|
Typhoon Dolphin, known in the Philippines as Typhoon Ulysses, was the 22nd Tropical Storm and the 11th Typhoon to be monitored by the Japan Meteorological Agency. Dolphin was also the 27th Tropical Depression, 25th Tropical Storm as well as the 12th Typhoon to be monitored by the Joint Typhoon Warning Center during the 2008 Pacific typhoon season. The only impact that was reported from Typhoon Dolphin was to the M/Bca Mae Jan, which was a cargo passenger ship which sank on December 14, due to rough seas caused by Typhoon Dolphin. There were 46 people reported dead while seven were reported as missing. Typhoon Dolphin formed as a Tropical Depression early on December 8, 2008 to the northwest of Kwajalein Atoll in the Marshall Islands. Over the next few days as the depression moved towards the west, the depression slowly intensified into a Tropical Storm being named Dolphin by the JMA on December 12. The next day as Tropical Storm Dolphin moved into PAGASA's area of responsibility, it was assigned the local name of Ulysses. Dolphin was then upgraded to a Typhoon the next day and reached its peak winds off 65 kts (75 mph; 120 km/h 10-minute winds) and 90 kts (105 mph; 165 km/h 1-minute winds) later that day. On December 17, as Typhoon Dolphin was approaching the edge of PAGASA's Area of responsibility, it was downgraded to a tropical storm by both the JMA and the JTWC. Tropical Storm Dolphin was then declared as extratropical the next day as it moved towards the northeast. ==Meteorological history== On December 2, the Japan Meteorological Agency (JMA) began to issue gale warnings on a new-born extratropical cyclone around the Ogasawara Islands, and JMA started to issue storm warnings when the system accelerated eastward on the next day. The storm reached storm-force and attained its extratropical peak intensity with 10-minute maximum sustained winds of 60 knots (110 km/h, 70 mph) on December 4, when it was located far east of Japan; however, the low became developed late on the same day. The storm north of Wake Island started to track east-southeastward on December 5, as well as it tracked southeastward then southward on December 6. At noon, it became a developing low again and reached its extratropical peak intensity for the second time, before it moved into the tropics. On December 7, the storm started to track southwestward and weakened into a gale-force system; eventually, the system transformed into a tropical depression southeast of Wake Island early on December 8. However, early the next day, the JMA downgraded the depression to a low pressure area, as the depression's low level circulation center was partially exposed, and was in an area of moderate to high vertical wind shear. However the JMA re-upgraded the disturbance to a weak tropical depression 24 hours later. At 0600 UTC that morning, the Joint Typhoon Warning Center (JTWC), released a significant tropical weather advisory and rated the chances of the disturbance becoming a significant tropical cyclone within 24 hours as poor, due to a quikscat pass had shown that the low level circulation center had broken down into a wave. However, after the advisory was released the low level circulation center started to rapidly consolidate, and thus the JTWC initiated issuing warnings at 1200 UTC, December 10, and designated it as Tropical Depression 27W, while it was about to the east of Guam and moving towards the west. Early the next day the depression's centre passed about to the south of Guam and made its closest approach. The JTWC upgraded the depression to a Tropical Storm late the next day and then early on December 12 the JMA designated the depression as a full tropical depression.〔(【引用サイトリンク】publisher=Joint Typhoon Warning Center )〕〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕 The Tropical Depression was then upgraded to a Tropical Storm and named Dolphin later that morning as it moved westwards towards the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) area of responsibility.〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕〔(【引用サイトリンク】publisher=Philippine Atmospheric, Geophysical and Astronomical Services Administration )〕 The next day as Tropical Storm Dolphin moved into PAGASA's area of responsibility, PAGASA assigned the local name of Ulysses to Dolphin.〔(【引用サイトリンク】publisher=Philippine Atmospheric, Geophysical and Astronomical Services Administration )〕 The JMA upgraded Tropical Storm Dolphin to a Severe Tropical Storm late on December 14.〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕 Whilst Dolphin was upgraded to a Typhoon by the JTWC early the next day as Dolphin recurved towards the North.〔(【引用サイトリンク】publisher=Joint Typhoon Warning Center )〕 Later that day the JTWC reported that Typhoon Dolphin had reached its peak winds of 90 kts (105 mph; 165 km/h 1-minute winds) which made Typhoon Dolphin a category two Typhoon on the Saffir Simpson Hurricane Scale.〔(【引用サイトリンク】publisher=Joint Typhoon Warning Center )〕 At the same time the JMA reported that Severe Tropical Storm Dolphin had intensified into a Typhoon and had also reached its peak wind speeds of 65 kts (75 mph; 120 km/h 10-minute winds).〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕 Early in the afternoon of December 16, the JMA downgraded Typhoon Dolphin from a Typhoon to a Severe Tropical Storm, as it moved towards the northwest.〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕 This came as the JTWC reported that Dolphin had weakened into a Category One Typhoon.〔 Early the next day the JTWC downgraded Typhoon Dolphin to a Tropical Storm, whilst later that day the JMA also downgraded Dolphin to a Tropical Storm.〔〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕 This came as Tropical Storm Dolphin moved out of PAGASA's Area of responsibility.〔(【引用サイトリンク】publisher=Philippine Atmospheric, Geophysical and Astronomical Services Administration )〕 Early in the afternoon of December 18, both the JMA and the JTWC released their final advisories on Tropical Storm Dolphin as they downgraded Dolphin to an extratropical low.〔(【引用サイトリンク】publisher=Japan Meteorological Agency )〕〔(【引用サイトリンク】publisher=Joint Typhoon Warning Center )〕 The extratropical low dissipated two days later.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Typhoon Dolphin (2008)」の詳細全文を読む スポンサード リンク
|