Electric Field Profiles Over Hurricanes,Tropical Cyclones, And Thunderstorms With An Instrumented ER-2 Aircraft
Over the past several years, we have flown a set of calibrated electric field meters (FMs)on the NASA high altitude ER-2 aircraft over many oceanic and land-based storms. These included tropical oceanic cyclones and hurricanes in the Caribbean and Atlantic ocean during the Third and Fourth Convection And Moisture Experiment (CAMEX-3, 1998; CAMEX-4, 2001), thunderstorms in Florida during the Texas Florida Underflight (TEFLUN-B, 1998) experiment, tropical thunderstorms in Brazil during the Tropical Rainfall Measuring Mission – Large Scale Biosphere-Atmosphere Experiment in Amazonia (TRMM LBA, 1999), and finally, hurricanes and tropical cyclones in the Caribbean and Western Pacific during the Tropical Cloud Systems and Processes (TCSP, 2005)mission. With these various missions we have over 50 sorties that provide unique insights into the different electrical environments, evolution and activities occurring in and around these various types of storms. In general, the electric fields over the tropical oceanic storms and hurricanes were less than a few kilovolts per meter at the ER-2 altitude, while the lightning rates were low. Land-based thunderstorms often produced high lightning activity and correspondingly higher electric fields. The logarithmic mean peak fields of land based storms (843 V m -1 ) was twice that of ocean based storms (423 V m -1 ) while mean lightning counts for land storms (21.4) were almost six times those of oceanic storms (3.7).
Douglas M. Mach Richard J. Blakeslee Monte G. Bateman Jeffery C. Bailey
University of Alabama in Huntsville, Huntsville, AL, 35899, U.S.A NASA Marshall Space Flight Center, Huntsville, AL, 35812, U.S.A Universities Space Research Association, Huntsville, AL, 35805, U.S.A Raytheon ITSS, Huntsville, AL, 35805, U.S.A
国际会议
第13届国际大气电学会议(The 13th International Conference on Atmospheric Electricity)
北京
英文
2007-08-13（万方平台首次上网日期，不代表论文的发表时间）