Microphysics Regime Impacts on the Relationship between Orographic Rain and Orographic Forcing in the Coastal Mountains of Northern California
Microphysics Regime Impacts on the Relationship between Orographic Rain and Orographic Forcing in the Coastal Mountains of Northern California
复制标题
微物理机制对北加州沿海山区地形雨与地形强迫关系的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. White
中科院分区：
文献类型：
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作者：
D. Kingsmill;P. Neiman;A. White
本文利用收集了10个凉季的多普勒雷达、雨量计和GPS接收器的4000小时资料，研究了微物理系统对加利福尼亚北部沿海山区地形强迫和地形降水之间关系的影响。地形强迫是通过在博德加湾(BBY；15米MSL)沿岸观测到的每小时向上流动、积分水汽(IWV)和IWV通量来记录的。在Cazadero(cZc；478m MSL)沿海山区推断了微物理状态，在那里指定了每小时的亮带(BB)和非亮带(NBB)降雨周期。BB雨与以播种-补给过程为主的微物理系统有关，而NBB雨与以暖雨过程为主的微物理系统有关。与BB雨相比，NBB雨的平均BBY上坡流量、IWV和IWV通量分别大~16%、~5%和~19%，而BB雨的平均cZc雨率比NBB雨大~33%。地形增强..。
AbstractThis study examines the impact of microphysics regime on the relationship between orographic forcing and orographic rain in the coastal mountains of Northern California using >4000 h of data from profiling Doppler radars, rain gauges, and a GPS receiver collected over 10 cool seasons. Orographic forcing is documented by hourly upslope flow, integrated water vapor (IWV), and IWV flux observed along the coast at Bodega Bay (BBY; 15 m MSL). Microphysics regime is inferred in the coastal mountains at Cazadero (CZC; 478 m MSL), where hourly periods of brightband (BB) and nonbrightband (NBB) rain are designated. BB rain is associated with a microphysics regime dominated by the seeder–feeder process while NBB rain is associated with a microphysics regime dominated by the warm-rain process. Mean BBY upslope flow, IWV, and IWV flux are ~16%, ~5%, and ~19% larger, respectively, for NBB rain compared to BB rain, while mean CZC rain rate is ~33% larger for BB rain compared to NBB rain. The orographic enhancem...