Zobrazeno 1 - 10
of 290
pro vyhledávání: '"P. Tiitta"'
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
Spectral dependence of birch and pine pollen optical properties using a synergy of lidar instruments
Autor:
M. Filioglou, A. Leskinen, V. Vakkari, E. O'Connor, M. Tuononen, P. Tuominen, S. Laukkanen, L. Toiviainen, A. Saarto, X. Shang, P. Tiitta, M. Komppula
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 9009-9021 (2023)
Active remote sensors equipped with the capability to detect polarization, a shape-relevant parameter, are essential to aerosol particle identification in the vertical domain. Most commonly, the linear particle depolarization ratio has been available
Externí odkaz:
https://doaj.org/article/b3583426272c4446bb20fa7c97f58055
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
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:
A. Hartikainen, P. Tiitta, M. Ihalainen, P. Yli-Pirilä, J. Orasche, H. Czech, M. Kortelainen, H. Lamberg, H. Suhonen, H. Koponen, L. Hao, R. Zimmermann, J. Jokiniemi, J. Tissari, O. Sippula
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 6357-6378 (2020)
Residential wood combustion (RWC) emits large amounts of gaseous and particulate organic aerosol (OA). In the atmosphere, the emission is transformed via oxidative reactions, which are under daylight conditions driven mainly by hydroxyl radicals (OH)
Externí odkaz:
https://doaj.org/article/3540df5c3e054be687affcfd05a11cb7
Autor:
K. E. Chiloane, J. P. Beukes, P. G. van Zyl, P. Maritz, V. Vakkari, M. Josipovic, A. D. Venter, K. Jaars, P. Tiitta, M. Kulmala, A. Wiedensohler, C. Liousse, G. V. Mkhatshwa, A. Ramandh, L. Laakso
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 10, Pp 6177-6196 (2017)
After carbon dioxide (CO2), aerosol black carbon (BC) is considered to be the second most important contributor to global warming. This paper presents equivalent black carbon (eBC) (derived from an optical absorption method) data collected from three
Externí odkaz:
https://doaj.org/article/2a5930b104734b2ea9d6db9362801fb5
Autor:
P. Tiitta, A. Leskinen, L. Hao, P. Yli-Pirilä, M. Kortelainen, J. Grigonyte, J. Tissari, H. Lamberg, A. Hartikainen, K. Kuuspalo, A.-M. Kortelainen, A. Virtanen, K. E. J. Lehtinen, M. Komppula, S. Pieber, A. S. H. Prévôt, T. B. Onasch, D. R. Worsnop, H. Czech, R. Zimmermann, J. Jokiniemi, O. Sippula
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 13251-13269 (2016)
Organic aerosols (OA) derived from small-scale wood combustion emissions are not well represented by current emissions inventories and models, although they contribute substantially to the atmospheric particulate matter (PM) levels. In this work,
Externí odkaz:
https://doaj.org/article/d7947fd7ea2e4a8bb9c0941c8bf7b99e
Autor:
E. Giannakaki, A. Pfüller, K. Korhonen, T. Mielonen, L. Laakso, V. Vakkari, H. Baars, R. Engelmann, J. P. Beukes, P. G. Van Zyl, M. Josipovic, P. Tiitta, K. Chiloane, S. Piketh, H. Lihavainen, K. E. J. Lehtinen, M. Komppula
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 10, Pp 5429-5442 (2015)
Raman lidar data obtained over a 1 year period has been analysed in relation to aerosol layers in the free troposphere over the Highveld in South Africa. In total, 375 layers were observed above the boundary layer during the period 30 January 2010 to
Externí odkaz:
https://doaj.org/article/0ed345620fcc4f4da8b741ec3afe7a27
Autor:
J. Backman, A. Virkkula, V. Vakkari, J. P. Beukes, P. G. Van Zyl, M. Josipovic, S. Piketh, P. Tiitta, K. Chiloane, T. Petäjä, M. Kulmala, L. Laakso
Publikováno v:
Atmospheric Measurement Techniques, Vol 7, Iss 12, Pp 4285-4298 (2014)
Absorption Ångström exponents (AAEs) calculated from filter-based absorption measurements are often used to give information on the origin of the ambient aerosol, for example, to distinguish between urban pollution and biomass burning aerosol. Filt
Externí odkaz:
https://doaj.org/article/05b415ae986f4702ad0404809f6e3ff2
Autor:
K. Tsigaridis, N. Daskalakis, M. Kanakidou, P. J. Adams, P. Artaxo, R. Bahadur, Y. Balkanski, S. E. Bauer, N. Bellouin, A. Benedetti, T. Bergman, T. K. Berntsen, J. P. Beukes, H. Bian, K. S. Carslaw, M. Chin, G. Curci, T. Diehl, R. C. Easter, S. J. Ghan, S. L. Gong, A. Hodzic, C. R. Hoyle, T. Iversen, S. Jathar, J. L. Jimenez, J. W. Kaiser, A. Kirkevåg, D. Koch, H. Kokkola, Y. H Lee, G. Lin, X. Liu, G. Luo, X. Ma, G. W. Mann, N. Mihalopoulos, J.-J. Morcrette, J.-F. Müller, G. Myhre, S. Myriokefalitakis, N. L. Ng, D. O'Donnell, J. E. Penner, L. Pozzoli, K. J. Pringle, L. M. Russell, M. Schulz, J. Sciare, Ø. Seland, D. T. Shindell, S. Sillman, R. B. Skeie, D. Spracklen, T. Stavrakou, S. D. Steenrod, T. Takemura, P. Tiitta, S. Tilmes, H. Tost, T. van Noije, P. G. van Zyl, K. von Salzen, F. Yu, Z. Wang, R. A. Zaveri, H. Zhang, K. Zhang, Q. Zhang, X. Zhang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 19, Pp 10845-10895 (2014)
This paper evaluates the current status of global modeling of the organic aerosol (OA) in the troposphere and analyzes the differences between models as well as between models and observations. Thirty-one global chemistry transport models (CTMs) and
Externí odkaz:
https://doaj.org/article/6b4dc766e0e34c96ad3b8a06255cfabb