Phase locking between atmospheric convectively coupled equatorial Kelvin waves and the diurnal cycle of precipitation over the Maritime Continent

Baranowski, Dariusz, Flatau, Maria, Flatau, Piotr and Matthews, Adrian (2016) Phase locking between atmospheric convectively coupled equatorial Kelvin waves and the diurnal cycle of precipitation over the Maritime Continent. Geophysical Research Letters, 43 (15). 8269–8276. ISSN 0094-8276

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Abstract

Convectively coupled Kelvin waves (CCKWs) are a major component of the tropical atmospheric circulation, propagating eastward around the equatorial belt. Here we show there are scale interactions between CCKWs and the diurnal cycle over the Maritime Continent. In particular, CCKW packets that pass a basepoint in the eastern Indian Ocean at 90E between 0600-0900 UTC subsequently arrive over Sumatra in phase with the diurnal cycle of convection. As the distance between Sumatra and Borneo is equal to the distance travelled by a CCKW in one day, these waves are then also in phase with the diurnal cycle over Borneo. Consequently, this subset of CCKWs has a precipitation signal up to a factor of 3 larger than CCKWs that arrive at other times of the day, and a 40% greater chance of successfully traversing the Maritime Continent.

Item Type: Article
Faculty \ School: Faculty of Science > School of Mathematics
Faculty of Science > School of Environmental Sciences
Depositing User: Pure Connector
Date Deposited: 24 Sep 2016 00:12
Last Modified: 11 Jun 2020 00:03
URI: https://ueaeprints.uea.ac.uk/id/eprint/59910
DOI: 10.1002/2016GL069602

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