Corrigendum to “Post-solidification cooling and the age of Io's lava flows” [Icarus 176 (2005) 123-137]     

Ashley Gerard Davies  Dennis L. Matson  Glenn J. Veeder  Torrence V. Johnson  Diana L. Blaney 《Icarus》2007,186(2):590

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Direct photometric problem for spotted stars     

Diana P. Kjurkchieva 《Astrophysics and Space Science》1987,136(2):289-297

In the framework of the direct photometric problem we obtained an analytical representation of the light variations of binary systems of stars one of which with spots on its surface. The photometric effect is due to the mutual eclipses and to the rotation of the spotted component. These expressions can be used for the solution of the inverse problem for spotted stars.  相似文献   

The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) phase 2(c) Red-Arkansas River basin experiment:: 2. Spatial and temporal analysis of energy fluxes   总被引：3，自引：0，他引：3  

Xu Liang  Eric F. Wood  Dennis P. Lettenmaier  Dag Lohmann  Aaron Boone  Sam Chang  Fei Chen  Yongjiu Dai  Carl Desborough  Robert E. Dickinson  Qingyun Duan  Michael Ek  Yeugeniy M. Gusev  Florence Habets  Parviz Irannejad  Randy Koster  Kenneth E. Mitchell  Olga N. Nasonova  Joel Noilhan  John Schaake  Adam Schlosser  Yaping Shao  Andrey B. Shmakin  Diana Verseghy  Kirsten Warrach  Peter Wetzel  Yongkang Xue  Zong-Liang Yang  Qing-cun Zeng 《Global and Planetary Change》1998,19(1-4)

The energy components of sixteen Soil-Vegetation Atmospheric Transfer (SVAT) schemes were analyzed and intercompared using 10 years of surface meteorological and radiative forcing data from the Red-Arkansas River basin in the Southern Great Plains of the United States. Comparisons of simulated surface energy fluxes among models showed that the net radiation and surface temperature generally had the best agreement among the schemes. On an average (annual and monthly) basis, the estimated latent heat fluxes agreed (to within approximate estimation errors) with the latent heat fluxes derived from a radiosonde-based atmospheric budget method for slightly more than half of the schemes. The sensible heat fluxes had larger differences among the schemes than did the latent heat fluxes, and the model-simulated ground heat fluxes had large variations among the schemes. The spatial patterns of the model-computed net radiation and surface temperature were generally similar among the schemes, and appear reasonable and consistent with observations of related variables, such as surface air temperature. The spatial mean patterns of latent and sensible heat fluxes were less similar than for net radiation, and the spatial patterns of the ground heat flux vary greatly among the 16 schemes. Generally, there is less similarity among the models in the temporal (interannual) variability of surface fluxes and temperature than there is in the mean fields, even for schemes with similar mean fields.  相似文献   

MOST radio observations of GX 339−4, GRS 1915+105 and GRO J1655−40     

Diana Hannikainen  Richard Hunstead  Duncan Campbell-Wilson 《New Astronomy Reviews》1998,42(9-10)

We present results from the radio monitoring of the Galactic black hole candidates GX 339−4, GRS 1915+105 and GRO J1655−40 with the Molonglo Observatory Synthesis Telescope, and discuss how the radio data fit into the multiwavelength picture.  相似文献   

Multicolour Photometry of AM Her During 1994–96     

Diana Kjurkchieva  Dragomir Marchev  Marek Drozdz 《Astrophysics and Space Science》1998,262(4):453-476

Multicolour photometry of the polar AM Her was obtained during 3 observational seasons (1994/95/96). The star was in its high state for most of the observations. It was in its low state in '96 April. It was established that these two states differ not only in the average light level but in the larger amplitudes of variations at low state than at high state. Moreover the energy distributions of the two states differ in the stronger dependence of the flux on ν at high state than at low state. The Fourier analysis of the photometric data shows variability with the spectroscopic (orbital) period. The amplitudes of this variability in all colours are about two times bigger at low state than at high state. An attempt to explain the photometric behaviour of AM Her by a model of dominant emission of two hot spots at the magnetic poles of the white dwarf was made and the spot parameters were determined. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

A method of evaluating effects of antecedent precipitation on duststorms and its application to Yuma,Arizona, 1981–1988     

David J. Mackinnon  Diana F. Elder  Paula J. Helm  Marlene F. Tuesink  Catherine A. Nist 《Climatic change》1990,17(2-3):331-360

Precipitation causes several short- and long-term effects on wind-induced surface erodibility and subsequent dust emission. Among the principal effects considered by this paper are soil moisture, soil crusts, and vegetation. A quantitative method is developed to assess these effects using differences between the potential and the actual amounts of dust emitted from dust sources as inferred from surface meteorological measurements obtained downwind from those sources. The results of this assessment must be interpreted with caution, however, when the size and location of dust sources are unknown.Using meteorological data recorded near Yuma, Arizona at the Yuma Marine Corps Air Station (YMCAS), the method is applied to calculate the potential and actual amounts of dust emitted from upwind dust sources during the spring and fall/winter seasons between January 1, 1981 and May 31, 1988. (Spring is considered to be the period between February 1 and May 31; fall/winter, between October 1 and January 31.) Because summer precipitation is intermittent and wind patterns are localized, summer meteorological data are not used to evaluate regional correlations between precipitation and dust storms. For the period between 1981 and 1988, a correlation of -0.60 was found between fall/winter precipitation and the actual amount of dust emitted from sources upwind of YMCAS during the following spring. A particularly strong reduction in dust emission was noted during the springs of 1983 and 1984 following the start of an El Nino event in fall/winter 1982. Photographs taken at a geological and meteorological data-collection (Geomet) site, located in the natural desert 25 km southeast of YMCAS, show a correspondence between increased antecedent precipitation recorded at the site and increased vegetation. Whereas the annual precipitation totals at YMCAS and the Geomet site from the beginning of 1982 through 1984 are high, their seasonal totals, especially during the fall/winter seasons, are disparate. This fall/winter precipitation disparity may account for evidence suggesting that significant vegetation growth occurred at dust sources upwind of YMCAS by spring 1983, but that such growth did not occur at the Geomet site until fall/ winter of 1983. Spatial inhomogeneity in fall/winter precipitation probably contributed to the relatively low correlation (-0.60) between fall/winter precipitation recorded at YMCAS and the actual amount of dust emitted from upwind sources during the following spring.  相似文献   

The odd zonal harmonics in the Earth's gravitational potential     

D. G. King-Hele  G. E. Cook  Diana W. Scott 《Planetary and Space Science》1965,13(12):1213-1232

The odd zonal harmonics in the Earth's gravitational potential are determined by analysing the changes in the eccentricities of six satellites having orbital inclinations spaced as uniformly as possible between 28° and 96°. The most satisfactory representation of the potential is found to be in terms of four coefficients, and their values are, in the usual notation: 10⁶J₃ = −2.56, 10⁶J₅ = −0.15, 10⁶J₇ = −0.44, 10⁶J₉ = 0.12. The resulting potential is compared with that obtained by other authors. Three and five-coefficient solutions are also presented.  相似文献   

Formulas for structural dynamics: Igor A. Karnovsky and Olga I. Lebed; McGraw-Hill, Inc., New York, N.Y., 2001, pp. 535. Price $38, ISBN 0-07-136712-8.     

Patricio A.A. Laura Diana V. Bambill 《Ocean Engineering》2002,29(11):1459-1460

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Vibrations of a rectangular plate with a free edge in the case of discontinuously varying thickness     

Diana V. Bambill  Raúl E. Rossi  Verónica Jederlinic  Carlos A. Rossit 《Ocean Engineering》1997,24(1):45-49

Transverse vibrations of a rectangular plate with three edges elastically restrained against rotation while the fourth is free are studied using (a) an analytical approach based on the optimized Rayleigh-Ritz method and (b) the finite element method. The study was motivated by the necessity of finding out how the lower frequencies of vibration were affected by introducing a step discontinuity in the plate thickness. This variation in the plate thickness was practiced in order to obtain a reduction in the total plate weight.  相似文献   

Formulas for structural dynamics: Igor A. Karnovsky and Olga I. Lebed; McGraw-Hill, Inc., New York, N.Y., 2001, pp. 535. Price $38, ISBN 0-07-136712-8.     

Patricio A. A. Laura  Diana V. Bambill 《Ocean Engineering》2002,29(11):1459

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