Accession Number : ADA254310


Title :   Interactions of Tropical Synoptic-Scale Features as Viewed from Satellite


Descriptive Note : Master's thesis


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


Personal Author(s) : Winton, Susan E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254310.pdf


Report Date : Dec 1991


Pagination or Media Count : 110


Abstract : Tropical synoptic features - a hypothesized periodic 12 d oscillation over Central America and a 2800 km eastward propagating wave over the eastern Pacific--are examined in OLR and TOVS satellite observations. Their interactions with each other, with tropical plumes and intraseasonal oscillations are found to be weak. Time series analysis of the area-averaged (140 deg -40 deg W and 35 deg N-35 deg S) daily OLR for 1984 revealed a persistent 12 d oscillation in convective activity during dry (1 January-9 May) and wet (10 May-4 December) seasons. A spurious 7 d spike related to the amplitude of OLR values in convective regions, was removed. Composite diagrams of the phases of the oscillation (Maximum, Minimum and inflection points) revealed a preferred meridional orientation of OLR anomalies with eastward movement in the dry season and westward movement in the wet season.


Descriptors :   *METEOROLOGY , *TROPICAL REGIONS , ANOMALIES , INTERACTIONS , OBSERVATION , TIME SERIES ANALYSIS , THESES , PLUMES , OSCILLATION , CENTRAL AMERICA , SEASONS , SPIKES , CONVECTION(ATMOSPHERIC) , DIAGRAMS , TROPOSPHERE , AMPLITUDE , VALUE , REGIONS , PHASE , TIME , SEASONAL VARIATIONS , ARTIFICIAL SATELLITES


Subject Categories : Meteorology
      Unmanned Spacecraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE