Diabatic Heating and Cooling Rates Derived from In Situ Microphysics Measurements: A Case Study of a Wintertime U.K. Cold Front
Diabatic Heating and Cooling Rates Derived from In Situ Microphysics Measurements: A Case Study of a Wintertime U.K. Cold Front
复制标题
DOI：
10.1175/mwr-d-14-00048.1
复制
发表时间：
2014-08
影响因子：
3.2
通讯作者：
C. Dearden;P. Connolly;G. Lloyd;J. Crosier;K. Bower;T. Choularton;G. Vaughan
中科院分区：
文献类型：
--
作者：
C. Dearden;P. Connolly;G. Lloyd;J. Crosier;K. Bower;T. Choularton;G. Vaughan
AbstractIn situ measurements associated with the passage of a kata cold front over the United Kingdom on 29 November 2011 was used to initialize a Lagrangian parcel model for calculating rates of diabatic heating and cooling associated with the phase changes of water within the cloud system.包裹模型计算进行了bin解析和批量处理的微物理过程。该案例研究的现场数据显示，水滴数浓度高达100 cm−3，在云顶检测到平面冰晶，以及在前额暖区由雾凇碎片喷射产生的柱状晶体。结果表明，锋面前缘对流上升气流中液态水的凝结增长是非绝热加热和冷却的最重要的动力来源。与冷凝相关联的峰值温度趋势通常被发现是至少一个数量级大于那些作为…
AbstractIn situ measurements associated with the passage of a kata cold front over the United Kingdom on 29 November 2011 are used to initialize a Lagrangian parcel model for the purpose of calculating rates of diabatic heating and cooling associated with the phase changes of water within the cloud system. The parcel model calculations are performed with both bin-resolved and bulk treatments of microphysical processes. The in situ data from this case study reveal droplet number concentrations up to 100 cm−3, with planar ice crystals detected at cloud top, as well as columnar crystals produced by rime splinter ejection within the prefrontal warm sector. The results show that in terms of magnitude, the most significant rates of diabatic heating and cooling are produced by condensation growth of liquid water within the convective updrafts at the leading edge of the front. The peak temperature tendencies associated with condensation are typically found to be at least an order of magnitude larger than those as...