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  • 1
    Online Resource
    Online Resource
    Cambridge :Cambridge University Press,
    Keywords: Meteorology. ; Electronic books.
    Description / Table of Contents: Complete with numerous exercise sets and solutions, Dynamics of the Atmosphere is written for advanced undergraduate and graduate students of meteorology and atmospheric science. The book consists of two parts, the first presenting the mathematical tools needed for a thorough understanding of dynamic atmospheric phenomena discussed in the second part.
    Type of Medium: Online Resource
    Pages: 1 online resource (739 pages)
    Edition: 1st ed.
    ISBN: 9780511202957
    DDC: 551.5
    Language: English
    Note: Cover -- Half-title -- Title -- Copyright -- Dedication -- Contents -- Preface -- Part 1 Mathematical tools -- M1 Algebra of vectors -- M1.1 Basic concepts and definitions -- M1.2 Reference frames -- M1.3 Vector multiplication -- M1.3.1 The scalar product of two vectors -- M1.3.2 The vector product of two vectors -- M1.3.3 The dyadic representation, the general product of two vectors -- M1.3.4 The scalar triple product -- M1.3.5 The vectorial triple product -- M1.3.6 The scalar product of a vector with a dyadic -- M1.3.7 Products involving four vectors -- M1.4 Reciprocal coordinate systems -- M1.5 Vector representations -- M1.6 Products of vectors in general coordinate systems -- M1.7 Problems -- M2 Vector functions -- M2.1 Basic definitions and operations -- M2.2 Special dyadics -- M2.2.1 The conjugate dyadic -- M2.2.2 The symmetric dyadic -- M2.2.3 The antisymmetric or skew-symmetric dyadic -- M2.2.4 The adjoint dyadic -- M2.2.5 The reciprocal dyadic -- M2.3 Principal-axis transformation of symmetric tensors -- M2.4 Invariants of a dyadic -- M2.4.1 The first scalar of a dyadic -- M2.4.2 The vector of a dyadic -- M2.4.3 The second scalar of a dyadic -- M2.4.4 The third scalar of a dyadic -- M2.5 Tensor algebra -- M2.6 Problems -- M3 Differential relations -- M3.1 Differentiation of extensive functions -- M3.2 The Hamilton operator in generalized coordinate systems -- M3.3 The spatial derivative of the basis vectors -- M3.4 Differential invariants in generalized coordinate systems -- M3.4.1 The first scalar or the divergence of the local dyadic… -- M3.4.2 The Laplacian of a scalar field function -- M3.4.3 The vector of the local dyadic… -- M3.5 Additional applications -- M3.6 Problems -- M4 Coordinate transformations -- M4.1 Transformation relations of time-independent coordinate systems -- M4.1.1 Introduction. , M4.1.2 Transformation of basis vectors and coordinate differentials -- M4.1.3 Transformation of vectors and dyadics -- M4.2 Transformation relations of time-dependent coordinate systems -- M4.2.1 The addition theorem of the velocities -- M4.2.2 Orthogonal q systems -- M4.2.3 The generalized vertical coordinate -- M4.3 Problems -- M5 The method of covariant differentiation -- M5.1 Spatial differentiation of vectors and dyadics -- M5.2 Time differentiation of vectors and dyadics -- M5.3 The local dyadic of v -- M5.4 Problems -- M6 Integral operations -- M6.1 Curves, surfaces, and volumes in the general q system -- M6.2 Line integrals, surface integrals, and volume integrals -- M6.3 Integral theorems -- M6.3.1 Stokes' integral theorem -- M6.3.2 Gauss' divergence theorem -- M6.4 Fluid lines, surfaces, and volumes -- M6.5 Time differentiation fluid integrals -- M6.5.1 Time differentiation of fluid line integrals -- M6.5.2 Time differentiation of fluid surface integrals -- M6.5.3 Time differentiation of fluid volume integrals -- M6.6 The general form of the budget equation -- M6.6.1 The budget equation for the partial masses of atmospheric air -- M6.6.2 The first law of thermodynamics -- M6.7 Gauss' theorem and the Dirac delta function -- M6.8 Solution of Poisson's differential equation -- M6.9 Appendix: Remarks on Euclidian and Riemannian spaces -- M6.10 Problems -- M7 Introduction to the concepts of nonlinear dynamics -- M7.1 One-dimensional flow -- M7.1.1 Fixed points and stability -- M7.1.2 Bifurcation -- M7.1.2.1 Saddle-node bifurcation -- M7.1.2.2 Transcritical bifurcation -- M7.1.2.3 Pitchfork bifurcation -- M7.2 Two-dimensional flow -- M7.2.1 Linear stability analysis -- M7.2.2 Classification of linear systems -- M7.2.3 Two-dimensional nonlinear systems -- M7.2.4 Limit cycles -- M7.2.5 Hopf bifurcation -- M7.2.6 The Liapunov function. , M7.2.7 Fractal dimensions -- Part 2 Dynamics of the atmosphere -- 1 The laws of atmospheric motion -- 1.1 The equation of absolute motion -- 1.2 The energy budget in the absolute reference system -- 1.3 The geographical coordinate system -- 1.3.1 Operations involving the rotational velocity vOmega -- 1.3.1.1 The divergence of v in the geographical coordinate system -- 1.3.1.2 Rotation and the vector gradient of vOmega -- 1.3.2 The centrifugal potential -- 1.3.3 The budget operator -- 1.4 The equation of relative motion -- 1.5 The energy budget of the general relative system -- 1.6 The decomposition of the equation of motion -- 1.7 Problems -- 2 Scale analysis -- 2.1 An outline of the method -- 2.2 Practical formulation of the dimensionless flow numbers -- 2.3 Scale analysis of large-scale frictionless motion -- 2.4 The geostrophic wind and the Euler wind -- 2.5 The equation of motion on a tangential plane -- 2.6 Problems -- 3 The material and the local description of flow -- 3.1 The description of Lagrange -- 3.2 Lagrange's version of the continuity equation -- 3.2.1 Preliminaries -- 3.2.2 The mass-conservation equation in the Lagrangian form -- 3.3 An example of the use of Lagrangian coordinates -- 3.3.1 General remarks -- 3.3.2 The thermo-hydrodynamic equations -- 3.3.3 Difference approximations -- 3.3.4 Initial values and boundary conditions -- 3.3.4.1 Approximate determination of… -- 3.3.4.2 The interpolated velocity…on the trajectory -- 3.3.5 The numerical stability condition -- 3.4 The local description of Euler -- 3.5 Transformation from the Eulerian to the Lagrangian system -- 3.6 Problems -- 4 Atmospheric flow fields -- 4.1 The velocity dyadic -- 4.1.1 The three-dimensional velocity dyadic -- 4.1.2 The two-dimensional velocity dyadic -- 4.2 The deformation of the continuum -- 4.2.1 The representation of the wind field. , 4.2.2 Flow patterns and stability -- 4.3 Individual changes with time of geometric fluid configurations -- 4.3.1 The relative change of the material line element -- 4.3.2 The directional change of the material line element -- 4.3.3 The change in volume of a rectangular fluid box -- 4.3.4 Two-dimensional examples -- 4.4 Problems -- 5 The Navier-Stokes stress tensor -- 5.1 The general stress tensor -- 5.1.1 Volume forces -- 5.1.2 Surface forces -- 5.2 Equilibrium conditions in the stress field -- 5.3 Symmetry of the stress tensor -- 5.4 The frictional stress tensor and the deformation dyadic -- 5.5 Problems -- 6 The Helmholtz theorem -- 6.1 The three-dimensional Helmholtz theorem -- 6.2 The two-dimensional Helmholtz theorem -- 6.3 Problems -- 7 Kinematics of two-dimensional flow -- 7.1 Atmospheric flow fields -- 7.2 Two-dimensional streamlines and normals -- 7.2.1 Two-dimensional streamlines -- 7.2.2 Construction of normals -- 7.3 Streamlines in a drifting coordinate system -- 7.4 Problems -- 8 Natural coordinates -- 8.1 Introduction -- 8.2 Differential definitions of the coordinate lines -- 8.3 Metric relationships -- 8.4 Blaton's equation -- 8.5 Individual and local time derivatives of the velocity -- 8.6 Differential invariants -- 8.6.1 The horizontal divergence of the velocity -- 8.6.2 Vorticity or the vertical component of… -- 8.6.3 The Jacobian operator and the Laplacian -- 8.7 The equation of motion for frictionless horizontal flow -- 8.8 The gradient wind relation -- 8.9 Problems -- 9 Boundary surfaces and boundary conditions -- 9.1 Introduction -- 9.2 Differential operations at discontinuity surfaces -- 9.3 Particle invariance at boundary surfaces, displacement velocities -- 9.4 The kinematic boundary-surface condition -- 9.4.1 External boundary surfaces -- 9.4.2 Internal boundary surfaces. , 9.4.3 The generalized vertical velocity at boundary surfaces -- 9.5 The dynamic boundary-surface condition -- 9.6 The zeroth-order discontinuity surface -- 9.6.1 The inclination of the zeroth-order DS -- 9.6.2 A discontinuity surface of zeroth-order in the geostrophic wind field -- 9.7 An example of a first-order discontinuity surface -- 9.8 Problems -- 10 Circulation and vorticity theorems -- 10.1 Ertel's form of the continuity equation -- 10.2 The baroclinic Weber transformation -- 10.3 The baroclinic Ertel-Rossby invariant -- 10.4 Circulation and vorticity theorems for frictionless baroclinic flow -- 10.4.1 A general baroclinic vortex theorem -- 10.4.2 Ertel's vortex theorem -- 10.4.3 Ertel's conservation theorem, potential vorticity -- 10.4.4 The general vorticity theorem -- 10.4.5 Rossby's formulation of the potential vorticity -- 10.4.6 Helmholtz's baroclinic vortex theorem -- 10.4.7 Thomson's and Bjerkness' baroclinic circulation theorems -- 10.4.8 Interpretation of Bjerkness' circulation theorem -- 10.5 Circulation and vorticity theorems for frictionless barotropic flow -- 10.5.1 The barotropic Ertel-Rossby invariant -- 10.5.2 Barotropic vortex theorems of Ertel, Helmholtz, and Thomson -- 10.5.3 Vortex lines and vortex tubes -- 10.5.4 The vorticity theorem for the barotropic atmosphere -- 10.6 Problems -- 11 Turbulent systems -- 11.1 Simple averages and fluctuations -- 11.2 Weighted averages and fluctuations -- 11.3 Averaging the individual time derivative and the budget operator -- 11.4 Integral means -- 11.5 Budget equations of the turbulent system -- 11.6 The energy budget of the turbulent system -- 11.7 Diagnostic and prognostic equations of turbulent systems -- 11.8 Production of entropy in the microturbulent system -- 11.8.1 Scalar fluxes -- 11.8.2 Vectorial fluxes -- 11.8.3 The scalar phenomenological equations. , 11.8.4 The vectorial phenomenological equations.
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  • 2
    Online Resource
    Online Resource
    Cambridge :Cambridge University Press,
    Keywords: Atmospheric radiation. ; Electronic books.
    Description / Table of Contents: Written for graduate students and researchers in meteorology and related sciences, this book presents the theory and applications of radiative transfer in the atmosphere. Problems of varying degrees of difficulty are included at the end of each chapter, allowing readers to further their understanding of the subject.
    Type of Medium: Online Resource
    Pages: 1 online resource (498 pages)
    Edition: 1st ed.
    ISBN: 9780511273377
    DDC: 551.527
    Language: English
    Note: Cover -- Half-title -- Title -- Copyright -- Dedication -- Contents -- Preface -- 1 Introduction -- 1.1 The atmospheric radiation field -- 1.2 The mean global radiation budget of the Earth -- 1.3 Solar-terrestrial relations -- 1.3.1 The equation of time -- 1.3.2 Geographical coordinates and the solar position -- 1.3.3 Long-term variations of the Earth's orbital parameters -- 1.4 Basic definitions of radiative quantities -- 1.5 The net radiative flux density vector -- 1.6 The interaction of radiation with matter -- 1.6.1 Absorption -- 1.6.2 Scattering -- 1.6.3 Emission -- 1.7 Problems -- 2 The radiative transfer equation -- 2.1 Eulerian derivation of the radiative transfer equation -- 2.1.1 The exchange of photons -- 2.1.2 The absorption of photons -- 2.1.3 The scattering of photons -- 2.1.4 The emission rate -- 2.1.5 The budget equation of the photon distribution function -- 2.2 The direct-diffuse splitting of the radiance field -- 2.3 The radiatively induced temperature change -- 2.4 The radiative transfer equation for a horizontally homogeneous atmosphere -- 2.5 Splitting of the radiance field into upwelling and downwelling radiation -- 2.6 The solution of the radiative transfer equation for a horizontally homogeneous atmosphere -- 2.6.1 The scattering atmosphere -- 2.6.2 The nonscattering atmosphere -- 2.7 Radiative flux densities and heating rates -- 2.7.1 The scattering atmosphere -- 2.7.2 The nonscattering atmosphere -- 2.8 Appendix -- 2.8.1 Local thermodynamic equilibrium -- 2.9 Problems -- 3 Principles of invariance -- 3.1 Definitions of the scattering and transmission functions -- 3.2 Diffuse reflection in a semi-infinite atmosphere -- 3.3 Chandrasekhar's four statements of the principles of invariance -- 3.4 The inclusion of surface reflection -- 3.5 Diffuse reflection and transmission for isotropic scattering -- 3.6 Problems. , 4 Quasi-exact solution methods for the radiative transfer equation -- 4.1 The matrix operator method -- 4.1.1 Derivation of the addition theorems -- 4.1.2 The optical properties of a homogeneous elementary layer -- 4.1.3 The doubling algorithm -- 4.1.4 Inhomogeneous atmospheres -- 4.2 The successive order of scattering method -- 4.3 The discrete ordinate method -- 4.4 The spherical harmonics method -- 4.5 The finite difference method -- 4.5.1 Vertical discretization in the finite difference method -- 4.5.2 Treatment of the boundary conditions -- 4.5.3 Computation of mean radiances and flux densities -- 4.6 The Monte Carlo method -- 4.6.1 Determination of photon paths -- 4.6.2 Treatment of absorption -- 4.7 Appendix -- 4.7.1 The reflection matrix at the ground -- 4.8 Problems -- 5 Radiative perturbation theory -- 5.1 Adjoint formulation of the radiative transfer equation -- 5.2 Boundary conditions -- 5.2.1 Vacuum boundary conditions -- 5.2.2 Boundary conditions for a reflecting surface -- 5.2.3 Inclusion of surface reflection in the formulation of the radiances -- 5.3 Radiative effects -- Example I -- Example II -- Example III -- 5.4 Perturbation theory for radiative effects -- 5.4.1 Basic perturbation theory -- 5.4.2 An alternative formulation of the radiative effect -- 5.4.3 Evaluation of the perturbation integral -- 5.5 Appendix -- 5.5.1 Linear operator and its adjoint -- 5.5.2 Superposition formula for the inclusion of Lambertian surface reflection -- 5.6 Problems -- 6 Two-stream methods for the solution of the radiative transfer equation -- 6.1 Delta-scaling of the phase function -- 6.2 The two-stream radiative transfer equation -- 6.3 Different versions of two-stream methods -- 6.3.1 Two-stream method with hemispheric isotropy -- 6.3.2 The Eddington approximation -- 6.3.3 Discrete ordinates formalism -- 6.3.4 Practical improved flux method. , 6.4 Analytical solution of the two-stream methods for homogeneous layer -- 6.5 Approximate treatment of scattering in the infrared spectral region -- 6.6 Approximations for partial cloud cover -- 6.6.1 Partial cloud cover with random overlap -- 6.6.2 Partial cloud cover with maximum overlap -- 6.7 The classical emissivity approximation -- 6.8 Radiation charts -- 6.9 Radiative equilibrium -- 6.10 Problems -- 7 Transmission in individual spectral lines and in bands of lines -- 7.1 The shape of single spectral lines -- 7.1.1 The Lorentz line -- 7.1.2 The thermal Doppler line -- 7.1.3 The Voigt profile -- 7.2 Band models -- 7.2.1 Mean absorption in a single Lorentz line -- 7.2.2 Band model for nonoverlapping lines -- 7.2.3 Random band models -- Goody's exponential model -- Godson's inverse power model -- The Malkmus model -- 7.2.4 Elsasser's regular model -- 7.2.5 The Schnaidt model -- 7.3 The fitting of transmission functions -- 7.3.1 Exponential sum-fitting of transmissions -- 7.3.2 The k-distribution method -- Basic illustration of the k-distribution method -- Algorithm for computing the k-distribution -- The cumulative k-distribution -- 7.3.3 The correlated k-distribution method -- 7.3.4 The k-distribution method for special situations -- Two overlapping gases -- Gray absorption coefficient -- Regular band of nonoverlapping rectangular lines -- Regular band of triangular lines -- Regular band of nonoverlapping Lorentz lines -- Single scattering properties for inhomogeneous atmospheres -- 7.4 Transmission in inhomogeneous atmospheres -- 7.4.1 One-parameter scaling -- 7.4.2 The two-parameter scaling technique of Curtis and Godson -- 7.5 Results -- 7.6 Appendix -- 7.6.1 Maxwell's velocity distribution and the mean molecular velocity -- 7.6.2 Original derivation of the Ladenburg and Reiche function. , 7.6.3 The Mittag-Leffler theorem and the Elsasser model -- Step 1 -- Step 2 -- 7.7 Problems -- 8 Absorption by gases -- 8.1 Introduction -- 8.2 Molecular vibrations -- 8.2.1 Two coupled harmonic oscillators -- 8.2.2 Review of physical principles -- 8.2.3 Linear triatomic molecules -- 8.2.4 Nonlinear triatomic molecules -- 8.3 Some basic principles from quantum mechanics -- 8.3.1 Stationary and coherent states -- (i) Stationary states -- (ii) Coherent states -- 8.3.2 The Schrödinger equation -- 8.3.3 Hamilton operator for a charged particle in an electromagnetic field -- 8.3.4 The interaction Hamiltonian -- 8.3.5 Computation of transition probabilities -- 8.3.6 Einstein transition probabilities -- 8.3.7 Line intensities -- 8.4 Vibrations and rotations of molecules -- 8.4.1 The harmonic oscillator -- 8.4.2 Vibration of diatomic molecules -- 8.4.3 Vibration of polyatomic molecules -- 8.4.4 Rotation of diatomic molecules -- 8.4.5 Vibration-rotation of diatomic molecules -- 8.5 Matrix elements, selection rules and line intensities -- 8.5.1 The harmonic oscillator -- 8.5.2 The rigid rotator -- 8.6 Influence of thermal distribution of quantum states on line intensities -- 8.7 Rotational energy levels of polyatomic molecules -- 8.7.1 Linear molecules -- 8.7.2 Symmetric top molecules -- 8.7.3 Spherical top molecules -- 8.7.4 Asymmetric top molecules -- 8.8 Appendix -- 8.8.1 The Hamilton function -- 8.8.2 Macroscopic fields and Maxwell's equations -- 8.9 Problems -- 9 Light scattering theory for spheres -- 9.1 Introduction -- 9.2 Maxwell's equations -- 9.3 Boundary conditions -- 9.4 The solution of the wave equation -- 9.4.1 Solution of the scalar wave equation in spherical coordinates -- 9.4.2 Solution of the vector wave equation in spherical coordinates -- 9.5 Mie's scattering problem -- 9.5.1 The incoming wave -- 9.5.2 The scattered and the interior waves. , 9.5.3 Rayleigh scattering -- 9.6 Material characteristics and derived directional quantities -- 9.6.1 Extinction, scattering and absorption coefficients -- 9.6.2 The scattering function and the scattering phase function -- 9.7 Selected results from Mie theory -- 9.8 Solar heating and infrared cooling rates in cloud layers -- 9.9 Problems -- 10 Effects of polarization in radiative transfer -- 10.1 Description of elliptic, linear and circular polarization -- 10.1.1 Linear polarization -- 10.1.2 Circular polarization -- 10.2 The Stokes parameters -- 10.3 The scattering matrix -- 10.3.1 Representation of the electric vector in the scattering plane -- 10.3.2 Transformation of the Stokes vector -- 10.4 The vector form of the radiative transfer equation -- 10.5 Problems -- 11 Remote sensing applications of radiative transfer -- 11.1 Introduction -- 11.2 Remote sensing based on short- and long-wave radiation -- 11.2.1 Methods based on the extinction of solar radiation -- Example: determination of the aerosol and ozone optical depth -- 11.2.2 Methods based on thermal emission -- (1) Nadir-looking instrument -- (2) Ground-based observations -- 11.3 Inversion of the temperature profile -- 11.3.1 Direct linear inversion -- 11.3.2 Linear inversion with constraints -- 11.3.3 Chahine's relaxation method -- 11.3.4 Smith's iterative inversion method -- 11.4 Radiative perturbation theory and ozone profile retrieval -- 11.5 Appendix -- 11.5.1 Example for an ill-posed inversion problem -- 11.6 Problems -- 12 Influence of clouds on the climate of the Earth -- 12.1 Cloud forcing -- 12.2 Cloud feedback in climate models -- 12.2.1 Cloud feedback in response to doubling atmospheric CO2 -- 12.2.2 Other trace gases -- 12.2.3 Liquid water and cloud microphysics feedback -- 12.2.4 Climatic impact due to aerosols -- 12.3 Problems -- Answers to problems -- Chapter 1 -- Chapter 2. , Chapter 3.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 63 (1966), S. 211-219 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The radiation tables byElsasser andCulbertson [1]2) are based upon an integrated form of the radiative transfer equation. Unfortunately, a term dealing with the temperature dependency of the transmission function is left out. This leads to an inconsistency of their analysis. It is the aim of this paper to correct and to modifyElsasser's graphical-numerical procedure such as to make his treatment internally consistent.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary This investigation concerns itself with the determination of infrared radiative flux divergence along the symmetry line of a cone. Such a cone, imbedded in the plane earth, is thought to idealize a large valley. The radiative transfer equations were set up in such a manner as to deal with the special geometry involved. It was found that radiative temperature changes within the valley are a strong function of the steepness of the valley walls.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 74 (1969), S. 110-133 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The study of radiative transfer in clouds and fog requires a knowledge of basic radiation constants. For this purpose the volume extinction, scattering, and absorption coefficients, the maximum absorption coefficients for composite spectral lines, and the coefficients used to expand the phase function into a series of Legendre polynomials for analytic representation of the phase function are provided in tabular and graphical format. The analysis for cloud droplets is based upon the rigorous electromagnetic theory. All Mie computations are carried out in an exact manner avoiding any approximations. Absorption line constants as computed here are based upon the investigations ofElsasser withCulbertson [5]3) andWyatt, Stull, andPlass [18]. Tabulations are made on the basis of fifty spectral intervals covering the entire solar and infrared spectra. Polarization effects are disregarded in this study.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Meteorology and atmospheric physics 24 (1975), S. 245-268 
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Wärme- und Feuchtefluß in den Grenzschichten des Erdbodens und der Atmosphäre werden als gekoppeltes, nicht-stationäres Gleichungssystem erfaßt. Die numerische Lösung des Systems führt auf die hier zu untersuchende Temperaturverteilung der bodennahen Luftschicht und des Erdbodens. Der Luftaustausch wird mittels der Keyps-Formel erfaßt, während die Diffusionsgleichungen des Erdbodens sich auf die Theorie von Philip [8] stützen. Die langwelligen und globalen Strahlungsströme werden nach Methoden berechnet, die von Möller [7] und Philipps [10] skizziert wurden. Resultate werden mit Meßdaten des Great-Plains-Turbulence-Projektes von Lettau und Davidson [4] sowie mit dem Sasamorischen Modell [15] verglichen, welches zum Teil auf der sogenannten Constant-Flux-Annahme beruht. Es wird gefunden, daß vernünftige Variationen der Bodenfeuchte nicht-vernachlässigbare Variationen in den Temperaturprofilen des Erdbodens und der bodennahen Luftschicht hervorrufen. Die Resultate weichen jedoch nicht kritisch voneinander ab. Eine sachgerechte Erfassung des Erdbodentypus kann von größerer Wichtigkeit sein als die Beschreibung der Bodenfeuchte, die meist nur ganz ungenau bekannt ist.
    Notes: Summary The soil and atmospheric boundary layers, considered as a coupled, non-steady state, heat-moisture transfer system, is analyzed to examine the effects of soil moisture variations upon the temperature distributions of the air layer near the ground and the underlying soil. The exchange coefficient for the air is approximated by the Keyps formula; the soil diffusion equations follow the theory of Philip [8]; a method described by Möller [7] is used to treat the long wave radiation; and global radiation is obtained using a procedure first outlined by Philipps [10]. The results of this analysis are subsequently compared with actual data collected in the Great Plains Turbulence Project by Lettau and Davidson [4] and with the model of Sasamori [15] which is partly based upon the constant flux assumption. It is found that reasonable variation in the soil moisture content gives non-negligible variations of the temperature profile in the atmosphere as well as in the soil. Results, however, are not critically different from each other. The specification of the soil type can be of greater importance than the description of soil moisture which is hardly ever known.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 112 (1974), S. 739-752 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The present study deals with the approximate scattering characteristics of optically thin cirrus clouds which are known to exist in the vicinity of the tropopause. The assumed homogeneous ice model cloud is composed of randomly oriented circular cylinders of uniform size. The spectral region investigated extends from 0.6–0.7 μ, where absorption by ice and atmospheric gases is negligible Radiative upward and downward intensities are calculated for a uniform ground albedo of 0 and 0.25 using the assumption that multiple-scattering can be disregarded. A rough comparison with the Rayleigh scattering characteristics in this spectral region indicates that remote sensing of the atmosphere is affected very little by the presence of optically thin cirrus assuming the validity of the above assumptions.
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  • 8
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A radiative-conductive model is constructed to study short-term effects of various carbon dioxide concentrations on the atmospheric boundary layer for different seasons. The distribution of the exchange coefficient is modeled with the aid of the KEYPS formula. Infrared radiation calculations are carried out by means of the emissivity method and by assuming that water vapor and carbon dioxide are the only radiatively active gases. Global radiation is computed by specification of Linke's turbidity factor. It is found that doubling the carbon dioxide concentration increases the temperature near the ground by approximately one-half of one degree if clouds are absent. A sevenfold increase of the present normal carbon dioxide concentration increases the temperature near the ground by approximately one degree. Temperature profiles resulting from presently observed carbon dioxide concentration and convective cloudiness of 50% or less are compared with those resulting from doubled carbon dioxide concentrations and the same amounts of cloud cover. Again, it is found that a doubling of carbon dioxide increases the temperature in the lower boundary layer by about one-half of one degree. The present results are obtained on the basis of fixed temperature boundary conditions as contrasted to the study ofManabe andWetherald (1967). Howeve, the conclusions are not addressed to global climate change, but to the distribution of the temperature of the air layer near the ground.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 117 (1979), S. 927-934 
    ISSN: 1420-9136
    Keywords: Elsasser radiation tables ; Radiation transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In a recent paperCharlock, Herman andZdunkowski (1976) disagree on how best to apply the Radiative Transfer Equation (RTE) in the construction of Elsasser type radiation tables. The two proposed approximation solutions are analyzed and compared against a quasiexact solution. Infrared fluxes and cooling rates are calculated for part of the 6.3 μm water vapor band for two model atmospheres. It is found that the Zdunkowski (Z) approximation yields more accurate downward fluxes, while the Charlock-Herman (CH) approximation, in general, results in more accurate upward fluxes. For the two model atmospheres studied the cooling rates for theZ approximation are usually of better quality than those due to the CH solution, unless the divergence of the net flux is extremely small.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 75 (1969), S. 278-299 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The system of physical equations describing temperature changes near the ground in fog-free air as well as in radiation fog is solved numerically. The variation of the exchange coefficient with height is taken into account using different models while time variations are still disregarded. Temperature changes due to latent heat effects are incorporated in this study. Moreover, the presence of radiative flux divergence is included in an approximate manner. The solution of the problem is presented in terms of graphs showing the development of temperature and water droplet profiles as function of time and height. Computed liquid water content as well as temperature profiles are in general agreement with observations while the vertical growth of fog usually proceeds too rapidly. Concrete suggestions are given of how to improve the model.
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