Download or read book Low level Convergence and the Prediction of Convective Precipitation in South Florida written by Andrew I. Watson and published by . This book was released on 1981 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book Low Level Convergence and the Prediction of Convective Precipitation written by Bernice Ackerman and published by . This book was released on 1982 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).

Download or read book Intraseasonal Variability in the Atmosphere Ocean Climate System written by William K.-M. Lau and published by Springer Science & Business Media. This book was released on 2011-10-25 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improving the reliability of long-range forecasts of natural disasters, such as severe weather, droughts and floods, in North America, South America, Africa and the Asian/Australasian monsoon regions is of vital importance to the livelihood of millions of people who are affected by these events. In recent years the significance of major short-term climatic variability, and events such as the El Nino/Southern Oscillation in the Pacific, with its worldwide effect on rainfall patterns, has been all to clearly demonstrated. Understanding and predicting the intra-seasonal variability (ISV) of the ocean and atmosphere is crucial to improving long range environmental forecasts and the reliability of climate change projects through climate models. In the second edition of this classic book on the subject, the authors have updated the original chapters, where appropriate, and added a new chapter that includes short subjects representing substantial new development in ISV research since the publication of the first edition.

Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research in Progress written by and published by . This book was released on with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Synoptic dynamic Precursors to Extreme Cases of Tropospheric Moisture Flux Convergence in the United States Midwest and Their Relationship to Precipitation written by Laura Twidle and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Midwest US is prone to receiving heavy precipitation events, including Mesoscale Convective Systems (MCSs), during the warm season. These MCSs may produce rainfalls, in a 1-2 day period, with amounts well above the monthly climatology. The ability to recognize the patterns and mechanisms that accompany these convective systems is crucial for forecasting their timing and location. Horizontal moisture flux convergence (MFC) is a useful tool in short-term prediction of convection since it contains information on the low-level forcing and the amount of moisture available. However, if there is no support in the upper levels then the likelihood of thunderstorm development is significantly diminished. Using the NARR (North American Regional Reanalysis) dataset, we compute the tropospheric MFC every 3 hours during a 36-year period (1979-2014) through the months of May to August. A 24-h running mean was applied to the 3-hourly tropospheric MFC, and the 99th percentile was selected. An additional criterion ensuring synoptic independence (five days before/after the largest event) was applied, yielding 72 cases. The low-level moisture transport (1000-700hPa) and upper level flow was analyzed for each case, facilitating the classification of cases. Classifications include 1) southwesterly, 2) high amplitude (HA), 3) low amplitude, 4) northwesterly: low amplitude, and 5) northwesterly: high amplitude and 6) other flow. The overall atmospheric circulation structures differ substantially among the categories, where some related more to an upstream trough and others to a downstream ridge. The HA category tended to have the highest precipitating cases due to the strong forcing for ascent found during a Q-vector analysis. Perhaps surprisingly, there were several cases that showed very little precipitation, these low precipitation cases were generally associated with a region of differential anticyclonic vorticity advection. The highest observed precipitating events in the Midwest were then compared to tropospheric MFC, where 6 out of the top 10 were associated with one of the 72 extreme tropospheric MFC cases. Finally, a case study was performed for one of these cases, that of 25 May 2011 to analyze the synoptic environment and forcing for ascent more carefully. We concluded that extreme vertically integrated, horizontal moisture flux convergence (VIMFC) is capable of capturing high precipitation cases, but not all extreme VIMFC cases have high precipitation; to ensure high precipitation, there needs to be upper-level divergence and convective available potential energy (CAPE)." --

Download or read book Research in Progress Between and written by United States. Army Research Office and published by . This book was released on 1978 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AFOSR Chemical Atmospheric Sciences Program Review written by United States. Air Force. Directorate of Chemical and Atmospheric Sciences and published by . This book was released on with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Weather Review written by and published by . This book was released on 2003 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Work in Tropical Meteorology written by and published by . This book was released on with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1981 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Severe Convective Storms written by Charles Doswell and published by Springer. This book was released on 2015-03-30 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly illustrated book is a collection of 13 review papers focusing on convective storms and the weather they produce. It discusses severe convective storms, mesoscale processes, tornadoes and tornadic storms, severe local storms, flash flood forecast and the electrification of severe storms.

Download or read book On Requirements for a Satellite Mission to Measure Tropical Rainfall written by Otto W. Thiele and published by . This book was released on 1987 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Research Work in Tropical Meteorology Report written by and published by . This book was released on with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Weather and Climate Prediction written by Thomas Tomkins Warner and published by Cambridge University Press. This book was released on 2010-12-02 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook provides a comprehensive yet accessible treatment of weather and climate prediction, for graduate students, researchers and professionals. It teaches the strengths, weaknesses and best practices for the use of atmospheric models. It is ideal for the many scientists who use such models across a wide variety of applications. The book describes the different numerical methods, data assimilation, ensemble methods, predictability, land-surface modeling, climate modeling and downscaling, computational fluid-dynamics models, experimental designs in model-based research, verification methods, operational prediction, and special applications such as air-quality modeling and flood prediction. This volume will satisfy everyone who needs to know about atmospheric modeling for use in research or operations. It is ideal both as a textbook for a course on weather and climate prediction and as a reference text for researchers and professionals from a range of backgrounds: atmospheric science, meteorology, climatology, environmental science, geography, and geophysical fluid mechanics/dynamics.

Download or read book Environmental Hazards Methodologies for Risk Assessment and Management written by Nicolas R. Dalezios and published by IWA Publishing. This book was released on 2017-02-15 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the beginning of 21st century, there has been an awareness of risk in the environment along with a growing concern for the continuing potential damage caused by hazards. In order to ensure environmental sustainability, a better understanding of natural disasters and their impacts is essential. It has been recognized that a holistic and integrated approach to environmental hazards needs to be attempted using common methodologies, such as risk analysis, which involves risk management and risk assessment. Indeed, risk management means reducing the threats posed by known hazards, whereas at the same time accepting unmanageable risks and maximizing any related benefits. The risk management framework involves evaluating the importance of a risk, either quantitatively or qualitatively. Risk assessment comprises three steps, namely risk identification (data base, event monitoring, statistical inference), risk estimation (magnitude, frequency, economic costs) and risk evaluation (cost-benefit analysis). Nevertheless, the risk management framework also includes a fourth step, risk governance, i.e. the need for a feedback of all the risk assessment undertakings. There is currently a lack of such feedback which constitutes a serious deficiency in the reduction of environmental hazards. This book emphasises methodological approaches and procedures of the three main components in the study of environmental hazards, namely forecasting - nowcasting (before), monitoring (during) and assessment (after), based on geoinformatic technologies and data and simulation through examples and case studies. These are considered within the risk management framework and, in particular, within the three components of risk assessment, namely risk identification, risk estimation and risk evaluation. This approach is a contemporary and innovative procedure and constitutes current research in the field of environmental hazards. Environmental Hazards Methodologies for Risk Assessment and Management covers hydrological hazards (floods, droughts, storms, hail, desertification), biophysical hazards (frost, heat waves, epidemics, forest fires), geological hazards (landslides, snow avalanches), tectonic hazards (earthquakes, volcanoes), and technological hazards. This book provides a text and a resource on environmental hazards for senior undergraduate students, graduate students on all courses related to environmental hazards and risk assessment and management. It is a valuable handbook for researchers and professionals of environmental science, environmental economics and management, and engineering. Editor: Nicolas R. Dalezios, University of Thessaly, Greece