Theoretical Models of the Non-Polarized Optical Radiation in the Atmosphere-Surface System

Kondratyev, K. Ya.; Kozoderov, V. V.; Smokty, Oleg I.

doi:10.1007/978-3-642-76747-0_4

Cited by 5 publications

(4 citation statements)

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“…In fact, atmospheric water vapor is known to be the most dominant greenhouse gas in the Earth's atmosphere [Marsden and Valero, 2004], exerting a strong influence on the radiation balance of the surface-atmosphere system, due to its intense absorption of short-wave (solar) and long-wave (terrestrial) radiation [Yamanouchi and Charlok, 1995]. The former process is caused by the numerous absorption bands distributed throughout the 0.6 Ä 3.7 mm wavelength range of the solar spectrum [Kondratyev, 1969;Leckner, 1978], whereas the latter takes place substantially through two distinct absorption mechanisms: (1) selective absorption, mainly produced by the vibrorotational band centered at 6.25 mm wavelength and the rotational bands beyond 16 mm [Goody, 1964], and (2) continuum absorption, induced by both foreign and self-broadening mechanisms of the lines belonging to the absorption bands of water vapor and its dimer molecules in the middle and far infrared [Bignell, 1970;Clough et al, 1989].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months

et al. 2006

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[1] Two sets of radiosounding measurements were taken at Dome C (Antarctica) in December 2003 and January 2003, using RS80-A, RS80-H, and RS90 Vaisala radiosondes, and from March to May 2005, employing the RS92 model. They were examined following accurate correction procedures to remove the main relative humidity dry bias and the temperature and humidity lag errors. The results showed that a strong cooling usually characterizes the thermal conditions of the whole troposphere from December/January to April/May, with an average temperature decrease from 245 to 220 K at the ground, of around 10 K at upper tropospheric levels, and of more than 15 K in the lower stratosphere. The relative humidity data were found to be affected by dry bias of 5-10%, on average, for the RS80-A and RS80-H Humicap sensors and by smaller percentages for the other sensors. The mean monthly vertical profiles of absolute humidity were found to decrease sharply throughout the troposphere, especially within the first 3 km, and to diminish considerably passing from December/January to March/April/ May, with average values of precipitable water decreasing from 0.75 to 0.28 mm, median values from 0.69 to 0.25 mm, and first and third quartiles from 0.60 to 0.22 mm and from 0.87 to 0.34 mm, respectively. The results demonstrate that Dome C (where a permanent scientific station has been open for winter operations since austral winter 2005) is a site of comparable quality to the South Pole for both validation of satellite radiance measurements and astronomic observations in the infrared, submillimetric, and millimetric wavelength range, performed with large telescopes that cannot be carried on satellites.Citation: Tomasi, C., et al. (2006), Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months,

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Section: Introductionmentioning

confidence: 99%

Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months

et al. 2006

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“…The relationship of the angle of incidence for a surface inclined and oriented in any direction with the local meridian is trigonometric (see Berod and Bock [44], Kondratyev [45], and Coffari [46]) and can be described with Equations ( 17) or (18). cos θ = (sen φ cos β − cos φsen β cos γ)sen δ +(cos φ cos β + senφsen β cos γ) cos δ cos ω + cos δsenβsen γ sen ω…”

Section: − Modeling the Angle Of Incidence For An Inclined Solar Pane...mentioning

confidence: 99%

Estimation of the Hourly Global Solar Irradiation on the Tilted and Oriented Plane of Photovoltaic Solar Panels Applied to Greenhouse Production

et al. 2021

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Agrometeorological stations have horizontal solar irradiation data available, but the design and simulation of photovoltaic (PV) systems require data about the solar panel (inclined and/or oriented). Greenhouses for agricultural production, outside the large protected production areas, are usually off-grid; thus, the solar irradiation variable on the panel plane is critical for an optimal PV design. Modeling of solar radiation components (beam, diffuse, and ground-reflected) is carried out by calculating the extraterrestrial solar radiation, solar height, angle of incidence, and diffuse solar radiation. In this study, the modeling was done using Simulink-MATLAB blocks to facilitate its application, using the day of the year, the time of day, and the hourly horizontal global solar irradiation as input variables. The rest of the parameters (i.e., inclination, orientation, solar constant, albedo, latitude, and longitude) were fixed in each block. The results obtained using anisotropic models of diffuse solar irradiation of the sky in the region of Castile and León (Spain) showed improvements over the results obtained with isotropic models. This work enables the precise estimation of solar irradiation on a solar panel flexibly, for particular places, and with the best models for each of the components of solar radiation.

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“…As such, parametric models for estimating longwave irradiance during clear‐sky conditions (henceforth LW 0↓ ) often rely on screen‐level measurements of temperature and humidity (Flerchinger et al., 2009). Under cloudy or “all‐sky” (AS) conditions, however, cloud water droplets and ice crystals represent additional emitters that complicate LW ↓ estimation and typically serve to increase LW ↓ over LW 0↓ (Arking, 1991; Kondratyev, 1969; Yamanouchi & Kawaguchi, 1984). Various models have been proposed to correct for this increase by incorporating cloud covered area fraction ( f c ) or cloudiness proxies based on the clearness index (i.e., SW ↓ /SW ↓,TOA ) or fractional clear‐sky solar irradiance (i.e., SW ↓ /SW 0,↓ ; see the review by Flerchinger et al.…”

Section: Introductionmentioning

confidence: 99%

A Cloud‐Free Approach to Modeling Daily Downwelling Longwave Irradiance at Global Scale

Bright

Eisner

2023

Geophysical Research Letters

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Parametric modeling of downwelling longwave irradiance under all‐sky conditions (LW↓) typically involves “correcting” a clear‐ (or non‐overcast) sky model estimate using solar‐irradiance‐based proxies of cloud cover in lieu of actual cloud cover given uncertainties and measurement challenges of the latter. While such approaches are deemed sound, their application in time and space is inherently limited. We report on a correction model free of solar irradiance‐derived cloud proxies that is applicable at the true daily (24 hr) and global scales. The new “cloud‐free” correction model demonstrates superior performance in a range of environments relative to existing cloud‐free modeling approaches and to corrections based on solar‐derived cloudiness proxies. Literature‐based performance benchmarking indicates a performance that is often comparable to—and in some cases superior to—performances yielded by conventional parametric modeling approaches employing locally or regionally calibrated parameters, as well as to performances of satellite‐based algorithms.

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Theoretical Models of the Non-Polarized Optical Radiation in the Atmosphere-Surface System

Cited by 5 publications

References 0 publications

Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months

Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months

Estimation of the Hourly Global Solar Irradiation on the Tilted and Oriented Plane of Photovoltaic Solar Panels Applied to Greenhouse Production

A Cloud‐Free Approach to Modeling Daily Downwelling Longwave Irradiance at Global Scale

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