A View of Tropical Cyclones from Above: The Tropical Cyclone Intensity Experiment

AbstractTropical cyclone (TC) outflow and its relationship to TC intensity change and structure were investigated in the Office of Naval Research Tropical Cyclone Intensity (TCI) field program during 2015 using dropsondes deployed from the innovative new High-Definition Sounding System (HDSS) and remotely sensed observations from the Hurricane Imaging Radiometer (HIRAD), both on board the NASA WB-57 that flew in the lower stratosphere. Three noteworthy hurricanes were intensively observed with unprecedented horizontal resolution: Joaquin in the Atlantic and Marty and Patricia in the eastern North Pacific. Nearly 800 dropsondes were deployed from the WB-57 flight level of ∼60,000 ft (∼18 km), recording atmospheric conditions from the lower stratosphere to the surface, while HIRAD measured the surface winds in a 50-km-wide swath with a horizontal resolution of 2 km. Dropsonde transects with 4–10-km spacing through the inner cores of Hurricanes Patricia, Joaquin, and Marty depict the large horizontal and ver...

[1]  John A. Knaff,et al.  Objective Estimation of Tropical Cyclone Wind Structure from Infrared Satellite Data , 2006 .

[2]  Robbie Hood,et al.  The Saharan Air Layer and the Fate of African Easterly Waves—NASA's AMMA Field Study of Tropical Cyclogenesis , 2009 .

[3]  David S. Nolan,et al.  An Expanded Dataset of Hurricane Eyewall Sizes and Slopes , 2014 .

[4]  Hugh E. Willoughby,et al.  Objective Determination of Hurricane Tracks from Aircraft Observations , 1982 .

[5]  John A. Knox,et al.  Transverse cirrus bands in weather systems: a grand tour of an enduring enigma , 2010 .

[6]  F. Marks,et al.  Multiscale Analysis of Tropical Cyclone Kinematic Structure from Airborne Doppler Radar Composites , 2012 .

[7]  Lloyd J. Shapiro,et al.  The Response of Balanced Hurricanes to Local Sources of Heat and Momentum , 1982 .

[8]  Thomas A. Cram,et al.  Estimating Hurricane Wind Structure in the Absence of Aircraft Reconnaissance , 2007 .

[9]  Kerry Emanuel,et al.  An Air-Sea Interaction Theory for Tropical Cyclones. Part I: Steady-State Maintenance , 1986 .

[10]  Shuyi S. Chen,et al.  Impact of typhoons on the ocean in the pacific , 2014 .

[11]  K. Emanuel.  Self-Stratification of Tropical Cyclone Outflow. Part II: Implications for Storm Intensification , 2012 .

[12]  S. Braun,et al.  NASA’s Hurricane and Severe Storm Sentinel (HS3) Investigation , 2016 .

[13]  Greg J. Holland,et al.  On the dynamics of tropical cyclone structural changes , 1984 .

[14]  Mark D. Powell,et al.  NOAA'S Hurricane Intensity Forecasting Experiment: A Progress Report , 2012 .

[15]  James L. Franklin,et al.  The NCAR GPS Dropwindsonde , 1999 .

[16]  Greg Michael McFarquhar,et al.  Nasa's tropical cloud systems and processes experiment : Investigating tropical cyclogenesis and hurricane intensity change , 2007 .

[17]  Asaro,et al.  The interactions between typhoons and the ocean vary greatly depending on the properties of the storm and of the ocean. IMPACT OF TYPHOONS ON THE OCEAN IN THE PACIFIC , 2014 .

[18]  Mingjing Tong,et al.  Hurricane Weather Research and Forecasting (HWRF) Model: 2015 Scientific Documentation , 2012 .

[19]  C. Velden,et al.  The Tropical Cyclone Diurnal Cycle of Mature Hurricanes , 2014 .

[20]  R. T. Merrill.  Environmental Influences on Hurricane Intensification , 1988 .

[21]  Russell L. Elsberry,et al.  Tropical Cyclone Center Positions from Sequences of HDSS Sondes Deployed along High-Altitude Overpasses , 2017 .

[22]  S. Aberson,et al.  REWRITING THE TROPICAL RECORD BOOKS The Extraordinary Intensification of Hurricane Patricia (2015) , 2017 .

[23]  R. Sibson,et al.  A brief description of natural neighbor interpolation , 1981 .

[24]  Naomi Surgi,et al.  The Intensity Forecasting Experiment: A NOAA Multiyear Field Program for Improving Tropical Cyclone Intensity Forecasts , 2006 .

[25]  R. T. Merrill.  Characteristics of the Upper-Tropospheric Environmental Flow around Hurricanes , 1988 .

[26]  D. Cecil,et al.  Hurricane Imaging Radiometer (HIRAD) Wind Speed Retrievals and Validation Using Dropsondes. , 2017, Journal of atmospheric and oceanic technology.

[27]  R. Rotunno,et al.  An air-sea interaction theory for tropical cyclones [presentation] , 1985 .

[28]  William A. Komaromi,et al.  Tropical Cyclone Outflow and Warm Core Structure as Revealed by HS3 Dropsonde Data , 2017 .

[29]  L. Uccellini.  Processes Contributing to the Rapid Development of Extratropical Cyclones , 1990 .

[30]  Daniel P. Stern,et al.  Extreme Low-Level Updrafts and Wind Speeds Measured by Dropsondes in Tropical Cyclones , 2016 .

[31]  P. Black,et al.  Real-Time Upper-Ocean Temperature Observations from Aircraft during Operational Hurricane Reconnaissance Missions: AXBT Demonstration Project Year One Results , 2013 .

[32]  Michael C. Morgan,et al.  The Impact of Outflow Environment on Tropical Cyclone Intensification and Structure , 2011 .

[33]  Xuguang Wang,et al.  Incorporating Ensemble Covariance in the Gridpoint Statistical Interpolation Variational Minimization: A Mathematical Framework , 2010 .

[34]  Peter G. Black,et al.  Hurricane Surface Wind Measurements from an Operational Stepped Frequency Microwave Radiometer , 2007 .

[35]  Kerry Emanuel,et al.  Self-Stratification of Tropical Cyclone Outflow. Part I: Implications for Storm Structure , 2011 .

[36]  Travis A. Smith,et al.  Tropical Cyclone Prediction Using COAMPS-TC , 2014 .

[37]  J. Molinari,et al.  Distribution of Helicity, CAPE, and Shear in Tropical Cyclones , 2010 .

[38]  M. Flatau,et al.  The Role of Outflow-Layer Instabilities in Tropical Cyclone Motion , 1993 .

[39]  B. Barrett,et al.  Evolution of the upper tropospheric outflow in Hurricanes Iselle and Julio (2014) in the Navy Global Environmental Model (NAVGEM) analyses and in satellite and dropsonde observations , 2016 .

[40]  Chris Snyder,et al.  A Hybrid ETKF-3DVAR Data Assimilation Scheme for the WRF Model. Part I: Observing System Simulation Experiment , 2008 .

[41]  J. Molinari,et al.  External Influences on Hurricane Intensity. Part I: Outflow Layer Eddy Angular Momentum Fluxes. , 1989 .

[42]  Peter G. Black,et al.  High-Definition Sounding System (HDSS) for Atmospheric Profiling , 2017 .

[43]  Jun A. Zhang,et al.  Air-sea exchange in hurricanes : Synthesis of observations from the coupled boundary layer air-sea transfer experiment , 2007 .

[44]  Mark DeMaria,et al.  A Statistical Hurricane Intensity Prediction Scheme (SHIPS) for the Atlantic Basin , 1994 .

[45]  Russell L. Elsberry,et al.  Tropical Cyclone Structure (TCS08) Field Experiment Science Basis, Observational Platforms, and Strategy , 2008 .

[46]  R. Fovell,et al.  Discrete Propagation in Numerically Simulated Nocturnal Squall Lines , 2006 .

[47]  David D. Parrish,et al.  GSI 3DVar-Based Ensemble-Variational Hybrid Data Assimilation for NCEP Global Forecast System: Single-Resolution Experiments , 2013 .

[48]  Xu Lu,et al.  GSI‐based ensemble‐variational hybrid data assimilation for HWRF for hurricane initialization and prediction: impact of various error covariances for airborne radar observation assimilation , 2017 .