• Bruk og misbruk av klimaframskrivninger 

      Sorteberg, Asgeir (Journal article, 2009)
      Forskere er avhengig av pålitelige klimaframskrivninger for å kunne si hvilke konsekvenser klimaforandringer får for mennesker og samfunn i framtiden. Men hva kan klimaframskrivninger brukes til og hvordan bør de brukes?
    • Climate in Svalbard 2100 

      Adakudlu, Muralidhar; Andresen, J; Bakke, Jostein; Beldring, S.; Benestad, Rasmus; Bilt, Willem van der; Bogen, J.; Borstad, Christopher Paul; Breili, Kristian; Breivik, Øyvind; Børsheim, Knut Yngve; Christiansen, Hanne H; Dobler, Andreas; Engeset, Rune; Frauenfelder, Regula; Gerland, Sebastian; Gjelten, Herdis Motrøen; Gundersen, Jeanette; Isaksen, Ketil; Jaedicke, Christian; Kierulf, Halfdan; Kohler, Jack; Li, H.; Lutz, J.; Melvold, Kjetil; Mezghani, Abdelkader; Nilsen, F.; Nilsen, Irene Brox; Nilsen, Jan Even Øie; Pavlova, O.; Ravndal, Ole; Risebrobakken, Bjørg; Saloranta, Tuomo; Sandven, Stein; Schuler, Thomas; Simpson, Matthew James Ross; Skogen, Morten D.; Smedsrud, Lars H.; Sund, Monica; Vikhamar-Schuler, D.; Westermann, Sebastian; Wong, Wai Kwok (Research report, 2019-01)
      This report was commissioned by the Norwegian Environment Agency in order to provide basic information for use in climate change adaptation in Svalbard. It includes descriptions of historical, as well as projections for ...
    • Description and evaluation of the Bergen climate model: ARPEGE coupled with MICOM 

      Furevik, Tore; Bentsen, Mats; Drange, Helge; Kindem, I. K. T.; Kvamstø, Nils Gunnar; Sorteberg, Asgeir (Peer reviewed; Journal article, 2003-07)
      A new coupled atmosphere–ocean–sea ice model has been developed, named the Bergen Climate Model (BCM). It consists of the atmospheric model ARPEGE/IFS, together with a global version of the ocean model MICOM including a ...
    • A diagnosis of warm-core and cold-core extratropical cyclone development using the Zwack–Okossi equation 

      Azad, Roohollah; Sorteberg, Asgeir (Peer reviewed; Journal article, 2009)
      In this study, the development of a warm-core and cold-core extratropical cyclone over North Atlantic is examined. The geostrophic relative vorticity tendency used to diagnose the development is calculated utilizing the ...
    • The dynamic and thermodynamic structure of monsoon low-pressure systems during extreme rainfall events 

      Sørland, Silje Lund; Sorteberg, Asgeir (Peer reviewed; Journal article, 2015-08-12)
      A cyclone-tracking algorithm is used to identify monsoon low-pressure systems (LPS) in the ERA-interim re-analysis (1979–2010). The LPS that are connected to observed extreme rainfall events are picked out and studied with ...
    • A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. I. Model description and sensitivity analysis 

      Lunde, Torleif Markussen; Korecha, Diriba; Loha Shumbullo, Eskindir; Sorteberg, Asgeir; Lindtjørn, Bernt (Peer reviewed; Journal article, 2013-01-23)
      Background: Most of the current biophysical models designed to address the large-scale distribution of malaria assume that transmission of the disease is independent of the vector involved. Another common assumption in ...
    • A dynamic model of some malaria-transmitting anopheline mosquitoes of the Afrotropical region. II. Validation of species distribution and seasonal variations 

      Lunde, Torleif Markussen; Balkew, Meshesha; Korecha, Diriba; Gebre-Michael, Teshome; Ulesido, Fekadu Massebo; Sorteberg, Asgeir; Lindtjørn, Bernt (Peer reviewed; Journal article, 2013-02-25)
      Background: The first part of this study aimed to develop a model for Anopheles gambiae s.l. with separate parametrization schemes for Anopheles gambiae s.s. and Anopheles arabiensis. The characterizations were constructed ...
    • Dynamical downscaling of ERA-40 in complex terrain using the WRF regional climate model 

      Heikkilä, Ulla Elina; Sandvik, Anne Dagrun; Sorteberg, Asgeir (Peer reviewed; Journal article, 2010)
      Results from a first-time employment of the WRF regional climate model to climatological simulations in Europe are presented. The ERA-40 reanalysis (resolution 1 ) has been downscaled to a horizontal resolution of 30 and ...
    • The effect of moisture transport variability on Ethiopian summer precipitation 

      Viste, Ellen Marie; Sorteberg, Asgeir (Peer reviewed; Journal article, 2013-12)
      The main rainy season in Ethiopia occurs during the northern hemisphere summer, when air masses carrying moisture from the Indian Ocean, the Gulf of Guinea, the African continent, the Red Sea, and the Mediterranean Sea, ...
    • Effects of simulated natural variability on Arctic temperature 

      Sorteberg, Asgeir; Furevik, Tore; Drange, Helge; Kvamstø, Nils Gunnar (Journal article, 2005-09-23)
      A five-member ensemble with a coupled atmospheresea ice-ocean model is used to examine the effects of natural variability on climate projections for the Arctic. The individual ensemble members are initialized from a 300 ...
    • Factors affecting extreme rainfall events in the South Pacific 

      Pariyar, Sunil Kumar; Keenlyside, Noel; Sorteberg, Asgeir; Spengler, Thomas; Bhatt, Bhuwan Chandra; Ogawa, Fumiaki (Journal article; Peer reviewed, 2020)
      Extreme rainfall events in the South Pacific are widespread and affected by various factors on different time scales. We use daily rainfall data from 20 stations over the South Pacific to investigate the characteristics ...
    • Impacts of climate change on Blue Nile flows using bias-corrected GCM scenarios 

      Elshamy, Mohamed; Seierstad, Ivar Ambjørn; Sorteberg, Asgeir (Peer reviewed; Journal article, 2009)
      This study analyses the output of 17 general circulation models (GCMs) included in the 4th IPCC assessment report. Downscaled precipitation and potential (reference crop) evapotranspiration (PET) scenarios for the 2081– ...
    • Large‐scale regional model biases in the extra‐tropical North Atlantic storm track and impacts on downstream precipitation 

      Pontoppidan, Marie Louise Nielsen; Kolstad, Erik Wilhelm; Sobolowski, Stefan Pieter; Sorteberg, Asgeir; Changhai, Liu; Rasmussen, Roy (Peer reviewed; Journal article, 2019)
      Global climate models have circulation biases that the community aims to reduce, for instance through high‐resolution dynamical downscaling. We used the Weather Research and Forecasting model (WRF) to downscale both ...
    • Modelled mass balance of Xibu glacier, Tibetan Plateau: sensitivity to climate change 

      Caidong, Caidong; Sorteberg, Asgeir (Journal of Glaciology, Journal article, 2010-06-01)
      Due to a lack of in situ measurements, model-based studies of glacier mass balance in the Tibetan Plateau are very limited. An energy-balance model is applied to analyse the mass-balance sensitivity of Xibu glacier, in the ...
    • Moisture transport into the Ethiopian highlands 

      Viste, Ellen Marie; Sorteberg, Asgeir (Journal article, 2013-01)
      The Ethiopian summer rains occur as air masses of various origins converge above the Ethiopian plateau. In this study, the relative importance of different moisture transport branches has been estimated using the Lagrangian ...
    • Recent and future changes of the Arctic sea-ice cover 

      Smedsrud, Lars Henrik; Sorteberg, Asgeir; Kloster, Kjell (Peer reviewed; Journal article, 2008)
      The present and future state of the Arctic sea ice cover is explored using new observations and a coupled one dimensional air–sea–ice model. Updated satellite observations of Fram Strait ice-area export show an increase ...
    • Recent drought and precipitation tendencies in Ethiopia 

      Viste, Ellen Marie; Korecha, Diriba; Sorteberg, Asgeir (Peer reviewed; Journal article, 2013-05)
      In 2011, drought in the Horn of Africa again made news headlines. This study aims to quantify the meteorological component of this and other drought episodes in Ethiopia since 1971. A monthly precipitation data set for 14 ...
    • Recent wind driven high sea ice area export in the Fram Strait contributes to Arctic sea ice decline 

      Smedsrud, Lars Henrik; Sirevaag, Anders; Kloster, Kjell; Sorteberg, Asgeir; Sandven, Stein (Peer reviewed; Journal article, 2011-10-14)
      Arctic sea ice area has been decreasing for the past two decades. Apart from melting, the southward drift through Fram Strait is the main ice loss mechanism. We present high resolution sea ice drift data across 79° N from ...
    • Snowfall in the Himalayas: An uncertain future from a little-known past 

      Viste, Ellen; Sorteberg, Asgeir (Peer reviewed; Journal article, 2015-06-03)
      Snow and ice provide large amounts of meltwater to the Indus, Ganges and Brahmaputra rivers. This study combines present-day observations and reanalysis data with climate model projections to estimate the amount of snow ...
    • Strengthening malaria and climate research in Ethiopia 

      Lindtjørn, Bernt; Loha, Eskindir; Deressa, Wakgari; Balkew, Meshesha; Gebremichael, Teshome; Sorteberg, Asgeir; Woyessa, Adugna; Animut, Abebe; Diriba, Korecha; Massebo, Fekadu; Viste, Ellen; Lunde, Torleif Markussen; Tesfahun, Dereje (Conference object; Peer reviewed, 2014-09-22)