The Impact Of Spaceborne Doppler Radar Observations On The Simulation Of A Tropical Cyclone

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The Impact Of Spaceborne Doppler Radar Observations On The Simulation Of A Tropical Cyclone

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Author : William E Lewis
language : en
Publisher:
Release Date : 2007

The Impact Of Spaceborne Doppler Radar Observations On The Simulation Of A Tropical Cyclone written by William E Lewis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

Hurricane Monitoring With Spaceborne Synthetic Aperture Radar

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Author : Xiaofeng Li
language : en
Publisher: Springer
Release Date : 2017-05-17

Hurricane Monitoring With Spaceborne Synthetic Aperture Radar written by Xiaofeng Li and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-17 with Nature categories.

This book discusses in detail the science and morphology of powerful hurricane detection systems. It broadly addresses new approaches to monitoring hazards using freely available images from the European Space Agency’s (ESA’s) Sentinel-1 SAR satellite and benchmarks a new interdisciplinary field at the interface between oceanography, meteorology and remote sensing. Following the launch of the first European Space Agency (ESA) operational synthetic aperture radar satellite, Sentinel-1, in 2014, synthetic aperture radar (SAR) data has been freely available on the Internet hub in real-time. This advance allows weather forecasters to view hurricanes in fine detail for the first time. As a result, the number of synthetic aperture radar research scientists working in this field is set to grow exponentially in the next decade; the book is a valuable resource for this large and budding audience.

Advanced Numerical Modeling And Data Assimilation Techniques For Tropical Cyclone Predictions

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Author : U.C. Mohanty
language : en
Publisher: Springer
Release Date : 2016-11-21

Advanced Numerical Modeling And Data Assimilation Techniques For Tropical Cyclone Predictions written by U.C. Mohanty and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-21 with Science categories.

This book deals primarily with monitoring, prediction and understanding of Tropical Cyclones (TCs). It was envisioned to serve as a teaching and reference resource at universities and academic institutions for researchers and post-graduate students. It has been designed to provide a broad outlook on recent advances in observations, assimilation and modeling of TCs with detailed and advanced information on genesis, intensification, movement and storm surge prediction. Specifically, it focuses on (i) state-of-the-art observations for advancing TC research, (ii) advances in numerical weather prediction for TCs, (iii) advanced assimilation and vortex initialization techniques, (iv) ocean coupling, (v) current capabilities to predict TCs, and (vi) advanced research in physical and dynamical processes in TCs. The chapters in the book are authored by leading international experts from academic, research and operational environments. The book is also expected to stimulate critical thinking for cyclone forecasters and researchers, managers, policy makers, and graduate and post-graduate students to carry out future research in the field of TCs.

Cloud Resolving Hurricane Initialization And Prediction Through Assimilation Of Doppler Radar Observations With An Ensemble Kalman Filter

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Author :
language : en
Publisher:
Release Date : 2009

Cloud Resolving Hurricane Initialization And Prediction Through Assimilation Of Doppler Radar Observations With An Ensemble Kalman Filter written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

This study explores the assimilation of Doppler radar radial velocity observations for cloud-resolving hurricane analysis, initialization, and prediction with an ensemble Kalman filter (EnKF). The case studied is Hurricane Humberto (2007), the first landfalling hurricane in the United States since the end of the 2005 hurricane season and the most rapidly intensifying near-landfall storm in U.S. history. The storm caused extensive damage along the southeast Texas coast but was poorly predicted by operational models and forecasters. It is found that the EnKF analysis, after assimilating radial velocity observations from three Weather Surveillance Radars-1988 Doppler (WSR-88Ds) along theGulf coast, closely represents the best-track position and intensity of Humberto. Deterministic forecasts initialized from the EnKF analysis, despite displaying considerable variability with different lead times, are also capable of predicting the rapid formation and intensification of the hurricane. These forecasts are also superior to simulations without radar data assimilation or with a threedimensional variational scheme assimilating the same radar observations. Moreover, nearly all members from the ensemble forecasts initialized with EnKF analysis perturbations predict rapid formation and intensification of the storm. However, the large ensemble spread of peak intensity, which ranges from a tropical storm to a category 2 hurricane, echoes limited predictability in deterministic forecasts of the storm and the potential of using ensembles for probabilistic forecasts of hurricanes.

Dynamics And Predictability Of Tropical Cyclones Evaluated Through Convection Permitting Ensemble Analyses And Forecasts With Airborne Radar And Sounding Observations

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Author : Erin Munsell
language : en
Publisher:
Release Date : 2016

Dynamics And Predictability Of Tropical Cyclones Evaluated Through Convection Permitting Ensemble Analyses And Forecasts With Airborne Radar And Sounding Observations written by Erin Munsell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The dynamics and predictability of various aspects of tropical cyclone track and intensity forecasting are explored through the use of real-time convection-permitting ensemble forecasts generated by a regional-scale model that employs advanced data assimilation techniques. Airborne Doppler radar observations, as well as sounding observations gathered during NASAs Hurricane and Severe Storm Sentinel (HS3) are assimilated and the resulting sensitivity and uncertainty of divergent track and intensity forecasts for three Atlantic tropical cyclones (TCs; Hurricane Sandy (2012), Hurricane Nadine (2012), and Hurricane Edouard (2014)) are explored. Ensemble members are separated into groups according to their performance and composite analyses and ensemble sensitivity techniques are employed to diagnose the sources of greatest sensitivity and uncertainty, as well as to dynamically explain the divergent behavior observed in the forecasts.The analysis of the Hurricane Sandy (2012) ensemble reveals that the divergent track forecasts result from differences in the location of Sandy that develop over the first 48-h of the simulation as a result of variance in the strength of the environmental winds that Sandy is embedded in throughout this period. Disparities in the strength and position of an approaching mid-latitude trough yield divergence in track forecasts of Hurricane Nadine (2012); an increased interaction between the mid-latitude system and the TC steers Nadine eastward, while a reduced interaction allows the TC to be steered westward ahead of the approaching trough. In addition, the inclusion of 6-h sea surface temperature (SST) updates considerably improves Nadines intensity forecasts, highlighting the importance of accurate SST fields when simulating TCs embedded in marginally favorable environmental conditions. Finally, considerable variance in the rapid intensification (RI) onset time in the Hurricane Edouard (2014) ensemble results from small distinctions in the magnitude of deep-layer shear prior to RI, which contributes to differences in the vortex tilt magnitude, the strength and location of the inner-core convection associated with the developing vortex, and the subsequent precession process.

Monitoring And Prediction Of Tropical Cyclones In The Indian Ocean And Climate Change

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Author : U.C. Mohanty
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-10-12

Monitoring And Prediction Of Tropical Cyclones In The Indian Ocean And Climate Change written by U.C. Mohanty and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-12 with Science categories.

This book deals with recent advances in our understanding and prediction of tropical cyclogenesis, intensification and movement as well as landfall processes like heavy rainfall, gale wind and storm surge based on the latest observational and numerical weather prediction (NWP) modeling platforms. It also includes tropical cyclone (TC) management issues like early warning systems, recent high impact TC events, disaster preparedness, assessment of risk and vulnerability including construction, archiving and retrieval of the best tracking and historical data sets, policy decision etc., in view of recent findings on climate change aspects and their impact on TC activity. The chapters are authored by leading experts, both from research and operational environments. This book is relevant to cyclone forecasters and researchers, managers, policy makers, graduate and undergraduate students. It intends to stimulate thinking and hence further research in the field of TCs and climate change, especially over the Indian Ocean region and provides high-quality reference materials for all the users mentioned above for the management of TCs over this region.

On The Predictability Of Tropical Cyclones Through All Sky Infrared Satellite Radiance Assimilation

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Author : Masashi Minamide
language : en
Publisher:
Release Date : 2018

On The Predictability Of Tropical Cyclones Through All Sky Infrared Satellite Radiance Assimilation written by Masashi Minamide and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

The impacts of assimilating all-sky infrared satellite radiances, in particular from the new-generation geostationary satellites GOES-R (GOES-16) and Himawari-8, for convection-permitting initialization and prediction of tropical cyclones are explored. Community Radiative Transfer Model (CRTM) is newly connected to the ensemble Kalman filter (EnKF) data assimilation system developed at Penn State University (PSU) and built around the Weather Research and Forecasting model (WRF). Adaptive Observation Error Inflation (AOEI) method and Adaptive Background Error Inflation (ABEI) method are newly proposed to alleviate the large representativeness error in assimilating all-sky satellite radiances that arises from the strong nonlinearity in the observation operator. The impacts of assimilating all-sky satellite radiances for tropical cyclone initializations are investigated through perfect and imperfect Observing System Simulation Experiments (OSSEs) and Observing System Experiments (OSEs) using multiple infrared geostationary satellites including GOES-16, Himawari-8 and GOES-13. It is found that the assimilation of the infrared radiance can accurately constrain the dynamic and thermodynamic state variables. EnKF analyses are able to capture the developing the convective systems and even the individual cells, including the convective activities within the inner-core region of tropical cyclones. Deterministic forecasts initialized from the EnKF analyses exhibit the significant improvement from the forecast without the all-sky satellite radiance assimilation, and become capable of simulating the rapid intensification of tropical cyclones. This dissertation highlights the encouraging prospects of future improvement in tropical cyclone prediction through assimilating all-sky infrared radiance from highly spatiotemporally resolving geostationary satellites.

Thriving On Our Changing Planet

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Author : National Academies of Sciences, Engineering, and Medicine
language : en
Publisher: National Academies Press
Release Date : 2019-01-20

Thriving On Our Changing Planet written by National Academies of Sciences, Engineering, and Medicine and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-20 with Science categories.

We live on a dynamic Earth shaped by both natural processes and the impacts of humans on their environment. It is in our collective interest to observe and understand our planet, and to predict future behavior to the extent possible, in order to effectively manage resources, successfully respond to threats from natural and human-induced environmental change, and capitalize on the opportunities â€" social, economic, security, and more â€" that such knowledge can bring. By continuously monitoring and exploring Earth, developing a deep understanding of its evolving behavior, and characterizing the processes that shape and reshape the environment in which we live, we not only advance knowledge and basic discovery about our planet, but we further develop the foundation upon which benefits to society are built. Thriving on Our Changing Planet presents prioritized science, applications, and observations, along with related strategic and programmatic guidance, to support the U.S. civil space Earth observation program over the coming decade.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

A Simulation Study On The Impact Of Satellite Sensed Winds On Tropical Cyclone Forecast

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Author : Simon Wei-Jen Chang
language : en
Publisher:
Release Date : 1980

A Simulation Study On The Impact Of Satellite Sensed Winds On Tropical Cyclone Forecast written by Simon Wei-Jen Chang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.

The impact of the satellite-sensed winds on the intensity forecasts of tropical cyclones is evaluated by a simulation study with an axisymmetric numerical model. The parameterized physics in the forecast model are deliberately made different from those in the model that generates the observation. The inital wind errors for the forecasts are systematic assumed to be caused entirely by the non-divergent, static initialization. Model generated 'observations are assimilated into forecasts by a 12h dynamic initialization. (Author).