气候变化研究快报  >> Vol. 3 No. 1 (January 2014)

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

DOI: 10.12677/CCRL.2014.31006, PDF, HTML, 下载: 2,064  浏览: 6,604 

作者: 李传祥, 夏华弟:瑞安市气象局,瑞安;郑 峰:温州市气象局,温州

关键词: 沿海大风天气特征预报指标Coastal Wind; Weather Characteristics; 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˚N105˚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.

文章引用: 李传祥, 郑峰, 夏华弟. 温州沿海大风天气特征分析及预报指标探讨[J]. 气候变化研究快报, 2014, 3(1): 31-37. http://dx.doi.org/10.12677/CCRL.2014.31006

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