Artificial Recharge in Las Vegas Valley, Clark County, Nevada     

Terry Katzer  Kay Brothers 《Ground water》1989,27(1):50-56

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A stochastic physical system approach to modeling river water quality     

W. F. Curi  T. E. Unny  J. J. Kay 《Stochastic Environmental Research and Risk Assessment (SERRA)》1995,9(2):117-132

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An assessment of the possible impacts of climate change on snow and peak river flows across Britain     

V. A. Bell  A. L. Kay  H. N. Davies  R. G. Jones 《Climatic change》2016,135(3-4):539-553

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Velocity Field of the Oyashio Region Observed with Satellite-Tracked Surface Drifters during 1999–2000     

Kay?I.?OhshimaEmail author  Masaaki?Wakatsuchi  Sei-Ichi?Saitoh 《Journal of Oceanography》2005,61(5):845-855

Based on the surface drifters that moved out from the Sea of Okhotsk to the Pacific, the surface velocity fields of mean, eddy, and tidal components in the Oyashio region are examined for the period September 1999 to August 2000. Along the southern Kuril Island Chain, the Oyashio Current, having a width of ∼100 km, exists with velocities of 0.2–0.4 m s⁻¹. From 40°N to 43°N, the Subarctic Current flows east- or northeastward with velocities of 0.1–0.3 m s⁻¹, accompanied by a meandering Oyashio or Subarctic front. Between the Oyashio and Subarctic current regions, an eddy-dominant region exists with both cyclonic and anticyclonic eddies. The existence of an eastward flow just south of Bussol' Strait is suggested. The 2000 anticyclonic warmcore ring located south of Hokkaido was found to have a nearly symmetric velocity structure with a maximum velocity of ∼0.7 m s⁻¹ at 70 km from the eddy center. Diurnal tidal currents with a clockwise tidal ellipse are amplified over the shelf and slope off Urup and Iturup Islands, suggesting the presence of diurnal shelf waves. From Lagrangian statistics, the single-particle diffusivity is estimated to be ∼10 × 10⁷ cm²s⁻¹.  相似文献   

Crustal structure of the South Florida Platform,eastern Gulf of Mexico: An ocean-bottom seismograph refraction study     

Joseph O. Ebeniro  William P. O'Brien Jr.  F. Jeanne Shaub 《Marine Geophysical Researches》1986,8(4):363-382

Five seismic refraction lines, 70–90 km long, were shot in the South Florida Platform region of the Gulf of Mexico using digital ocean-bottom seismographs. Apparent velocities and depths were calculated from the refracted arrivals using a flat-layer model for the region. The two dominant refractors have apparent compressional-wave velocity ranges of 5.6 to 5.9 km s^–1 and 6.2 to 6.7 km s^–1. On the Sarasota Arch, the depth to the top of a 5.8–5.9km/s layer is 3–4 km below sea level. This depth corresponds to the depth to the crystalline basement. The basement dips to the north and to the south from the arch, with velocity of the upper crust increasing from 5.8–5.9 km s^–1 to a maximum of 6.7 km s^–1 at a depth of 6.3 km. Under the continental slope, the crust has presumably been thinned and extended. The deepest refractor has an apparent velocity of about 7.5 km s^–1 at a depth of 25 km. The thickness of the crustal section and the absence of any mantle arrivals in these long refraction profiles on the platform suggest that thick continental crust underlies the South Florida Platform. A north-south cross-section through the platform suggests the presence of two structural highs separated by a portion of the South Florida Basin, which contains at least 5 km of sediment.  相似文献   

Variable tolerance to Copper in two species from San Francisco bay     

Samuel N. Luoma  Daniel J. Cain  Kay Ho  Anne Hutchinson 《Marine environmental research》1983,10(4):209-222

In static toxicity experiments, tolerance to soluble Cu of the bivalve, Macoma balthica, and the copepod, Acartia clausi, varied substantially among populations sampled within San Francisco Bay. Intraspecific tolerance differed ten-fold or more for both species over relatively small distances, suggesting geographical isolation of populations is not a prerequisite for the development of intraspecific differences in tolerance by aquatic organisms.  相似文献   

Population vulnerability to tsunami hazards informed by previous and projected disasters: a case study of American Samoa     

Wood  Nathan  Jones  Jeanne M.  Yamazaki  Yoshiki  Cheung  Kwok-Fai  Brown  Jacinta  Jones  Jamie L.  Abdollahian  Nina 《Natural Hazards》2019,95(3):505-528

Natural Hazards - Population vulnerability from tsunamis is a function of the number and location of individuals in hazard zones and their ability to reach safety before wave arrival. Previous...  相似文献   

Numerical model studies on the generation and dissipation of the diurnal coastal-trapped waves over the Sakhalin shelf in the Sea of Okhotsk     

Jun Ono  Kay I. Ohshima 《Continental Shelf Research》2010

To clarify the generation and dissipation mechanisms of diurnal coastal-trapped waves (CTWs) over the Sakhalin shelf, a series of numerical experiments were conducted using a three-dimensional tidal model of the Okhotsk Sea with density stratification. The tidal model used has good reproduction owing to the careful fitting to the recent observations. The numerical experiments suggested that diurnal CTWs are primarily (~60%) generated by the conversion of tidal energy at the northern corner of the Sakhalin shelf, and further amplified by vorticity generation due to the water column oscillation from Sakhalin Bay and the influence of Kashevarov Bank. From the observations, it was found that diurnal CTWs are effectively dissipated by the strong spin-down due to bottom friction. The conventional turbulent closure model cannot reproduce the observed damping of diurnal CTWs, which raises a caution in modeling the tidal fields in high-latitude regions where diurnal CTWs exist. To resolve this underestimation of the damping, the vertical eddy viscosity was parameterized using its dependence on the observed major axis length of the diurnal tidal current ellipses, which improves the model reproduction on the damping of diurnal CTWs. The model also suggests that the spin-down effects due to friction associated with the sea-ice cover play an important role in the tidal current reduction in the region where diurnal CTWs exist, as the observations suggested.  相似文献   

An Early Pliocene lake and its surrounding vegetation in Zhejiang,East China   总被引：1，自引：0，他引：1  

Jin-Feng Li  Ya-Qin Hu  David Kay Ferguson  Yu-Fei Wang  Cheng-Sen Li 《Journal of Paleolimnology》2010,43(4):751-769

The palynomorph composition of an Early Pliocene assemblage from Du’ao Lake, Zhejiang Province, East China, including sporomorphs and algae, was analyzed to reconstruct the vegetation and climate around the lake, as well as the environmental conditions in the lake. A subtropical evergreen and deciduous broad-leaved mixed forest surrounding the lake is inferred from the pollen data. The composition of the green algae community indicates a clear, shallow (about 5–6 m deep), mesotrophic freshwater lake. The inferred pH was about 7.0–8.0 during the algae growing season. Applying the Coexistence Approach, the climatic conditions in Early Pliocene Du’ao were: (1) mean annual temperature ranged from 18.1 to 22.0°C, (2) difference in temperature between the coldest and warmest months ranged from 14.2 to 15.1°C, (3) mean temperature of the coldest month varied from 10.7 to 12.1°C, (4) mean temperature of the warmest month ranged from 23.5 to 25.4°C, (5) mean annual precipitation varied from about 994 to 1,255 mm, (6) minimum monthly precipitation ranged from about 9 to 11 mm, and (7) maximum monthly precipitation varied from approximately 219 to 245 mm. These values indicate that the Early Pliocene climate was subtropical.  相似文献   

The determination of minor and trace element associations in coal using a sequential microwave digestion procedure     

Kay L. Laban  Brian P. Atkin 《International Journal of Coal Geology》1999,41(4):817

A sequential extraction procedure, using acid digestion in a CEM MDS-81D® microwave system, is reported for the investigation of trace and minor element associations in coal in (1) mineral phases other than pyrite, (2) pyrite and (3) the organic matrix. The concentrations of sulphate, pyrite and organic sulphur can also be determined by this method. The extract solutions from each stage are rapidly analysed by ICP-AES. The association of major, minor and trace elements with mineral and organic phases is suggested for a suite of certified reference coal samples. In stage 1, a significant percentage of the total Ba, Co, Cr, Cu, Mn, Ni, Pb and Sr was extracted suggesting an association with silicate, carbonate, sulphate and phosphate minerals for these elements. In stage 2, a proportion of the Cu, Mn, Ni, Pb and Zn was dissolved implying the occurrence of these elements in pyrite. An association with the organic matrix is suggested for Cr and also for Ba and Sr in lower rank coals.  相似文献