HRD Monthly Science Meeting of October 2017

October’s science meeting consisted of 5 presentations: Gus Alaka – 2017 Basin-Scale HWRF Preliminary Verification Sim Aberson – IFS (EC) and GFS Forecasts During 2017 Sim Aberson – Extreme Horizontal and Vertical Winds Measured by Dropwindsondes During the 2017 Hurricane Field Program Lisa Bucci – P-3 Doppler Wind Lidar: 2017 Progress Heather Holbach – WSRA …

HRD Debrief for missions into Hurricanes Irma, Jose, and Maria – Part 1 – 4 October 2017

HRD researchers discussed the results from the 8 P-3 and 8 G-IV missions into Hurricane Irma (3-8 September 2017). The agenda for the discussion was: Missions Overview (Reasor) Science Discussions 20170903H1 TDR (Jon Zawislak) 20170904H1 TDR (Rob Rogers) 20170904H2 TDR (Jon Zawislak) 20170905H1 TDR (Rob Rogers) 20170905H2 TDR (Jon Zawislak) 20170908H1 TDR (Jon Zawislak) 20170908H2 …

Paper on the likely impact of the new COSMIC satellites on weather forecasts published in Monthly Weather Review

The Constellation Observing System for Meteorology, Ionosphere, and Climate COSMIC) is a set of satellites launched in 2006 that orbit the earth about 500 miles above ground. They use radio signals from Global Positioning System (GPS) satellites in a process called “radio occultation” to accurately measure temperature and moisture at a large number of points in …

HRD Seminar – Dr. David Ryglicki, Naval Research Laboratory – 17 August 2017

Dr. Ryglicki presented a seminar titled  “The Kinematics of Rapidly Intensifying Hurricanes in Moderate Vertical Wind Shear”. Abstract: A select group of tropical cyclones (TCs) which unexpectedly undergo rapid intensification in moderate vertical wind shear are identified, analyzed, and modeled. Geostationary satellite and reanalysis data are used to identify features and environmental parameters of these TCs. …

Paper on how vertical wind shear impacts surface winds in hurricanes published in Monthly Weather Review

Summary: Scatterometers are instruments on aircraft or satellites that are used to measure wind speed and direction at the ocean surface. In this follow-up to a 2016 study, the surface wind in tropical cyclones around the world are studied using a large set of measurements from 2000 to 2011. The impact of tropical cyclone intensity, …

HRD Monthly Science Meeting of May 2017

May’s science meeting consisted of 3 presentations: Jonathan Zawislak: Validation of tropical cyclone precipitation in HWRF using satellite observations Hua Chen - Azimuthal distribution of deep convection, environmental factors, and tropical cyclone rapid intensification: A perspective from HWRF ensemble forecasts of Hurricane Edouard Stephanie Stevenson (University of Albany/SUNY): Understanding intensity changes signaled by tropical cyclone lightning …

Paper on gravity waves caused by hurricanes and a potential new way to estimate hurricane intensity published in Geophysical Research Letters

 Summary: Observing tropical cyclones around the world can be very expensive because they occur over oceans where there are few observations. Hurricane Hunter aircraft can reach hurricanes only when they are close to land. Thunderstorms near the centers of tropical cyclones cause waves (called “gravity waves”) in the atmosphere that move outward in spiral …

HRD researchers at 71st Interdepartmental Hurricane Conference/Tropical Cyclone Research Forum, Miami, FL – 14-16 March 2017

HRD and AOML scientists participated in the 71st Interdepartmental Hurricane Conference/Tropical Cyclone Operations and Research Forum. HRD scientists presented or were coauthors on 14 of the 45 presentations and 3 of the 10 posters. Shirley Murillo chaired the Joint Hurricane Testbed (JHT) session and Sundararaman Gopalakrishnan chaired a panel discussion on “Research Supporting Operations: Current …