Elevated mercury concentrations in failed eggs of Snowy Plovers at Point Reyes National Seashore     

Schwarzbach SE  Stephenson M  Ruhlen T  Abbott S  Page GW  Adams D 《Marine pollution bulletin》2005,50(11):1444-1447

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Stratigraphy and Mesozoic–Cenozoic tectonic history of northern Sierra Los Ajos and adjacent areas,Sonora, Mexico     

William R. Page  Floyd Gray  Alexander Iriondo  Daniel Miggins  Robert B. Blodgett  Florian Maldonado  Robert J. Miller 《Journal of South American Earth Sciences》2010,29(3):557-571

Geologic mapping in the northern Sierra Los Ajos reveals new stratigraphic and structural data relevant to deciphering the Mesozoic–Cenozoic tectonic evolution of the range. The northern Sierra Los Ajos is cored by Proterozoic, Cambrian, Devonian, Mississippian, and Pennsylvanian strata, equivalent respectively to the Pinal Schist, Bolsa Quartzite and Abrigo Limestone, Martin Formation, Escabrosa Limestone, and Horquilla Limestone. The Proterozoic–Paleozoic sequence is mantled by Upper Cretaceous rocks partly equivalent to the Fort Crittenden and Salero Formations in Arizona, and the Cabullona Group in Sonora, Mexico.Absence of the Upper Jurassic–Lower Cretaceous Bisbee Group below the Upper Cretaceous rocks and above the Proterozoic–Paleozoic rocks indicates that the Sierra Los Ajos was part of the Cananea high, a topographic highland during the Late Jurassic and Early Cretaceous. Deposition of Upper Cretaceous rocks directly on Paleozoic and Proterozoic rocks indicates that the Sierra Los Ajos area had subsided as part of the Laramide Cabullona basin during Late Cretaceous time. Basal beds of the Upper Cretaceous sequence are clast-supported conglomerate composed locally of basement (Paleozoic) clasts. The conglomerate represents erosion of Paleozoic basement in the Sierra Los Ajos area coincident with development of the Cabullona basin.The present-day Sierra Los Ajos reaches elevations of greater than 2600 m, and was uplifted during Tertiary basin-and-range extension. Upper Cretaceous rocks are exposed at higher elevations in the northern Sierra Los Ajos and represent an uplifted part of the inverted Cabullona basin. Tertiary uplift of the Sierra Los Ajos was largely accommodated by vertical movement along the north-to-northwest-striking Sierra Los Ajos fault zone flanking the west side of the range. This fault zone structurally controls the configuration of the headwaters of the San Pedro River basin, an important bi-national water resource in the US-Mexico border region.  相似文献   

Numerical Analysis of the Effects of Wind and Sprayer Type on Spray Distribution in Different Orchard Training Systems     

Ashenafi T. Duga  Donald Dekeyser  Kris Ruysen  Dany Bylemans  David Nuyttens  Bart M. Nicolai  Pieter Verboven 《Boundary-Layer Meteorology》2015,157(3):517-535

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Erratum to: Impacts of rising air temperatures and emissions mitigation on electricity demand and supply in the United States: a multi-model comparison     

James McFarland  Yuyu Zhou  Leon Clarke  Patrick Sullivan  Jesse Colman  Wendy S. Jaglom  Michelle Colley  Pralit Patel  Jiyon Eom  Son H. Kim  G. Page Kyle  Peter Schultz  Boddu Venkatesh  Juanita Haydel  Charlotte Mack  Jared Creason 《Climatic change》2015,132(4):739-739

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Palynological Analysis of Amber-Bearing Clay from the Lower Cretaceous of Central Lebanon   总被引：1，自引：0，他引：1  

Dany AZAR  Jean DEJAX  Edwige MASURE 《《地质学报》英文版》2011,85(4):942-949

An amber-bearing lignitic layer of sandy clay from the Lower Cretaceous of Central Lebanon (Mderej-Hammana)yielded a well-preserved,moderately variegated palynoflora,which origin is mixed between land plants and marine microflora.Its detailed analysis led to fulfill its inventory,to propose a paleoenvironmental reconstruction,and to draw the paleoclimate which prevailed over the region:an estuarian area under a rather humid,temperate climate;a variety of ferns grew near the shore-side and in the inward l...  相似文献   

Climate impact of transportation A model comparison     

Bastien Girod  Detlef P. van Vuuren  Maria Grahn  Alban Kitous  Son H Kim  Page Kyle 《Climatic change》2013,118(3-4):595-608

Transportation contributes to a significant and rising share of global energy use and GHG emissions. Therefore modeling future travel demand, its fuel use, and resulting CO₂ emission is highly relevant for climate change mitigation. In this study we compare the baseline projections for global service demand (passenger-kilometers, ton-kilometers), fuel use, and CO₂ emissions of five different global transport models using harmonized input assumptions on income and population. For four models we also evaluate the impact of a carbon tax. All models project a steep increase in service demand over the century. Technology change is important for limiting energy consumption and CO₂ emissions, the study also shows that in order to stabilise or even decrease emissions radical changes would be required. While all models project liquid fossil fuels dominating up to 2050, they differ regarding the use of alternative fuels (natural gas, hydrogen, biofuels, and electricity), because of different fuel price projections. The carbon tax of 200 USD/tCO₂ in 2050 stabilizes or reverses global emission growth in all models. Besides common findings many differences in the model assumptions and projections indicate room for further understanding long-term trends and uncertainty in future transport systems.  相似文献   

Cooling of neutron stars with strong toroidal magnetic fields     

Dany Page  Ulrich Geppert  Manfred Küker 《Astrophysics and Space Science》2007,308(1-4):403-412

We present models of temperature distribution in the crust of a neutron star in the presence of a strong toroidal component superposed to the poloidal component of the magnetic field. The presence of such a toroidal field hinders heat flow toward the surface in a large part of the crust. As a result, the neutron star surface presents two warm regions surrounded by extended cold regions and has a thermal luminosity much lower than in the case the magnetic field is purely poloidal. We apply these models to calculate the thermal evolution of such neutron stars and show that the lowered photon luminosity naturally extends their life-time as detectable thermal X-ray sources. Work partially supported by UNAM-DGAPA grant #IN119306.  相似文献   

An XMM–Newton observation of the narrow-line Seyfert 1 galaxy Markarian 896     

K. L. Page  P. T. O'Brien  J. N. Reeves  A. A. Breeveld 《Monthly notices of the Royal Astronomical Society》2003,340(3):1052-1056

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Fe K emission and absorption features in XMM–Newton spectra of Markarian 766: evidence for reprocessing in flare ejecta     

K. A. Pounds  J. N. Reeves  K. L. Page  G. A. Wynn  P. T. O'Brien 《Monthly notices of the Royal Astronomical Society》2003,342(4):1147-1155

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XMM–Newton observations of seven soft X-ray excess quasi-stellar objects     

K. L. Page  N. Schartel  M. J. L. Turner  P. T. O'Brien 《Monthly notices of the Royal Astronomical Society》2004,352(2):523-534

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