| 黄河上游玛曲地区近40a云量的变化特征 |
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| 引用本文： | 吉哲君,王丽娜,李国军,宁和平.黄河上游玛曲地区近40a云量的变化特征[J].新疆气象,2014,8(5):29-33. |
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| 作者姓名： | 吉哲君 王丽娜 李国军 宁和平 |
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| 作者单位： | 甘肃省甘南州气象局,甘肃省甘南州气象局,甘肃省甘南州气象局,甘肃省甘南州气象局 |
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| 基金项目： | 甘南藏族自治州气象局2014年科技创新驱动项目“甘南州温度精细化预报”资助 |
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| 摘 要： | 利用玛曲国家基本气象观测站1971—2010年的总云量、低云量等观测数据,用线性趋势分析、小波分析等方法对玛曲地区近40 a总云量、低云量的月、季、年际、年代际变化和周期性变化特征进行分析。研究表明,近40 a来,平均总云量距平在-0.1%～0.1%之间,保持了很好的稳定性,平均低云量以4.0%/10 a的速率递增;春、夏、秋季低云量呈现出不同程度的增多趋势,夏季增加趋势非常明显达7.3%/10 a。平均总云量周期变化不明显,平均低云量有明显的6～7 a的周期。玛曲地区在总云量保持稳定的情况下低云量不断增多,夏季低云量的增多趋势非常明显,且积雨云的增多是主要特征,是对玛曲草原气候变化的一种响应机制,反映出在气候变暖的大背景下,玛曲草原对流性天气活动频繁。
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| 关 键 词： | 玛曲地区 云量 变化趋势 气候变化 响应 |
| 收稿时间： | 2014/3/11 0:00:00 |
| 修稿时间： | 2014/4/17 0:00:00 |
Analysis on changes of cloud cover in Maqu areaof the Yellow Riverupper reaches in recent 40 years |
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| JI Zhe-jun,Wang-Li-n,Li Guo-jun and Ni He-ping.Analysis on changes of cloud cover in Maqu areaof the Yellow Riverupper reaches in recent 40 years[J].Bimonthly of Xinjiang Meteorology,2014,8(5):29-33. |
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| Authors: | JI Zhe-jun Wang-Li-n Li Guo-jun and Ni He-ping |
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| Institution: | Gannan Meteorological Bureau of Gansu Province,Hezuo,Gannan Meteorological Bureau of Gansu Province,Hezuo,Gannan Meteorological Bureau of Gansu Province,Hezuo,Gannan Meteorological Bureau of Gansu Province,Hezuo |
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| Abstract: | This use of maqu national basic meteorological stations total cloud cover, low cloud cover observation data for 1971-2010, with a linear trend analysis, wavelet analysis method of maqu region in recent 40 years total cloud cover, low cloud cover month, quarter, year and Interdecadal characteristics analysis of cyclical change. Studies have shown that over the past 40 years, average total cloud amount from the average between the -0.1%-0.1%, maintained a good stability, average low cloud cover in 4.0%/10a rate increases; low cloud cover in spring, summer and autumn show varying degrees of increase trend, increasing trend is obvious in the summer up to 7.3%/10. Mean total cloud cover over period changes do not obvious, average cycle of low cloud cover is a clear 6-7a. Maqu region in total cloud amount remains stable increasing low cloudiness and low cloud cover increased during the summer trend is quite clear that the increase is the main feature of the cumulonimbus cloud, is a response mechanism of maqu grassland climate change, reflected in the context of climate warming, maqu grassland of convective weather activity. |
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| Keywords: | Maqu arer of Gannan cloud cover trend climate change respond |
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