Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Tomi Raatikainen"'
Autor:
Kalle Nordling, Jukka-Pekka Keskinen, Sami Romakkaniemi, Harri Kokkola, Petri Räisänen, Antti Lipponen, Antti-Ilari Partanen, Jaakko Ahola, Juha Tonttila, Muzaffer Ege Alper, Hannele Korhonen, Tomi Raatikainen
Publikováno v:
eISSN
Here we present for the first time a proof of concept for an emulation-based method that uses a large-eddy simulations (LES) to present sub-grid cloud processes in a general circulation model (GCM). We focus on two key variables affecting the propert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::537f841b6ed9c05497c8f33160fe49dc
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-912/
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-912/
Autor:
Muzaffer Ege Alper, Jukka-Pekka Keskinen, Antti Lipponen, Hannele Korhonen, Petri Räisänen, Jaakko Ahola, Jia Liu, Antti Kukkurainen, Harri Kokkola, Kalle Nordling, Antti-Ilari Partanen, Sami Romakkaniemi, Juha Tonttila, Tomi Raatikainen
The number of cloud droplets formed at the cloud base depends both on the properties of aerosol particles and the updraft velocity of an air parcel at the cloud base. As the spatial scale of updrafts is too small to be resolved in global atmospheric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b1612d17fea87c6567b765093ecbf14
https://doi.org/10.5194/acp-2021-757
https://doi.org/10.5194/acp-2021-757
Publikováno v:
Atmospheric Chemistry and Physic
Shallow marine mixed-phase clouds are important for the Earth's radiative balance, but modelling their formation and dynamics is challenging. These clouds depend on boundary layer turbulence and cloud top radiative cooling, which is related to the cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ee57f352d41805410454837da856eae
https://acp.copernicus.org/preprints/acp-2021-537/
https://acp.copernicus.org/preprints/acp-2021-537/
Recent studies have shown that primary marine organics which are emitted as sea spray aerosol can be the main driver of ice nucleation in remote boundary layer clouds. Here we examine this by using a state-of-the-art large eddy simulator UCLALES-SALS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f3e07296c5eb8c1da5dc7d34957b8a6
https://doi.org/10.5194/egusphere-egu21-8694
https://doi.org/10.5194/egusphere-egu21-8694
Autor:
Ali Afzalifar, Sami Romakkaniemi, Harri Kokkola, Tomi Raatikainen, Hannele Korhonen, Juha Tonttila
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 1035-1048 (2021)
openaire: EC/H2020/646857/EU//ECLAIR acp-2019-1167 Artificial enhancement of precipitation via hygroscopic cloud seeding is investigated with a numerical large-eddy simulation model coupled with a spectral aerosol-cloud microphysics module. We focus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87b89d6f1d84d39b5650586c40c55a3b
https://aaltodoc.aalto.fi/handle/123456789/102761
https://aaltodoc.aalto.fi/handle/123456789/102761
We investigated the effect of inorganic semi-volatile compounds (SVC) HNO3 and NH3 on the cloud condensation nuclei (CCN) activity of aerosols and the subsequent changes in cloud properties. This was done by upgrading our state-of-the-art large eddy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ced4c5ecd257d14fda26946bf97682cb
https://acp.copernicus.org/preprints/acp-2020-851/
https://acp.copernicus.org/preprints/acp-2020-851/
Autor:
Hannele Korhonen, Harri Kokkola, Juha Tonttila, Tomi Raatikainen, Sami Romakkaniemi, Jaakko Ahola
Intentional release of large hygroscopic particles in a cloud, i.e. cloud seeding, is potentially capable of increasing rain formation. In this work, we focus on convective clouds of moderate intensity observed over the United Arab Emirates, where we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6488e4c98efa790cb9513bcf3604c02f
https://doi.org/10.5194/egusphere-egu2020-12065
https://doi.org/10.5194/egusphere-egu2020-12065
Autor:
Harri Kokkola, Hannele Korhonen, Tomi Raatikainen, Jaakko Ahola, Juha Tonttila, Sami Romakkaniemi
We have extended the large-eddy model UCLALES-SALSA (Tonttila et al., 2017) to include formation of ice and mixed-phase clouds. The model has exceptionally detailed aerosol description for both aerosol number and chemical composition. We confirmed th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c8e19012ec547ac130466d7ed8c7933
https://doi.org/10.5194/acp-2019-1182
https://doi.org/10.5194/acp-2019-1182