Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
EPSC Abstracts
Vol.14, EPSC2020-312, 2020
https://doi.org/10.5194/epsc2020-312
Europlanet Science Congress 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Modelling the in situ solar and thermal radiation environment for future entry probe missions to Venus

Patrick Irwin1, Colin Wilson1, Juan Alday1, Maarten Roos-Serote2, Jo Barstow3, and Shahid Aslam4
Patrick Irwin et al.
  • 1University of Oxford, Atmospheric, Oceanic and Planetary Physics, Department of Physics, Oxford, UK (patrick.irwin@physics.ox.ac.uk)
  • 2Lightcurve Films
  • 3Open University, Milton Keynes, UK
  • 4NASA Goddard Space Flight Center, Greenbelt, USA

In this presentation we will describe recent work to model upward and downward fluxes of solar and thermal radiation in the atmosphere of Venus using the NEMESIS radiative transfer and retrieval tool (Irwin et al., JQSRT, 109, 1136, 2008). Using a plane-parallel matrix operator multiple-scattering model we simulate the internal 3D radiation field within Venus’ atmosphere and compare our simulations with the observations of the Pioneer Venus and Venera 13 and 14 entry probes. Such simulations allow us to assess the availability of sunlight and the visibility of the sun azimuth direction in the cloud layer for potential balloon missions, and also enables us to predict at what altitude the surface will become visible for probes descending on dayside. A reanalysis of the Venera 13 and 14 radiance spectra observations will be used to reassess earlier estimates of cloud structure and water vapour abundance. Such modelling also allows us to simulate the visible appearance of Venus’ atmosphere during the descent of a probe mission as will be shown.

How to cite: Irwin, P., Wilson, C., Alday, J., Roos-Serote, M., Barstow, J., and Aslam, S.: Modelling the in situ solar and thermal radiation environment for future entry probe missions to Venus, Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-312, https://doi.org/10.5194/epsc2020-312, 2020

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