地理学报 ›› 1981, Vol. 36 ›› Issue (4): 392-403.doi: 10.11821/xb198104005

• 论文 • 上一篇    下一篇

地形对温、压、湿、风、降水和日照时数日变化影响的研究

林之光   

  1. 中央气象局气象科学研究院
  • 出版日期:1981-10-15 发布日期:1981-10-15

A STUDY OP THE INFLUENCE OF OROGRAPHY ON DIURNALCHANGES OF TEMPERATURE, PRESSURE, WIND VELO-CITY, PRECIPITATION, RELATIVE HIMIDITY ANDDURATION OF SUNSHINE

Lin Zhiguang   

  1. Aeademy of meteorological Science, Central Meteorological Bureau
  • Online:1981-10-15 Published:1981-10-15

摘要: 本文研究我国山顶(山脊)—河谷(盆地)地形台站的气温、降水、气压、相对湿度、风速、和日照时数等日变化的差异。 在研究中,对压、温、湿、日照各要素使用1955—1959年共五年的资料,降水稍长,风速则统一使用1973—1977年共五年电接自记的资料。在研究过程中发现,除了东部地区的降水日变化外,其它要素即使五年平均所得结果亦比较稳定,能较好反映地形对气象要素的影响规律。

关键词: 日振幅, 气温日变化, 日照时数, 拔海, 夜雨, 山谷站, 台站, 降水, 云量, 风速日变化

Abstract: In this paper, the following results are obtained:1. The diurnal temperature range is small on the summit of high mountains ’iutit is large in the valleys. Maximum temperature comes earlier on the summits than inthe valleys. i,e. about 13h on the summits and 14-15h in the valleys.2. The diurnal variation of precipitation on high mountain is just the contrary withthat of some large valleys: precipitation in daytime is l;:rger than that at night on thesummits, and precipitation in daytime is smaller than that at night Ln the hiurh valleys.And in large valleys of Xizhang and Yunnan, night rain follows the fine day. but inSichuan Basin, night rain follows the overcast day.3. The diurnal change of relative tumidity is very small on the summit, but is verylarge in the valley. Its maximum comes in the early morning and minimum appearsin the afternoon.4. On the top of a great mountain and in. large valley, the diurnal change of windvelocity are reverse too. In general, the maximum appears at night and the minimum inthe daytime on high mountain, while in the low valley, daytime maximum and niorhtminimum is observed. On Qing Zliang Plateau in winter and spring, the diurnal r. ngeui wind velocity is about 7? m/’sec which is the largest in our country.5. On mountain summit, two maxima and one minimum are observed on the diu-rnal curve of sunshine.- the maxima appear at U-10h, and 15-16h; minimum at about12-13h. In the valley, diurnal curve has one maximum only, it appears at about 9-10h in the dry season and about 12h in rainy season.6. On high mountains the diurnal curve of pressure have two abnormal waveswhich are different from that in the low land. In some high mountains, it has a singlewave only. We found that the diurnal range of pressure is proportional to the diurnalrange of temperature.