Synoptic Climatology of Precipitation in Iran
Synoptic Climatology of Precipitation in Iran
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伊朗降水天气气候学
DOI：
10.1111/j.1467-8306.1985.tb00075.x
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
J. R. Harman
中科院分区：
文献类型：
--
作者：
B. Alijani;J. R. Harman
对伊朗24小时降水量大于等于0.1 mm的抬升机制进行了研究。根据对每日地面和500毫巴天气图的主观分析，我们系统地将1965-69年期间40个站的所有降水归因于对流层上部机制、地面扰动、海洋影响或主要由地面加热引起的不稳定。这些机制共同解释了84%的降水日数。仅高层扰动就能解释50%以上的降水;当与可识别的地面扰动相结合时，这种抬升机制总共占所有降水日数的70%以上。地面扰动在北部更为频繁，但在降水量较低的南部，仅高层扰动就具有更大的相对重要性。海洋的影响只在里海附近很重要，表面加热只在夏季是一个小的触发因素。
The uplift mechanisms associated with 24-hour precipitation receipts of 0.1 mm or greater in Iran were investigated. Based on a subjective analysis of daily surface and 500 mb weather charts, we systematically attributed all precipitation at 40 stations for the period 1965–69 to upper tropospheric mechanisms, surface disturbances, marine influence, or instability due primarily to surface heating. These mechanisms together explained 84 percent of all precipitation days. Upper-level disturbances alone explained over 50 percent; when combined with recognizable surface disturbances, this uplift mechanism collectively accounted for over 70 percent of all precipitation days. Surface disturbances were more frequent in the north, but upper-level disturbances alone attained greater relative importance in the south where precipitation was lower. Marine influence was important only near the Caspian Sea and surface heating was a minor trigger in summer only.