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Full-Text Articles in Physical Sciences and Mathematics
Global Snow Cover Monitoring: An Update, David A. Robinson, Kenneth F. Dewey, Richard R. Heim, Jr.
Global Snow Cover Monitoring: An Update, David A. Robinson, Kenneth F. Dewey, Richard R. Heim, Jr.
United States Department of Commerce: Staff Publications
Accurate monitoring of the large-scale dimensions of global snow cover is essential for understanding details of climate dynamics and climate change. Presently, such information is gathered individually from ground station networks and satellite platforms. Efforts are in progress to consolidate and analyze long-term station records from a number of countries. To gain truly global coverage, however, satellite-based monitoring techniques must be employed. A 27-year record of Northern Hemisphere continental snow cover produced by the National Oceanic and Atmospheric Administration (NOAA) is the longest such environmental record available. Records of Southern Hemisphere continental cover and snow on top of Arctic sea …
Seasonal And Annual Variation In Weight And Biochemical Content Of The Zebra Mussel, Dreissena Polymorpha, In Lake St. Clair, Thomas F. Nalepa, Joann F. Cavaletto, Mark Ford, Wendy M. Gordon, Marijo Wimmer
Seasonal And Annual Variation In Weight And Biochemical Content Of The Zebra Mussel, Dreissena Polymorpha, In Lake St. Clair, Thomas F. Nalepa, Joann F. Cavaletto, Mark Ford, Wendy M. Gordon, Marijo Wimmer
United States Department of Commerce: Staff Publications
Zebra mussels, Dreissena polymorpha, were collected monthly from April/May to November in 1990 and 1991 from two sites in Lake St. Clair. The sites were characterized by relatively high and low mussel densities. The following variables were measured: ash-free dry weight (AFDW) per unit shell length (SL), lipid content and classes, carbon content, and nitrogen content. Mussels from the high-density site had a lower AFDW:SL relationship, lower lipid content, and a lower C:N ratio than mussels from the low-density site. Seasonal trends in these variables were consistent between sites and years. AFDW:SL, lipid, and carbon content were highest in …