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Book Tropical Cyclone Activity over the North Indian Ocean

Download or read book Tropical Cyclone Activity over the North Indian Ocean written by M. Mohapatra and published by Springer. This book was released on 2016-11-24 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals primarily with understanding, monitoring and prediction of Tropical Cyclones (TCs) over the North Indian Ocean (NIO). There is special emphasis on TC genesis, intensification, movement and associated adverse weather like heavy rainfall and gale winds. It highlights the current state of research on TCs over the NIO and recent improvements in early warning systems due to advances in observational, analytical and numerical weather prediction techniques. The chapters in the book are authored by leading experts from research and operational environments.The chapters presented in the book intend to stimulate thinking and hence further research in the field of TCs, especially over the NIO region. They provide high quality reference material for all experts working in the field of TC related disaster management. This book is relevant to TC forecasters and researchers, managers, policy makers, graduate and undergraduate students.

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Masters Theses in the Pure and Applied Sciences

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.

Book High Impact Weather Events over the SAARC Region

Download or read book High Impact Weather Events over the SAARC Region written by Kamaljit Ray and published by Springer. This book was released on 2014-11-19 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of papers contributed by researchers and scientists from SAARC nations and deals with high-impact weather conditions, their prediction and potential consequences for populations in the SAARC region. There have been a number of recent advances in our understanding and prediction of cyclones, severe thunderstorms, squalls, heat and cold waves, droughts and heavy rainfall, based on the latest observational data and NWP modeling platform. The SAARC region is vulnerable to high-impact weather events because of geophysical features like high mountains, plateaus and vast oceans. As our climate continues to change over the coming years, the likelihood of extreme and potentially high-impact weather and climate events will be at its highest when natural and anthropogenic effects combine. All chapters were written by leading experts in their respective research and operational fields. The book reviews the latest research, future needs, forecasting skills and societal impacts of extreme weather events and offers high-quality reference material for weather forecasters, disaster managers and researchers.

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-03 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Intensification and Structure Change of Super Typhoon Flo as Related to the Large Scale Environment

Download or read book Intensification and Structure Change of Super Typhoon Flo as Related to the Large Scale Environment written by David W. Titley and published by . This book was released on 1998-06-01 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Multi-Quadric (MQ) analysis is developed and compared with the four-dimensional data assimilation analyses of the structure of Typhoons Flo and Ed during the Tropical Cyclone Motion (TCM-90) field experiment. The MQ analysis has been shown to provide an alternate, plausible depiction of the tropical atmosphere. These analyses are used to compare physical processes leading to rapid intensification of Flo, but not of Ed. Significant documentations include: (1) the existence of a "cyclonic wind burst" extending beyond 1000 km radius at 200 mb during the forcing phase for Typhoon Flo, which appears to be the result of strong, sustained eddy flux convergence of angular momentum (EFC) in the upper troposphere; (2) a complex EFC vertical structure that evolved with time; (3) Flo had developed a warmer core near the tropopause, and was less stable than Ed in the upper troposphere prior to the beginning of the rapid intensification period; (4) a high correlation of the mid-troposphere azimuthally-averaged absolute vorticity with the 48-h future intensity of four tropical cyclones; and (5) the 850 - 200 mb vertical wind shear for Typhoon Ed was less than the vertical shear calculated for Typhoon Flo, which implies that low vertical shear, although necessary for significant storm development is not, by itself, a sufficient dynamic factor to ensure rapid intensification. A conceptual model is proposed for tropical cyclone rapid intensification and subsequent weakening that accounts for varying EFC and vertical shear values. Although based on Typhoon Ed and Flo, this model is also consistent with intensity changes of Typhoons Yancy and Zola.

Book Government Reports Annual Index

Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Book 21st Conference on Hurricanes and Tropical Meteorology

Download or read book 21st Conference on Hurricanes and Tropical Meteorology written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Monthly Weather Review

Download or read book Monthly Weather Review written by and published by . This book was released on 2000-08 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Tropical Cyclone Initiation by the Tropical Upper Tropospheric Trough

Download or read book Tropical Cyclone Initiation by the Tropical Upper Tropospheric Trough written by James C. Sadler and published by . This book was released on 1976 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improved satellite observations and an increased quantity of aircraft wind observations are meshed for case studies to modify the earlier synoptic model of tropical cyclone initiation by the Tropical Upper Tropospheric Trough (TUTT). The major modification is in the vertical linkage between the upper and lower cyclonic systems. In the previous model (Sadler, 1967) it was proposed that the surface system resulted from a sloping downward penetration of the strong TUTT cell and, due to the slope, the surface disturbance was properly positioned under the upper divergence for intensification. These current studies show that the TUTT cell does not penetrate into the near surface layer but that the surface disturbance is induced by the upper divergence to the east of the TUTT cell and the two systems are initially separated by some 300 to 500 km. The better observations also permit a more detailed description of the upper circulation patterns to show how the convection associated with the intensifying surface system 'kills' the parent TUTT cell. (Author).

Book Improving Tropical Cyclone Forecasts from Formation to Maturity Using Ensemble Based Data Assimilation

Download or read book Improving Tropical Cyclone Forecasts from Formation to Maturity Using Ensemble Based Data Assimilation written by Christopher Hartman and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies comprising this dissertation use a state-of-the-art ensemble-based data assimilation (DA) system developed at The Pennsylvania State University to improve forecasts of tropical cyclones (TCs) during two of the least predictable stages of their lifecycle: formation (i.e., tropical cyclogenesis; hereafter TCG) and rapid intensification (RI). These improvements are realized by assimilating infrared (IR) brightness temperatures (BTs) observed by geostationary satellites under both clear and cloudy conditions. The all-sky IR BTs assimilated by the DA system help to constrain the initial moisture estimates within the core of the developing system in analyses via the strong ensemble correlations that exist between moisture content and simulated BTs. It is shown that forecasts initialized from these analyses exhibit a more realistic convective evolution, which translates to improved prediction of TCG and RI. For the case of TCG, the assimilation of upper-tropospheric water vapor channel BTs observed by the Meteosat-10 Spinning Enhanced Visible and InfraRed Imager (SEVIRI) instrument improves the timing of TCG in forecasts of Hurricane Irma (2017). In an experiment that withheld the BTs, TCG was premature by at least 24 hours due to an overestimation of the spatial coverage of deep convection within the African Easterly Wave (AEW) that Irma formed from. Spurious convection led to stronger low-level convergence and the earlier spin-up of a low-level meso-[beta]-scale (i.e., 20 -- 200 km) vortex. This was ameliorated by assimilating all-sky IR BTs. Furthermore, the substantial impact of initial moisture uncertainty within the incipient disturbance is revealed by initializing ensemble forecasts with only the initial moisture perturbations retained. Relative to an ensemble with initial perturbations to all variables, at least half of the intensity forecast uncertainty is attributed to initial moisture uncertainty within the AEW. These results show the importance of targeting the incipient disturbance with high spatio-temporal water vapor observations for ingestion into DA systems. For the case of RI, the assimilation of upper-tropospheric water vapor channel BTs observed by the GOES-16 Advanced Baseline Imager (ABI) led to significant improvements in the intensity forecasts of Hurricane Dorian (2019) at lead times of 48 hours and longer. These improvements are shown to be a result of better analyzed cloud fields as well as more intense initial primary and secondary circulations. Despite these improvements, the vortex exhibited an unrealistically broad structure that was fine-tuned by the additional assimilation of tail Doppler radar (TDR) radial velocities collected by NOAA P-3 aircraft. The simultaneous assimilation of all-sky IR BTs and radar observations therefore resulted in realistic forecasts of the track, structure, and RI of Dorian. These results underscore the potential of TDR observations to complement the benefits gained by assimilating all-sky IR BTs.

Book The Association of Tall Eyewall Convection with Tropical Cyclone Intensification

Download or read book The Association of Tall Eyewall Convection with Tropical Cyclone Intensification written by Owen A. Kelley and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite decades of research, operational weather agencies still find it difficult to predict change in the intensity of a tropical cyclone's surface wind. This dissertation examines whether precipitation cells in a tropical cyclone eyewall provide information about change in wind intensity. Nine years of tropical cyclone overflights are studied with the first radar in space capable of resolving the detailed three-dimensional structure of precipitation. This radar is the Precipitation Radar on the Tropical Rainfall Measuring Mission (TRMM) satellite. With a single satellite overflight, the presence or absence of a tall eyewall cell correctly identifies whether or not intensification is occurring 62% of the time (166 out of 269 overflights). The empirical association of tall eyewall cells and wind intensification is also examined in a decade of tropical cyclones near landfall observed with the WSR-88D ground radars along the U.S. coast. With at least a 3 hour period of continuous ground radar observation, the frequent occurrence of tall eyewall cells (at least 1 in 3 volume scans) correctly identifies whether or not wind intensification is occurring 83% of the time (24 out of 29 observation periods). These results suggest that the near-continuous nature of ground radar data compensates for the ground radar's coarser vertical resolution compared with the TRMM satellite radar. Physical mechanisms for the observed association are discussed. Based on an upper bound calculation, the energy released during a 9 hour long burst of tall eyewall cells could warm a tropical cyclone's eye by at most 4 K if the eye's radius were small (20 km). If the eye's radius were large (40 km), the same cells could warm the eye by at most 1 K. These upper bounds are based on the amount of latent heat released by the burst of tall cells. From the upper bound to the eye warming, an upper bound can be estimated for the maximum wind intensification that might be caused by the tall eyewall cells.

Book The Role of the Ocean in Convective Burst Initiation

Download or read book The Role of the Ocean in Convective Burst Initiation written by Paula Ann Hennon and published by . This book was released on 2005 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The upper ocean significantly influences tropical cyclone structure and intensity. These effects, however, are not well understood mostly due to a lack of oceanic and atmospheric boundary layer observations within the inner-core region. This study relates ocean-atmosphere energy exchange processes to mid-to-upper tropospheric latent heating using mesoscale inner-core convective burst events. A global survey of convective burst events in tropical cyclones from the year 1999 - 2001 was constructed. This study shows that 80% of tropical cyclones have at least one convective burst event and that convective burst events usually occur during the intensification phase of the storm life cycle. Latent and sensible heat flux estimates and a measure of upper-ocean energy utilization were calculated for the inner-core (