Accession Number : ADA300104

Title :   A Study of Lightning Activity Over the Warm Pool Western Pacific Ocean (Toga-Coare Region) for 1993.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Rios, Luis A.

PDF Url : ADA300104

Report Date : 10 SEP 1995

Pagination or Media Count : 108

Abstract : The warm pool western Pacific Ocean is an area of the equatorial tropics characterized by strong and frequent convection, and vigorous lightning activity. However, it has been noted by various researchers that the vast oceanic expanses experience less lightning activity than adjacent land masses by as much as one order of magnitude. A report herein presents a look at the characteristics of lightning as recorded by three individual magnetic direction finders (DF' s) at the Kapingamarangi Atoll, Rabaul, and Kavieng deployed to the Tropical Ocean Global Atmosphere Coupled Ocean-Atmosphere Response Experiment (TOGA-COARE). The lightning data recorded by each DF are azimuthally separated into "land" and "ocean" sectors in an effort to assess each regimes similarities and differences. In addition to analyzing some of the more typical lightning parameters (e.g., percentage of positive lightning and positive and negative multiplicities), the thermodynamic relationships between convective available potential energy (CAPE), wet-bulb potential temperature, and flash rates are examined. Finally, the lightning data are run through time series methods in an attempt to both better describe the data and to appraise any possible link between lightning activity and the Madden-Julian Oscillation (MJO) through the use of an appropriately constructed band-pass filter.

Descriptors :   *LIGHTNING, *MARINE CLIMATOLOGY, EQUATORIAL REGIONS, MAGNETIC FIELDS, THERMODYNAMICS, TIME SERIES ANALYSIS, DIRECTION FINDING, WINTER, TROPICAL REGIONS, POTENTIAL ENERGY, PACIFIC OCEAN, SURFACE TEMPERATURE, BANDPASS FILTERS, DIURNAL VARIATIONS, CONVECTION(ATMOSPHERIC), TROPOPAUSE, FLASHES, WET BULB TEMPERATURE, ATOLLS, SPRING SEASON.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE