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Cyclone Paula
Cyclone Paula (RSMC Nadi designation: 09F, JTWC designation: 13P) was a tropical cyclone which caused extensive damage to areas of Vanuatu. The cyclone was the second cyclone and only severe tropical cyclone of the relatively inactive 2000–01 South Pacific cyclone season. Cyclone Paula developed from an area of disturbed weather embedded within a monsoon trough on February 25, 2001, near Vanuatu. Situated in an area of favorable conditions, Paula steadily intensified as it moved in a general direction towards the southeast. On March 1, Paula reached peak intensity with winds of , sustained for ten minutes. However, the cyclone began to accelerate further to the southeast into more unfavorable conditions. As a result, Paula quickly weakened, and thus degenerated into an extratropical cyclone on March 4.
==Meteorological history==
The low pressure area that would eventually develop into Cyclone Paula was first identified at 1800 UTC on February 25, embedded within a monsoon trough south of Espiritu Santo, Vanuatu. At the time, the system was positioned under an upper–level outflow center and located in an area of warm sea surface temperatures (SSTs) of about 30 °C (86 °F). Early the next day, a sharp increase in oceanic heat content triggered a rapid burst of convection in the northern and eastern quadrants of the system. Associated rainbands also began to increasingly curve toward the circulation center of the low pressure area. An expanding circulation center and persistently deep convection allowed barometric pressures within the system to steadily fall. QuikSCAT and SSM/I data indicated that winds of gale force were persisting in northeastern areas of the system. As a result, the storm system was upgraded to cyclone status and was given the name ''Paula'' at 1200 UTC on February 26 by the Regional Specialized Meteorological Center in Nadi, Fiji (RSMC Nadi).〔 The Joint Typhoon Warning Center (JTWC) also began to track the system, issuing its first cyclone warning on the same day at 1500 UTC, noting at the cyclone's persistent deep convection. At the time of its naming, Cyclone Paula was moving towards the southeast at .〔
In an area of weak steering currents, Paula began to move in a small, clockwise loop.〔 Quickly intensifying under favorable conditions and an environment of low wind shear, the cyclone reached Category 2 status on the Australian cyclone scale at 0000 UTC on February 27, with winds of , sustained for ten minutes.〔 After completing its small cyclonic loop, the cyclone developed a small central dense overcast (CDO), containing a ragged eye. Throughout the day the eye became increasingly better defined as the cyclone accelerated towards the southeast. Still strengthening, Cyclone Paula moved across the Vanuatu island chain, making landfall just north of Port Vila, Vanuatu at 1200 UTC on February 28 with winds of , sustained for ten minutes. After passing Vanuatu, Paula moved towards Fiji, quickly passing the island to the south.〔 The cyclone made its closest pass to Fiji at 1800 UTC on March 1, south-southwest of Kadavu Island. Operationally, it was believed that Paula peaked at intensity at this time according to RSMC Nadi with ten-minute sustained winds of ,〔 but this was revised to and a minimum barometric pressure of in post-season analysis.〔〔
After passing to the south of Fiji, Cyclone Paula quickly accelerated into an area of strong vertical wind shear, due to a strong northwesterly wind current. As a result, the cyclone promptly began to quickly weaken, with maximum ten-minute sustained winds dropping by in 30 hours. After passing south of Tonga,〔 Cyclone Paula moved into the Tropical Cyclone Warning Center in Wellington, New Zealand's (TCWC Wellington) area of responsibility. Still weakening, Paula transitioned into an extratropical cyclone at 0600 UTC on March 4,〔 east–northeast of the northern tip of New Zealand.〔 The JTWC subsequently issued their final warning on the system at 1200 UTC, later that day.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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