| 甘肃省1967-2008年气温和降水时空变化 |
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| 引用本文： | 王红桃,包光.甘肃省1967-2008年气温和降水时空变化[J].新疆气象,2017,11(2):34-42. |
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| 作者姓名： | 王红桃 包光 |
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| 作者单位： | 宝鸡文理学院,陕西省灾害监测与机理模拟重点实验室;陕西省灾害监测与机理模拟重点实验室 |
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| 基金项目： | 陕西省青年科技新星计划项目(2016KJXX-41)；陕西省自然科学基础研究计划项目(2014JQ5192)；国家自然科学(41301101)；黄土与第四纪地质国家重点实验室开放(SKLLQG1505,SKLLQG1302) |
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| 摘 要： | 利用甘肃省27个气象站1967-2008年的气温和降水资料，采用趋势系数法、反距离权重插值法和小波分析法分析了甘肃省近42年的气温和降水时空变化，并将甘肃省以季风区非季风区划分为西北部和东南部两个研究区。研究结果表明：1967-2008年甘肃省气温呈增加趋势，降水呈减少趋势。甘肃省西北部气温较东南部增加显著，尤其是河西走廊中部增温速率最快，并且甘肃省、西北部和东南部气温序列都存在12-15a、6a左右的周期，气温的变化与厄尔尼诺和拉尼娜事件密切相关。甘肃省降水量西北部有略微的增加趋势，东南部减少显著，不同的海拔高度降水量差异较大，甘肃省和东南部在时间尺度上都存在14a、7-8a和4a左右的周期。西北部存在12a、7a和4a的周期。甘肃省西北部气候略变暖湿，东南部气候暖干化趋势显著。
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| 关 键 词： | 气温 降水 亚洲季风区 西风带气候区 甘肃省 |
| 收稿时间： | 2016/7/17 0:00:00 |
| 修稿时间： | 2016/9/2 0:00:00 |
Spatiotemporal Variability of Temperature and Precipitation during the Period 1967-2008 in Gansu Province |
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| WANG Hong-tao and Bao Guang.Spatiotemporal Variability of Temperature and Precipitation during the Period 1967-2008 in Gansu Province[J].Bimonthly of Xinjiang Meteorology,2017,11(2):34-42. |
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| Authors: | WANG Hong-tao and Bao Guang |
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| Institution: | Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,School of Geography and Environment,Baoji University of Arts and Sciences;Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,School of Geography and Environment,Baoji University of Arts and Sciences,Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,School of Geography and Environment,Baoji University of Arts and Sciences;Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,School of Geography and Environment,Baoji University of Arts and Sciences |
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| Abstract: | Based on the data of temperature and precipitation from 27 meteorological stations in Gansu Province, spatiotemporal features of regional climate change during the period 1967-2008 were analyzed by the methods of trend coefficient, inverse distance weighted interpolation and wavelet analysis. Study results indicated that temperature exhibited a rising trend and precipitation exhibited an opposite trend over the whole Gansu province during the past 42 years. Temperature in northwestern Gansu increased faster than that in southeastern region. Particularly, high linear slopes of rising trend in temperature appeared in the central part of Hexi Corridor. The primary oscillation periods of approximately 12-15 years and 6 years occurred in the temperature series of the whole Gansu province as well as in northwestern and southeastern regions. The temperature variations over this region displayed closely connections with the events of ENSO and La Nina. Precipitation in northwestern Gansu increased slightly, on the contrary, precipitation in southeastern region decreased obviously. The wavelet analyses exhibited primary oscillation periods of 14 years, 7-8 years and 4 years contained in the precipitation series of the whole Gansu province and southeastern region. Approximately 12 years, 7 years and 4 years periods were found in northwestern precipitation sequence. In general, warm and wet climate conditions appeared in northwestern Gansu and opposite variation trends (warm and dry) appeared in southeastern Gansu during the several decades. |
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| Keywords: | temperature precipitation Asian summer monsoon westerlies Gansu Province |
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