Radiation and Optics in the Atmosphere

Platt, U.; Pfeilsticker, K.; Vollmer, Michael

doi:10.1007/978-3-642-19409-2_23

Cited by 11 publications

(9 citation statements)

References 180 publications

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“…Equation [6.2] provides the basis for many forms of long-path absorption spectroscopy using coherent light sources such as lasers; these are applicable, for instance, to atmospheric studies. They include: open-path laser absorption spectroscopy, in which a laser beam passes from a distant retro-refl ector and back to a detector that is co-located with the laser (Schiff et al , 1994;Platt, 1994Platt, , 2000Platt et al , 2012); LIDAR ( li ght d etection a nd r anging) and its dual-channel modifi cation DIAL, in which the temporal or phase characteristics of light provide an optical ranging capability (Grant and Menzies, 1983;Killinger et al , 1983Killinger et al , , 1987Grant, 1987Grant, , 1995Svanberg, 1994;Orr, 2000;Wolf, 2000;Strizik et al , 2008;Platt et al , 2012); and multi-pass absorption spectroscopy, which uses folded-path cell designs such as those of White (1942White ( , 1976 and Herriott et al . (1964) and yields optical pathlengths d eff that are typically hundreds of times the length of the absorption cell itself (Hanst and Hanst, 1994;Schiff et al , 1994;Tittel and Petrov, 2000;Tittel et al ., 2003).…”

Section: Preliminaries: Long-path Absorption Spectroscopy Without a Cmentioning

confidence: 99%

Cavity-based absorption spectroscopy techniques

Orr

2014

Laser Spectroscopy for Sensing

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Section: Preliminaries: Long-path Absorption Spectroscopy Without a Cmentioning

confidence: 99%

Cavity-based absorption spectroscopy techniques

Orr

2014

Laser Spectroscopy for Sensing

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“… Ω (7) The propagation direction vector can be calculated by definition as The free traveling path length l of a photon bundle can be determined in the same way as in traditional MC method for radiative transfer. Considering the extinction coefficient is homogeneous, the free traveling path length l of the photon bundle can be simulated as [20,48] 1 ln l lR   (11) where l R is a random number of uniform distribution in [0,1] .…”

Section: Moving In Gradient-index Mediummentioning

confidence: 99%

“…Theory of radiative transfer in gradient-index media is fundamental to study the light transport in such media, and is of significant importance for the applications (or potential applications) in the fields of atmospheric remote sensing [1][2][3][4], atmospheric optics [5][6][7][8][9], and non-contact measurement of temperature distribution in flames [10][11][12], etc.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo method for polarized radiative transfer in gradient-index media

Zhao

Tan

Liu

2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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Light transfer in gradient-index media generally follows curved ray trajectories, which will cause light beam to converge or diverge during transfer and induce the rotation of polarization ellipse even when the medium is transparent. Furthermore, the combined process of scattering and transfer along curved ray path makes the problem more complex. In this paper, a Monte Carlo method is presented to simulate polarized radiative transfer in gradient-index media that only support planar ray trajectories. The ray equation is solved to the second order to address the effect induced by curved ray trajectories. Three types of test cases are presented to verify the performance of the method, which include transparent medium, Mie scattering medium with assumed gradient index distribution, and Rayleigh scattering with realistic atmosphere refractive index profile. It is demonstrated that the atmospheric refraction has significant effect for long distance polarized light transfer.

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“…As solar irradiance passes through the atmosphere to the sea surface, it is subject to complex processes -absorption, scattering, reflection and refraction by the numerous constituents of the atmosphere -which reduce part of its energy and alter its spectrum (e.g. Liu 1980, Timofeyev 1983, Warneck 1988, Thomas & Stamnes 1999, Tanaka & Wang 2004, Jin et al 2006, Platt et al 2007, Ota et al 2010 and the papers cited therein). The light reaching a measuring station at sea level thus consists of a flux of rays arriving directly from the Sun, albeit attenuated in the atmosphere, and a flux of light scattered in the atmosphere coming from all directions of the sky.…”

Section: The Inflow Of Solar Radiation Through the Atmosphere To The mentioning

confidence: 99%

Particulate organic carbon in the southern Baltic Sea: numerical simulations and experimental data

Dzierzbicka-Głowacka¹,

Kuliński²,

Maciejewska³

et al. 2010

OCEANOLOGIA

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The influx of solar radiation to the Baltic Sea and its penetration into its waters is described on the basis of selected results of optical and bio-optical studies in the Baltic published by various authors during the past ca 50 years. The variability in the natural irradiance of this sea is illustrated on time scales from short-term fluctuations occurring during a single day to differences in mean monthly values over a period of many years. Data on variability of the proportions between UV, * The paper was invited by the Chairman of the Polish National SCOR. The work was carried out within the framework of IO PAS's statutory research and also as part of the Satellite Monitoring of the Baltic Sea Environment project -SatBałtyk, co-founded by the European Union through European Regional Development Fund contract No. POIG 01.01.02-22-011/09.The complete text of the paper is available at http://www.iopan.gda.pl/oceanologia/ 534 J. Dera, B. Woźniak VIS and IR energy in the light reaching the sea surface are also discussed. Longterm monthly mean values of the incident solar radiation flux at the surface of the Baltic Proper are given; they were obtained from meteorological and solar radiation measurements and model approximations. The transmittances of these mean monthly radiation fluxes across the surface of the Baltic are given, as are the typical energy and spectral characteristics of the underwater irradiance, its attenuation with depth in the sea and the associated euphotic zone depths, as well as typical ranges of variability of these characteristics in different Baltic basins. Some of these characteristics are illustrated by typical empirical data. These mean values are not fully representative, however, because with the sole use of classical in situ measurement methods from on board research vessels in the Baltic, it has not been possible to gather a sufficiently representative set of empirical data that would adequately reflect the variability of the optical characteristics of all the basins of this sea. The article goes on to introduce the statistical model of vertical distributions of chlorophyll a concentration in the Baltic and the bio-optical model of Baltic Case 2 waters, the use of which contribute very significantly to this description of the optical characteristics and will enable this data set to be hugely expanded to include all the Baltic basins. This opportunity is presented by the optical parameterization of Baltic Case 2 waters, i.e. by the mathematical formulas of the model linking the coefficient of attenuation of downward irradiance with the surface chlorophyll a concentration, as well as the method developed for the efficient and systematic satellite remote sensing of the chlorophyll a concentration over the entire Baltic Sea area.

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Radiation and Optics in the Atmosphere

Cited by 11 publications

References 180 publications

Cavity-based absorption spectroscopy techniques

Cavity-based absorption spectroscopy techniques

Monte Carlo method for polarized radiative transfer in gradient-index media

Particulate organic carbon in the southern Baltic Sea: numerical simulations and experimental data

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