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Rivers indicate earlier snowmelt in eastern North America
March 27, 2006Scientists at the U.S. Geological Survey (USGS) have found evidence in eastern North America that the snow is melting and running off into rivers earlier than it did in the first half of the 20th century. According to a USGS study published in the most recent issue of Geophysical Research Letters, winter-spring flows in many rivers in the northern United States and Canada are occurring earlier by 5-10 days.
"We studied rural, unregulated rivers with more than 50 years of USGS and Environment Canada river flow data," explained Glenn Hodgkins, lead author and hydrologist at the USGS Maine Water Science Center. "Some 179 rivers in eastern North America met the criteria of our study with 147 in the United States from the Dakotas to New England and 32 in Canada from Manitoba to Newfoundland. These rivers are sensitive to changes in precipitation and temperature," added Robert Dudley, study co-author.
In 2005, researchers from Scripps Institution of Oceanography and the USGS found earlier streamflow across large portions of western North America in rivers with significant snowmelt runoff.
The documented changes in the timing of winter-spring streamflows in eastern North America may be important to aquatic ecosystems but the impacts of these changes are not well understood. One possible impact may be on the survival rate of Atlantic salmon.
United States Geological Survey
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Two University of the Alaska Fairbanks researchers are among key contributors to a new national report that details visible effects of climate change in the United States and how today's choices stand to affect the future.
New study links western tree mortality to warming temperatures, water stress
A new study led by the U.S. Geological Survey and involving the University of Colorado at Boulder indicates tree deaths in the West's old-growth forests have more than doubled in recent decades, likely from regional warming and related drought conditions.
Dirty snow causes early runoff in Cascades, Rockies
Soot from pollution causes winter snowpacks to warm, shrink and warm some more. This continuous cycle sends snowmelt streaming down mountains as much as a month early, a new study finds.
Climate change effects on imperiled Sierra frog examined
Climate change can have significant impacts on high-elevation lakes and imperiled Sierra Nevada Yellow-legged frogs that depend upon them, according to U.S. Forest Service and University of California, Berkeley, scientists.
Wildfires result in loss of forests reserved by Northwest Forest Plan
Although the Northwest Forest Plan (NWFP) significantly reduced cutting of old-growth forests on federal land, forests in the driest regions are now at greater risk of being lost to wildfire than to logging.
Stanford researchers: Global warming is killing frogs and salamanders in Yellowstone Park
Frogs and salamanders, those amphibious bellwethers of environmental danger, are being killed in Yellowstone National Park. The predator, Stanford researchers say, is global warming.
Earthworm activity can alter forests' carbon-carrying capabilities
Earthworms can change the chemical nature of the carbon in North American forest litter and soils, potentially affecting the amount of carbon stored in forests, according to Purdue University researchers.
Satellite data reveals extreme summer snowmelt in northern Greenland, CCNY professor says
The northern part of the Greenland ice sheet experienced extreme snowmelt during the summer of 2008, with large portions of the area subject to record melting days.
Study: Future snowmelt in West twice as early as expected; threatens ecosystems and water reserves
According to a new study, global warming could lead to larger changes in snowmelt in the western United States than was previously thought, possibly increasing wildfire risk and creating new water management challenges for agriculture, ecosystems and urban populations.
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Runoff from Snowmelt by U.S. Army Corps of Engineers (Author) This manual provides technical background and guidance for computing basin snowmelt runoff as is necessary in the design and operation of water control projects. This manual discusses the basic theoretical principles of snow hydrology and the practical applications of this theory in forecasting and design. It summarizes several important snowmelt runoff models and offers guidelines for model selection. |
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Runoff From Snowmelt: Engineering Water Control Flood: USACE Engineer Reference Manual on CD-ROM by WVNAVY This manual provides technical background and guidance for computing basin snowmelt runoff as is necessary in the design and operation of U.S. Army Corps of Engineers (USACE) water control projects. This manual discusses the basic theoretical principles of snow hydrology and the practical applications of this theory in forecasting and design. It summarizes several important snowmelt runoff models and offers guidelines for model selection. This manual represents an update of EM 1110-2-1406, Runoff from Snowmelt, dated 5 January 1960, which is now obsolete. While many of the basic principles and techniques presented in that manual have been retained, numerous advancements in computer, communications, and data acquisition technologies are now reflected. This manual is applicable to USACE... |
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Snowmelt Timberdoodles: and Other Excursions by Herschel Raney (Author) Memory is the electric skeleton for the visual life. Here are trips into marshes and swamps, forests and stream valleys and the associations triggered from such simple experiences. Whether we go to forget or to remember, these are the traces of one walker’s year among insects and birds, through the seasons in the Mississippi and Arkansas River Valleys. Neither biography nor diary, it is at times personal narrative and at times just the moment conveyed as purely as possible. We are sometimes only what we have seen and who we recall in the seeing. It is the joy of going, even for an hour. This is the come-back-and-tell-it part. Among dogs, armadillos, songbirds and children, sometimes it is best just to be humble and stay out of the way. Sometimes you laugh and write it down. |
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Takakkaw Falls Swollen by Summer Snowmelt, British Columbia (B.C.), Canada Art Photographic Poster Print by Ruth Tomlinson, 30x40 by AllPosters.com AllPosters.com is the world's #1 seller of posters, prints, photographs, specialty products and framed art. We're dedicated to bringing our customers the best selection of high quality wall décor that is perfect for their home or office. Browse our catalog of over 300,000 items that include entertainment and specialty posters, decorative prints, and art reproductions. Whether you're looking for your favorite movie or music poster, a framed Monet reproduction, or a print of the Eiffel Tower you will find it at AllPosters.com. Visit our Amazon store today at www.amazon.com/allposters to find Special Offers and search by subject category or artist. AllPosters.com provides unmatched service with a 100% satisfaction guarantee. We ship internationally to over 80 countries. Decorate your... |
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Metal concentrations in Kandalaksha Bay, White Sea (Russia) following the spring snowmelt [An article from: Environmental Pollution] by A. Cobelo-Garcia (Author), G.E. Millward (Author), R. Prego (Author), Lukashi (Author) This digital document is a journal article from Environmental Pollution, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Elevated concentrations of dissolved and particulate Cd, Cu, Pb and Zn have been determined in the waters of Kandalaksha Bay (White Sea, Russia), following the ice melt in the spring of 2000. Dissolved metal maxima in the surface waters were observed at some stations and concentrations generally decreased with depth. The suspended particulate matter (SPM) comprised a non-lithogenic fraction in the range 12-83%, and had elevated metal concentrations that showed no trend with depth or salinity and was... |
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