Meteorological characteristics of the Po Valley fog

W. Wobrock; D. Schell; R. Maser; M. Kessel; W. Jaeschke; S. Fuzzi; M. C. Facchini; G. Orsi; A. Marzorati; P. Winkler; B. G. Arends; J. Bendix

doi:10.3402/tellusb.v44i5.15562

Meteorological characteristics of the Po Valley fog

Tellus B: Chemical and Physical Meteorology

Volume 44 (1992): Issue 5

By: W. Wobrock, D. Schell, R. Maser, M. Kessel, W. Jaeschke, S. Fuzzi, M. C. Facchini, G. Orsi, A. Marzorati, P. Winkler, B. G. Arends and J. Bendix

Open Access

|Jan 1992

Abstract

The meteorological situation during the first joint field campaign from 10-17 November 1989 of the EUROTRAC subproject GCE is discussed. The synoptic situation is illustrated by weather charts and satellite pictures. Backtrajectories were calculated in order to identify the origins of airmasses reaching the observation point. Model calculations were performed to explain the observed counter current channelling in the Po Valley. For the 5 different fog episodes observed, fog liquid water content, temperature, humidity, and wind speed are displayed as a function of height. Possible reasons for formation, evolution, and dissipation are discussed. It was found that the radiation effects only played a minor role. Most of the time, the fog at the observation site was either advected or formed due to the advection of cold or moist air.

References

Bachmann , M. and Bendix , J . 1992. An improved algo-rithm for NOAA-AHVRR image referencing. Int. J. of Remote Sensing, 13, no. 16, Nov. 1992.
Search in Google Scholar Back to article
Bendix , J. and Bachmann , M . 1991 . Ein operationelles einsetzbares Verfahren zur Nebelerkennung auf der Basis von AHVRR-Daten der NOAA-Satelliten . Meteor. Rundsch . 43 , 169 – 178 .
Search in Google Scholar Back to article
Choularton , T. W. , Fullarton , G. , Latham , J. , Mill , C. S. , Smith , M. H. and Stromberg , I. M . 1981 . A field study of radiation fog in Meppen, Germany , Quart. J. R. Met. Soc . 107 , 381 – 394 .
Search in Google Scholar Back to article
Fitzjarrald , D. R. and Lala , G. G . 1989 . Hudson Valley Fog Environments . J. Appl Meteor . 28 , 1303 – 1328 .
Search in Google Scholar Back to article
Fuzzi , S. , Facchini , M. C. , Orsi , G. , Lind , J. A. , Wobrock , W. , Kessel , M. , Maser , R. , Jaeschke , W. , Enderle , K. H. , Arends , B. G. , Berner , A. , Solly , I. , Kruisz , C. , Reischl , G. , Pahl , S. , Kaminski , U. , Winkler , P. , Ogren , J. A. , Noone , K. J. , Hallberg , A. , Fierlinger-Oberlinninger , H. , Puxbaum , H. , Marzorati , A. , Hansson , H.-C. , Wiedensohler , A. , Svenningsson , I. B. , Martinsson , B. G. , Schell , D. and Georgii , H. W . 1992 . The Po Valley fog experiment 1989 . An overview. Tellus 44B , 448 – 468 .
Search in Google Scholar Back to article
Facchini , M. C. , Fuzzi , S. , Kessel , M. , Wobrock , W. , Jaeschke , W. , Arends , B. G. , Möls , J. J. , Berner , A. , SoIly , I. , Kruisz , C. , Reischl , G. , Pahl , S. , Hallberg , A. , Ogren , J. A. , Fierlinger-Oberlinninger , H. , Marzorati , A. and Schell , D . 1992 . The chemistry of sulfur and nitrogen species in a fog system . A multiphase approach. Tellus 44B , 505 – 521 .
Search in Google Scholar Back to article
Gerber , H ., 1987 . Forward-scatter meter for estimating 10.6 pm aerosol extinction . App. Optics 26 , 539 – 544 .
Search in Google Scholar Back to article
Jiusto , J. E. and Lala , G. G . 1983. Radiation fog field programs, recent studies. ASRC-SUNY, Publ. No. 869.
Search in Google Scholar Back to article
Kessel , M. , Grieser , J. , Wobrock , W. , Jaeschke , W. , Fuzzi , S. , Facchini , M. C. and Orsi , G . 1992 . Nitrogen oxides concentrations and soil emission fluxes in the Po Valley . Tellus 44B , 522 – 532 .
Search in Google Scholar Back to article
Petterssen , S . 1956. Weather analysis and forecasting. McGraw-Hill Book Company, New York, Toronto, London, 428 pp.
Search in Google Scholar Back to article
Pilié , R. J. , Mack , E. J. , Kocmond , W. C. , Rogers , C. W. and Eadie , W. J . 1975 . The Life cycle of valley fog. Part I: Micrometeorological characteristics . J. App. Meteor . 14 , 347 – 363 .
Search in Google Scholar Back to article
Roach , W. T. , Brown , R. , Caughey , S. J. , Garland , J. A. and Readings , C. J . 1976 . The physics of radiation fog: I, a field study . Quart. J. R. Met. Soc . 102 , 313 – 333 .
Search in Google Scholar Back to article
Wattle , B. J. , Mack , E. J. , Pilié , R. J. and Hanley , J. T . 1984. The role of vegetation in low-level water budget in fog. ARVIN/CALSPAN Advanced Technology Center, No. DAAG29-82-C-0022,33 pp.
Search in Google Scholar Back to article
Wippermann , F . 1984 . Air flow over and in broad valleys: Channelling and Counter-current . Con trib. Phys. Atmos . 57 , 92 – 105 .
Search in Google Scholar Back to article

Articles in this issue

DOI: https://doi.org/10.3402/tellusb.v44i5.15562 | Journal eISSN: 1600-0889

Journal RSS Feed

Language: English

Page range: 469 - 488

Submitted on: Nov 29, 1991

Accepted on: Jun 11, 1992

Published on: Jan 1, 1992

Published by: Stockholm University Press

In partnership with: Paradigm Publishing Services

© 1992 W. Wobrock, D. Schell, R. Maser, M. Kessel, W. Jaeschke, S. Fuzzi, M. C. Facchini, G. Orsi, A. Marzorati, P. Winkler, B. G. Arends, J. Bendix, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 44 (1992): Issue 5