Abstract:
A study had been conducted to investigate the associations between oceanographic and meteorological conditions on the development of the Typhoon Tingling"- the 23rd tropical cyclone of 2004 in the northwestern part of the Pacific Ocean. Several satellite images were used in this investigation, including those from GMS-5 which show the cloud patterns; those from DMSP / SSM/I along with QuikSCAT / SeaWinds which display the wind data near the sea surface level; and those from TFWIM / TMI which imply the sea surface temperature together with the rate of rainfalls in all oceans. Moreover, the weather charts and upper wind maps at the levels of 850 hPa, 500 hPa and 200 hPa were analysed in this study. According to the results, several factors were found to induce suitable conditions for the development of this tropical cyclone. The oceanographic factor was the sea surface temperature over 26.5 degree Celsius, the meteorological factors were the extending ridge of a high pressure cell from China, the circulation of air masses, high humidity and the convective cloud formation. Having examined the track of the storm, an extending high pressure from China, a front, the easterly winds, and an upper trough as well as an anticyclonic circulation of air mass in mid-latitude were identified to be responsible factors. This storm dissipated once it had moved ashore due to high mountain ranges and lower moisture over the continent For the attempt to determine its center together with its severity by the Dvorak technique, it was found that Typhoon "Lingling" has the Cl - Number (Current Intensity Number) of 6.0 while the maximum mean wind speed is 115 knots and this storm was tracked westward. In addition, the analyses of wind speeds at the sea surface level around this storm had been employed. The maximum wind speed was on the right side of the front of this storm whilst the area where the heaviest rainfall occurred was on the left side at the back of this storm.