Zobrazeno 1 - 10
of 151
pro vyhledávání: '"S. Romakkaniemi"'
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. Kommula, A. Buchholz, Y. Gramlich, T. Mielonen, L. Hao, I. Pullinen, L. Vettikkat, A. Ylisirniö, J. Joutsensaari, S. Schobesberger, P. Tiitta, A. Leskinen, D. Hesslin‐ Rees, S. L. Haslett, K. Siegel, C. Lunder, P. Zieger, R. Krejci, S. Romakkaniemi, C. Mohr, A. Virtanen
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 6, Pp n/a-n/a (2024)
Abstract Active vegetation fires in south‐eastern (SE) Europe resulted in a notable increase in the number concentration of aerosols and cloud condensation nuclei (CCN) particles at two high latitude locations—the SMEAR IV station in Kuopio, Finl
Externí odkaz:
https://doaj.org/article/3b4cc174207d42df884cb6a98af1e561
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:
P. Tiitta, A. Leskinen, V. A. Kaikkonen, E. O. Molkoselkä, A. J. Mäkynen, J. Joutsensaari, S. Calderon, S. Romakkaniemi, M. Komppula
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 2993-3009 (2022)
Upon a new measurement technique, it is possible to sharpen the determination of microphysical properties of cloud droplets using high resolving power imaging. The shape, size, and position of each particle inside a well-defined, three-dimensional sa
Externí odkaz:
https://doaj.org/article/32ee0422782b41b6b6202821b91b32a6
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
Autor:
I. Boutle, W. Angevine, J.-W. Bao, T. Bergot, R. Bhattacharya, A. Bott, L. Ducongé, R. Forbes, T. Goecke, E. Grell, A. Hill, A. L. Igel, I. Kudzotsa, C. Lac, B. Maronga, S. Romakkaniemi, J. Schmidli, J. Schwenkel, G.-J. Steeneveld, B. Vié
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 319-333 (2022)
An intercomparison between 10 single-column (SCM) and 5 large-eddy simulation (LES) models is presented for a radiation fog case study inspired by the Local and Non-local Fog Experiment (LANFEX) field campaign. Seven of the SCMs represent single-colu
Externí odkaz:
https://doaj.org/article/d945590032bd44e3bedfc6072350c44a
Autor:
A. Ruuskanen, S. Romakkaniemi, H. Kokkola, A. Arola, S. Mikkonen, H. Portin, A. Virtanen, K. E. J. Lehtinen, M. Komppula, A. Leskinen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 1683-1695 (2021)
Long-term statistics of atmospheric aerosol and especially cloud scavenging were studied at the Puijo measurement station in Kuopio, Finland, during October 2010–November 2014. Aerosol size distributions, scattering coefficients at three different
Externí odkaz:
https://doaj.org/article/70edb086851740498b06df43602cba4e