Observations of the planetary boundary layer over equatorial Indonesia with an L band clear‐air Doppler radar: Initial results
Observations of the planetary boundary layer over equatorial Indonesia with an L band clear‐air Doppler radar: Initial results
复制标题
用 L 波段晴空多普勒雷达观测印度尼西亚赤道上空的行星边界层：初步结果
DOI：
10.1029/95rs00653
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发表时间：
1995
期刊：
影响因子：
1.6
通讯作者：
H. Wiryosumarto
中科院分区：
文献类型：
--
作者：
H. Hashiguchi;S. Fukao;T. Tsuda;M. Yamanaka;Daniel L. Tobing;Tien Sribimawati;S. B. Harijono;H. Wiryosumarto
自1992年11月以来，一台L波段(1357.5 MHz)边界层雷达已在印度尼西亚Serpong(6.40°S，106.7°E)连续成功运行。在同步气象观测的基础上，研究了BLR在观测高度范围和测风可靠性方面的表现。我们发现，在晴天赤道行星边界层中有两种类型的强回波结构系统地出现，且具有日变化。第一类是从300m以下(上午)上升到3-5公里以上(下午)的强回波层的显著出现，这与混合行星边界层顶部的日变化有关。正如预期的那样，印尼赤道地区的气温高于中纬度地区。另一种是从夜间到早晨在2-3公里高度出现的层状回波，似乎与湿度差重合。
An L band (1357.5 MHz) boundary layer radar (BLR) has been in continuous successful operation in Serpong, Indonesia (6.4°S, 106.7°E), since November 1992. The performance of the BLR with respect to the observation height range and the wind measurement reliability has been examined on the basis of simultaneous meteorological observations. We have found that there are two types of strong echo structures appearing systematically in the equatorial planetary boundary layer with diurnal variations on clear days. The first type is the striking appearance of a strong echo layer ascending from below 300 m (in the morning) to above 3–5 km (in the afternoon), which is identified with a diurnal variation of the top of the mixing planetary boundary layer. As expected, it is higher in the Indonesian equatorial region than in midlatitudes. Another type is layered echoes appearing at 2–3 km heights from nighttime to morning, which seem to be coincident with humidity gaps.