Low Level Convergence And The Prediction Of Convective Precipitation In South Florida

Author : Andrew I. Watson
Publisher : Unknown
Page : 238 pages
File Size : 42,9 Mb
Release : 1981
Category : Convection (Meteorology)
ISBN : UIUC:30112104608747

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Low-level Convergence and the Prediction of Convective Precipitation in South Florida by Andrew I. Watson Pdf

A reliable method is presented for the prediction of convective precipitation in south Florida. Total area diverence is statistically related to area rainfall as derived by radar in a mesoscale region on the order of 1400 sq km. Various network grids and sizes are examined to find the best scale to measure total area divergence. The response of visible clouds to surface convergence is investigated with time-lapse photographs taken in the FACE mesonetwork. One case study of a convective storm complex as measured by Doppler radar and surface pressure data is presented. Finally, vertical adjustment factors are determined for surface winds under varying meteorological conditions and time of day. (Author).

Author : Bernice Ackerman
Publisher : Unknown
Page : 136 pages
File Size : 43,8 Mb
Release : 1982
Category : Convection (Meteorology)
ISBN : UIUC:30112104631566

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Low Level Convergence and the Prediction of Convective Precipitation by Bernice Ackerman Pdf

Researchers at the University of Virginia, the Office of Weather Research and Modification (OWRM) of NOAA (formerly the cumulus group of Hurricane and Experimental Meteorological Laboratory), and the Illinois State Water Survey, have engaged in a collaborative effort to study the relationship between surface convergence and subsequent precipitation from convective clouds in both subtropical marine and mid-latitude continental climates. The overall goal of the research was to increase the understanding of the dynamics involved in the development of convective clouds and in cloud interactions on the mesoscale. More specifically, the research focused on the role of low level and surface convergence in the evolution of precipitating convective systems and on developing methods by which this increased knowledge could be used for nowcasting convective precipitation. The research studies were based both on existing data sets from Florida and the Midwest and on measurements made in a special field project carried out during the second year of the three year project. (Author).

Author : Anonim
Publisher : Unknown
Page : 1298 pages
File Size : 42,7 Mb
Release : 1992
Category : Electronic journals
ISBN : CUB:U183013003449

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Monthly Weather Review by Anonim Pdf

Author : United States. Air Force. Directorate of Chemical and Atmospheric Sciences
Publisher : Unknown
Page : 190 pages
File Size : 41,6 Mb
Release : 1980
Category : Atmospheric chemistry
ISBN : UCLA:L0072654197

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AFOSR Chemical & Atmospheric Sciences Program Review by United States. Air Force. Directorate of Chemical and Atmospheric Sciences Pdf

Author : Otto W. Thiele
Publisher : Unknown
Page : 76 pages
File Size : 51,9 Mb
Release : 1987
Category : Microwave detectors
ISBN : NASA:31769000526411

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On Requirements for a Satellite Mission to Measure Tropical Rainfall by Otto W. Thiele Pdf

Author : Anonim
Publisher : Unknown
Page : 244 pages
File Size : 45,7 Mb
Release : 1977
Category : Astronautics
ISBN : MINN:31951P00020105H

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NASA Reference Publication by Anonim Pdf

Author : Andrew I. Watson
Publisher : Unknown
Page : 78 pages
File Size : 53,6 Mb
Release : 1982
Category : Convection (Meteorology)
ISBN : UIUC:30112104608739

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The Relationship Between Low-level Convergence and Convective Precipitation in Illinois and South Florida by Andrew I. Watson Pdf

The relationship between total area divergence and convective rainfall was examined using surface data collected during the VIN 1979 field experiment in Illinois. The mesonetwork covered an area of 2800 km 2. Total area divergence, an area-averaged quantity, can also be expressed by the line integral of the normal component of the wind around the network boundary. Total area divergence was statistically related to area rainfall based upon the criterion that a convergence event occurred anytime there was a sustained change in total area divergence of less than -1/40000s s-1 for greater than 10 minutes. The difference between initial convergence and maximum convergence was related to total area precipitation associated with the convergence. During the 33-day study, there were 106 convergence events. Forty-four of the events had rainfall, and the average was 1.53 mm per event. The correlation coefficient was -0.50. Other meteorological factors also have an influence on convergence and the production of precipitation such as middle-level moisture, stability, and low-level wind speed which improve the statistical relationships in many instances. Weighted convergence, a subset of total area divergence was also used to develop regression relationships. When compared with south Florida relationships from an earlier investigation, the Illinois results show that the correlation between convergence and rainfall has dropped a tenth in almost all cases.

Author : Anonim
Publisher : Unknown
Page : 836 pages
File Size : 52,7 Mb
Release : 1994
Category : Aeronautics
ISBN : UIUC:30112067190055

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Scientific and Technical Aerospace Reports by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 232 pages
File Size : 44,6 Mb
Release : 1981
Category : Science
ISBN : CORNELL:31924057177424

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Technical Abstract Bulletin by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 116 pages
File Size : 40,9 Mb
Release : 2024-06-24
Category : Meteorology
ISBN : PSU:000023526914

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Research Work in Tropical Meteorology by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 770 pages
File Size : 47,6 Mb
Release : 2024-06-24
Category : Meteorology
ISBN : UCSD:31822009634189

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National Research Work in Tropical Meteorology Report by Anonim Pdf

Author : John L. Vogel
Publisher : Unknown
Page : 60 pages
File Size : 41,5 Mb
Release : 1983
Category : Cloud physics
ISBN : UIUC:30112109134178

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Sub-cloud Layer Kinematics and Convective Rainfall in Central Illinois by John L. Vogel Pdf

The kinematic parameters of divergence and vorticity in the lowest 450 m of the atmosphere were calculated ofr a 750 km area in east central Illinois form wind measurements obtained using pilot balloons. The area for which the analysis has been made is triangular, west of Champaign/Urbana. These and similar data for the surface have been analyzed for nine days of the summer of 1979. Most of the observations were made during the afternoon and early evening hours during periods when tropical air masses overlay the observational network. The maximum surface temperatures on these days ranged from 26.5 to 35 C, and the surface dew-point temperatures varied from 18 to 24 C, approximately normal for temperature but more humid then normal. (The average dew-point for central Illinois is 18 C during July, 17 C in August.) The precipitable water content from the surface to 400 mb ranged from 3.2 to 5.3 cm, higher (by as much as 77% at the extreme) than the normal precipitable water over central Illinois during July or August (Lott, 1976). (Author).

Author : Anonim
Publisher : Unknown
Page : 388 pages
File Size : 48,8 Mb
Release : 1983
Category : Aeronautics
ISBN : UCSD:31822000482166

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Aerospace and Aeronautical Meteorology by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 76 pages
File Size : 41,9 Mb
Release : 1987
Category : Weather forecasting
ISBN : WISC:89053251799

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On Requirements for a Satellite Mission to Measure Tropical Rainfall by Anonim Pdf

Author : University Corporation for Atmospheric Research
Publisher : Unknown
Page : 558 pages
File Size : 46,8 Mb
Release : 1983
Category : Atmospheric circulation
ISBN : UCSD:31822010025286

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The National STORM Program by University Corporation for Atmospheric Research Pdf