Zobrazeno 1 - 10
of 61
pro vyhledávání: '"U. Blahak"'
Publikováno v:
Geoscientific Model Development, Vol 15, Pp 291-313 (2022)
Sensitivity experiments with a numerical weather prediction (NWP) model and polarimetric radar forward operator (FO) are conducted for a long-duration stratiform event over northwestern Germany to evaluate uncertainties in the partitioning of the ice
Externí odkaz:
https://doaj.org/article/b048dcde5286429885200c941b544ced
Autor:
S. Trömel, C. Simmer, U. Blahak, A. Blanke, S. Doktorowski, F. Ewald, M. Frech, M. Gergely, M. Hagen, T. Janjic, H. Kalesse-Los, S. Kneifel, C. Knote, J. Mendrok, M. Moser, G. Köcher, K. Mühlbauer, A. Myagkov, V. Pejcic, P. Seifert, P. Shrestha, A. Teisseire, L. von Terzi, E. Tetoni, T. Vogl, C. Voigt, Y. Zeng, T. Zinner, J. Quaas
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 17291-17314 (2021)
Cloud and precipitation processes are still a main source of uncertainties in numerical weather prediction and climate change projections. The Priority Programme “Polarimetric Radar Observations meet Atmospheric Modelling (PROM)”, funded by the G
Externí odkaz:
https://doaj.org/article/4853a1a108c64acaa8e1dd177e431a3f
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5735-5756 (2021)
Assimilation of weather radar measurements including radar reflectivity and radial wind data has been operational at the Deutscher Wetterdienst, with a diagonal observation error (OE) covariance matrix. For an implementation of a full OE covariance m
Externí odkaz:
https://doaj.org/article/d42b9a8dd85b437c88e6891806a64507
Autor:
M. Weger, B. Heinold, C. Engler, U. Schumann, A. Seifert, R. Fößig, C. Voigt, H. Baars, U. Blahak, S. Borrmann, C. Hoose, S. Kaufmann, M. Krämer, P. Seifert, F. Senf, J. Schneider, I. Tegen
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 17545-17572 (2018)
A regional modeling study on the impact of desert dust on cloud formation is presented for a major Saharan dust outbreak over Europe from 2 to 5 April 2014. The dust event coincided with an extensive and dense cirrus cloud layer, suggesting an influe
Externí odkaz:
https://doaj.org/article/7456192fe6634eed9ba0e3cf2794164a
Autor:
H. Wouters, M. Demuzere, U. Blahak, K. Fortuniak, B. Maiheu, J. Camps, D. Tielemans, N. P. M. van Lipzig
Publikováno v:
Geoscientific Model Development, Vol 9, Iss 9, Pp 3027-3054 (2016)
This paper presents the Semi-empirical URban canopY parametrization (SURY) v1.0, which bridges the gap between bulk urban land-surface schemes and explicit-canyon schemes. Based on detailed observational studies, modelling experiments and available p
Externí odkaz:
https://doaj.org/article/04c9168201404e9a807a5c91e43182e6
Publikováno v:
Geoscientific Model Development, Vol 7, Iss 2, Pp 463-478 (2014)
Analytic approximations of the binary collision rates of hydrometeors are derived for use in bulk microphysical parameterizations. Special attention is given to non-spherical hydrometeors like raindrops and snowflakes. The terminal fall velocity
Externí odkaz:
https://doaj.org/article/ef86cfaaa4ca4c3b99fb0e241fd2f4ed
Autor:
M. Bangert, A. Nenes, B. Vogel, H. Vogel, D. Barahona, V. A. Karydis, P. Kumar, C. Kottmeier, U. Blahak
Publikováno v:
Atmospheric Chemistry and Physics, Vol 12, Iss 9, Pp 4045-4063 (2012)
We investigated the impact of mineral dust particles on clouds, radiation and atmospheric state during a strong Saharan dust event over Europe in May 2008, applying a comprehensive online-coupled regional model framework that explicitly treats partic
Externí odkaz:
https://doaj.org/article/198c50fb2aed43f79837f46bf7b57366
Autor:
U. Blahak
Publikováno v:
Geoscientific Model Development, Vol 3, Iss 2, Pp 329-336 (2010)
This paper describes an approximation to the lower incomplete gamma function γl(a,x) which has been obtained by nonlinear curve fitting. It comprises a fixed number of terms and yields moderate accuracy (the absolute approximation error of the corre
Externí odkaz:
https://doaj.org/article/0d0d323a4faf431ea8e92624fbf6098d
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Akademický článek
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