J
Jan Friesen
Researcher at Helmholtz Centre for Environmental Research - UFZ
Publications - 60
Citations - 1782
Jan Friesen is an academic researcher from Helmholtz Centre for Environmental Research - UFZ. The author has contributed to research in topics: Interception & Water resources. The author has an hindex of 19, co-authored 57 publications receiving 1443 citations. Previous affiliations of Jan Friesen include Berlin-Brandenburg Academy of Sciences and Humanities & University of Bonn.
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Journal ArticleDOI
Global Soil Moisture Patterns Observed by Space Borne Microwave Radiometers and Scatterometers
de R.A.M. Jeu,Wolfgang Wagner,Thomas R. H. Holmes,A. J. Dolman,van de N.C. Giesen,Jan Friesen +5 more
TL;DR: In this paper, a global evaluation study was performed on two available global soil moisture products, ERS scatterometer surface wetness data was compared to AMSR-E soil moisture data, pointing out a strong similarity between both products in sparse to moderate vegetated regions with an average correlation coefficient of 0.83.
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Hydroclimatology of the Volta River Basin in West Africa: Trends and variability from 1901 to 2002
TL;DR: In this paper, a long-term historical records of rainfall (P), runoff (Q) and other climatic factors were used to investigate hydrological variability and trends in the Volta River Basin over the period 1901-2002.
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The Bode hydrological observatory: a platform for integrated, interdisciplinary hydro-ecological research within the TERENO Harz/Central German Lowland Observatory
Ute Wollschläger,Sabine Attinger,Dietrich Borchardt,Mario Brauns,Matthias Cuntz,Peter Dietrich,Jan H. Fleckenstein,Kurt Friese,Jan Friesen,Alexander Harpke,Anke Hildebrandt,Greta Jäckel,Norbert Kamjunke,Kay Knöller,Simon Kögler,Olaf Kolditz,Ronald Krieg,Rohini Kumar,Angela Lausch,Matthias Liess,Andreas Marx,Ralf Merz,Christin Mueller,Andreas Musolff,Helge Norf,Sascha E. Oswald,Corinna Rebmann,F. Reinstorf,Michael Rode,Karsten Rink,Karsten Rinke,Luis Samaniego,Michael Vieweg,Hans-Jörg Vogel,Markus Weitere,Ulrike Werban,Matthias Zink,Steffen Zacharias +37 more
TL;DR: In this paper, the authors provide an overview of the Bode River catchment, which was selected as the hydrological observatory and main region for hydro-ecological research within the TERrestrial ENvironmental Observatories Harz/Central German Lowland Observatory.
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People, pollution and pathogens – Global change impacts in mountain freshwater ecosystems
Dirk S. Schmeller,Adeline Loyau,Kunshan Bao,Werner Brack,Antonis Chatzinotas,François De Vleeschouwer,Jan Friesen,Laure Gandois,Sophia V. Hansson,Marilen Haver,Gaël Le Roux,Ji Shen,Roman Teisserenc,Vance T. Vredenburg +13 more
TL;DR: This work recommends reconstructing the recent past of anthropogenic impact through sediment analyses, to focus efforts on small, but highly productive waterbodies, and to collect data on the occurrence and variability of microorganisms, biofilms, plankton species and key species, such as amphibians due to their bioindicator value for ecosystem health and water quality.
Journal ArticleDOI
Using Diurnal Variation in Backscatter to Detect Vegetation Water Stress
TL;DR: Results suggest that combining the morning and evening passes of the SMAP radar observations might yield valuable insight into water stress in areas otherwise considered too densely vegetated for traditional soil moisture retrieval.