温州沿海大风天气特征分析及预报指标探讨
Analysis on the Characteristics of Wenzhou Coastal Strong Wind Weather and Forecast Index
摘要:
利用温州北麂、洞头站风速资料以及NCEP再分析资料,对温州市沿海发生的大风天气进行了分析.研究发现温州沿海冬半年的大风主要由冷空气引起,初夏大风主要由倒槽和低压引起,夏季大风主要由台风引起。对引起9级以上大风的天气系统进行了分析,发现冷空气大风发生前一天850 hPa存在锋区,35˚N~45˚N间温差为16℃~26℃,地面40˚N~45˚N气压梯度为12~30 hPa;低压大风和气压梯度大的倒槽大风发生前一天850 hpa低槽的底部到达20˚N~25˚N、105˚E附近,槽前有低空急流。
Abstract:
Using wind speed data of Beiji and Dongtou stations in Wenzhou and NCEP reanalysis data, the strong-wind weather off the coast of Wenzhou was analyzed. The study found that Wenzhou coastal winter wind is mainly caused by the cold air; early summer wind is mainly caused by the trough and low pressure; and summer wind is mainly caused by typhoon. The weather system causing more than 9 strength wind was analyzed. The existence of 850 hPa frontal zone, temperature gradient of 16˚C - 26˚C in 35˚N - 45˚N, and pressure gradient of 12 - 30 hPa in the ground 40˚N - 45˚N were found before the day that cold-air strong wind happened. The trough bottom of 850 hPa was in 20˚N - 25˚N, nearby 105˚E before the day that strong wind caused by low pressure and large gradient trough happened, and the jet stream was in front of trough.
参考文献
[1]
|
孙燕, 吴海英, 沈树勤, 等 (2007) 冬春季江苏沿海大风的特征. 南京气象学院学报, 5, 699-704.
|
[2]
|
董加斌, 胡波 (2007) 浙江沿海大风的天气气候概况. 台湾海峡, 4, 476-483.
|
[3]
|
卢美, 朱业 (2011) 浙江沿海大风的天气气候特征. 杭州师范大学学报(自然科学版), 10, 474-480.
|
[4]
|
张立祥, 陈力强, 等 (1998) 用T106L19产品制作春季西南大风预报. 气象, 7, 45-49.
|
[5]
|
杜京朝, 方乾, 等 (1998) 与T63数值预报产品相结合的江苏西南大风的预报方法. 气象科学, 3, 271-277.
|
[6]
|
王咏亮, 孟上, 等 (1999) 数值预报产品二次开发在近海大风预报上的一次试验. 海洋预报, 2, 69-73.
|
[7]
|
李敏, 王辉, 金啟华 (2009) 中国近海海面风场预报方法综述. 海洋预报, 3, 114-120.
|