Chubb Limited Annual Report 2020
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Genesis of Twin Tropical Cyclones As Revealed by a Global Mesoscale
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 117, D13114, doi:10.1029/2012JD017450, 2012 Genesis of twin tropical cyclones as revealed by a global mesoscale model: The role of mixed Rossby gravity waves Bo-Wen Shen,1,2 Wei-Kuo Tao,2 Yuh-Lang Lin,3 and Arlene Laing4 Received 12 January 2012; revised 26 April 2012; accepted 29 May 2012; published 12 July 2012. [1] In this study, it is proposed that twin tropical cyclones (TCs), Kesiny and 01A, in May 2002 formed in association with the scale interactions of three gyres that appeared as a convectively coupled mixed Rossby gravity (ccMRG) wave during an active phase of the Madden-Julian Oscillation (MJO). This is shown by analyzing observational data, including NCEP reanalysis data and METEOSAT 7 IR satellite imagery, and performing numerical simulations using a global mesoscale model. A 10-day control run is initialized at 0000 UTC 1 May 2002 with grid-scale condensation but no sub-grid cumulus parameterizations. The ccMRG wave was identified as encompassing two developing and one non-developing gyres, the first two of which intensified and evolved into the twin TCs. The control run is able to reproduce the evolution of the ccMRG wave and thus the formation of the twin TCs about two and five days in advance as well as their subsequent intensity evolution and movement within an 8–10 day period. Five additional 10-day sensitivity experiments with different model configurations are conducted to help understand the interaction of the three gyres, leading to the formation of the TCs. These experiments -
February 2020 Ajet
AJET News & Events, Arts & Culture, Lifestyle, Community FEBRUARY 2020 Riding the Jiu-Jitsu Wave Working for the Kyoryokutai The Changing Colors of the Red and White Singing Battle Journey Through Magic Embarrassing Adventures of an Expat in Tokyo The Japanese Lifestyle & Culture Magazine Written by the International Community in Japan1 In response to ongoing global news, the team at Connect Magazine would like to acknowledge the devastating impact of the 2019-2020 bushfires in Australia. Our thoughts and support are with those suffering. 2 Since September 2019, the raging fires across the eastern and southeastern Australian coastal regions have burned over 17.9 million acres, destroyed over 2000 homes, and killed least 27 people. A billion animals have been caught in the fires, with some species now pushed to the brink of extinction. Skies are reddened from air heavy with smoke— smoke which can be seen 2,000km away in New Zealand and even from Chile, South America, which is more than 11,000km away. Currently, massive efforts are being taken to tackle the bushfires and protect people, animals, and homes in the vicinity. If you would like to be a part of this effort, here are some resources you can use to help: Country Fire Authority Country Fire Service Foundation In Victoria In South Australia New South Wales Rural The Australian Red Cross Fire Service Fire recovery and relief fund World Wildlife Fund GIVIT Caring for injured wildlife and Donating items requested by habitat restoration those affected The Animal Rescue Collective Craft Guild Making bedding and bandaging for injured animals.