DeMaria, Zehr, Hilgendorf, Knaff,
Research continues on environmental vertical wind shear influences
on hurricane intensity change. An outline of a paper for journal
article submission was completed. A paper entitled, "Improving the
Quantitative Assessment of Vertical Wind Shear on Tropical Cyclone Intensity
Change," by R. Zehr was submitted to the 23rd conference on Hurricanes
and Tropical Meteorology. It will be given as an oral presentation,
January 11 at the AMS Conference in Dallas, TX.
Advanced Microwave Sounder Unit (AMSU) data along with comparative
data is being analyzed in a joint project with Stan Kidder (CIRA) and Mitch
Goldberg (NESDIS ORA). AMSU passes from Hurricanes Bonnie, Georges,
and Mitch, and Super typhoon Zeb have been collected along with GOES imagery
and coinciding intensity and surface wind information. AMSU 89 and 150
Ghz images have been analyzed and vertical cross section of soundings in
a temperature anomaly format were generated. A rough outline and plan for
an initial journal article on this work has been discussed.
Research on tropical cyclone intensity forecasting is continuing.
A paper entitled "Incorporation of Aircraft Observations in a Statistical
Hurricane Intensity Prediction Scheme" has been accepted for oral presentation
at the AMS Conference in Dallas, TX in January 1999. Water vapor
imagery and GOES sounder products from the 1997 and 1998 hurricane seasons
are being prepared for a study of tropical cyclone genesis.
A new project is underway with CIRA support to get all available
tropical cyclone geostationary (excluding SRSO) IR imagery into a common
format on CD-ROM to improve data processing for applications testing and
technique development purposes. Many studies are often not completed due
to inefficient access to large data samples on tape storage. This
data set will alleviate that problem. The data set is from a combination
of Tropical RAMSDIS and CIRA archives, and include tropical cyclones in
the Pacific, and Atlantic from GMS and Meteosat imagery as well as GOES.
As of December 14, the initial version of the archive contains more than
5000 images with 35 tropical cyclones, (22 in the Atlantic region, from
Research continues with the use of SRSO (1-min) data sets.
The overall objectives are: 1) to improve understanding of tropical cyclone
intensity and structure change, and 2) to develop satellite products and
techniques for tropical cyclone forecasting. Observational analysis includes
1-min GOES-9 (at 90W) images archived at CIRA, 10-sec "Hurricane Hunter"
aircraft observations, (obtained from NOAA HRD), and high density satellite
wind sets (obtained from CIMSS). Kelly Findeisen (CSU) has completed
detailed upper level wind analyses from two consecutive days of Hurricane
Marilyn (1995) and is working on the third day's data set. John Knaff is
working with aircraft and 1-min satellite data from Hurricane Luis (1995).
R. Zehr contributed to a chapter in of a report on WMO Sub-Project
No. 19 "Estimating the Amount of Precipitation Associated with Tropical
Cyclones Using Satellite Data", Professor Eric Barrett, Chief Editor.
The report is in the form of a book on satellite applications for tropical
cyclone analysis. Ray is a co-author with Mohan Karayampudi (NASA)
of Chapter 2 called "Tropical Cyclone Structure and Dynamics."
Data for the 1998 Atlantic/ Pacific Tropical Cyclone Season:
A fairly detailed tropical cyclone data set was constructed for the 1998
summer months. Beginning in mid August, data include high density
winds from the University of Wisconsin, European Research Satellite Scatterometer
derived surface winds, and half-hour GOES/ Meteosat/ GMS IR images remapped
to a Mercator Projection for 19 selected hurricanes.
Return to the RAMM-CIRA Quarterly
Report home page
Hurricane animation from GOES was provided to University
Corporation for Atmospheric Research (UCAR) Communications, in Boulder
CO. They were provided GOES images of Hurricanes Luis, Bonnie, and
Georges from the CIRA archive to record high quality videos of the satellite
loops. They used it for educational material in Vol. 4 of Climate Stock
entitled Hurricane Weather Events.