BAHC - Biospheric Aspects of the Hydrological Cycle(français)BAHC has recently been established as a core project within the IGBP. It was designed to determine how plant communities, ecosystems, and topography interact with the hydrologic cycle and the partitioning of energy at land surfaces. The question will be addressed over the full range of spatial and temporal scales, for different types of landscapes and ecosystems, and under existing and changing conditions. The research plan for BAHC has been divided into four research foci, as follows: -Focus 1: to investigate, at the microscale level, the basic vertical exchange processes for energy, moisture and trace gases (e.g. carbon) at the soil-vegetation-atmosphere (SVAT) interface -Focus 2: concerned with the extension of the investigations under Focus 1 into two and three dimensions; it is regionally oriented (mesoscale), and is concerned with the up-scaling or representation of larger areas in models which take into account land surface heterogeneity in all its forms -Focus 3: oriented to spatial scales, ranging from those considered in Focus 2, up to General Circulation Model (GCM) grid cell size and continents, and to longer time scales (1-10 years) -Focus 4: will coordinate the development of a set of algorithms to provide regional and high resolution estimates of climate variables, using large scale information such as assimilated observations or GCM output. SPONSORS: IGBP AFFILIATIONS: GCTE, GEWEX INTERNATIONAL CONTACT: CANADIAN CONTACT:
WEB SITE: http://www.pik-potsdam.de/~bahc/
BAHC - Projet sur les aspects biosphériques du cycle hydrologiqueLe BAHC a été mis sur pied récemment en tant que projet principal du PIGB. Il a été conçu de manière à déterminer comment les groupements végétaux, les écosystèmes et la topographie interviennent dans le cycle hydrologique et dans la répartition de l'énergie en surface du sol. Cette question sera traitée selon la gamme complète d'échelles spatiales et temporelles, pour différents types d'environnements et d'écosystèmes et dans les conditions existantes et changeantes. Le plan de recherche du BAHC a été réparti selon les quatre volets suivants :
Volet 1 : examiner, à méso-échelle, les processus fondamentaux d'échange vertical de l'énergie, de l'humidité et des gaz à l'état de traces (le carbone, par exemple) à l'interface sol-végétation-atmosphère.
PARRAINS : PIGB
WEB SITE: http://www.pik-potsdam.de/~bahc/
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