Dropsonde Observations in Low-Level Jets over the Northeastern Pacific Ocean from CALJET-1998 and PACJET-2001: Mean Vertical-Profile and Atmospheric-River Characteristics
Dropsonde Observations in Low-Level Jets over the Northeastern Pacific Ocean from CALJET-1998 and PACJET-2001: Mean Vertical-Profile and Atmospheric-River Characteristics
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DOI：
10.1175/mwr2896.1
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发表时间：
2005-04
影响因子：
3.2
通讯作者：
F. Ralph;P. Neiman;R. Rotunno
中科院分区：
文献类型：
--
作者：
F. Ralph;P. Neiman;R. Rotunno
摘要利用投下式探空仪观测资料，研究了东太平洋热带气旋冷锋前低空急流（LLJ）区的运动学和热力学条件的平均垂直廓线。这是风暴内的区域，不仅是负责大部分的暴雨所引起的地形，当这样的风暴袭击海岸，但也几乎所有的纬向水汽输送在中纬度地区。这些数据是从1998年加州降落射流实验（CALJET）期间的10场风暴和2001年太平洋降落射流实验（PACJET）期间的7场风暴中NOAA的P-3飞机收集的。投下式探空仪的平均位置在离岸500公里处，远离地形影响的上游。从两个冬季，其特点是非常不同的天气制度和ENSO的不同阶段，即厄尔尼诺在1998年和拉尼娜在2001年的数据的可用性允许检查年际变化。复合预冷膜
Abstract Dropsonde observations are used to document the mean vertical profiles of kinematic and thermodynamic conditions in the pre-cold-frontal low-level-jet (LLJ) region of extratropical cyclones over the eastern Pacific Ocean. This is the region within storms that is responsible not only for the majority of heavy rainfall induced by orography when such storms strike the coast, but also for almost all meridional water vapor transport at midlatitudes. The data were collected from NOAA’s P-3 aircraft in 10 storms during the California Land-falling Jets Experiment (CALJET) of 1998 and in 7 storms during the Pacific Land-falling Jets Experiment (PACJET) of 2001. The mean position of the dropsondes was 500 km offshore, well upstream of orographic influences. The availability of data from two winters that were characterized by very different synoptic regimes and by differing phases of ENSO—that is, El Nino in 1998 and La Nina in 2001—allowed examination of interannual variability. The composite pre-cold-fron...