Coupled Nonequilibrium Flowfield–Radiative Transfer Calculation Behind a Shock Wave

2013 ◽  
Vol 27 (3) ◽  
pp. 404-413 ◽  
Author(s):  
Bruno Lopez ◽  
Marie Yvonne Perrin ◽  
Philippe Rivière ◽  
Anouar Soufiani
Keyword(s):  
Shock Wave ◽  
Radiative Transfer ◽  
Radiative Transfer Calculation

Coupled Nonequilibrium Flowfield–Radiative Transfer Calculation Behind a Shock Wave

2014 ◽  
Vol 28 (2) ◽  
pp. 364-364
Author(s):  
Bruno Lopez ◽  
Marie Yvonne Perrin ◽  
Philippe Rivière ◽  
Anouar Soufiani
Keyword(s):  
Shock Wave ◽  
Radiative Transfer ◽  
Radiative Transfer Calculation

scholarly journals The effect of using limited scene-dependent averaging kernels approximations for the implementation of fast Observing System Simulation Experiments targeted on lower tropospheric ozone

2013 ◽  
Vol 6 (2) ◽  
pp. 2413-2448 ◽  
Author(s):  
P. Sellitto ◽  
G. Dufour ◽  
M. Eremenko ◽  
J. Cuesta ◽  
V.-H. Peuch ◽  
...  
Keyword(s):  
Radiative Transfer ◽  
Tropospheric Ozone ◽  
System Simulation ◽  
Ozone Pollution ◽  
Simulation Experiments ◽  
Atmospheric Species ◽  
Radiative Transfer Calculation ◽  
Pollution Event ◽  
Pollution Events ◽  
Simulation Exercises

Abstract. Practical implementations of chemical OSSEs (Observing System Simulation Experiments) usually rely on approximations of the pseudo-observations by means of a prior parametrization of the averaging kernels, which describe the sensitivity of the observing systems to the target atmospheric species. This is intended to avoid the need for use of a computationally expensive pseudo-observations simulator that relies on full radiative transfer calculations. Here we present an investigation on how no, or limited, scene dependent averaging kernels parametrizations may misrepresent the sensitivity of an observing system, and thus possibly lead to inaccurate results of OSSEs. We carried out the full radiative transfer calculation for a three-days period over Europe, to produce reference pseudo-observations of lower tropospheric ozone, as they would be observed by a concept geostationary observing system called MAGEAQ (Monitoring the Atmosphere from Geostationary orbit for European Air Quality). The selected spatiotemporal interval is characterized by a peculiar ozone pollution event. We then compared our reference with approximated pseudo-observations, following existing simulation exercises made for both the MAGEAQ and GEOstationary Coastal and Air Pollution Events (GEO-CAPE) missions. We found that approximated averaging kernels may fail to replicate the variability of the full radiative transfer calculations. Then, we compared the full radiative transfer and the approximated pseudo-observations during a pollution event. We found that the approximations substantially overestimate the capability of the MAGEAQ to follow the spatiotemporal variations of the lower tropospheric ozone in selected areas. We conclude that such approximations may lead to false conclusions if used in an OSSE. Thus, we recommend to use comprehensive scene-dependent approximations of the averaging kernels, in cases where the full radiative transfer is computationally too costly for the OSSE being investigated.

scholarly journals An improvement in fast radiative transfer calculation of FengYun satellite by Planck weighting correction

2014 ◽  
Vol 63 (17) ◽  
pp. 179503
Author(s):  
Ma Gang ◽  
Zhang Peng ◽  
Qi Cheng-Li ◽  
Xu Na ◽  
Dong Chao-Hua
Keyword(s):  
Radiative Transfer ◽  
Radiative Transfer Calculation

scholarly journals The Palaeoclimate and Terrestrial Exoplanet Radiative Transfer Model Intercomparison Project (PALAEOTRIP): experimental design and protocols

2017 ◽  
Vol 10 (11) ◽  
pp. 3931-3940 ◽  
Author(s):  
Colin Goldblatt ◽  
Lucas Kavanagh ◽  
Maura Dewey
Keyword(s):  
Radiative Transfer ◽  
Ad Hoc ◽  
Climate Science ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Climate Modelling ◽  
Atmospheric Conditions ◽  
Model Intercomparison ◽  
Radiative Transfer Calculation ◽  
Intercomparison Project

Abstract. Accurate radiative transfer calculation is fundamental to all climate modelling. For deep palaeoclimate, and increasingly terrestrial exoplanet climate science, this brings both the joy and the challenge of exotic atmospheric compositions. The challenge here is that most standard radiation codes for climate modelling have been developed for modern atmospheric conditions and may perform poorly away from these. The palaeoclimate or exoclimate modeller must either rely on these or use bespoke radiation codes, and in both cases rely on either blind faith or ad hoc testing of the code. In this paper, we describe the protocols for the Palaeoclimate and Terrestrial Exoplanet Radiative Transfer Model Intercomparison Project (PALAEOTRIP) to systematically address this. This will compare as many radiation codes used for palaeoclimate or exoplanets as possible, with the aim of identifying the ranges of far-from-modern atmospheric compositions in which the codes perform well. This paper describes the experimental protocol and invites community participation in the project through 2017–2018.

scholarly journals Improvements of radiative transfer calculation for SF6thermal plasmas

2011 ◽  
Vol 44 (19) ◽  
pp. 194012 ◽  
Author(s):  
H Z Randrianandraina ◽  
Y Cressault ◽  
A Gleizes
Keyword(s):  
Radiative Transfer ◽  
Radiative Transfer Calculation
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