• Arctic Sea level Budget Assessment During the GRACE/Argo Time Period 

      Raj, Roshin Pappukutty; Andersen, Ole Baltazar; Johannessen, Johnny Andre; Benjamin, Gutknech; Chatterjee, Sourav; Rose, Stine; Bonaduce, Antonio; Horwath, Martin; Ranndal, Heidi; Richter, Kristin; Palanisamy, Hindumathi; Ludwigsen, Carsten; Bertino, Laurent; Nilsen, Jan Even Øie; Knudsen, Per; Hogg, Anna E.; Cazenave, Anny; Benveniste, Jérôme (Journal article; Peer reviewed, 2020)
      Sea level change is an important indicator of climate change. Our study focuses on the sea level budget assessment of the Arctic Ocean using: (1) the newly reprocessed satellite altimeter data with major changes in the ...
    • Assessing the Potential Replacement of Laurel Forest by a Novel Ecosystem in the Steep Terrain of an Oceanic Island 

      Sharan Devkota, Ram; Field, Richard; Vetaas, Ole Reidar; Beierkuhnlein, Carl; Hoffmann, Samuel; Walentowitz, Anna; Jentsch, Anke; Medina, Felix; Weiser, Frank; Chiarukki, Allessandro (Journal article; Peer reviewed, 2020)
      Biological invasions are a major global threat to biodiversity and often affect ecosystem services negatively. They are particularly problematic on oceanic islands where there are many narrow-ranged endemic species, and ...
    • Characterization of turbulence in wind turbine wakes under different stability  conditions from static Doppler LiDAR measurements 

      Kumer, Valerie-Marie; Reuder, Joachim; Eikill, Rannveig (Peer reviewed; Journal article, 2017-03-05)
      Wake characteristics are of great importance for wind park performance and turbine loads. While wind tunnel experiments provided a solid base for the basic understanding of the structure and dynamics of wind turbine wakes, ...
    • The Determination of the Snow Optical Grain Diameter and Snowmelt Area on the Greenland Ice Sheet Using Spaceborne Optical Observations 

      Vandecrux, Baptiste; Box, Jason E.; Wehrlé, Adrien; Kokhanovsky, Alexander A.; Picard, Ghislain; Niwano, Masashi; Hörhold, Maria; Faber, Anne-Katrine; Steen-Larsen, Hans Christian (Journal article; Peer reviewed, 2022)
      The optical diameter of the surface snow grains impacts the amount of energy absorbed by the surface and therefore the onset and magnitude of surface melt. Snow grains respond to surface heating through grain metamorphism ...
    • An Evaluation of the EnKF vs. EnOI and the Assimilation of SMAP, SMOS and ESA CCI Soil Moisture Data over the Contiguous US 

      Blyverket, Jostein; Hamer, Paul David; Bertino, Laurent; Albergel, Clement; Fairbairn, David; Lahoz, William A. (Peer reviewed; Journal article, 2019-02-26)
      A number of studies have shown that assimilation of satellite derived soil moisture using the ensemble Kalman Filter (EnKF) can improve soil moisture estimates, particularly for the surface zone. However, the EnKF is ...
    • Knowledge Gaps and Impact of Future Satellite Missions to Facilitate Monitoring of Changes in the Arctic Ocean 

      Lucas, Sylvain; Johannessen, Johnny Andre; Cancet, Mathilde; Pettersson, Lasse H; Esau, Igor; Rheinlænder, Jonathan Winfield; Ardhuin, Fabrice; Chapron, Bertrand; Korosov, Anton; Collard, Fabrice; Herlédan, Sylvain; Olason, Einar; Ferrari, Ramiro; Fouchet, Ergane; Donlon, Craig (Journal article; Peer reviewed, 2023)
      Polar-orbiting satellite observations are of fundamental importance to explore the main scientific challenges in the Arctic Ocean, as they provide information on bio-geo-physical variables with a denser spatial and temporal ...
    • Leveraging Soil Moisture Assimilation in Permafrost Affected Regions 

      Pradhan, Ankita; Nair, Akhilesh Sivaraman; Indu, J.; Makarieva, Olga; Nesterova, Nataliia (Journal article; Peer reviewed, 2023-03-10)
      The transfer of water and energy fluxes between the ground and the atmosphere is influenced by soil moisture (SM), which is an important factor in land surface dynamics. Accurate representation of SM over permafrost-affected ...
    • Monitoring Soil Moisture Drought over Northern High Latitudes from Space 

      Blyverket, Jostein; Hamer, Paul David; Schneider, Philipp; Albergel, Clement; Lahoz, William A. (Peer reviewed; Journal article, 2019-05-20)
      Mapping drought from space using, e.g., surface soil moisture (SSM), has become viable in the last decade. However, state of the art SSM retrieval products suffer from very poor coverage over northern latitudes. In this ...
    • Multispectral Optical Diagnostics of Lightning from Space 

      Pérez-Invernón, Francisco J.; Gordillo-Vázquez, Francisco J.; Passas-Varo, María; Neubert, Torsten; Chanrion, Olivier; Reglero, Victor; Østgaard, Nikolai (Journal article; Peer reviewed, 2022)
      We present spectroscopic diagnostic methods that allow us to estimate the gas and the electron temperature in emerged lightning stroke channels (from thunderclouds) observed by the photometers and cameras of the Atmosphere ...
    • A Neural Network Method for Retrieving Sea Surface Wind Speed for C-Band SAR 

      Yu, Peng; Xu, Wenxiang; Zhong, Xiaojing; Johannessen, Johnny Andre; Yan, Xiao-Hai; Geng, Xupu; He, Yuanrong; Lu, Wenfang (Journal article; Peer reviewed, 2022-05-08)
      Based on the Ocean Projection and Extension neural Network (OPEN) method, a novel approach is proposed to retrieve sea surface wind speed for C-band synthetic aperture radar (SAR). In order to prove the methodology with a ...
    • Predicting Species and Structural Diversity of Temperate Forests with Satellite Remote Sensing and Deep Learning 

      Hoffmann, Janik; Muro, Javier; Dubovyk, Olena (Journal article; Peer reviewed, 2022)
      Anthropogenically-driven climate change, land-use changes, and related biodiversity losses are threatening the capability of forests to provide a variety of valuable ecosystem services. The magnitude and diversity of these ...
    • Retrieval of snow properties from the Sentinel-3 Ocean and Land Colour Instrument 

      Kokhanovsky, Alexander; Lamare, Maxim; Danne, Olaf; Brockmann, Carsten; Dumont, Marie; Picard, Ghislain; Arnaud, Laurent; Favier, Vincent; Jourdain, Bruno; Le Meur, Emmanuel; Di Mauro, Biagio; Aoki, Teruo; Niwano, Masashi; Rozanov, Vladimir; Korkin, Sergey; Kipfstuhl, Sepp; Freitag, Johannes; Hoerhold, Maria; Zuhr, Alexandra; Vladimirova, Diana; Faber, Anne-Katrine; Steen-Larsen, Hans Christian; Wahl, Sonja; Andersen, Jonas K.; Vandecrux, Baptiste; van As, Dirk; Mankoff, Kenneth D.; Kern, Michael; Zege, Eleonora; Box, Jason E. (Journal article, 2019)
      The Sentinel Application Platform (SNAP) architecture facilitates Earth Observation data processing. In this work, we present results from a new Snow Processor for SNAP. We also describe physical principles behind the ...
    • Satellite and Ground Observations of Snow Cover in Tibet during 2001–2015 

      Basang, Droma; Barthel, Knut; Olseth, Jan Asle (Peer reviewed; Journal article, 2017-11-22)
      The seasonal snow cover of the Tibetan Plateau exerts a profound environmental influence both regionally and globally. Daily observations of snow depth at 37 meteorological stations in Tibet and MODIS eight-day snow products ...
    • Time evolution of storms producing terrestrial gamma-ray flashes using era5 reanalysis data, gps, lightning and geo-stationary satellite observations 

      Tiberia, Alessandra; Mascitelli, Alessandra; D’adderio, Leo Pio; Federico, Stefano; Marisaldi, Martino; Porcù, Federico; Realini, Eugenio; Gatti, Andrea; Ursi, Alessandro; Fuschino, Fabio; Tavani, Marco; Dietrich, Stefano (Journal article; Peer reviewed, 2021)
      In this article, we report the first investigation over time of the atmospheric conditions around terrestrial gamma-ray flash (TGF) occurrences, using GPS sensors in combination with geostationary satellite observations ...