On the dynamics of the molecular temperature boundary layer above the sea     

Th. Foken  S. A. Kitajgorodskij  O. A. Kuznecov 《Boundary-Layer Meteorology》1978,15(3):289-300

Results of measurements carried out in the Caspian Sea in 1975 and 1976 have been used to study the thickness of the molecular temperature boundary layer and the difference of temperature in this layer as functions of hydrometeorological parameters. This thickness of the molecular temperature boundary layer was found to be dependent on both the friction velocity and wave phase. The same is also true for the temperature difference. On the other hand, it was not possible to observe a definite dependence upon the roughness of the surface of the sea and the stability.  相似文献   

Microwave remote sensing of sea ice in the AIDJEX Main Experiment     

W. J. Campbell  J. Wayenberg  J. B. Ramseyer  R. O. Ramseier  M. R. Vant  R. Weaver  A. Redmond  L. Arsenaul  P. Gloersen  H. J. Zwally  T. T. Wilheit  T. C. Chang  D. Hall  L. Gray  D. C. Meeks  M. L. Bryan  F. T. Barath  C. Elachi  F. Leberl  T. Farr 《Boundary-Layer Meteorology》1978,13(1-4):309-337

During the AIDJEX Main Experiment, April 1975 through May 1976, a comprehensive microwave sensing program was performed on the sea ice of the Beaufort Sea. Surface and aircraft measurements were obtained during all seasons using a wide variety of active and passive microwave sensors. The surface program obtained passive microwave measurements of various ice types using four antennas mounted on a tracked vehicle. In three test regions, each with an area of approximately 1.5 × 10⁴ m², detailed ice crystallographic, dielectric properties, and brightness temperatures of first-year, multiyear, and first-year/multiyear mixtures were measured. A NASA aircraft obtained passive microwave measurements of the entire area of the AIDJEX manned station array (triangle) during each of 18 flights. This verified the earlier reported ability to distinguish first-year and multiyear ice types and concentration and gave new information on ways to observe ice mixtures and thin ice types. The active microwave measurements from aircraft included those from an X- and L-band radar and from a scatterometer. The former is used to study a wide variety of ice features and to estimate deformations, while both are equally usable to observe ice types. With the present data, only the scatterometer can be used to distinguish positively multiyear from first-year and various types of thin ice. This is best done using coupled active and passive microwave sensing.We dedicate this work to our beloved friend William NordbergHe pioneered in microwave ice observations, and his brilliance and enthusiasm inspired all of us.  相似文献   

Economic and geographical factors     

O. Jakobsen 《GeoJournal》1978,2(4):355-376

  相似文献   

Refinement of the principal parameters of earthquake sources in seismological practice     

N.V. Kondorskaya  A.I. Zakharova  O.N. Solovieva 《Tectonophysics》1978,49(3-4)

  相似文献   

Numerical solution of micro-physical equations in a model of a convective cloud     

Dana Lakomá  Reviewer O. Zikmunda 《Studia Geophysica et Geodaetica》1977,21(1):85-98

Summary The procedure for computation and the numerical results of the first testing of the so-called Mi-operation, which is a construction unit of the model of a convective cloud[1] and represents the formulation of microphysical phenomena occurring in a convective cloud, are described. In this paper the Mi-operation is applied to the case of the liquid stage, restricted to condensation and drop evaporation. The solution of the corresponding system of kinetic equations serves the purpose of an initial test of the applicability of the integration method to the type of equations mentioned.  相似文献   

A spectrum of the acoustic-gravity waves associated with Auroral electro-jet     

E. O. Okeke 《Pure and Applied Geophysics》1977,115(3):593-606

This model concerns the analysis of Aurora initiated travelling pressure waves in an isothermal atmosphere. Electro-dynamic Lorentz Force associated with auroral electric current density during the periods of geomagnetic activity is invoked as a possible exciting source.The dispersion phenomena in auroral induced acoustic gravity modes in the earth's atmosphere are examined and various cut-off frequencies analysed.Finally, an attempt is made to obtain a far field representation of the forced oscillations by means of Green's Function technique. Therefrom, the spectral amplitudes of the ground-level oscillations are computed. Incorporating various scaling factors, it is deduced that these amplitude components are in reasonable agreement with the results of recent measurements.  相似文献   

On one generalization of trochoidal waves     

Dagmar Novotná  Vojtěch Vítek  Reviewer O. Zikmunda 《Studia Geophysica et Geodaetica》1977,21(1):81-84

Summary The concept of the generalized trochoidal waves discussed in[1] is revised and modified. A new formula defining the auxiliary function (b, c) was found with the aid of the results derived in[3] and some physical considerations.  相似文献   

Secondary vorticity centres as centres of secondary (streamwise) vorticity     

Pavla Kočíková  Reviewer O. Zikmunda 《Studia Geophysica et Geodaetica》1977,21(2):185-194

Summary The theory of secondary vorticity is used to explain the essence of so-called secondary or upper vorticity centres, discovered on satellite photographs. The general equation of vorticity, which is then adjusted by means of the equations of state and motion, is transformed into a specially selected intrinsic co-ordinate system. Three-component equations of vorticity are discussed for cases important meteorologically. The conclusion could be drawn that the secondary vorticity centres may be identified with centres of so-called secondary vorticity and that the theoretical facts about their origin and occurrence may be used, together with satellite photographs, to improve weather forecasts.  相似文献   

The Structural geology of the Troms Area (Barents-Sea)     

O. Øvrebø  E. Talleraas 《GeoJournal》1977,1(1):47-54

This paper reviews the exploration history of the Barents Sea part of the Norwegian continental shelf. The main structural elements which so far have been identified in the Troms/Finnmark/Barents Sea region are outlined and discussed. Special attention is given to the selected Area I outside Troms, where according to latest government plans, drilling will start in 1978. At least two different fault systems are discribed in Area I. The salt diapirs in the Tromsø Basin and their location relative to the fault pattern are discussed. A schematic structural model for Area I is suggested.  相似文献   

The evolution of the crystalline rocks: edited by D. K. Bailey and R. MacDonald,Academic Press,London, 1976, 484 pp., $35.00     

B.O. Mysen 《Geochimica et cosmochimica acta》1977,41(9):1406

  相似文献