Bergur Einarsson, Eyjólfur Magnússon, M. J. Roberts, Finnur Pálsson, Þorsteinn Þorsteinsson, Tómas Jøhannesson,
ABSTRACT GPS campaigns on glaciers during jökulhlaups show how subglacial floods affect glacier motion and shed light on the dynamics of such floods. Three such campaigns have been carried out on southern and western Vatnajökull, southeast Iceland, over known jökulhlaup paths. Two slowly rising jökulhlaups from Grímsvötn and two rapidly rising jökulhlaups from the western and eastern Skaftá cauldrons were captured in these campaigns, with maximum discharge ranging from 240 to 3300 m 3 s −1 . Glacier ...
Tópico(s): Climate change and permafrost
2016 - Cambridge University Press | Annals of Glaciology
Joaquín M. C. Belart, Étienne Berthier, Eyjólfur Magnússon, Leif S. Anderson, Finnur Pálsson, Þorsteinn Þorsteinsson, I. M. Howat, Guðfinna Ađalgeirsdóttir, Tómas Jøhannesson, Alexander H. Jarosch,
Abstract. Sub-meter resolution, stereoscopic satellite images allow for the generation of accurate and high-resolution digital elevation models (DEMs) over glaciers and ice caps. Here, repeated stereo images of Drangajökull ice cap (NW Iceland) from Pléiades and WorldView2 (WV2) are combined with in situ estimates of snow density and densification of firn and fresh snow to provide the first estimates of the glacier-wide geodetic winter mass balance obtained from satellite imagery. Statistics in snow- ...
Tópico(s): Winter Sports Injuries and Performance
2017 - Copernicus Publications | The cryosphere
Guðfinna Ađalgeirsdóttir, Eyjólfur Magnússon, Finnur Pálsson, Þorsteinn Þorsteinsson, Joaquín M. C. Belart, Tómas Jøhannesson, Hrafnhildur Hannesdóttir, Oddur Sigurðsson, Andri Gunnarsson, Bergur Einarsson, Étienne Berthier, Louise Steffensen Schmidt, Hannes H. Haraldsson, Helgi Björnsson,
The volume of glaciers in Iceland (∼3,400 k m 3 in 2019) corresponds to about 9 mm of potential global sea level rise. In this study, observations from 98.7% of glacier covered areas in Iceland (in 2019) are used to construct a record of mass change of Icelandic glaciers since the end of the 19th century i.e. the end of the Little Ice Age (LIA) in Iceland. Glaciological ( in situ ) mass-balance measurements have been conducted on Vatnajökull, Langjökull, and Hofsjökull since the glaciological years 1991/ ...
Tópico(s): Climate change and permafrost
2020 - Frontiers Media | Frontiers in Earth Science
Daniel H. Shain, Katrín Halldórsdóttir, Finnur Pálsson, Guðfinna Ađalgeirsdóttir, Andri Gunnarsson, Þorsteinn Jónsson, Shirley A. Lang, Hlynur Skagfjörð Pálsson, Sveinbjörn Steinþórssson, Einar Árnason,
Very few animal taxa are known to reside permanently in glacier ice/snow. Here we report the widespread colonization of Icelandic glaciers and ice fields by species of bdelloid Rotifera. Specimens were collected within the accumulation zones of Langjökull and Vatnajökull ice caps, among the largest European ice masses. Rotifers reached densities up to ∼100 individuals per liter-equivalent of glacier ice/snow, and were freeze-tolerant. Phylogenetic analyses indicate that glacier rotifers are polyphyletic, ...
Tópico(s): Marine Biology and Ecology Research
2016 - Elsevier BV | Molecular Phylogenetics and Evolution
Leif S. Anderson, Gwenn E. Flowers, Alexander H. Jarosch, Guðfinna Ađalgeirsdóttir, Áslaug Geirsdóttir, Gifford H. Miller, David J. Harning, Þorsteinn Þorsteinsson, Eyjólfur Magnússon, Finnur Pálsson,
Drangajökull is a maritime ice cap located in northwest (Vestfirðir) Iceland. Drangajökull's evolution is therefore closely linked to atmospheric and ocean variability. In order to better constrain the Holocene climate and glacier history of Vestfirðir we model the past evolution of Drangajökull ice cap. Simulations from 10 ka to present are forced by general circulation model output, ice-core-based temperature reconstructions, and sea-surface temperature reconstructions. Based on these 10-thousand ...
Tópico(s): Climate change and permafrost
2018 - Elsevier BV | Quaternary Science Reviews
Alethea Barbaro, Baldvin Einarsson, Björn Birnir, Sven Sigurðsson, Héðinn Valdimarsson, Ólafur K. Pálsson, Sveinn Sveinbjörnsson, Þorsteinn Sigurðsson,
Abstract Barbaro, A., Einarsson, B., Birnir, B., Sigurðsson, S., Valdimarsson, H., Pálsson, Ó. K., Sveinbjörnsson, S., and Sigurðsson, Þ. 2009. Modelling and simulations of the migration of pelagic fish. – ICES Journal of Marine Science, 66: 826–838. We applied an interacting particle model to the Icelandic capelin stock to reproduce the spawning migration route for three different years, successfully predicting the route for 2008. Using available temperature data and approximated currents, and without ...
Tópico(s): Marine and fisheries research
2009 - Oxford University Press | ICES Journal of Marine Science
Tómas Jøhannesson, Helgi Björnsson, Eyjólfur Magnússon, Sverrir Guðmundsson, Finnur Pálsson, Oddur Sigurðsson, Þorsteinn Þorsteinsson, Étienne Berthier,
Abstract Icelandic glaciers cover ∼11 000 km 2 in area and store ∼3600 km 3 of ice. Starting in 2008 during the International Polar Year, accurate digital elevation models (DEMs) of the glaciers are being produced with airborne lidar. More than 90% of the glaciers have been surveyed in this effort, including Vatnajökull, Hofsjökull, Myrdalsjökull, Drangajökull, Eyjafjallajökull and several smaller glaciers. The publicly available DEMs are useful for glaciological and geological research, including ...
Tópico(s): Geology and Paleoclimatology Research
2013 - Cambridge University Press | Annals of Glaciology
Joaquín M. C. Belart, Eyjólfur Magnússon, Étienne Berthier, Ágúst Þ. Gunnlaugsson, Finnur Pálsson, Guðfinna Ađalgeirsdóttir, Tómas Jøhannesson, Þorsteinn Þorsteinsson, Helgi Björnsson,
To date, most mass balance studies in Iceland have concentrated on the three largest ice caps. This study turns the focus towards smaller Icelandic glaciers, presenting geodetic mass-balance estimates for 14 of them (total area 1010 km 2 in 2017) from 1945 to 2017, in decadal time spans. These glaciers, distributed over the country, are subject to different climatic forcing. The mass balance, derived from airborne and spaceborne stereo imagery and airborne lidar, is correlated with precipitation ...
Tópico(s): Winter Sports Injuries and Performance
2020 - Frontiers Media | Frontiers in Earth Science
Helgi Björnsson, Finnur Pálsson, Sverrir Guðmundsson, Eyjólfur Magnússon, Guðfinna Ađalgeirsdóttir, Tómas Jøhannesson, Étienne Berthier, Oddur Sigurðsson, Þorsteinn Þorsteinsson,
In total, Icelandic ice caps contain ∼3600 km 3 of ice, which if melted would raise sea level by ∼1 cm. Here, we present an overview of mass changes of Icelandic ice masses since the end of the 19th century. They have both gained and lost mass during this period. Changes in ice volume have been estimated both through surface mass balance measurements (performed annually since ∼1990) and differencing of digital elevation models derived from various satellite and airborne observations. While the glaciers ...
Tópico(s): Climate variability and models
2013 - American Geophysical Union | Geophysical Research Letters
Eyjólfur Magnússon, Finnur Pálsson, M. T. Guđmundsson, Þórdís Högnadóttir, Cristian Rossi, Þorsteinn Þorsteinsson, Benedíkt G. Ófeigsson, Erik Sturkell, Tómas Jøhannesson,
Abstract. We present repeated radio-echo sounding (RES, 5 MHz) on a profile grid over the eastern Skaftá cauldron (ESC) in Vatnajökull ice cap, Iceland. The ESC is a ∼ 3 km wide and 50–150 m deep ice cauldron created and maintained by subglacial geothermal activity of ∼ 1 GW. Beneath the cauldron and 200–400 m thick ice, water accumulates in a subglacial lake and is released semi-regularly in jökulhlaups. The RES record consists of annual surveys conducted at the beginning of every summer during the period ...
Tópico(s): Arctic and Antarctic ice dynamics
2021 - Copernicus Publications | The cryosphere
Hilma Hólm, Erna V. Ivarsdottir, Þórhildur Ólafsdóttir, Rósa B. Þórólfsdóttir, Elías Eyþórsson, Kristján Norland, Rósa S. Gísladóttir, G.M. Jonsdottir, Unnur Unnsteinsdóttir, Kristin E. Sveinsdottir, Benedikt A. Jónsson, Margrét B. Andrésdóttir, Davíð O. Arnar, Asgeir Ö. Arnthórsson, Kolbrún Birgisdottir, Kristbjörg Bjarnadóttir, Sólveig Bjarnadóttir, Gyða Björnsdóttir, Guðmundur Einarsson, Berglind Eiríksdottir, Elisabet E Gardarsdottir, Þórarinn Gíslason, Magnús Gottfreðsson, Steinunn Guðmundsdóttir, Jūlı́us Guðmundsson, Kristbjörg Gunnarsdóttir, Anna Helgadóttir, Daði Helgason, Ingibjorg Hinriksdottir, Ragnar Freyr Ingvarsson, Sigga Svala Jonasdottir, Ingileif Jónsdóttir, Tekla Karlsdottir, Anna M. Kristinsdottir, Sigurður Y. Kristinsson, Steinunn Kristjánsdóttir, Þorvarður Jón Löve, Dóra Lúðvíksdóttir, Gísli Másson, Gudmundur L. Norddahl, Thorunn A. Olafsdottir, Ísleifur Ólafsson, Þórunn Rafnar, Hrafnhildur L. Runolfsdottir, Jona Saemundsdottir, Svanur Sigurbjörnsson, Kristin Sigurdardottir, Engilbert Sigurðsson, Martin I. Sigurðsson, Engilbert Sigurðsson, Valgerður Steinthórsdóttir, Garðar Sveinbjörnsson, Emil Aron Thorarensen, Bjarni Thorbjornsson, Brynja Thorsteinsdottir, Vinicius Tragante, Magnús Ö. Úlfarsson, Hreinn Stefánsson, Þorsteinn Gíslason, Már Kristjánsson, Runólfur Pálsson, Patrick Sulem, Unnur Þorsteinsdóttir, Guðmundur Þorgeirsson, Daníel F. Guðbjartsson, Kári Stéfansson,
Persistent symptoms are common after SARS-CoV-2 infection but correlation with objective measures is unclear.We invited all 3098 adults who tested SARS-CoV-2 positive in Iceland before October 2020 to the deCODE Health Study. We compared multiple symptoms and physical measures between 1706 Icelanders with confirmed prior infection (cases) who participated, and 619 contemporary and 13,779 historical controls. Cases participated in the study 5-18 months after infection.Here we report that 41 of 88 ...
Tópico(s): Olfactory and Sensory Function Studies
2023 - Nature Portfolio | Communications Medicine
G.M. Jonsdottir, Haraldur Bríem, Þorsteinn Blöndal, Gestur Pálsson, Þórólfur Guðnason, Sigurður Ólafsson,
Tópico(s): Hydraulic Fracturing and Reservoir Analysis
2006 - The Icelandic Medical Association | Læknablaðið
Matthew L. Druckenmiller, Richard Thoman, Twila Moon, Liss M. Andreassen, Thomas J. Ballinger, Logan T. Berner, G. Bernhard, Uma S. Bhatt, Siiri Bigalke, Jarle W. Bjerke, Jason E. Box, Brian Brettschneider, Mike Brubaker, David Burgess, Amy H. Butler, Hanne H. Christiansen, Bertrand Decharme, Chris Derksen, Dmitry Divine, Caroline Drost Jensen, Alesksandra Elias Chereque, Howard E. Epstein, S. L. Farrell, Robert S. Fausto, Xavier Fettweis, Vitali Fioletov, Caitlyn Florentine, Bruce C. Forbes, Gerald V. Frost, Sebastian Gerland, Jens‐Uwe Grooß, Edward Hanna, Inger Hanssen‐Bauer, Máret J. Heatta, Stefan Hendricks, Iolanda Ialongo, Ketil Isaksen, Jelmer Jeuring, Gensuo Jia, Bjørn Johnsen, Lars Kaleschke, Seong-Joong Kim, Jack Kohler, Zachary M. Labe, Rick Lader, Kaisa Lakkala, Mark J. Lara, Simon H. Lee, Bryant D. Loomis, Bartłomiej Luks, Kari Luojus, M. J. Macander, Rúna Í. Magnússon, Kenneth D. Mankoff, G. L. Manney, Brooke Medley, Walter N. Meier, Paul Montesano, Thomas L. Mote, Lawrence Mudryk, Rolf Müller, C. S. R. Neigh, Kelsey E. Nyland, James E. Overland, Finnur Pálsson, Kristin Poinar, Donald K. Perovich, Alek Petty, Gareth K. Phoenix, Robert Ricker, V. E. Romanovsky, Louis Sass, Johan H. Scheller, Mark C. Serreze, N. I. Shiklomanov, B. E. Smith, Sharon L. Smith, D. A. Streletskiy, Tove Svendby, Marco Tedesco, Laura Thomson, Þorsteinn Þorsteinsson, Xiangshan Tian‐Kunze, Mary-Louise Timmermans, Hans Tømmervik, Christine F. Waigl, Donald A. Walker, John E. Walsh, Muyin Wang, Melinda Webster, Adrian Wehrlé, G. J. Wolken, Bert Wouters, Dedi Yang,
Tópico(s): Geological Studies and Exploration
2024 - American Meteorological Society | Bulletin of the American Meteorological Society
Tim Boyer, J. Blunden, Robert Dunn, Melanie Ades, Robert E. Adler, Susheel Adusumilli, William Agyakwah, Somayeh Ahmadpour, Laura S. Aldeco, Michael A. Alexander, Mihai Alexe, Eric J. Alfaro, Richard P. Allan, Adam Allgood, Lincoln M. Alves, Jorge A. Amador, Dillon J. Amaya, Charles Amory, John C. Anderson, Bianca Ott Andrade, Liss M. Andreassen, Orlane Anneville, Yasuyuki Aono, Anthony Argüez, Dolores Armenteras Pascual, Carlo Arosio, Elizabeth Asher, John Augustine, Grinia Ávalos, César Azorín-Molina, Oscar M. Baez-Villanueva, Rebecca Baiman, Thomas J. Ballinger, Alison F. Banwell, M. Yu. Bardin, Jonathan Barichivich, Sandra Barreira, Rebecca Beadling, Marc Beauchemin, Hylke E. Beck, Emily Becker, B. D. Beckley, Endalkachew Bekele, Nicolas Bellouin, Angela Benedetti, Christine Berne, Logan T. Berner, G. Bernhard, Uma S. Bhatt, Siiri Bigalke, Peter Bissolli, Jarle W. Bjerke, Eric S. Blake, Josh Blannin, Stephen Blenkinsop, Oliver Bochníček, Olivier Bock, Xavier Bodin, Olivier Bonte, Michael G. Bosilovich, Olivier Boucher, Jason E. Box, Deniz Bozkurt, Brian Brettschneider, Francis Bringas, Mike Brubaker, Stefan A. Buehler, Brandon Bukunt, David Burgess, Amy H. Butler, Michael P. Byrne, Blanca Calderón, Suzana J. Camargo, Jayaka Campbell, Diego Campos, Fabrizio Cappucci, Laura Carrea, Brendan R. Carter, Randall S. Cerveny, Ivona Cetinić, D. P. Chambers, Duo Chan, Elise Chandler, Kai‐Lan Chang, Candice S. Charlton, Jack Chen, Lin Chen, Lijing Cheng, Vincent Y. S. Cheng, L. Chisholm, Hanne H. Christiansen, John R. Christy, Eui‐Seok Chung, Laura M. Ciasto, Leonardo A. Clarke, Kyle R. Clem, Scott Clingan, Caio A. S. Coelho, Melanie Coldewey‐Egbers, Steve Colwell, O. R. Cooper, Richard Cornes, Kris Correa, Felipe Costa, Curt Covey, Lawrence Coy, Jean‐François Crétaux, Theresa M. Crimmins, Molly Crotwell, Joshua Culpepper, Ana Paula Martins do Amaral Cunha, Diego Cusicanqui, Rajashree Tri Datta, Sean Davis, Richard de Jeu, Jos de Laat, Pranab Deb, Bertrand Decharme, D. A. Degenstein, Reynald Delaloye, Chris Derksen, Howard J. Diamond, Elizabeth DiGangi, Shiva Dindyal, Dmitry Divine, Martin T. Dokulil, Markus G. Donat, Shenfu Dong, Wouter Dorigo, Caroline Drost Jensen, Matthew L. Druckenmiller, Marcel du Plessis, Diane Duchemin, Hilary A. Dugan, Dashkhuu Dulamsuren, Imke Durre, G. S. Dutton, Grégory Duveiller, Craig Earl‐Spurr, Paola Echeverría Garcés, Mithat Ekici, Alesksandra Elias Chereque, Shane Elipot, M. ElKharrim, Howard E. Epstein, Jhan Carlo Espinoza, T. W. Estilow, Nicole Estrella, S. L. Farrell, Nicolas Fauchereau, Robert S. Fausto, Richard A. Feely, Chris Fenimore, David Fereday, Denise Fernández, Xavier Fettweis, Vitali Fioletov, Johannes Flemming, Caitlyn Florentine, Chris Fogarty, Ryan L. Fogt, Bruce C. Forbes, Michael J. Foster, Bryan A. Franz, Thomas Frederikse, H. A. Fricker, S. M. Frith, L. Froidevaux, Gerald V. Frost, Shanshan Fu, Yao Fu, Martin Füllekrug, Catherine Ganter, Meng Gao, Judith Garforth, Jay Garg, Sebastian Gerland, Artur Gevorgyan, Donata Giglio, Sarah T. Gille, John Gilson, Karin Gleason, Nadine Gobron, Sophie Godin‐Beekmann, Marlos Góes, Stanley B. Goldenberg, Julio Gómez Camacho, Yolanda González Hernández, Steven M. Goodman, Atsushi Goto, Garrett Graham, Alice M. Grimm, Jens‐Uwe Grooß, A. Gruber, Guojun Gu, Mauro Guglielmin, Sebastian Hahn, Leopold Haimberger, S. Hakmi, B. D. Hall, B. D. Hamlington, Edward Hanna, Inger Hanssen‐Bauer, Merritt E. Harlan, Daniel S. Harnos, Ian Harris, Qiong He, Máret J. Heatta, Richard R. Heim, Deborah Hemming, Stefan Hendricks, Jessica Hicks, Hugo G. Hidalgo, Martin Hirschi, Shu‐peng Ho, Will Hobbs, R. H. Holzworth, Radley Horton, Filip Hrbáček, Guojie Hu, Zeng‐Zhen Hu, Boyin Huang, Hongjie Huang, D. F. Hurst, Iolanda Ialongo, Antje Inness, Ketil Isaksen, Masayoshi Ishii, Michael G. Jacox, Gerardo Jadra, Piyush Jain, Annika Jersild, Jelmer Jeuring, Svetlana Jevrejeva, Gensuo Jia, Viju O. John, William E. Johns, Bjørn Johnsen, B. J. Johnson, Gregory C. Johnson, P. D. Jones, Simon A. Josey, Guillaume Jumaux, Robert Junod, Andreas Kääb, K. Kabidi, Johannes W. Kaiser, Lars Kaleschke, Viktor Kaufmann, A. F. Kazemi, Linda M. Keller, Andreas Kellerer‐Pirklbauer, Michael Kendon, John Kennedy, Yelena Khalatyan, V. M. Khan, Sergey Khaykin, Mai Van Khiem, Richard Kidd, Rachel Killick, Seong‐Joong Kim, Tyler King, Zak Kipling, Megan C. Kirchmeier‐Young, Philip J. Klotzbach, John A. Knaff, Jack Kohler, Akash Koppa, Natalia N. Korshunova, Benjamin M. Kraemer, N. A. Kramarova, Jessica Kromer, Andries Kruger, Arun Kumar, Mikael Kuusela, R. Sofia La Fuente, Alo Laas, Zachary M. Labe, Rick Lader, Leslie R. Lait, Mónika Lakatos, Kaisa Lakkala, Hoang Phuc Lam, Xin Lan, Peter Landschützer, Chris Landsea, Kathleen Lantz, Jeff Lapierre, Mark J. Lara, Waldo Lavado‐Casimiro, David A. Lavers, Matthew A. Lazzara, Thierry Leblanc, Simon H. Lee, Tsz-cheung Lee, E. M. Leibensperger,
Abstract —J. Blunden and T. Boyer In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—carbon dioxide, methane, and nitrous oxide—all increased to record-high levels. The annual global average carbon dioxide concentration in the atmosphere rose to 419.3±0.1 ppm, which is 50% greater than the pre-industrial level. The growth from 2022 to 2023 ...
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