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摘要：
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| 本文利用 DDAR Doppler声雷达的高精度激光雨量计所测的雨强资料,对雨强≥0.02mm/h的时段及其相邻的前后时段与降水时段相对应的回波强度参数及其演变进行了对比分析,得出与各降水时段对应的回波和降水前时段相比,有明显增强的趋势;而降水后相应时段的回波与降水时段相比,有较大幅度的减弱,其相对应的逆温强度γ(℃/mm)趋于减小。较强的降水时段和有效的连续降水将大幅度消弱回波强度,并使其较长时间地维持在低指数状态,其相应能见度也大为改善。 |
| In this paper, the echo reference of DDAR Doppler sonic radar high precision laser rain-fall recorder and its evolution corresponding to rainfall period when rain intensity is equal to and greater than 0.02mm/h and adjacent period are analyzed. The echo corresponding to each rainfall period obviously get more enhanced than that before rainfall; and it became relatively weak after rainfall, and the corresponding inversion intensity γ (℃/mm) tends to decrease. Relatively strong rainfall period and effectively continuous rainfall can make the echo intensity decrease greatly and remain the low index for a long time, and the visibility turns well. |
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