globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6411769
论文题名:
河西走廊东部雪日时空演变特征
其他题名: Characteristics of snowy days in east Hexi Corridor: temporal and spatial variations
作者: 杨晓玲1; 郭丽梅2; 张春燕2; 王鹤龄3
刊名: 冰川冻土
ISSN: 1000-0240
出版年: 2018
卷: 40, 期:6, 页码:504-514
语种: 中文
中文关键词: 雪日 ; 演变特征 ; 气候倾向率 ; 趋势系数 ; 河西走廊东部
英文关键词: snowy days ; evolution characteristics ; climate tendency rates ; trend coefficient ; east Hexi Corridor
WOS学科分类: METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向: Meteorology & Atmospheric Sciences
中文摘要: 为提高降雪的预报预测水平、研究区域气候变化、科学利用水资源和保护生态环境。利用1960-2016年河西走廊东部5个观测站逐日降雪资料,运用气候统计学方法分析了该区域雪日的时空变化及异常性等特征。结果表明:河西走廊东部年雪日及各量级雪日从西南向东北呈减少趋势,雪日天祝最多,民勤最少。除凉州外,河西走廊东部年及年代雪日呈减少趋势,天祝雪日减少尤为显著,年雪日时间序列的准周期变化为6 ~ 8 a。各地月雪日的变化比较一致,雪日主要出现在1-4月和10-12月,高峰值在3月,冬季是主要的降雪季节。各地年雪日的异常性比较一致,正常年份发生概率在68. 4% ~ 73. 7%,依次向两端迅速递减。小雪是河西走廊东部降雪的主体,小雪日所占比率在78. 6% ~ 93. 5%,随着降雪量级的增大,雪日迅速减少。0. 0 mm小雪日各地均呈显著减少趋势,对总雪日的负贡献最大; ≥0. 1 mm小雪日和中雪日大多呈增多趋势,对总雪日呈正贡献;大雪及以上日大多呈弱减少趋势,对总雪日呈弱负贡献。
英文摘要: Nowadays,it is urgent to improve forecast level of snowfall,to study regional climate change,to utilize scientifically water resources and to protect ecological environment in east Hexi Corridor. Using daily snow data from five meteorological stations in east Hexi Corridor during 1960-2016,temporal and spatial variations of snowy days in this region were analyzed with climatic statistics method. The results showed that temporal and spatial variations of snowy days had been decreased from southwest to northeast because of the effect of altitude, topography and weather system. Except for Liangzhou,annual and decadal snowy days had decreased,expecially in Tianzhu. Time series of annual snowy days had a six to eight years quasi-periodic variation. Temporally, monthly variation of snowy days had been rather consistent; snowy days mainly appeared from January to April and from October to December,with a peak in March,and winter was the primary snow season. Annual anomalism of snowy days was consistent every where,with an occurrence probability of 68. 4% ~ 73. 7% normally, and declining to both ends in turn. Less snowy days had a high percentage of snowy days in east Hexi Corridor, with a occurrence probability of 78. 6% ~ 93. 5% and decreasing rapidly with magnitude. Less snowy days of 0. 0 mm had decreased significantly and had negatively contributed to total snowy days; less snowy days of ≥0. 1 mm and middle snowy days had increased mostly and positively contributed to total snowy days; heavy snow days had weakly decreased mostly and had negatively contributed to total snowy days.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/153745
Appears in Collections:气候变化事实与影响

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作者单位: 1.甘肃省武威市气象局
2.中国气象局兰州干旱气象研究所,
3., 武威
4.兰州, 甘肃
5.甘肃 733099
6.730020, 中国
7.甘肃省武威市气象局, 武威, 甘肃 733099, 中国
8.中国气象局兰州干旱气象研究所, 兰州, 甘肃 730020, 中国

Recommended Citation:
杨晓玲,郭丽梅,张春燕,等. 河西走廊东部雪日时空演变特征[J]. 冰川冻土,2018-01-01,40(6):504-514
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