Modelling radiation quantities and photolysis frequencies in the troposphere

Ruggaber, A.; Dlugi, R.; Nakajima, Teruyuki

doi:10.1007/bf00696813

Cited by 241 publications

(162 citation statements)

References 25 publications

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“…Clear-sky spectral irradiances were calculated using a radiative transfer model (Ruggaber et al 1994) for 40ЊN at summer solstice, under different ozone conditions (concentration in Dobson Units [100 DU ϭ 1 mm O 3 at STP]). The BWF-based estimates of photosynthesis were determined from Eqs.…”

Section: Predicted Photosynthesis Under Different Uv Conditions-mentioning

confidence: 99%

Increased sensitivity to ultraviolet radiation in nitrogen‐limited dinoflagellates: Photoprotection and repair

Litchman

Neale

Banaszak

2002

Limnology & Oceanography

198

173

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Nitrogen (N) limitation significantly increased the sensitivity of photosynthesis to inhibition by ultraviolet radiation (UV) in two estuarine dinoflagellates, Akashiwo sanguinea (ϭ Gymnodinium sanguineum) and Gymnodinium (ϭ Gyrodinium) cf. instriatum. Biological weighting functions (BWFs) and the kinetics of photosynthetic response to UV indicated that the main mechanism for the increase in sensitivity was less efficient repair. A decrease in cell size and in the concentration of the photoprotective mycosporine-like amino acids also elevated sensitivity. The BWFs predict that increased UV-B due to ozone depletion would cause a more than 1.5-fold greater additional inhibition of N-limited compared to nutrient-sufficient dinoflagellates. The BWFs of the N-limited cultures are similar to those measured for natural assemblages of phytoplankton in the Chesapeake Bay under low N availability.

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Section: Predicted Photosynthesis Under Different Uv Conditions-mentioning

confidence: 99%

Increased sensitivity to ultraviolet radiation in nitrogen‐limited dinoflagellates: Photoprotection and repair

Litchman

Neale

Banaszak

2002

Limnology & Oceanography

198

173

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“…Figure 6 shows the photolytic lifetime qJHONO of HONO calculated with our absorption cross-section spectrum as a function of solar zenith angle. The actinic fluxes used to derive qrHONO were calculated for a standard atmosphere, cloudless sky, and the albedo of concrete (-0.2), as can be found in a city, with the system for transfer of atmospheric radiation model [Ruggaber et al, 1994]. The lifetime at midlatitudes at noon is around 20 -30 min.…”

Section: Implications For Doas Measurementsmentioning

confidence: 99%

UV‐visible absorption cross sections of nitrous acid

Stutz¹,

Kim²,

Platt³

et al. 2000

J. Geophys. Res.

221

169

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“…Correspondence to: F. C. Seidel (felix.seidel@geo.uzh.ch) 6S (Second Simulation of a Satellite Signal in the Solar Spectrum) (Vermote et al, 1997), SCIATRAN , SHARM (Muldashev et al, 1999;Lyapustin, 2005), RT3 (Evans and Stephens, 1991), RTMOM (Govaerts, 2006), RAY (Zege and Chaikovskaya, 1996), STAR (Ruggaber et al, 1994) and Pstar2 (Nakajima and Tanaka, 1986;Ota et al, 2010), as well as DISORT (Stamnes et al, 1988), which is used in MODTRAN (Berk et al, 1989), STREAMER (Key and Schweiger, 1998) and SBDART (Ricchiazzi et al, 1998). These accurate but complex RTMs are frequently run in a forward mode, generating look-up tables (LUTs), which are later used during the inversion process for atmospheric compensation (Gao et al, 2009) or aerosol retrieval (Kokhanovsky, 2008;Kokhanovsky and Leeuw, 2009;Kokhanovsky et al, 2010), for instance.…”

Section: Introductionmentioning

confidence: 99%

Fast and simple model for atmospheric radiative transfer

2010

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Abstract. Radiative transfer models (RTMs) are of utmost importance for quantitative remote sensing, especially for compensating atmospheric perturbation. A persistent tradeoff exists between approaches that prefer accuracy at the cost of computational complexity, versus those favouring simplicity at the cost of reduced accuracy. We propose an approach in the latter category, using analytical equations, parameterizations and a correction factor to efficiently estimate the effect of molecular multiple scattering. We discuss the approximations together with an analysis of the resulting performance and accuracy. The proposed Simple Model for Atmospheric Radiative Transfer (SMART) decreases the calculation time by a factor of more than 25 in comparison to the benchmark RTM 6S on the same infrastructure. The relative difference between SMART and 6S is about 5% for spaceborne and about 10% for airborne computations of the atmospheric reflectance function. The combination of a large solar zenith angle (SZA) with high aerosol optical depth (AOD) at low wavelengths lead to relative differences of up to 15%. SMART can be used to simulate the hemispherical conical reflectance factor (HCRF) for spaceborne and airborne sensors, as well as for the retrieval of columnar AOD.

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Modelling radiation quantities and photolysis frequencies in the troposphere

Cited by 241 publications

References 25 publications

Increased sensitivity to ultraviolet radiation in nitrogen‐limited dinoflagellates: Photoprotection and repair

Increased sensitivity to ultraviolet radiation in nitrogen‐limited dinoflagellates: Photoprotection and repair

UV‐visible absorption cross sections of nitrous acid

Fast and simple model for atmospheric radiative transfer

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