Variations of Winter Snow Concentration Degree and Snow Concentration Period in Northeast China
Received date: 2009-12-08
Revised date: 2010-07-03
Online published: 2010-09-20
Supported by
Foundation: Climate Change Special Fund of CMA, No.CCSF-09-01; New Technology Popularizing Project of CMA, No.CMATG2008M19; Study on Time-spatial Variation and Forecasting Methods of High-impact Climate Events over Beijing and Its Surrounding, No.Z07050600680701
Based on 1961-2005 observed winter precipitation data in Northeast China, the temporal and spatial variations of precipitation concentration degree (PCD) and precipitation concentration period (PCP) are computed and analyzed, together with the circulation characteristics when there is a higher PCD. Results show that the PCD in Northeast China presents a yearly rising tendency and the PCP decreases obviously. In terms of decadal variation, there is a 12-year periodic variation in PCP, and since the mid-1970s there has been an 8-year short periodic variation. As to spatial variation, the PCD in winter of Northeast China has increased gradually from the eastern to western part, and the minimum value of PCD occurs in the east of Jilin Province, while the high value center is observed in the central part of the province. For the whole Northeast China, the variation tendencies are consistent in the eastern and central parts. The PCD presents a rising tendency and the PCP shows a decreasing tendency. The PCD in the southwestern and northern parts has a slight rising tendency, with the PCD in the southwestern part having the slightest increasing tendency, and the PCP in the northern part showing the slightest decreasing tendency. When a high PCD value is observed, the areas are controlled by the East Asian deep trough at 500 hPa, and the trough becomes deeper in the western part, while a high pressure, which is easily formed and intensified in the eastern part, makes the East Asia deep trough move eastward slowly. Upper-level jet stream and low-level jet stream co-exist, and the former is stronger and takes more of a southwestward position than the latter. Over the Pacific the high value extent of water vapor transport is intensified obviously, and the extent also increases. Northeast China is influenced by the water vapor transported to the northwest along the north of the high value center.
WANG Ji, ZHAO Chunyu, LOU Dejun . Variations of Winter Snow Concentration Degree and Snow Concentration Period in Northeast China[J]. Acta Geographica Sinica, 2010 , 65(9) : 1069 -1078 . DOI: 10.11821/xb201009004
[1] Yang Lianmei, Yang Tao, Jia Lihong et al. Analyses of the climate characteristics and water vapor of heavy snow in Xinjiang region. Journal of Glaciology and Geocryology, 2005, 27(3): 390-396.
[杨莲梅, 杨涛, 贾丽红等. 新疆大—暴 雪气候特征及其水汽分析. 冰川冻土, 2005, 27(3): 390-396.]
[2] Gong Deji, Li Zhangjun. The climatic features of heavy snow, snowstorm and snow disaster in Inner Mongolia. Meteorological Monthly, 2000, 26(12): 25-28.
[宫德吉, 李彰俊. 内蒙古大(暴) 雪与白灾的气候学特征. 气象, 2000, 26 (12): 25-28.]
[3] Dong Anxiang, Ju Zhang, Yin Xianzhi et al. The singular spectrum analysis of snow damage in eastern Qinghai-Xizang Plateau. Plateau Meteorology, 2001, 20(2): 214-219.
[董安祥, 瞿章, 尹宪志等. 青藏高原东部雪灾的奇异谱分析. 高原 气象, 2001, 20(2): 214-219.]
[4] Ma Lin, Li Xifu, Zhang Qingmei et al. The forming and forecasting of winter snow-disaster weather in eastern pastoral-area of Qinghai-Xizang Plateau. Plateau Meteorology, 2001, 20(3): 326-331.
[马林, 李锡褔, 张青梅等. 青藏高 原东部牧区冬季雪灾天气的形成及其预报. 高原气象, 2001, 20(3): 326-331.]
[5] Dong Wenjie, Wei Zhigang, Fan Lijun. Climatic character analyses of snow disasters in east Qinghai-Xizang Plateau livestock farm. Plateau Meteorology, 2001, 20(4): 402-406.
[董文杰, 韦志刚, 范丽军. 青藏高原东部牧区冬季雪灾的气 候特征分析. 高原气象, 2001, 20(4): 402-406.]
[6] Zhou Lusheng, Li Haihong, Wang Qingchun. The basic characteristics of heavy snowstorm process and snow disaster distribution in eastern pastoral areas of Qinghai-Xizang Plateau. Plateau Meteorology, 2000, 19(4): 450-458.
[周陆生, 李 海红, 汪青春. 青藏高原东部牧区大—暴雪过程及雪灾分布的基本特征. 高原气象, 2000, 19(4): 450-458.]
[7] Yi Qingju, Liu Yanying, Xu Chenhai. Synoptical and climatological analysis of snow fall from 1980 to 1994 in Beijing area. Quarterly Journal of Applied Meteorology, 1999, 10(2): 250-254.
[仪清菊, 刘延英, 许晨海. 北京1980-1994 年降 雪的天气气候分析. 应用气象学报, 1999, 10(2): 250-254.]
[8] Zhang Lujun, Qian Yongfu. Annual distribution features of the yearly precipitation in China and their interannual variations. Acta Meteorologica Sinica, 2003, 17(2): 146-163.
[9] Yang Yuandong. The method of calculating distribution of river runoff in the year. Acta Geographica Sinica, 1984, 39 (2): 218-227.
[杨远东. 河川径流年内分配的计算方法. 地理学报, 1984, 39(2): 218-227.]
[10] Charles G M. Seasonality of precipitation in the United States. Annals of the Association of American Geographers, 1970, 6(3): 593-597.
[11] Zhang Lujun, Qian Yongfu. A study on the feature of precipitation concentration and its relation to flood-producing in the Yangtze River Valley of China. Chinese Journal of Geophysics, 2003, 47(4): 622-630.
[张录军, 钱永甫. 长江流域 汛期降水集中程度和洪涝关系研究. 地球物理学报, 2003, 47(4): 622-630.]
[12] Jiang Aijun, Du Yin, Xie Zhiqing et al. Climatic trends of heavy precipitation spatial and temporal concentration in China. Acta Geographica Sinica, 2005, 60(6): 1007-1014.
[姜爱军, 杜银, 谢志清等. 中国强降水过程时空集中度气 候趋势. 地理学报, 2005, 60(6): 1007-1014.]
[13] Ding Yuguo, Zhang Yaocun, Liu Jifeng. A new cluster method for climatic classification and compartment using the conjunction between CAST and REOF. Chinese Journal of Atmospheric Sciences, 2006, 31(1): 129-136.
[丁裕国, 张耀 存, 刘吉峰. 一种新的气候分型区划方法. 大气科学, 2006, 31(1): 129-136.]
[14] Hu Zhongming, Zhou Weican. Case study on the genesis of a snowstorm over the Northeast Region in China. Journal of Nanjing Institute of Meteorology, 2005, 28(5): 679-684.
[胡中明, 周伟灿. 我国东北地区暴雪形成机理的个例研 究. 南京气象学院学报, 2005, 28(5): 679-684.]
/
| 〈 |
|
〉 |