TY - JOUR
T1 - Warm ocean anomaly, air sea fluxes, and the rapid intensification of tropical cyclone Nargis (2008)
AU - Lin, I. I.
AU - Chen, Chi Hong
AU - Pun, Iam Fei
AU - Liu, W. Timothy
AU - Wu, Chun Chieh
PY - 2009/2/16
Y1 - 2009/2/16
N2 - On 2 May 2008, category-4 tropical cyclone Nargis devastated Myanmar. It was observed that just prior to its landfall, Nargis rapidly intensified from a weak category-1 storm to an intense category-4 storm within only 24 h. Using in situ ocean depth-temperature measurements and satellite altimetry, it is found that Nargis' rapid intensification took place on a pre-existing warm ocean anomaly in the Bay of Bengal. In the anomaly, the subsurface ocean is evidently warmer than climatology, as characterized by the depth of the 26°C isotherm of 73-101 m and the tropical cyclone heat potential of 77-105 kj cm -2. This pre-existing deep, warm subsurface layer leads to reduction in the cyclone-induced ocean cooling, as shown from the ocean mixed layer numerical experiments. As a result, there was a near 300% increase in the air-sea enthalpy flux to support Nargis' rapid intensification.
AB - On 2 May 2008, category-4 tropical cyclone Nargis devastated Myanmar. It was observed that just prior to its landfall, Nargis rapidly intensified from a weak category-1 storm to an intense category-4 storm within only 24 h. Using in situ ocean depth-temperature measurements and satellite altimetry, it is found that Nargis' rapid intensification took place on a pre-existing warm ocean anomaly in the Bay of Bengal. In the anomaly, the subsurface ocean is evidently warmer than climatology, as characterized by the depth of the 26°C isotherm of 73-101 m and the tropical cyclone heat potential of 77-105 kj cm -2. This pre-existing deep, warm subsurface layer leads to reduction in the cyclone-induced ocean cooling, as shown from the ocean mixed layer numerical experiments. As a result, there was a near 300% increase in the air-sea enthalpy flux to support Nargis' rapid intensification.
UR - http://www.scopus.com/inward/record.url?scp=62749187237&partnerID=8YFLogxK
U2 - 10.1029/2008GL035815
DO - 10.1029/2008GL035815
M3 - 期刊論文
AN - SCOPUS:62749187237
SN - 0094-8276
VL - 36
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 3
M1 - L03817
ER -