Zobrazeno 1 - 10
of 61
pro vyhledávání: '"J. Tonttila"'
Autor:
J. Kesti, E. J. O'Connor, A. Hirsikko, J. Backman, M. Filioglou, A.-M. Sundström, J. Tonttila, H. Lihavainen, H. Korhonen, E. Asmi
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 9369-9386 (2024)
The optical, physical, and chemical properties of aerosol particles have been previously studied in the United Arab Emirates (UAE), but there is still a gap in the knowledge of particle sources and in the horizontal and vertical transport of aerosol
Externí odkaz:
https://doaj.org/article/790db272ea1a47278dbaabaed9ddaf02
Autor:
A. Baró Pérez, M. S. Diamond, F. A.-M. Bender, A. Devasthale, M. Schwarz, J. Savre, J. Tonttila, H. Kokkola, H. Lee, D. Painemal, A. M. L. Ekman
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 4591-4610 (2024)
Biomass burning plumes are frequently transported over the southeast Atlantic (SEA) stratocumulus deck during the southern African fire season (June–October). The plumes bring large amounts of absorbing aerosols and enhanced moisture, which can tri
Externí odkaz:
https://doaj.org/article/56b6843c56904d9ca2e68bcf1c6b0be8
Autor:
K. Nordling, J.-P. Keskinen, S. Romakkaniemi, H. Kokkola, P. Räisänen, A. Lipponen, A.-I. Partanen, J. Ahola, J. Tonttila, M. E. Alper, H. Korhonen, T. Raatikainen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 869-890 (2024)
Here we present for the first time a proof of concept for an emulation-based method that uses a large-eddy simulations (LESs) to present sub-grid cloud processes in a general circulation model (GCM). We focus on two key variables affecting the proper
Externí odkaz:
https://doaj.org/article/7301e19e385047059fe72016b820a8cc
Autor:
S. M. Calderón, J. Tonttila, A. Buchholz, J. Joutsensaari, M. Komppula, A. Leskinen, L. Hao, D. Moisseev, I. Pullinen, P. Tiitta, J. Xu, A. Virtanen, H. Kokkola, S. Romakkaniemi
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 12417-12441 (2022)
We carried out a closure study of aerosol–cloud interactions during stratocumulus formation using a large eddy simulation model UCLALES–SALSA (University of California Los Angeles large eddy simulation model–sectional aerosol module for large a
Externí odkaz:
https://doaj.org/article/65719a23c134473fa18be02231a61b83
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 10971-10992 (2022)
The goal of this study is to investigate the role of organic aerosols emitted with sea spray or formed from marine gas phase emissions of volatile organic compounds (VOCs) in influencing the stability of stratiform marine clouds. We aim to point out
Externí odkaz:
https://doaj.org/article/63ead2e697f64e5caf147d315f9678e1
Autor:
J. Ahola, T. Raatikainen, M. E. Alper, J.-P. Keskinen, H. Kokkola, A. Kukkurainen, A. Lipponen, J. Liu, K. Nordling, A.-I. Partanen, S. Romakkaniemi, P. Räisänen, J. Tonttila, H. Korhonen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 4523-4537 (2022)
The number of cloud droplets formed at the cloud base depends on both 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://doaj.org/article/367822ddbbd1476ba2210a8b53a44caf
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 2937-2953 (2022)
Beijing suffers from poor air quality, particularly during wintertime haze episodes when concentrations of PM2.5 (particulate matter with a diameter < 2.5 µm) can peak at > 400 µg m−3. Black carbon (BC), an aerosol which strongly absorbs solar ra
Externí odkaz:
https://doaj.org/article/6d1761995b60438cb1c1be5d10a44af0
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 3763-3778 (2022)
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://doaj.org/article/5c9fa818f6364f5396ab85aa8cd0bdde
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 1035-1048 (2021)
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 our investigation on marine stratocumulus clouds
Externí odkaz:
https://doaj.org/article/7a8b9aed45254a8f80e22fa66578a721
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 11893-11906 (2020)
The aerosol–radiation–meteorology feedback loop is the process by which aerosols interact with solar radiation to influence boundary layer meteorology. Through this feedback, aerosols cause cooling of the surface, resulting in reduced buoyant tur
Externí odkaz:
https://doaj.org/article/e6b8ae2f76cc41f295c0d776d7555433