S238 Indian Ocean Basin Tropical Cyclones and Their Effect on the Madden–Julian Oscillation

Sunday, 12 January 2020
Megan Geyer, Univ. of Illinois at Urbana–Champaign, Champaign, IL; and J. Lara and D. A. Hence

The relationship between tropical cyclone (TC) location and intensity have been well analyzed over the years. Studies have found that depending on the location of TC the lifespan will peak at a certain latitude and then begin to weaken. Previous studies although hold conflicting ideas on whether size and intensity have a positive or negative relationship. Though those studies focus primarily on the Western North Pacific, this project will focus solely on the Northern and Southern Indian Ocean Basins by utilizing data from the International Best Track Archive for Climate Stewardship (IBTrACS). Past research proved that TC proximity to the equator directly impacts various natural phenomena. This study intends to further explore the relationship between intensity and size with respect to latitude and analyze the effect those factors have on the Madden-Julian Oscillation (MJO). Statistical analysis will be done of the TC's size and intensity in relation to its latitude in separate quadrants in the Northern and Southern Indian Ocean. Preliminary results indicate patterns in TC occurrences in terms of latitude and intensity. Further analysis aims to determine whether these patterns have an influence on the MJO phases.
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