贵阳机场一次云贵静止锋雾的诊断分析
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摘要
利用常规气象资料、贵阳机场例行天气报告、特殊天气报告和自动观测系统等资料,对贵阳机场2016年11月17日的一次云贵静止锋雾进行诊断分析.结果表明:低层切变线、云贵静止锋是造成此次锋面雾生成的主要系统;锋面雾发生时,地面及锋区附近风速较小,逆温层接地,近地面和低层水汽条件较好,垂直湿层较厚,大气处于饱和状态;近地面湿度降低,地面及锋区附近风速加大,以及逆温层抬升可预报锋面雾的消散;此次锋面雾发生在云贵静止锋减弱阶段,且出现在锋面暖区一侧,雾发生时锋区斜压性增强,雾发生后锋区斜压性减弱.
Using the general meteorological datas routine weather reports,special weather reports and automatic observation system datas of Guiyang Airport,etc,to diagnostic analysis a Yunnan-Guizhou stationary front fog of Guiyang Airport on November 17,2016.The result shows that the low shear line and the Yun-gui stationary front are the main systems of causeing this frontal fog.When the frontal fog happens,the surface and front area′s wind speed are very small,the temperature inversion layer is very high,and its bottom is grounded,the vapor conditions of the ground and low layer are good,the vertical wet layer is very thick and atmosphere is saturated.The frontal fog can be predicted disappear by the ground humidity decreaseing,the surface and frontal zone′s wind speeds increaseing,and the the temperature inversion layer lifting.This frontal fog occurred in the phase of Yunnan-Guizhou stationary front weakening,and appeared on the side of the warm zone of the front.When the frontal fog occurred,the baroclinicity of frontal zone increased.After the frontal fog occurred,the baroclinicity of frontal zone decreased.
Using the general meteorological datas routine weather reports,special weather reports and automatic observation system datas of Guiyang Airport,etc,to diagnostic analysis a Yunnan-Guizhou stationary front fog of Guiyang Airport on November 17,2016.The result shows that the low shear line and the Yun-gui stationary front are the main systems of causeing this frontal fog.When the frontal fog happens,the surface and front area′s wind speed are very small,the temperature inversion layer is very high,and its bottom is grounded,the vapor conditions of the ground and low layer are good,the vertical wet layer is very thick and atmosphere is saturated.The frontal fog can be predicted disappear by the ground humidity decreaseing,the surface and frontal zone′s wind speeds increaseing,and the the temperature inversion layer lifting.This frontal fog occurred in the phase of Yunnan-Guizhou stationary front weakening,and appeared on the side of the warm zone of the front.When the frontal fog occurred,the baroclinicity of frontal zone increased.After the frontal fog occurred,the baroclinicity of frontal zone decreased.
引文
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[2] 陶云,段旭,段长春,等.云南近50 a雾的变化特征[J].云南大学学报:自然科学版,2011,33(3):308-316 .
[3] 杨静,汪超,彭芳,等.低纬山区一次持续锋面雾特征探讨[J].气象科技,2011,39(4):445-452.
[4] 杨浩,刘峰,曹正,等.一次华南静止锋影响下的中南地区大雾特征分析[J].气象研究与应用,2013,34(S1):96-97.
[5] 刘开宇.贵阳机场辐射雾MOS预报系统的设计与实现[J].云南大学学报:自然科学版,2014,36(S1):112-116.
[6] 刘小宁,张洪政,李庆祥,等.我国大雾的气候特征及变化初步解释[J].应用气象学报,2005,16(2):220-230.
[7] 高红燕,贺音,王丹,等.近50年西安市雾日数的变化趋势及可能原因[J].高原气象,2013,32(6):1 739-1 746.
[8] 王彦磊,曹炳伟,黄兵,等.基于神经网络的单站雾预报试验[J].应用气象学报,2010,21(1):110-113.
[9] 陆春松,牛生杰,杨军,等.南京冬季一次雾过程宏微观结构的突变特征及成因分析[J].大气科学,2010,34(4):681-690.