 Micropaleontology on R/V Helmer Hanssen, October 8th-10th and 13th-15th, 2016. 2016.

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