Dr.Babu, C A; Jayakrishnan, P R(Taylor & Francis,http://www.tandfonline.com/loi/tres20, December 12, 2012)
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Abstract:
This study attempted to quantify the variations of the surface marine atmospheric
boundary layer (MABL) parameters associated with the tropical Cyclone Gonu formed
over the Arabian Sea during 30 May–7 June 2007 (just after the monsoon onset).
These characteristics were evaluated in terms of surface wind, drag coefficient, wind
stress, horizontal divergence, and frictional velocity using 0.5◦ × 0.5◦ resolution Quick
Scatterometer (QuikSCAT) wind products. The variation of these different surface
boundary layer parameters was studied for three defined cyclone life stages: prior
to the formation, during, and after the cyclone passage. Drastic variations of the
MABL parameters during the passage of the cyclone were observed. The wind strength
increased from 12 to 22 m s−1 in association with different stages of Gonu. Frictional
velocity increased from a value of 0.1–0.6 m s−1 during the formative stage of the
system to a high value of 0.3–1.4 m s−1 during the mature stage. Drag coefficient
varied from 1.5 × 10−3 to 2.5 × 10−3 during the occurrence of Gonu. Wind stress
values varied from 0.4 to 1.1 N m−2. Wind stress curl values varied from 10 × 10−7 to
45 × 10−7 N m−3. Generally, convergent winds prevailed with the numerical value of
divergence varying from 0 to –4 × 10−5 s−1. Maximum variations of the wind parameters
were found in the wall cloud region of the cyclone. The parameters returned to
normally observed values in 1–3 days after the cyclone passage
Description:
International Journal of Remote Sensing
Vol. 34, No. 7, 10 April 2013, 2417–2431