Zobrazeno 1 - 10
of 146
pro vyhledávání: '"V. Aaltonen"'
Autor:
M. Aun, K. Lakkala, R. Sanchez, E. Asmi, F. Nollas, O. Meinander, L. Sogacheva, V. De Bock, A. Arola, G. de Leeuw, V. Aaltonen, D. Bolsée, K. Cizkova, A. Mangold, L. Metelka, E. Jakobson, T. Svendby, D. Gillotay, B. Van Opstal
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 6037-6054 (2020)
In March 2017, measurements of downward global irradiance of ultraviolet (UV) radiation were started with a multichannel GUV-2511 radiometer in Marambio, Antarctica (64.23∘ S; 56.62∘ W), by the Finnish Meteorological Institute (FMI) in collab
Externí odkaz:
https://doaj.org/article/a89e85c12e3e459b883b69d73ccc6c8f
Autor:
K. Lakkala, M. Aun, R. Sanchez, G. Bernhard, E. Asmi, O. Meinander, F. Nollas, G. Hülsen, T. Karppinen, V. Aaltonen, A. Arola, G. de Leeuw
Publikováno v:
Earth System Science Data, Vol 12, Pp 947-960 (2020)
A ground-based ultraviolet (GUV) multi-filter radiometer was set up at Marambio, 64∘ S, 56∘ W, Antarctica, in 2017. The instrument continuously measures ultraviolet (UV) radiation, visible (VIS) radiation and photosynthetically active radiati
Externí odkaz:
https://doaj.org/article/58522e7f021b442b938b1da8f811105d
Autor:
P. Zieger, P. P. Aalto, V. Aaltonen, M. Äijälä, J. Backman, J. Hong, M. Komppula, R. Krejci, M. Laborde, J. Lampilahti, G. de Leeuw, A. Pfüller, B. Rosati, M. Tesche, P. Tunved, R. Väänänen, T. Petäjä
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 13, Pp 7247-7267 (2015)
Ambient aerosol particles can take up water and thus change their optical properties depending on the hygroscopicity and the relative humidity (RH) of the surrounding air. Knowledge of the hygroscopicity effect is of crucial importance for radiative
Externí odkaz:
https://doaj.org/article/07964d63624042a39f86fcccff4a0666
Autor:
A. Hirsikko, E. J. O'Connor, M. Komppula, K. Korhonen, A. Pfüller, E. Giannakaki, C. R. Wood, M. Bauer-Pfundstein, A. Poikonen, T. Karppinen, H. Lonka, M. Kurri, J. Heinonen, D. Moisseev, E. Asmi, V. Aaltonen, A. Nordbo, E. Rodriguez, H. Lihavainen, A. Laaksonen, K. E. J. Lehtinen, T. Laurila, T. Petäjä, M. Kulmala, Y. Viisanen
Publikováno v:
Atmospheric Measurement Techniques, Vol 7, Iss 5, Pp 1351-1375 (2014)
The Finnish Meteorological Institute, in collaboration with the University of Helsinki, has established a new ground-based remote-sensing network in Finland. The network consists of five topographically, ecologically and climatically different sites
Externí odkaz:
https://doaj.org/article/c0ce83f4219c4223a525442393782413
Autor:
A. Virkkula, J. Levula, T. Pohja, P. P. Aalto, P. Keronen, S. Schobesberger, C. B. Clements, L. Pirjola, A.-J. Kieloaho, L. Kulmala, H. Aaltonen, J. Patokoski, J. Pumpanen, J. Rinne, T. Ruuskanen, M. Pihlatie, H. E. Manninen, V. Aaltonen, H. Junninen, T. Petäjä, J. Backman, M. Dal Maso, T. Nieminen, T. Olsson, T. Grönholm, J. Aalto, T. H. Virtanen, M. Kajos, V.-M. Kerminen, D. M. Schultz, J. Kukkonen, M. Sofiev, G. De Leeuw, J. Bäck, P. Hari, M. Kulmala
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 9, Pp 4473-4502 (2014)
A prescribed fire experiment was conducted on 26 June 2009 in Hyytiälä, Finland, to study aerosol and trace gas emissions from prescribed fires of slash fuels and the effects of fire on soil properties in a controlled environment. A 0.8 ha forest n
Externí odkaz:
https://doaj.org/article/30c883beace34a298142c40f335bc2c2
Spectral albedo of seasonal snow during intensive melt period at Sodankylä, beyond the Arctic Circle
Autor:
O. Meinander, S. Kazadzis, A. Arola, A. Riihelä, P. Räisänen, R. Kivi, A. Kontu, R. Kouznetsov, M. Sofiev, J. Svensson, H. Suokanerva, V. Aaltonen, T. Manninen, J.-L. Roujean, O. Hautecoeur
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 7, Pp 3793-3810 (2013)
We have measured spectral albedo, as well as ancillary parameters, of seasonal European Arctic snow at Sodankylä, Finland (67°22' N, 26°39' E). The springtime intensive melt period was observed during the Snow Reflectance Transition Experiment (SN
Externí odkaz:
https://doaj.org/article/0d67b7829f9c485591980dfcf3c04375
Autor:
T. Mielonen, R. C. Levy, V. Aaltonen, M. Komppula, G. de Leeuw, J. Huttunen, H. Lihavainen, P. Kolmonen, K. E. J. Lehtinen, A. Arola
Publikováno v:
Atmospheric Measurement Techniques, Vol 4, Iss 2, Pp 201-214 (2011)
Aerosol Optical Depth (AOD) and Ångström exponent (AE) values derived with the MODIS retrieval algorithm over land (Collection 5) are compared with ground based sun photometer measurements at eleven sites spanning the globe. Although, in general, t
Externí odkaz:
https://doaj.org/article/ae10618921104050a845647c1596e0d5
Autor:
C. Lund Myhre, C. Toledano, G. Myhre, K. Stebel, K. E. Yttri, V. Aaltonen, M. Johnsrud, M. Frioud, V. Cachorro, A. de Frutos, H. Lihavainen, J. R. Campbell, A. P. Chaikovsky, M. Shiobara, E. J. Welton, K. Tørseth
Publikováno v:
Atmospheric Chemistry and Physics, Vol 7, Iss 22, Pp 5899-5915 (2007)
In spring 2006 a special meteorological situation occurred in the European Arctic region giving record high levels of air pollution. The synoptic situation resulted in extensive transport of pollution predominantly from agricultural fires in Eastern
Externí odkaz:
https://doaj.org/article/15d6ba2b1cb24fceaca5cfc0828984a3
Autor:
V. Aaltonen, H. Lihavainen, V.-M. Kerminen, M. Komppula, J. Hatakka, K. Eneroth, M. Kulmala, Y. Viisanen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 6, Iss 5, Pp 1155-1164 (2006)
Three years of continuous measurements of aerosol optical properties and simultaneous aerosol number size distribution measurements at Pallas GAW station, a remote subarctic site in the northern border of the boreal forest zone, have been analysed. T
Externí odkaz:
https://doaj.org/article/ccf5fa85ab1e4cc3996c4f45fda4c887
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