Zobrazeno 1 - 10
of 2 860
pro vyhledávání: '"A. Keppens"'
Autor:
A. Keppens, S. Di Pede, D. Hubert, J.-C. Lambert, P. Veefkind, M. Sneep, J. De Haan, M. ter Linden, T. Leblanc, S. Compernolle, T. Verhoelst, J. Granville, O. Nath, A. M. Fjæraa, I. Boyd, S. Niemeijer, R. Van Malderen, H. G. J. Smit, V. Duflot, S. Godin-Beekmann, B. J. Johnson, W. Steinbrecht, D. W. Tarasick, D. E. Kollonige, R. M. Stauffer, A. M. Thompson, A. Dehn, C. Zehner
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 3969-3993 (2024)
The Sentinel-5 Precursor (S5P) satellite operated by the European Space Agency has carried the TROPOspheric Monitoring Instrument (TROPOMI) on a Sun-synchronous low-Earth orbit since 13 October 2017. The S5P mission has acquired more than 5 years of
Externí odkaz:
https://doaj.org/article/218218c251c342fa9984d6eeb6a6f168
Autor:
D. Hubert, K.-P. Heue, J.-C. Lambert, T. Verhoelst, M. Allaart, S. Compernolle, P. D. Cullis, A. Dehn, C. Félix, B. J. Johnson, A. Keppens, D. E. Kollonige, C. Lerot, D. Loyola, M. Maata, S. Mitro, M. Mohamad, A. Piters, F. Romahn, H. B. Selkirk, F. R. da Silva, R. M. Stauffer, A. M. Thompson, J. P. Veefkind, H. Vömel, J. C. Witte, C. Zehner
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 7405-7433 (2021)
Ozone in the troposphere affects humans and ecosystems as a pollutant and as a greenhouse gas. Observing, understanding and modelling this dual role, as well as monitoring effects of international regulations on air quality and climate change, howeve
Externí odkaz:
https://doaj.org/article/8b36420f14684dbbb7cb4fe2cac50185
Prominences and coronal rain are two forms of coronal condensations for which we still lack satisfactory details on the formation pathways and conditions under which the two come to exist. We compared prominences that formed via a steady versus stoch
Externí odkaz:
http://arxiv.org/abs/2406.02955
Autor:
Donné, Dion, Keppens, Rony
The mass cycle of solar prominences or filaments is still not completely understood. Researchers agree that these dense structures form by coronal in-situ condensations and plasma siphoning from the underlying chromosphere. In the evaporation-condens
Externí odkaz:
http://arxiv.org/abs/2405.20048
To expand on recent work, we introduce collisional terms in the analysis of the warm ion-electron, two-fluid equations for a homogeneous plasma at rest. Consequently, the plasma is now described by six variables: the magnetisation, the ratio of masse
Externí odkaz:
http://arxiv.org/abs/2405.11565
The formation of the MFRs in the pre-flare stage, and how this leads to coronal rain in a post-eruption magnetic loop is not fully understood. We explore the formation, and eruption of MFRs, followed by the appearance of coronal rain in the post-flar
Externí odkaz:
http://arxiv.org/abs/2405.10688
Turbulent states are ubiquitous in plasmas and the understanding of turbulence is fundamental in modern astrophysics. Numerical simulations, which are the state-of-the-art approach to the study of turbulence, require substantial computing resources.
Externí odkaz:
http://arxiv.org/abs/2405.09587
Autor:
S. Compernolle, A. Argyrouli, R. Lutz, M. Sneep, J.-C. Lambert, A. M. Fjæraa, D. Hubert, A. Keppens, D. Loyola, E. O'Connor, F. Romahn, P. Stammes, T. Verhoelst, P. Wang
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 2451-2476 (2021)
Accurate knowledge of cloud properties is essential to the measurement of atmospheric composition from space. In this work we assess the quality of the cloud data from three Copernicus Sentinel-5 Precursor (S5P) TROPOMI cloud products: (i) S5P OCRA/R
Externí odkaz:
https://doaj.org/article/02b9a7f560db4f4a8aa117b808f30edf
Autor:
T. von Clarmann, D. A. Degenstein, N. J. Livesey, S. Bender, A. Braverman, A. Butz, S. Compernolle, R. Damadeo, S. Dueck, P. Eriksson, B. Funke, M. C. Johnson, Y. Kasai, A. Keppens, A. Kleinert, N. A. Kramarova, A. Laeng, B. Langerock, V. H. Payne, A. Rozanov, T. O. Sato, M. Schneider, P. Sheese, V. Sofieva, G. P. Stiller, C. von Savigny, D. Zawada
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 4393-4436 (2020)
Remote sensing of atmospheric state variables typically relies on the inverse solution of the radiative transfer equation. An adequately characterized retrieval provides information on the uncertainties of the estimated state variables as well as on
Externí odkaz:
https://doaj.org/article/0bb8d003aa8c4d81944245a2b2782ca9
Large-scale coronal plasma evolutions can be adequately described by magnetohydrodynamics (MHD) equations. However, full multi-dimensional MHD simulations require substantial computational resources. Given the low plasma $\beta$ in the solar corona,
Externí odkaz:
http://arxiv.org/abs/2404.17056