Blar i Bergen Open Research Archive på forfatter "Bakke, Jostein"
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Palaeoclimatic and regional implications of Older Dryas and Younger Dryas local glacier activity in the low-Arctic valley Finnkongdalen, Andøya, northern Norway
Jansen, Henrik Løseth; Dahl, Svein Olaf; Linge, Henriette; Bakke, Jostein; Nielsen, Pål Ringkjøb; Kvisvik, Bjørn Christian (Journal article; Peer reviewed, 2023)Continuous glacier margin and equilibrium-line altitude fluctuations of a former glacier on central Andøya, northern Norway, are reconstructed during the Lateglacial based on moraines and AMS 14C-dated sediments from the ... -
Pervasive cold ice within a temperate glacier – implications for glacier thermal regimes, sediment transport and foreland geomorphology.
Reinardy, Benedict T.I.; Booth, Adam D; Hughes, Anna L.C.; Boston, Clare M.; Åkesson, Henning; Bakke, Jostein; Nesje, Atle; Giesen, Rianne H.; Pearce, Danni (Peer reviewed; Journal article, 2019-03-07)This study suggests that cold-ice processes may be more widespread than previously assumed, even within temperate glacial systems. We present the first systematic mapping of cold ice at the snout of the temperate glacier ... -
Postglacial species arrival and diversity buildup of northern ecosystems took millennia
Alsos, Inger Greve; Rijal, Dilli Prasad; Ehrich, Dorothee; Karger, Dirk Nikolaus; Yoccoz, Nigel; Heintzman, Peter D.; Brown, Antony; Lammers, Youri; Pellissier, Loïc; Alm, Torbjørn; Bråthen, Kari Anne; Coissac, Eric; Merkel, Marie Føreid; Alberti, Adriana; Denoeud, France; Bakke, Jostein (Journal article; Peer reviewed, 2022)What drives ecosystem buildup, diversity, and stability? We assess species arrival and ecosystem changes across 16 millennia by combining regional-scale plant sedimentary ancient DNA from Fennoscandia with near-complete ... -
Reconstruction of former glacier equilibrium-line altitudes based on proglacial sites: an evaluation of approaches and selection of sites
Dahl, Svein Olaf; Bakke, Jostein; Lie, Øyvind; Nesje, Atle (Quaternary Science Reviews; 22(2/4), Journal article, 2003)Various approaches are used to record variations in glacier activity and equilibrium-line altitudes (ELAs) based on proglacial sites (lacustrine and terrestrial). These approaches are based on a conceptual model of ... -
Reconstruction of glacier variability from lake sediments reveals dynamic Holocene climate in Svalbard
Bilt, Willem van der; Bakke, Jostein; Vasskog, Kristian; D`Andrea, William; Bradley, Raymond S.; Ólafsdóttir, Sædis (Peer reviewed; Journal article, 2015-09-12)The Arctic is warming faster than anywhere else on Earth. Holocene proxy time-series are increasingly used to put this amplified response in perspective by understanding Arctic climate processes beyond the instrumental ... -
Sedimentary ancient DNA reveals local vegetation changes driven by glacial activity and climate
Elliott, Lucas Dane; Rijal, Dilli Prasad; Brown, Antony; Bakke, Jostein; Topstad, Lasse; Heintzman, Peter D.; Alsos, Inger Greve (Journal article; Peer reviewed, 2023)Disentangling the effects of glaciers and climate on vegetation is complicated by the confounding role that climate plays in both systems. We reconstructed changes in vegetation occurring over the Holocene at Jøkelvatnet, ... -
Sedimentary ancient DNA shows terrestrial plant richness continuously increased over the Holocene in northern Fennoscandia
Rijal, Dilli Prasad; Heintzman, Peter D.; Lammers, Youri; Yoccoz, Nigel; Lorberau, Kelsey; Pitelkova, Iva; Goslar, Tomasz; Murguzur, Francisco Javier Ancin; Salonen, J. Sakari; Helmens, Karin F.; Bakke, Jostein; Edwards, Mary E.; Alm, Torbjørn; Bråthen, Kari Anne; Brown, Antony; Alsos, Inger Greve (Journal article; Peer reviewed, 2021)The effects of climate change on species richness are debated but can be informed by the past. Here, we generated a sedimentary ancient DNA dataset covering 10 lakes and applied novel methods for data harmonization. We ... -
Stable Southern Hemisphere westerly winds throughout the Holocene until intensification in the last two millennia
van der Bilt, Willem Godert Maria; D’Andrea, William J.; Oppedal, Lea Toska; Bakke, Jostein; Bjune, Anne Elisabeth; Zwier, Maaike (Journal article; Peer reviewed, 2022)The Southern Hemisphere westerly winds sustain the Southern Ocean’s role as one of Earth’s main carbon sinks, and have helped sequester nearly half the anthropogenic CO2 stored in the ocean. Observations show shifts in the ...