Browsing Institutt for geofag by Author "Tallaksen, Lena M."

Now showing items 1-20 of 22

  • A Climatology of Rain-on-Snow Events for Norway 
    Pall, Pardeep; Tallaksen, Lena M.; Stordal, Frode (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Rain-on-snow (ROS) events are multivariate hydrometeorological phenomena that require a combination of rain and snowpack, with complex processes occurring on and within the snowpack. Impacts include floods and landslides, ...
  • A data-driven model for Fennoscandian wildfire danger 
    Bakke, Sigrid Jørgensen; Wanders, Niko; Van Der Wiel, Karin; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Wildfires are recurrent natural hazards that affect terrestrial ecosystems, the carbon cycle, climate and society. They are typically hard to predict, as their exact location and occurrence are driven by a variety of ...
  • Beyond binary baseflow separation: a delayed-flow index for multiple streamflow contributions 
    Stoelzle, Michael; Schuetz, Tobias; Weiler, Markus; Stahl, Kerstin; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract. Understanding components of the total streamflow is important to assess the ecological functioning of rivers. Binary or two-component separation of streamflow into a quick and a slow (often referred to as baseflow) ...
  • Challenges in modeling and predicting floods and droughts: A review 
    Brunner, Manuela I; Slater, Louise; Tallaksen, Lena M.; Clark, Martyn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Predictions of floods, droughts, and fast drought-flood transitions are required at different time scales to develop management strategies targeted at minimizing negative societal and economic impacts. Forecasts at daily ...
  • Climate–ecosystem modelling made easy: The Land Sites Platform 
    Keetz, Lasse Torben; Lieungh, Eva; Karimi-Asli, Kaveh; Geange, Sonya Rita; Gelati, Emiliano; Tang, Hui; Yilmaz, Yeliz A.; Aas, Kjetil Schanke; Althuizen, Inge; Bryn, Anders; Falk, Stefanie; Fisher, Rosie; Fouilloux, Anne; Horvath, Peter; Indrehus, Sunniva; Lee, Hanna; Lombardozzi, Danica; Parmentier, Frans-Jan W.; Pirk, Norbert; Vandvik, Vigdis; Vollsnes, Ane Victoria; Skarpaas, Olav; Stordal, Frode; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Dynamic Global Vegetation Models (DGVMs) provide a state-of-the-art process-based approach to study the complex interplay between vegetation and its physical environment. For example, they help to predict how terrestrial ...
  • Drought Characteristics Derived Based on the Standardized Streamflow Index: A Large Sample Comparison for Parametric and Nonparametric Methods 
    Tijdeman, E.; Stahl, K; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The streamflow drought hazard can be characterized in a variety of ways, including using different indices. Traditionally, percentile‐based indices, such as Q95 (the flow exceeded 95% of time), have been used by the ...
  • Effects of shrub cover increase on the near surface atmosphere in northern Fennoscand 
    Rydsaa, Johanne Hope; Stordal, Frode; Bryn, Anders; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Shrub expansion in high latitudes is a widely observed response to climate change. Extensive evidence has shown that shrub expansion can lead to positive feedbacks to the regional climate. In this study we evaluate the ...
  • The European 2015 drought from a hydrological perspective 
    Laaha, Gregor; Gauster, Tobias; Tallaksen, Lena M.; Vidal, Jean-Philippe; Stahl, Kerstin; Prudhomme, Christel; Heudorfer, Benedikt; Vlnas, Radek; Ionita, Monica; van Lanen, Henny, A.J.; Adler, Mary-Jeanne; Caillouet, Laurie; Delus, Clair; Fendekova, Miriam; Gailliez, Sébastien; Hannaford, Jamie; Kingston, Daniel; Van Loon, Anne F.; Mediero, Luis; Osuch, Marzena; Romanowicz, Renata; Sauquet, Eric; Stagge, James Howard; Wong, Wai Kim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    In 2015 large parts of Europe were affected by drought. In this paper, we analyze the hydrological footprint (dynamic development over space and time) of the drought of 2015 in terms of both severity (magnitude) and spatial ...
  • Evaluation of global forcing datasets for hydropower inflow simulation in Nepal 
    Bhattarai, Bikas Chandra; Burkhart, John; Tallaksen, Lena M.; Xu, Chong-Yu; Matt, Felix Nikolaus (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract Discharge over the Narayani river catchment of Nepal was simulated using Statkraft's Hydrologic Forecasting Toolbox (Shyft) forced with observations and three global forcing datasets: (i) ERA-Interim ...
  • Hydrology needed to manage droughts: the 2015 European case 
    van Lanen, Henny, A.J.; Laaha, Gregor; Kingston, Daniel; Gauster, Tobias; Ionita, Monica; Vidal, Jean-Philippe; Vlnas, Radek; Tallaksen, Lena M.; Stahl, Kerstin; Hannaford, Jamie; Delus, Claire; Fendekova, Miriam; Mediero, Luis; Prudhomme, Christel; Rets, Ekaterina; Romanowicz, Renata J.; Gailliez, Sébastien; Wong, Wai Kwok; Adler, Mary-Jeanne; Blauhut, Veit; Caillouet, Laurie; Chelcea, Silvia; Frolova, Natalia; Gudmundsson, Lukas; Hanel, Martin; Haslinger, Klaus; Kireeva, Maria; Osuch, Marzena; Sauquet, Eric; Stagge, James Howard; Van Loon, Anne F. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    It is generally accepted that drought is one of the most costly weather‐related natural hazards. In 2015, a long‐lasting drought hit Europe, particularly affecting central and eastern Europe. In some regions it was the ...
  • Improving the representation of high-latitude vegetation distribution in dynamic global vegetation models 
    Horvath, Peter; Tang, Hui; Halvorsen, Rune; Stordal, Frode; Tallaksen, Lena M.; Berntsen, Terje Koren; Bryn, Anders (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Vegetation is an important component in global ecosystems, affecting the physical, hydrological and biogeochemical properties of the land surface. Accordingly, the way vegetation is parameterized strongly influences ...
  • Lessons from the 2018-2019 European droughts: a collective need for unifying drought risk management 
    Blauhut, Veit; Stoelzle, Michael; Ahopelto, Lauri; Brunner, Manuela I.; Teutschbein, Claudia; Wendt, Doris E.; Akstinas, Vytautas; Bakke, Sigrid Jørgensen; Barker, Lucy J.; Bartošová, Lenka; Briede, Agrita; Cammalleri, Carmelo; Kalin, Ksenija Cindrić; De Stefano, Lucia; Fendeková, Miriam; Finger, David C.; Huysmans, Marijke; Ivanov, Mirjana; Jaagus, Jaak; Jakubínský, JiÅ™í; Krakovska, Svitlana; Laaha, Gregor; Lakatos, Monika; Manevski, Kiril; Neumann Andersen, Mathias; Nikolova, Nina; Osuch, Marzena; Van Oel, Pieter; Radeva, Kalina; Romanowicz, Renata J.; Toth, Elena; Trnka, Mirek; Urošev, Marko; Urquijo Reguera, Julia; Sauquet, Eric; Stevkov, Aleksandra; Tallaksen, Lena M.; Trofimova, Iryna; Van Loon, Anne F.; Van Vliet, Michelle T. H.; Vidal, Jean-Philippe; Wanders, Niko; Werner, Micha; Willems, Patrick; Zivković, Nenad (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract. Drought events and their impacts vary spatially and temporally due to diverse pedo-climatic and hydrologic conditions, as well as variations in exposure and vulnerability, such as demographics and response actions. ...
  • Merits of novel high-resolution estimates and existing long-term estimates of humidity and incident radiation in a complex domain 
    Erlandsen, Helene B.; Tallaksen, Lena M.; Kristiansen, Jørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Abstract. To provide better and more robust estimates of evaporation and snowmelt in a changing climate, hydrological and ecological modeling practices are shifting towards solving the surface energy balance. In addition ...
  • Nordic hydrological frontier in the 21st century 
    Marttila, Hannu; Laudon, Hjalmar; Tallaksen, Lena M.; Jaramillo, Fernando; Alfredsen, Knut; Ronkanen, Anna-Kaisa; Kronvang, B.; Lotsari, Eliisa; Kämäri, M; Ala-Aho, Pertti; Nousu, J; Silander, J; Koivusalu, H; Kløve, Bjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract The 21st century has brought new challenges and opportunities and has also increased demands on the Nordic hydrological community. Our hydrological science focus and approaches need rethinking and ...
  • Observed drought indices show increasing divergence across Europe 
    Stagge, James Howard; Kingston, Daniel G.; Tallaksen, Lena M.; Hannah, David M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Recent severe European droughts raise the vital question: are we already experiencing measurable changes in drought likelihood that agree with climate change projections? The plethora of drought definitions compounds this ...
  • Recent European drying and its link to prevailing large-scale atmospheric patterns 
    Bakke, Sigrid Jørgensen; Ionita, Monica; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract The extreme 2018 and 2022 droughts pose as recent examples of a series of drought events that have hit Europe over the last decades with wide ranging social, environmental and economic impacts. Although the link ...
  • Sensitivity of the regional European boreal climate to changes in surface properties resulting from structural vegetation perturbations 
    Rydsaa, Johanne Hope; Stordal, Frode; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Amplified warming at high latitudes over the past few decades has led to changes in the boreal and Arctic climate system such as structural changes in high-latitude ecosystems and soil moisture properties. These changes ...
  • The sensitivity of the terrestrial surface energy and water balance estimates in the WRF model to lower surface boundary representations: a South Norway case study. 
    Erlandsen, Helene B.; Haddeland, Ingjerd; Tallaksen, Lena M.; Kristiansen, Jørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    A seasonal snow cover, expansive forests, a long coast line, and a mountainous terrain are features of Norway’s geography. Forests, ground snow, and sea surface temperature (SST) vary on time scales relevant for weather ...
  • Snow-vegetation-atmosphere interactions in alpine tundra 
    Pirk, Norbert; Aalstad, Kristoffer; A. Yilmaz, Yeliz; Vatne, Astrid; Popp, Andrea L.; Horvath, Peter; Bryn, Anders; Vollsnes, Ane Victoria; Westermann, Sebastian; Berntsen, Terje Koren; Stordal, Frode; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract. The interannual variability of snow cover in alpine areas is increasing, which may affect the tightly coupled cycles of carbon and water through snow–vegetation–atmosphere interactions across a range of spatio-temporal ...
  • Streamflow forecast sensitivity to air temperature forecast calibration 
    Hegdahl, Trine Jahr; Engeland, Kolbjørn; Steinsland, Ingelin; Tallaksen, Lena M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Abstract. In this study, we used meteorological ensemble forecasts as input to hydrological models to quantify the uncertainty in forecasted streamflow, with a particular focus on the effect of temperature forecast calibration ...