Zobrazeno 1 - 10
of 36
pro vyhledávání: '"S. Piketh"'
Autor:
N. Bègue, L. Shikwambana, H. Bencherif, J. Pallotta, V. Sivakumar, E. Wolfram, N. Mbatha, F. Orte, D. J. Du Preez, M. Ranaivombola, S. Piketh, P. Formenti
Publikováno v:
Annales Geophysicae, Vol 38, Pp 395-420 (2020)
This study investigates the influence of the 2015 Calbuco eruption (41.2∘ S, 72.4∘ W; Chile) on the total columnar aerosol optical properties over the Southern Hemisphere. The well-known technic of sun photometry was applied for the investiga
Externí odkaz:
https://doaj.org/article/69340afd2f8349799e8a4f1575ef408d
Autor:
S. E. LeBlanc, J. Redemann, C. Flynn, K. Pistone, M. Kacenelenbogen, M. Segal-Rosenheimer, Y. Shinozuka, S. Dunagan, R. P. Dahlgren, K. Meyer, J. Podolske, S. G. Howell, S. Freitag, J. Small-Griswold, B. Holben, M. Diamond, R. Wood, P. Formenti, S. Piketh, G. Maggs-Kölling, M. Gerber, A. Namwoonde
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 1565-1590 (2020)
The southeast Atlantic (SEA) region is host to a climatologically significant biomass burning aerosol layer overlying marine stratocumulus. We present the first results of the directly measured above-cloud aerosol optical depth (ACAOD) from the recen
Externí odkaz:
https://doaj.org/article/744632ebad8148e08aba60b5c9b4ba10
Autor:
C. Di Biagio, P. Formenti, Y. Balkanski, L. Caponi, M. Cazaunau, E. Pangui, E. Journet, S. Nowak, M. O. Andreae, K. Kandler, T. Saeed, S. Piketh, D. Seibert, E. Williams, J.-F. Doussin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 15503-15531 (2019)
The optical properties of airborne mineral dust depend on its mineralogy, size distribution, and shape, and they might vary between different source regions. To date, large differences in refractive index values found in the literature have not been
Externí odkaz:
https://doaj.org/article/5490f0b7684f49c5a00022f0184f1b91
Autor:
S. Broccardo, K.-P. Heue, D. Walter, C. Meyer, A. Kokhanovsky, R. van der A, S. Piketh, K. Langerman, U. Platt
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 2797-2819 (2018)
Aircraft measurements of NO2 using an imaging differential optical absorption spectrometer (iDOAS) instrument over the South African Highveld region in August 2007 are presented and compared to satellite measurements from OMI and SCIAMACHY. In sit
Externí odkaz:
https://doaj.org/article/96879853d3e6476cb234d7cd43f1fbb7
An overview of mesoscale aerosol processes, comparisons, and validation studies from DRAGON networks
Autor:
B. N. Holben, J. Kim, I. Sano, S. Mukai, T. F. Eck, D. M. Giles, J. S. Schafer, A. Sinyuk, I. Slutsker, A. Smirnov, M. Sorokin, B. E. Anderson, H. Che, M. Choi, J. H. Crawford, R. A. Ferrare, M. J. Garay, U. Jeong, M. Kim, W. Kim, N. Knox, Z. Li, H. S. Lim, Y. Liu, H. Maring, M. Nakata, K. E. Pickering, S. Piketh, J. Redemann, J. S. Reid, S. Salinas, S. Seo, F. Tan, S. N. Tripathi, O. B. Toon, Q. Xiao
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 655-671 (2018)
Over the past 24 years, the AErosol RObotic NETwork (AERONET) program has provided highly accurate remote-sensing characterization of aerosol optical and physical properties for an increasingly extensive geographic distribution including all conti
Externí odkaz:
https://doaj.org/article/927e28bb64644449b0ed1f0125743abf
Autor:
L. Caponi, P. Formenti, D. Massabó, C. Di Biagio, M. Cazaunau, E. Pangui, S. Chevaillier, G. Landrot, M. O. Andreae, K. Kandler, S. Piketh, T. Saeed, D. Seibert, E. Williams, Y. Balkanski, P. Prati, J.-F. Doussin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 7175-7191 (2017)
This paper presents new laboratory measurements of the mass absorption efficiency (MAE) between 375 and 850 nm for 12 individual samples of mineral dust from different source areas worldwide and in two size classes: PM10. 6 (mass fraction of parti
Externí odkaz:
https://doaj.org/article/81527627e72544e1ad6c079ff4e58d7e
Autor:
C. Di Biagio, P. Formenti, Y. Balkanski, L. Caponi, M. Cazaunau, E. Pangui, E. Journet, S. Nowak, S. Caquineau, M. O. Andreae, K. Kandler, T. Saeed, S. Piketh, D. Seibert, E. Williams, J.-F. Doussin
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 3, Pp 1901-1929 (2017)
Modeling the interaction of dust with long-wave (LW) radiation is still a challenge because of the scarcity of information on the complex refractive index of dust from different source regions. In particular, little is known about the variability of
Externí odkaz:
https://doaj.org/article/595571050eab452f9a890405aa5762d9
Autor:
A.-M. Sundström, A. Nikandrova, K. Atlaskina, T. Nieminen, V. Vakkari, L. Laakso, J. P. Beukes, A. Arola, P. G. van Zyl, M. Josipovic, A. D. Venter, K. Jaars, J. J. Pienaar, S. Piketh, A. Wiedensohler, E. K. Chiloane, G. de Leeuw, M. Kulmala
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 9, Pp 4983-4996 (2015)
Proxies for estimating nucleation mode number concentrations and further simplification for their use with satellite data have been presented in Kulmala et al. (2011). In this paper we discuss the underlying assumptions for these simplifications and
Externí odkaz:
https://doaj.org/article/6cb904cfb1994cffbe7ecae4871aa2ec
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
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 8, Pp 4259-4278 (2015)
We present a comprehensive overview of particulate air quality across the five major metropolitan areas of South Africa (Cape Town, Bloemfontein, Johannesburg and Tshwane (Gauteng Province), the Industrial Highveld Air Quality Priority Area (HVAPA),
Externí odkaz:
https://doaj.org/article/69856c5a27e842308849eb5782ba7f05