| RAMMB CIRA 2nd Quarter Report |
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January February March 2008
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Infrared imagery (4km Mercator) from the RAMMB/CIRA tropical cyclone IR image archive of Hurricanes Charlie, Ivan, Frances, Wilma, Katrina, and Dennis, and the FORTRAN90 data module were provided to Prof. K. Walsh (Univ. Melbourne, AU) for his studies. Prof. Walsh is working on the validation of IR-based methods used to estimate the radius of maximum winds (RMW) in tropical cyclones. Recent publications by RAMM/CIRA and CIMSS discussing other methods of RMW estimation were also provided to aid his studies. (J. Knaff)
A one-day tropical cyclone workshop involving RAMMB and CIRA/CSU tropical cyclone researchers and NCAR scientists was held at the NCAR Foothills Lab in Boulder, CO. The goal of this workshop was to foster better communication and joint collaborations on tropical cyclone research between RAMMB/CSU Atmospheric Science and NCAR. Several researchers from CIRA and RAMMB gave informal presentations on tropical cyclone research and participated in collaborative discussions during the workshop. (M. DeMaria, J. Knaff, A. Schumacher, R. Zehr)
AMSU-based tropical cyclone products were provided to P. Harr (NPS, Monterey) for Typhoon Man-Yi (wp042007). Man-Yi experienced a transition from a tropical cyclone to an extra-tropical cyclone on 12-14 July 2007. P. Harr is using these AMSU products to diagnose the structural changes occurring during extra-tropical transition. This is one of the key components of the THORPEX Pacific-Asian Regional Campaign (T-PARC) field experiment, slated for this coming summer. (J. Knaff)
The ingest and processing code used to estimated tropical cyclone intensity and structure from AMSU-A was provided to P. Harr (Naval Postgraduate School) for his work on studying the transformation of tropical cyclones to extratropical cyclones. Past data exchanges have show that the AMSU retrievals and derived profiles of wind temperature and height are useful for the study of the structural evolution that occurs during this process. Pat is one of the key organizers of the upcoming THORPEX Pacific-Asian Regional Campaign (T-PARC) field experiment. (J. Knaff)
The next generation Statistical Typhoon Prediction Scheme (STIPS) developmental dataset was provided to J. Kossin (CIMSS). The new STIPS developmental dataset includes storm relative information from infrared imagery (much of which came from J. Kossin) and oceanic heat content provided by G. Goni AOML. This new dataset is the basis for a new model that is being developed for testing at JTWC. J. Kossin plans use the dataset to extend his secondary eyewall formation index work into the western North Pacific tropical cyclone basin. (J. Knaff)
Additional information about applying the Knaff & Zehr tropical cyclone wind-pressure relationship was provided to G. Cooke a savanna ecologist at CSIRO.