According to the monthly precipitation data during 1959-2001, we find the drought trend was obvious from the 1960s to the 1980s, and more precipitation was observed in the 1990s than in the 1980s. Power spectrum analysis shows that there exist three obviously simultaneous periods between precipitation in Ningxia and ENSO: 14 years, 3.75 years, approximately 2 years and 1.5 years. Precipitation in Ningxia responds quicker to La Nina than to El Nino, the lag time of the former is 1-2 months while the latter is 2-4 months. The impact that ENSO imposes on the seasonal precipitation varies tremendously. Four months later after the El Nino event, the precipitation decreases in spring, summer and autumn except a winter's increase. One month later after the La Nina event, the precipitation experienced a large increase in summer, autumn and winter except a spring's decrease. During the period of El Nino event the precipitation in Ningxia shows a 28mm decrement, whose proportion to the perennial year is 10?. However, during the period of El Nino event the precipitation in Ningxia has a 24-mm increment, which accounts for 9%.
XIN Zhong-Bao, XIE Zhi-Ren, WANG Wen
. Character of Precipitation in Ningxia and Its Response to ENSO[J]. SCIENTIA GEOGRAPHICA SINICA, 2005
, 25(1)
: 49
-55
.
DOI: 10.13249/j.cnki.sgs.2005.01.49
[1] 林年丰,汤 洁.中国干旱半干旱区的环境演变与荒漠化的成因[J].地理科学,2001,21(1): 24~29.
[2] 龚道溢,王绍武.北半球冬季纬向平均环流的结构及对我国气候的影响[J].地理科学,2001,21(2): 108~112.
[3] 王亚军,陈发虎, 勾晓华.利用树木年轮资料重建祁连山中段春季降水的变化[J].地理科学,2001,21(4): 373~377.
[4] 吴 凯,黄荣金.黄淮海平原水土资源利用的可持续性评价、开发潜力及对策[J].地理科学,2001,21(5):390~395.
[5] 邓慧平,李秀彬 张 明,等.气候与地表覆被变化对梭磨河流域水文影响的分析[J].地理科学,2001,21(6):493~497.
[6] 王 建,黄巧华,柏春广,等.2.5Ma以来柴达木盆地的气候干湿变化特征及其原因[J].地理科学,2002,22(1): 34~38.
[7] 孙 力,安 刚,丁 立.中国东北地区夏季旱涝的分析研究[J].地理科学,2002,22(3): 311~316.
[8] 刘晓东,安芷生,方建刚,等.全球气候变暖条件下黄河流域降水的可能变化[J].地理科学,2002,22(5): 513~519.
[9] 王张华,陈中原 寇 莹,等.太湖流域960年以来的气候干湿变化研究[J].地理科学,2002,22(5): 546~551.
[10] 吴正方,靳英华,刘吉平,等.东北地区植被分布全球气候变化区域响应[J].地理科学,2003,23(5): 564~570.
[11] 阎 顺,孔昭宸,杨振京,等.东天山北麓2 000多年以来的森林线与环境变化[J].地理科学,2003,23(6): 699~704.
[12] 孙 力,安 刚,高枞亭,等.中国东北地区地表水资源与气候变化关系的研究[J].地理科学,2004,24(1): 42~49.
[13] 李香云,王立新,章予舒,等.西北干旱区土地荒漠化中人类活动作用及其指标选择[J].地理科学,2004,24(1): 68~75.
[14] 朱晓华,蔡运龙.中国自然灾害灾情统计与自组织临界性特征[J].地理科学,2004,24(1): 264~269.
[15] 路云阁,李双成,蔡运龙.近40年气候变化及其空间分异的多尺度研究——以内蒙古自治区为例[J].地理科学,2004,24(4): 432~438.
[16] 陈烈庭.东太平洋赤道地区海水温度异常对热带大气环流及我国汛期降水的影响[J].大气科学,1977,1(1):1~12.
[17] 钱步东.我国汛期降水与ENSO不同位相的联系[J].地理科学,1996,16(1):3~9.
[18] 陈菊英,Wasyl Drosdowsky Neville Nicholls.中国汛期区域旱涝与ENSO事件的遥相关研究[J].中央民族大学学报(自然科学版),1995,4(1):41~50.
[19] 陈菊英,王玉红,王 文.近50年来ENSO的冷暖事件评定及其对夏季雨型的之后效应.陈兴芳(主编).汛期旱涝预测方法研究.北京:气象出版社,2000.109~113.
[20] 陈晓光,金秀玲.ENSO与宁夏夏季降水关系的分析[J].甘肃气象,1998,16(1):48~52.
[21] 薛 燕,韩 萍,冯国华.半个世纪以来新疆降水和气温的变化趋势[J].干旱区研究,2003,20(2):127~130.
[22] 翟盘茂.中国降水极值变化趋势检测[J].气象学报,1999,57(2):208~216.
[23] 张祖强,丁一汇,赵宗慈,等.热带太平洋经向风异常年际变化与海温异常的关系[J].热带气象学报,2002,18(2):111~120.
[24] RASMUSSON EM, WANG XL,ROPELEWSKIC.The biennial component of ENSO variability[J].J Mar sys,1990,1(1):71- 96.
[25] Yasunari T.Role of asian monsoon on the interannual variability of the global climate system [J]. J Meteor Soc Japan, 1992,70: 177-189.
[26] Woolhiser D A, Keefer T O, Redmond K T. Southern Oscillation effects on daily precipitation in the southwestern United States[J]. Water Resources Research,1993, 29(4): 1287-1295.
[27] Guti'errez F, Dracup J A. An analysis of the feasibility of long-range streamflow forecasting for Colombia using EL Nino-Southern Oscillation indicators[J]. Journal of Hydrology, 2001,246: 181-196.
[28] Z X Xu, K Takeuchi H. Ishidaira.Correlation between EL Nino-Southern Oscillation (ENSO) and precipitation in South-east Asia and the Pacific region. Hydrological Process[J]. 2004,18:107-123.
[29] C Gaucherel.A study of the possible extended influence of the ENSO phenomenon [J].C.R.Geoscience, 2004,336:75-185.
