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首页> 外文期刊>Journal of hydrometeorology >The Chilean Coastal Orographic Precipitation Experiment: Observing the Influence of Microphysical Rain Regimes on Coastal Orographic Precipitation
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The Chilean Coastal Orographic Precipitation Experiment: Observing the Influence of Microphysical Rain Regimes on Coastal Orographic Precipitation

机译：智利沿海地形降水实验：观察微微雨层对沿海地形降水的影响

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摘要

The Chilean Coastal Orographic Precipitation Experiment (CCOPE) was conducted during the austral winter of 2015 (May-August) in the Nahuelbuta Mountains (peak elevation 1.3 km MSL) of southern Chile (388S). CCOPE used soundings, two profiling Micro Rain Radars, a Parsivel disdrometer, and a rain gauge network to characterize warm and ice-initiated rain regimes and explore their consequences for orographic precipitation. Thirty-three percent of foothill rainfall fell during warm rain periods, while 50% of rainfall fell during ice-initiated periods. Warmrain drop size distributions were characterized by many more and relatively smaller drops than ice-initiated drop size distributions. Both the portion and properties of warm and iceinitiated rainfall compare favorably with observations of coastal mountain rainfall at a similar latitude in California. Orographic enhancement is consistently strong for rain of both types, suggesting that seeding from ice aloft is not a requisite for large orographic enhancement. While the data suggest that orographic enhancement may be greater during warm rain regimes, the difference in orographic enhancement between regimes is not significant. Sounding launches indicate that differences in orographic enhancement are not easily explainable by differences in low-level moisture flux or nondimensional mountain height between the regimes.
机译：智利沿海地理降水实验（CCOPE）于2015年南部（八月）在智利南部（388年代）的Nahuelbuta山脉（8月8日）（388岁）中进行。 Ccope使用的探测，两个分析微雨雷达，Parasivel Discrometer和雨量仪网络，以表征温暖和冰发起的雨水制度，并探讨它们对地形降水的后果。在温暖的雨季期间，33％的山麓降雨量下降，而冰的时期则降雨量的50％。 Plibrain Drop尺寸分布的特征在于比冰发起的液滴尺寸分布相对较小的液滴。温暖和冰的降雨的部分和性质在加利福尼亚州的类似纬度地区的沿海山地降雨的观察结果相比比较。地形增强始终强大的两种类型的雨，这表明来自冰凉鞋的播种不是大的地形增强的必要条件。虽然数据表明在温雨制度期间的地形增强可能更大，但制度之间的地形增强的差异并不重要。探测发射表明，在制度之间的低水平水分助流量或不跨度山高度的差异，不容易解释了地形增强的差异。

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