VALLEY, DRY VALLEYS OF ANTARCTICA: ANALOGUE TO GROUND ICE CONDITIONS ON MARS. D. Lacelle, A. Davila, B., Faucher, D. Fisher, A. Jackson, C. Lapalme, W. Pollard, C.P. McKay. Department of Geography, University of Ottawa, Ottawa, Canada ([email protected]), Department of Geography, McGill Univrersity, Montreal, Canada, SETI Institute, Mountain View, USA; Department of Earth Sciences, University...

Agricultural landscapes have received little recognition for the food resources they provide to wintering waterbirds. In the Willamette Valley of Oregon, modest yet significant populations of wintering shorebirds (Charadriiformes) regularly use hundreds of dispersed wetlands on agricultural lands. Benthic invertebrates are a critical resource for the survival of overwintering shorebirds, yet th...

Low-diversity ecosystems cover large portions of the Earth’s land surface, yet studies of climate change on ecosystem functioning typically focus on temperate ecosystems, where diversity is high and the effects of individual species on ecosystem functioning are difficult to determine. We show that a climate-induced decline of an invertebrate species in a low-diversity ecosystem could contribute...

Undoubtedly, the flood is known as a natural disaster. But in practice, considered most terrible disaster terms of mortality and financial losses. In this regard, worrying trend increasing damage world recent decades. The increase population assets floodplain changes hydro systems destructive effects human activities have been major cause trend. chapter, due to importance phenomenon ZayandehRud...

Several debris-covered glaciers occupy tributaries of upper Beacon Valley, Antarctica. Understanding their flow dynamics and ice thickness is important for palaeoclimate studies and for understanding the origins of ancient ice elsewhere in the McMurdo Dry Valleys region. We present the results of several shallow seismic surveys in Mullins Valley, where the largest of these debris-covered glacie...

MAY 2002 AMERICAN METEOROLOGICAL SOCIETY | T he complex topography of the western United States produces a variety of thermally and dynamically driven wind systems. Historically, the knowledge and understanding of these systems has been limited by a number of factors, including a lack of observational data. In the Intermountain West (IW, Fig. 1), the elevated semiarid area between the Cascade–S...

The McMurdo dry valleys of Antarctica represent the largest of the ice-free areas on the Antarctic continent, containing glaciers, meltwater streams, and closed basin lakes. Previous geochemical studies of dry valley streams and lakes have addressed chemical weathering reactions of hyporheic substrate and geochemical evolution of dry valley surface waters. We examine cation transport and exchan...

Life in the Taylor Valley, Antarctica, is dominated by microorganisms, with cyanobacteria being key primary producers in the region. Despite their abundance and ecological importance, the factors controlling biogeography, diversity, dispersal of cyanobacteria in Taylor Valley and other polar environments are poorly understood. Owing to persistent high winds, we hypothesize that the cyanobacteri...

Information is provided about the approach and experience in flood management in the Damodar river basin of India. This is achieved through a scheme for the integrated operation of a number of reservoirs on that river and on its tributaries for the purpose of irrigation, hydropower generation and flood protection. Of particular interest is the recent change in policy towards a multi-disciplinar...