Zobrazeno 1 - 10
of 546
pro vyhledávání: '"T. Nousiainen"'
Autor:
W. Schmidt, A.-M. Harri, T. Nousiainen, H. Hohti, L. Johansson, O. Ojanperä, E. Viitala, J. Niemi, J. Turpeinen, E. Saukko, T. Rönkkö, P. Lahti
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 9, Pp 397-406 (2020)
CITYZER develops new digital services and products to support decision-making processes related to weather and air quality in cities. This includes, for example, early warnings and forecasts (0–24 h), which allow for avoiding weather-related acci
Externí odkaz:
https://doaj.org/article/cc3d054eaca54d2584536f1211b280e8
Autor:
P. Haapanala, P. Räisänen, G. M. McFarquhar, J. Tiira, A. Macke, M. Kahnert, J. DeVore, T. Nousiainen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 6865-6882 (2017)
The impact of ice clouds on solar disk and circumsolar radiances is investigated using a Monte Carlo radiative transfer model. The monochromatic direct and diffuse radiances are simulated at angles of 0 to 8° from the center of the sun. Input dat
Externí odkaz:
https://doaj.org/article/15f2e3e00e8941008cfbb980f97f8356
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 12397-12410 (2016)
Mineral dust interacts with incoming/outgoing radiation, gases, other aerosols, and clouds. The assessment of its optical and chemical impacts requires knowledge of the physical and chemical properties of bulk dust and single particles. Despite th
Externí odkaz:
https://doaj.org/article/cef5c1e442014eb69406c829dfd24734
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 19, Pp 11117-11132 (2015)
Distributions of ellipsoids are often used to simulate the optical properties of non-ellipsoidal atmospheric particles, such as dust. In this work, the applicability of ellipsoids for retrieving the refractive index of dust-like target model particle
Externí odkaz:
https://doaj.org/article/673ef7b98bdc4c89898b4acaede0f567
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 20, Pp 12011-12027 (2015)
There is a large variety of internal structures inside atmospheric dust particles, making them inherently inhomogeneous. Such structures may have a large effect on ground-level and atmospheric radiation. So far, dust particle internal structures and
Externí odkaz:
https://doaj.org/article/fa876c0123f74fb0be5e37a20a8ae023
Publikováno v:
The Cryosphere, Vol 9, Iss 3, Pp 1277-1301 (2015)
Snow consists of non-spherical grains of various shapes and sizes. Still, in many radiative transfer applications, single-scattering properties of snow have been based on the assumption of spherical grains. More recently, second-generation Koch fr
Externí odkaz:
https://doaj.org/article/d97862af908241f89001bb4193e02d22
Autor:
G. Y. Jeong, T. Nousiainen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 14, Pp 7233-7254 (2014)
Mineral dust interacts with incoming/outgoing electromagnetic radiation in the atmosphere. This interaction depends on the microphysical properties of the dust particles, including size, mineral composition, external morphology, and internal structur
Externí odkaz:
https://doaj.org/article/f2329f6521b844e4af5629d0685b4259
Publikováno v:
Atmospheric Measurement Techniques, Vol 7, Iss 4, Pp 919-929 (2014)
The reverse absorption technique is often used to detect volcanic ash clouds from thermal infrared satellite measurements. From these measurements effective particle radius and mass loading may be estimated using radiative transfer modelling. The rad
Externí odkaz:
https://doaj.org/article/1e0a3d5df6fd4e5683700b22a2ffcc70
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 1, Pp 143-157 (2014)
Light scattering by single, inhomogeneous mineral dust particles was simulated based on shapes and compositions derived directly from measurements of real dust particles instead of using a mathematical shape model. We demonstrate the use of the stere
Externí odkaz:
https://doaj.org/article/1889c2dc8fc843d3b8ce2b52afa90cc8
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 14, Pp 6757-6776 (2013)
During transport by advection, atmospheric nonspherical particles, such as volcanic ash, desert dust or sea-salt particles experience several chemical and physical processes, leading to a complex vertical atmospheric layering at remote sites where in
Externí odkaz:
https://doaj.org/article/1222d1211af7482b87c83ee4f03e5f3d