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61.
Pirin Erdodu Ofer Lahav Saleem Zaroubi George Efstathiou Steve Moody John A. Peacock Matthew Colless Ivan K. Baldry Carlton M. Baugh Joss Bland-Hawthorn Terry Bridges Russell Cannon Shaun Cole Chris Collins Warrick Couch Gavin Dalton Roberto De Propris Simon P. Driver Richard S. Ellis Carlos S. Frenk Karl Glazebrook Carole Jackson Ian Lewis Stuart Lumsden Steve Maddox Darren Madgwick Peder Norberg Bruce A. Peterson Will Sutherland Keith Taylor 《Monthly notices of the Royal Astronomical Society》2004,352(3):939-960
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History and Progress of the North American Soil Geochemical Landscapes Project,2001-2010 总被引:1,自引:0,他引:1 下载免费PDF全文
David B.Smith William F.Cannon Laurel G.Woodruff Francisco Moreira Rivera Andrew N.Rencz Robert G.Garrett 《地学前缘》2012,19(3):19-32
In 2007,the U.S.Geological Survey,the Geological Survey of Canada,and the Mexican Geological Survey initiated a low-density(1 site per 1600 km2,13323 sites) geochemical and mineralogical survey of North American soils(North American Soil Geochemical Landscapes Project).Sampling and analytical protocols were developed at a series of workshops in 2003-2004 and pilot studies were conducted from 2004-2007.The ideal sampling protocol at each site includes a sample from 0-5 cm depth,a composite of the soil A horizon,and a sample from the soil C horizon.The <2-mm fraction of each sample is analyzed for Al,Ca,Fe,K,Mg,Na,S,Ti,Ag,Ba,Be,Bi,Cd,Ce,Co,Cr,Cs,Cu,Ga,In,La,Li,Mn,Mo,Nb,Ni,P,Pb,Rb,Sb,Sc,Sn,Sr,Te,Th,Tl,U,V,W,Y,and Zn by inductively coupled plasma-mass spectrometry and inductively coupled plasma-atomic emission spectrometry following a near-total digestion in a mixture of HCl,HNO3,HClO4,and HF.Separate methods are used for As,Hg,Se,and total C on this same size fraction.The major mineralogical components are determined by a quantitative X-ray diffraction method.Sampling in the conterminous U.S.was completed in 2010(c.4800 sites) with chemical and mineralogical analysis currently underway.In Mexico,approximately 66% of the sampling(871 sites) had been done by the end of 2010 with completion expected in 2012.After completing sampling in the Maritime provinces and portions of other provinces(472 sites,7.6% of the total),Canada withdrew from the project in 2010.Preliminary results for a swath from the central U.S.to Florida clearly show the effects of soil parent material and climate on the chemical and mineralogical composition of soils.A sample archive will be established and made available for future investigations. 相似文献
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Nikhil Padmanabhan Tamás Budavári David J. Schlegel Terry Bridges Jonathan Brinkmann Russell Cannon rew J. Connolly Scott M. Croom István Csabai Michael Drinkwater Daniel J. Eisenstein Paul C. Hewett Jon Loveday Robert C. Nichol Kevin A. Pimbblet Roberto De Propris Donald P. Schneider Ryan Scranton Uro Seljak Tom Shanks István Szapudi Alexander S. Szalay David Wake 《Monthly notices of the Royal Astronomical Society》2005,359(1):237-250
66.
Matt Hilton Chris Collins Roberto De Propris Ivan K. Baldry Carlton M. Baugh Joss Bland-Hawthorn Terry Bridges Russell Cannon Shaun Cole Matthew Colless Warrick J. Couch Gavin B. Dalton Simon P. Driver George Efstathiou Richard S. Ellis Carlos S. Frenk Karl Glazebrook Carole A. Jackson Ofer Lahav Ian Lewis Stuart Lumsden Steve J. Maddox Darren Madgwick Peder Norberg John A. Peacock Bruce A. Peterson Will Sutherland Keith Taylor 《Monthly notices of the Royal Astronomical Society》2005,363(2):661-674
67.
V. R. Eke Carlton M. Baugh Shaun Cole Carlos S. Frenk Peder Norberg John A. Peacock Ivan K. Baldry Joss Bland-Hawthorn Terry Bridges Russell Cannon Matthew Colless Chris Collins Warrick Couch Gavin Dalton Roberto De Propris Simon P. Driver George Efstathiou Richard S. Ellis Karl Glazebrook Carole Jackson Ofer Lahav Ian Lewis Stuart Lumsden Steve Maddox Darren Madgwick Bruce A. Peterson Will Sutherland Keith Taylor 《Monthly notices of the Royal Astronomical Society》2004,348(3):866-878
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Susan H. Cannon Eric M. Boldt Jayme L. Laber Jason W. Kean Dennis M. Staley 《Natural Hazards》2011,59(1):209-236
Following wildfires, emergency-response and public-safety agencies can be faced with evacuation and resource-deployment decisions
well in advance of coming winter storms and during storms themselves. Information critical to these decisions is provided
for recently burned areas in the San Gabriel Mountains of southern California. A compilation of information on the hydrologic
response to winter storms from recently burned areas in southern California steeplands is used to develop a system for classifying
magnitudes of hydrologic response. The four-class system describes combinations of reported volumes of individual debris flows,
consequences of debris flows and floods in an urban setting, and spatial extents of the hydrologic response. The range of
rainfall conditions associated with different magnitude classes is defined by integrating local rainfall data with the response
magnitude information. Magnitude I events can be expected when within-storm rainfall accumulations (A) of given durations (D) fall above the threshold A = 0.4D
0.5 and below A = 0.5D
0.6 for durations greater than 1 h. Magnitude II events will be generated in response to rainfall accumulations and durations
between A = 0.4D
0.5 and A = 0.9D
0.5 for durations less than 1 h, and between A = 0.5D
0.6 and A = 0.9D
0.5 or durations greater than 1 h. Magnitude III events can be expected in response to rainfall conditions above the threshold
A = 0.9D
0.5. Rainfall threshold-magnitude relations are linked with potential emergency-response actions as an emergency-response decision
chart, which leads a user through steps to determine potential event magnitudes and identify possible evacuation and resource-deployment
levels. Use of this information in planning and response decision-making process could result in increased safety for both
the public and emergency responders. 相似文献
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Darren S. Madgwick Ed Hawkins Ofer Lahav Steve Maddox Peder Norberg John A. Peacock Ivan K. Baldry Carlton M. Baugh Joss Bland-Hawthorn Terry Bridges Russell Cannon Shaun Cole Matthew Colless Chris Collins Warrick Couch Gavin Dalton Roberto De Propris Simon P. Driver George Efstathiou Richard S. Ellis Carlos S. Frenk Karl Glazebrook Carole Jackson Ian Lewis Stuart Lumsden Bruce A. Peterson Will Sutherland Keith Taylor 《Monthly notices of the Royal Astronomical Society》2003,344(3):847-856