Lambs, Luc Labiod, Mohamed
Since the 1970s, rainfall has declined along the North African coast, while the demographic pressure has increased. Supplementing the rainfall data and water level of the Béni Bahdel dam, water isotopic signature and tree ring analyses were used to better understand the effects of climate change (lower rainfall, higher summer temperature) and the w...
Matyas, Csaba Vendramin, Giovanni G. Fady, Bruno
Dorigo, Wouter Richter, Rudolf Baret, Frederic Bamler, Richard Wagner, Wolfgang
Automated, image based methods for the retrieval of vegetation biophysical and biochemical variables are often hampered by the lack of a priori knowledge about land cover and phenology, which makes the retrieval a highly underdetermined problem. This study addresses this problem by presenting a novel approach, called CRASh, for the concurrent retri...
Peiffer, Marianne Badeau, Vincent Bréda, Nathalie Ulrich, Erwin
Faisant suite à un premier bilan réalisé sur le sous-réseau météorologique forestier (Ponette et al., 1996), ce nouveau rapport permet l’analyse du réseau après une longue période de fonctionnement de dix années (1995-2004).Ce rapport intègre le réseau météorologique forestier français ainsi que celui du Grand Duché de Luxembourg. Les placettes ont...
Mathuriau, Catherine Thomas, Alain G. B. Chauvet, Eric
The dynamics of benthic detritus and the structure, composition and functional feeding groups of as- sociated macroinvertebrate communities were followed at biweekly intervals over one year in a 4th-order Andean stream located in a forested hill in SW Colombia. The density of macroinvertebrates and the number of taxa showed a similar bimodal annual...
Möhler, Ottmar Georgakopoulos, D.G. Morris, Cindy E. Benz, S. Ebert, V. Hunsmann, S. Saathoff, H. Schnaiter, M. Wagner, R.
The ice nucleation activities of five different Pseudomonas syringae, Pseudomonas viridiflava and Erwinia herbicola bacterial species and of Snomax™ were investigated in the temperature range between −5 and −15°C. Water suspensions of these bacteria were directly sprayed into the cloud chamber of the AIDA facility of Forschungszentrum Karlsruhe at ...
Christner, Brent C. Cai, Rongman Morris, Cindy E. McCarter, Kevin S. Foreman, Christine M. Skidmore, Mark L. Montross, Scott N. Sands, David C.
Biological ice nucleators (IN) function as catalysts for freezing at relatively warm temperatures (warmer than −10 °C). We examined the concentration (per volume of liquid) and nature of IN in precipitation collected from Montana and Louisiana, the Alps and Pyrenees (France), Ross Island (Antarctica), and Yukon (Canada). The temperature of detectab...
Lagouarde, Jean-Pierre Irvine, Mark Rankin
The measurements of surface temperature are prone to important directional anisotropy related to the structure of the canopy and the radiative and energy exchanges inside of it. Directional effects must be taken into account for a number of practical applications such as the correction of large swath satellite data, the assimilation of thermal infr...
Deguillaume, Laurent Leriche, M. Amato, P. Ariya, P.A. Delort, A.M. Pöschl, U. Chaumerliac, N. Bauer, H. Flossmann, A.I. Morris, Cindy E.
...
This paper discusses the influence of primary biological aerosols (PBA) on atmospheric chemistry and vice versa through microbiological and chemical properties and processes. Several studies have shown that PBA represent a significant fraction of air particulate matter and hence affect the microstructure and water uptake of aerosol particles. Moreo...
Gonzalez, Maya Ladet, Sylvie Deconchat, Marc Alard, Didier Balent, Gérard
De nombreux travaux ont souligné l’importance de l’ancienneté des forêts, et des conditions stationnelles (exposition en particulier) sur la répartition des espèces forestières, en particulier en Europe du Nord. Dans un contexte plus méridional et pour les espèces ligneuses uniquement, nous testons la validité des listes d’espèces d’anciennes forêt...