Zobrazeno 1 - 10
of 112
pro vyhledávání: '"A. V. Lindfors"'
Autor:
K. Lakkala, J. Kujanpää, C. Brogniez, N. Henriot, A. Arola, M. Aun, F. Auriol, A. F. Bais, G. Bernhard, V. De Bock, M. Catalfamo, C. Deroo, H. Diémoz, L. Egli, J.-B. Forestier, I. Fountoulakis, K. Garane, R. D. Garcia, J. Gröbner, S. Hassinen, A. Heikkilä, S. Henderson, G. Hülsen, B. Johnsen, N. Kalakoski, A. Karanikolas, T. Karppinen, K. Lamy, S. F. León-Luis, A. V. Lindfors, J.-M. Metzger, F. Minvielle, H. B. Muskatel, T. Portafaix, A. Redondas, R. Sanchez, A. M. Siani, T. Svendby, J. Tamminen
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 6999-7024 (2020)
The TROPOspheric Monitoring Instrument (TROPOMI) onboard the Sentinel-5 Precursor (S5P) satellite was launched on 13 October 2017 to provide the atmospheric composition for atmosphere and climate research. The S5P is a Sun-synchronous polar-orbiting
Externí odkaz:
https://doaj.org/article/12cba6b4e567461998a5ec1839a9cc5c
Autor:
L. Rontu, A. V. Lindfors
Publikováno v:
Advances in Science and Research, Vol 15, Pp 81-90 (2018)
Downwelling shortwave radiation at the surface (SWDS, global solar radiation flux), given by three different parametrization schemes, was compared to observations in the HARMONIE–AROME numerical weather prediction (NWP) model experiments over Fi
Externí odkaz:
https://doaj.org/article/7316593ebe8c4b3bac71eccd428a18c5
Autor:
A. V. Lindfors, J. Kujanpää, N. Kalakoski, A. Heikkilä, K. Lakkala, T. Mielonen, M. Sneep, N. A. Krotkov, A. Arola, J. Tamminen
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 997-1008 (2018)
The TROPOspheric Monitoring Instrument (TROPOMI) is the only payload of the Sentinel-5 Precursor (S5P), which is a polar-orbiting satellite mission of the European Space Agency (ESA). TROPOMI is a nadir-viewing spectrometer measuring in the ultrav
Externí odkaz:
https://doaj.org/article/87430e38f355473aa28e89452e6d9e47
Autor:
W. Wandji Nyamsi, M. R. A. Pitkänen, Y. Aoun, P. Blanc, A. Heikkilä, K. Lakkala, G. Bernhard, T. Koskela, A. V. Lindfors, A. Arola, L. Wald
Publikováno v:
Atmospheric Measurement Techniques, Vol 10, Pp 4965-4978 (2017)
A new method has been developed to estimate the global and direct solar irradiance in the UV-A and UV-B at ground level in cloud-free conditions. It is based on a resampling technique applied to the results of the k-distribution method and the cor
Externí odkaz:
https://doaj.org/article/c03384f16f4a4c24ac3317586b27174a
Autor:
J. Huttunen, H. Kokkola, T. Mielonen, M. E. J. Mononen, A. Lipponen, J. Reunanen, A. V. Lindfors, S. Mikkonen, K. E. J. Lehtinen, N. Kouremeti, A. Bais, H. Niska, A. Arola
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 8181-8191 (2016)
In order to have a good estimate of the current forcing by anthropogenic aerosols, knowledge on past aerosol levels is needed. Aerosol optical depth (AOD) is a good measure for aerosol loading. However, dedicated measurements of AOD are only avail
Externí odkaz:
https://doaj.org/article/8f1cba09a131486bb8db71c488645c43
Autor:
J. S. Mäkelä, K. Lakkala, T. Koskela, T. Karppinen, J. M. Karhu, V. Savastiouk, H. Suokanerva, J. Kaurola, A. Arola, A. V. Lindfors, O. Meinander, G. de Leeuw, A. Heikkilä
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 5, Iss 1, Pp 193-203 (2016)
The data flow involved in a long-term continuous solar spectral UV irradiance monitoring program is investigated and structured to provide an overall view on the multiphase process from data acquisition to the final products. The program employing Br
Externí odkaz:
https://doaj.org/article/cbdaf43b31354a33a6add1bbf8ca48a2
Autor:
A. Arola, G. L. Schuster, M. R. A. Pitkänen, O. Dubovik, H. Kokkola, A. V. Lindfors, T. Mielonen, T. Raatikainen, S. Romakkaniemi, S. N. Tripathi, H. Lihavainen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 22, Pp 12731-12740 (2015)
The importance of light-absorbing organic aerosols, often called brown carbon (BrC), has become evident in recent years. However, there have been relatively few measurement-based estimates for the direct radiative effect of BrC so far. In earlier stu
Externí odkaz:
https://doaj.org/article/1d6afff9524049449016b6d6c81e99ff
Autor:
W. Wandji Nyamsi, A. Arola, P. Blanc, A. V. Lindfors, V. Cesnulyte, M. R. A. Pitkänen, L. Wald
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 13, Pp 7449-7456 (2015)
The k-distribution method and the correlated-k approximation of Kato et al. (1999) is a computationally efficient approach originally designed for calculations of the broadband solar radiation at ground level by dividing the solar spectrum in 32 spec
Externí odkaz:
https://doaj.org/article/070956e4077d4723936f29f5c108f43e
Autor:
J. Huttunen, A. Arola, G. Myhre, A. V. Lindfors, T. Mielonen, S. Mikkonen, J. S. Schafer, S. N. Tripathi, M. Wild, M. Komppula, K. E. J. Lehtinen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 12, Pp 6103-6110 (2014)
The aerosol direct radiative effect (ADRE) is defined as the change in the solar radiation flux, F, due to aerosol scattering and absorption. The difficulty in determining ADRE stems mainly from the need to estimate F without aerosols, F0, with eithe
Externí odkaz:
https://doaj.org/article/666ed96feb7844fdadac14b35183c1ab
Autor:
V. Cesnulyte, A. V. Lindfors, M. R. A. Pitkänen, K. E. J. Lehtinen, J.-J. Morcrette, A. Arola
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 2, Pp 593-608 (2014)
This paper presents validation results of the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting System MACC (Monitoring Atmospheric Composition and Climate) re-analysis aerosol optical depth (AOD) for the period 2003
Externí odkaz:
https://doaj.org/article/9a70f9316561463cb4c6d689e34c1c30