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Greenbelt - Oct 08, 2003 ![]() IceSat's Lasers Measure Ice, Clouds And Land Elevations ![]() NASA's Ice, Cloud and land Elevation Satellite (ICESat) has resumed measurements of the Earth's polar ice sheets, clouds, mountains and forests with the second of its three lasers. Crisscrossing the globe at nearly 17,000 miles per hour, this new space mission is providing data with unprecedented accuracy on the critical third dimension of the Earth, its vertical characteristics. |
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Solar Contribution To Global Warming Predicted To Decrease![]() New research on the sun's contribution to global warming is reported in this month's Astronomy & Geophysics. By looking at solar activity over the last 11,000 years, British Antarctic Survey (BAS) astrophysicist, Mark Clilverd, predicts that the sun's contribution to warming the Earth will reduce slightly over the next 100 years. Scientists Use Satellite To "Pond-Er" Melted Arctic Ice ![]() NASA researchers and other scientists used a satellite combined with aircraft video to create a new technique for detecting ponds of water on top of Arctic sea ice. Until now, it was not possible to accurately monitor these ponds on ice from space. Huge Antarctic Iceberg Makes A Big Splash On Sea Life ![]() NASA satellites have observed the calving, or breaking off, of one of the largest icebergs ever recorded. Named "C-19" - the iceberg separated from the western face of the Ross Ice Shelf in Antarctica in May 2002, splashed into the Ross Sea, and virtually eliminated a valuable food source for marine life. Geneticist Spells Out Consequences of Genetically Engineered Genes Escaping Riverside - Oct ![]() Domesticated plants are the descendants of wild plants and the two are therefore closely related. What would be the consequences of sex between cultivated plants and their wild relatives? Would they perhaps make strange bedfellows? Can Only Drugs Save The Rainforests ![]() Misty-eyed idealism alone will not save Earth's dwindling tropical rainforests. But a five-year, $3 million study in Panama indicates rainforests can be protected if the pharmaceutical industry establishes Third World laboratories and hires local researchers to look for new medicines extracted from plants that evolved defenses against insects. Early Arctic Thaw May And The Carbon Balance ![]() Spring will be coming early next year to the great forests and tundra of the Arctic. Good for the vegetation, but perhaps not so good for the atmosphere. Spring in the high latitudes has been coming earlier in the past few decades. The early thaw means a longer growing season for the Arctic and the boreal forest, the ring of mostly evergreen trees that stretches across the northern reaches of North America and Eurasia. It also means that more carbon, now stored in the region's usually frozen soils, may be released into the air. NASA Selects Two Magnetospheric Mission Proposals For Feasibility Studies ![]() In the first step of a two-step process, NASA has selected two teams to conduct concept studies for the Magnetospheric Multiscale (MMS) Mission, the fourth investigation in NASA's Solar Terrestrial Probe mission line. |
Ecosystem Changes In Polar Regions Linked To Solar Variability![]() A Lawrence Livermore National Laboratory scientist, in collaboration with an international team of colleagues, has reported that noticeable changes in the sub-polar climate and ecosystems appear to be linked to variations in the sun's intensity during the past 12,000 years. Paleontologist Offers New Theory On Dinosaur Extinction ![]() As a paleontologist, Gerta Keller has studied many aspects of the history of life on Earth. But the question capturing her attention lately is one so basic it has passed the lips of generations of 6-year-olds: What killed the dinosaurs? Ozone Hole Peak Approaches, But Falls Short Of Record ![]() This year's Antarctic ozone hole is the second largest ever observed, according to scientists from NASA, the National Oceanic and Atmospheric Administration (NOAA), and the Naval Research Laboratory. Northern Climate, Ecosystems Driven By Cycles Of Changing Sunlight ![]() Emerging geochemical and biological evidence from Alaskan lake sediment suggests that slight variations in the sun's intensity have affected sub-polar climate and ecosystems in a predictable fashion during the last 12,000 years. Largest Arctic Ice Shelf Breaks Up, Draining Freshwater Lake ![]() The largest ice shelf in the Arctic has broken, and scientists who have studied it closely say it is evidence of ongoing and accelerated climate change in the north polar region. The Ward Hunt Ice Shelf is located on the north coast of Ellesmere Island in Canada's Nunavut territory and its northernmost national park. This ancient feature of thick ice floating on the sea began forming some 4,500 years ago and has been in place for at least 3,000 years. Opening A File Card On All Lifeforms ![]() The National Science Foundation (NSF), in cooperation with the ALL Species Foundation, has announced an important new strategy to discover, describe and classify Earth's species. By some estimates as many as 90 percent of living species are unknown to science, and traditional approaches to discover them are unacceptably slow, scientists say. Human Biology At The Level Of Whole Systems ![]() Harvard Medical School today makes a significant commitment to the emerging field of systems biology in announcing the creation of the Department of Systems Biology (DSB), one of the first department-level systems biology programs in the nation. Systems Biology seeks to build from our current knowledge of genetic and molecular function to an understanding of how a whole cell works as a system and from there to multi-cellular systems such as organs and whole animals. |
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