The Contribution of Subtropical Moisture Within an Atmospheric River on Moisture Flux, Cloud Structure, and Precipitation Over the Salmon River Mountains of Idaho Using Moisture Tracers
The Contribution of Subtropical Moisture Within an Atmospheric River on Moisture Flux, Cloud Structure, and Precipitation Over the Salmon River Mountains of Idaho Using Moisture Tracers
复制标题
使用水分示踪剂研究大气河中亚热带水分对爱达荷州萨蒙河山脉水分通量、云结构和降水的贡献
DOI：
10.1029/2022jd037727
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Zaremba, Troy J.
中科院分区：
文献类型：
--
作者：
Rea, Divya;Rauber, Robert M.;Hu, Huancui;Tessendorf, Sarah A.;Nesbitt, Steve W.;Jewett, Brian F.;Zaremba, Troy J.
大气河流（AR）对亚热带水汽穿过爱达荷州的鲑鱼河山脉和山脉降水通量的影响使用天气，研究和预测模式与水汽示踪剂（WRF‐WVT）进行评估。AR于2017年1月17日至19日在播种和自然地形冬季云：爱达荷州实验（SNOWIE）活动期间影响了爱达荷州。WRF-WVT被配置为隔离亚热带水分对AR、水分通量和降水的贡献。通过AR平流进入爱达荷州的亚热带水蒸气在整个运行过程中在三维空间中被标记和跟踪。这使得副热带水汽对水汽垂直分布和降水的贡献可以直接计算出来。将模拟的云结构与两个SNOWIE密集运行期间收集的机载雷达数据进行比较。这项研究发现，超过70%的水分通量和超过80%的降水量在爱达荷州山脉在雪IOP 4可以归因于亚热带水分在AR。几乎所有的上层云水汽通量和50%的下层云水汽通量都来自副热带水汽。在AR内的亚热带水分对降水的贡献范围从北方爱达荷州的35%到爱达荷州南部的90%以上。在整个AR的影响期间，爱达荷州超过60%的降水是由于AR内的亚热带水分，这一比例在整个州向南增加。
The impact of an atmospheric river (AR) on the flux of subtropical moisture across Idaho's Salmon River Mountains and precipitation over the mountains is evaluated using the Weather, Research, and Forecasting model with water vapor tracers (WRF‐WVT). The AR impacted Idaho between 17 and 19 January 2017 during the Seeded and Natural Orographic Wintertime Clouds: The Idaho Experiment (SNOWIE) campaign. WRF‐WVT is configured to isolate the subtropical moisture contribution to the AR, the moisture flux, and precipitation. Subtropical water vapor advected by the AR into Idaho is tagged and tracked in three‐dimensional space throughout the run. This allows the contribution of the subtropical moisture to the vertical distribution of water vapor and the precipitation to be directly calculated. The simulated cloud structure is compared with airborne radar data collected during two SNOWIE intensive operation periods. This study found that more than 70% of the moisture flux and more than 80% of the precipitation across the Idaho Mountains during SNOWIE IOP 4 could be attributed to subtropical moisture within the AR. Nearly all of the moisture flux in the upper cloud and 50% of the moisture in the lower cloud was attributable to the subtropical moisture. The subtropical moisture contribution within the AR to precipitation ranged from 35% in northern Idaho to more than 90% in southern Idaho. Across the entire period of impact of the AR, more than 60% of precipitation in Idaho was attributable to the subtropical moisture within the AR, with this percentage increasing toward the south across the state.
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影响因子：
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作者：
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DOI：
10.1029/2020jd032513
发表时间：
2020-09
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
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影响因子：
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作者：
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通讯作者：
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