Collect ｜ Homepage Advertisement ｜ Contact us ｜ Message
Adv. search

Arid Land Geography >

2019 , Vol. 42 >Issue 6: 1301 - 1309

DOI: https://doi.org/10.12118/j.issn.1000-6060.2019.06.08

Change characteristics of dry and wet spells in northwest China during the past 58 years

Expand
  • School of Forestry,Northeast Forest University,Harbin 150030,Heilongjiang,China

Received date: 2019-04-01

  Revised date: 2019-07-24

  Online published: 2019-11-17

Fold

Abstract

Northwest China has become warmer and wetter during the past several decades, which has profound influence on the fragile ecological environment. In this study, using the daily precipitation data of 68 stations in northwest China from 1960 to 2017, setting daily precipitation less than (greater than or equal to) 0.1 mm and less than (greater than or equal to) 1 mm as dry day (wet day), respectively. The distribution of precipitation during the year was analyzed based on indicators of dry and wet spells. The results show that in addition to the change of number of dry and wet days, the distribution of the dry and wet days also changes during the year. There are spatial differences in the change characteristic of rainfall, dry spells and wet spells in the northwest China. In the eastern part of northwest China, the total number of dry periods was increased, the number of dry spells and mean length of dry spells and maximum length of dry spells did not change significantly, while wet days and wet spells were decreased. In the absence of significant changes in rainfall in the region, the frequency of rainfall was decreased significantly and the average rainfall intensity was increased significantly. In the western part of northwest China, the increase of rainfall is caused by the increase of rainfall intensity and frequency. The characteristics of dry and wet period change show that wet days were more dispersed during the year, and the total number of wet days in wet spells and the number of wet spells were increased, while there was no significant change in the mean length of wet spells. On the other hand, the number of dry spells was increased and the mean length of dry spells and maximum length of dry spells were decreased, which could alleviate the drought condition in the western part of northwest China. Different from the long-term drought research, the distribution of dry days and wet days during the year were analyzed from the perspective of the change characteristics of dry and wet spells. By this way, the short-term water condition in these regions can be better demonstrated. In addition, the threshold of wet days and dry days have obvious influence on the results, which needs to be further studied according to the regional climate condition.

Key words： dry spell; wet spell; distribution of precipitation; threshold

Cite this article

LIAN Lu-yao, LIU Bin-hui . Change characteristics of dry and wet spells in northwest China during the past 58 years [J]. Arid Land Geography, 2019 , 42(6) : 1301 -1309 . DOI: 10.12118/j.issn.1000-6060.2019.06.08

References

［1］OBASI G O P.WMO’s role in the international decade for natural disaster reduction［J］.Bulletin of the American Meteorological Society,1994,75(9):1655-1661. ［2］任瑾,罗哲贤.从降水看我国黄土高原地区的干旱气候特征［J］.干旱地区农业研究,1989,(2):36-43.［REN Jin,LUO Zhexian.Dry climatological feature on the Loess Plateau in view of rainfall in China［J］.Agricultural Research in the Arid Areas,1989,(2):36-43.］ ［3］钱正安,吴统文,宋敏红,等.干旱灾害和我国西北干旱气候的研究进展及问题［J］.地球科学进展,2001,16(1):28-38.［QIAN Zheng’an,WU Tongwen,SONG Minhong,et al.Arid disaster and advances in arid climate researches over northwest China［J］.Advance in Earth Sciences,2001,16(1):28-38.］ ［4］于淑秋,林学椿,徐祥德.我国西北地区近50年降水和温度的变化［J］.气候与环境研究,2003,8(1):9-18.［YU Shuqiu,LIN Xuechun,XU Xiangde.The climatic change in northwest China in recent 50 years［J］.Climatic and Environmental Research,2003,8(1):9-18.］ ［5］张强,邓振镛,赵映东,等.全球气候变化对我国西北地区农业的影响［J］.生态学报,2008,28(3):1210-1218.［ZHANG Qiang,DENG Zhenyong,ZHAO Yingdong,et al.The impacts of global climatic change on the agriculture in northwest China［J］.Acta Ecologica Sinica,2008,28(3):1210-1218.］ ［6］施雅风,沈永平,胡汝骥.西北气候由暖干向暖湿转型的信号、影响和前景初步探讨［J］.冰川冻土,2002,24(3):219-226.［SHI Yafeng,SHEN Yongping,HU Ruji.Preliminary study on signal,impact and foreground on climatic shift from warm-dry to warm-humid in northwest China［J］.Journal of Glaciology and Geocryology,2002,24(3):219-226.］ ［7］施雅风,沈永平,李栋梁,等.中国西北气候由暖干向暖湿转型的特征和趋势探讨［J］.第四纪研究,2003,23(2):152-164.［SHI Yafeng,SHEN Yongping,LI Dongliang,et al.Discussion on the present climate change from warm-dry to warm-wet in northwest China［J］.Quaternary and Sciences,2003,23(2):152-164.］ ［8］杨晓丹,翟盘茂.我国西北地区降水强度、频率和总量变化［J］.科技导报,2005,23(6):24-26.［YANG Xiaodan,ZHAI Panmao.Changes in precipitation intensity,frequency and total in northwest China［J］.Resource & Environment Review,2005,23(6):24-26.］ ［9］[JP2]闫炎,赵昕奕,周力平.近50年中国西北地区干湿演变的时空特征及其可能成因探讨［J］.干旱区资源与环境,2010,24(4):38-44.［YAN Yan,ZHAO Xinyi,ZHOU Liping.The temporal and spatial characteristics of aridity and wetness variation in northwest China during recent 50 years and the factor analysis［J］.Journal of Arid Land Resources and Environment,2010,24(4):38-44.］ ［10］齐月,陈海燕,房世波,等.1961—2010年西北地区极端气候事件变化特征［J］.干旱气象,2015,33(6):963-969.［QI Yue,CHEN Haiyan,FANG Shibo,et al.Variation characteristics of extreme climate events in northwest China during 1961—2010［J］.Journal of Arid Meteorology,2015,33(6):963-969.］ ［11］汪宝龙,张明军,魏军林,等.西北地区近50 a气温和降水极端事件的变化特征［J］.自然资源学报,2012(10):1720-1733.［WANG Baolong,ZHANG Mingjun,WEI Junlin,et al.The change in extreme events of temperature and precipitation over northwest China in recent 50 years［J］.Journal of Natural Resources,2012,27(10):1720-1733.］ ［12］WANG H J,CHEN Y N,CHEN Z S.Spatial distribution and temporal trends of mean precipitation and extremes in the arid region,northwest of China,during 1960—2010［J］.Hydrological Processes,2013,27(12):1807-1818. ［13］陈少勇,任燕,乔立,等.中国西北地区大雨以上降水日数的时空分布特征［J］.资源科学,2011,33(5):958-965.［CHEN Shaoyong,REN Yan,QIAO Li,et al.Temporal and spatial distribution characteristics of days with above heavy rainfall over northwestern China［J］.Resource Science,2011,33(5):958-965.］ ［14］陈冬冬,戴永久.近五十年我国西北地区降水强度变化特征［J］.大气科学,2009,33(5):923-935.［CHEN Dongdong,DAI Yongjiu.Characteristics of northwest China rainfall intensity in recent 50 years［J］.Chinese Journal of Atmospheric Science,2009,33(5):923-935.］ ［15］刘波,肖子牛.1961—2005年新疆区域分级雨日(量)的气候特征［J］ .干旱区地理,2011,34(3):419-428.［LIU Bo,XIAO Ziniu.Climatic feature of graded rain in Xinjiang from 1961 to 2005［J］.Arid Land Geography,2011,34(3):419-428.］ ［16］ZOU X K,ZHAI P M,ZHANG Q.Variations in droughts over China:1951—2003［J］.Geophysical Research Letters,2005,32(4):353-368. ［17］杨金虎,江志红,刘晓芸,等.近半个世纪中国西北干湿演变及持续性特征分析［J］.干旱区地理,2012,35(1):10-22.［YANG Jinhu,JIANG Zhihong,LIU Xiaoyun,et al.Influence research on spring vegetation of Eurasia to summer drought-witness over the northwest China［J］.Arid Land Geography,2012,35(1):10-22.］ ［18］GROISMAN P Y,KNIGHT R W.Prolonged dry episodes over the conterminous United States: New tendencies emerging during the last 40 years［J］.Journal of Climate,2010,21(9):1850-1862. ［19］BICHET A,DIEHIOU A.West African Sahel has become wetter during the last 30 years,but dry spells are shorter and more frequent［J］.Climate Research,2018,75(2):155-162. ［20］MCCABE G J,LEGATES D R,LINS H F.Variability and trends in dry day frequency and dry event length in the southwestern United States［J］.Journal of Geophysical Research Atmospheres,2010,115(D7):D07108. ［21］YE H C.Changes in duration of dry and wet spells associated with air temperatures in Russia［J］.Environmental Research Letters,2018,13(3):1-14. ［22］LEI Y H,DUAN A M.Prolonged dry episodes and drought over China［J］.International Journal of Climatology,2011,31(12):1831-1840. ［23］LIU X D,LIU B H,HENDERSON M,et al.Observed changes in dry day frequency and prolonged dry episodes in northeast China［J］.International Journal of Climatology,2015,35(2):196-214. ［24］HUANG J,LIU F L,XUE Y,et al.The spatial and temporal analysis of precipitation concentration and dry spell in Qinghai,northwest China［J］.Stochastic Environmental Research & Risk Assessment,2015,29(5):1403-1411. ［25］ZHANG Q,SINGH V P,LI J F,et al.Analysis of the periods of maximum consecutive wet days in China［J］.Journal of Geophysical Research Atmospheres,2011,116(D23):D23106. ［26］张翀,李晶,任志远.西北地区1962年至2000年降水量变化的时空特征分析［J］.资源科学,2010,32(12):2298-2304.［ZHANG Chong,LI Jing,REN Zhiyuan.Spatial and temporal characteristics of precipitation changes from 1962 to 2000 in northwestern China［J］.Resources Science,2010,32(12):2298-2304.］ ［27］白爱娟,刘晓东.从气候标准的改变分析西北地区的气候变化［J］.干旱区研究,2005,22(4):458-464.［BAI Aijuan,LIU Xiaodong.Analysis on the climate change from warming-drying trend to warming-wetting trend in northwest China［J］.Arid Zone Research,2005,22(4):458-464.］ ［28］任国玉,袁玉江,柳艳菊,等.我国西北干燥区降水变化规律［J］.干旱区研究,2016,33(1):1-19.［REN Guoyu,YUAN Yujiang,LIU Yanju,et al.Changes in precipitation over northwest China［J］.Arid Zone Research,2005,22(4):458-464.］ ［29］赵红岩,王有恒,王兴,等.1961—2008年中国西北东部旱涝异常分布及干旱变化特征［J］.干旱区地理,2012,35(4):552-558.［ZHAO Hongyan,WANG Youheng,WANG Xing,et al.Anomaly distribution of drought-flood and changing characteristics of arid over eastern northwest China during 1961—2008［J］.Arid Land Geography,2012,35(4): 552-558.］ ［30］钱莉,杨永龙,张宇林,等.河西走廊东部极端降水的时空分布及影响因子分析［J］.干旱区地理,2015,38(2):207-214.［QIAN Li,YANG Yonglong,ZHANG Yulin,et al.Temporal and spatial distribution and influence factors of extreme precipitation in eastern Hexi Corridor［J］ .Arid Land Geography,2015,38(2):207-214.］ ［31］WANG H J,CHEN Y N,PAN Y P.Characteristics of drought in the arid region of northwestern China［J］.Climate Research,2015,62(2):99-113. ［32］LIU X M,ZHANG D,LUO Y Z,et al.Spatial and temporal changes in aridity index in northwest China: 1960 to 2010［J］.Theoretical & Applied Climatology,2013,112(1-2):307-316. ［33］陈亚宁,王怀军,王志成,等.西北干旱区极端气候水文事件特征分析［J］.干旱区地理,2017,40(1):1-9.［CHEN Yaning,WANG Huaijun,WANG Zhicheng,et al.Characteristics of extreme climatic/hydrological events in the arid region of northwestern China［J］.Arid Land Geography,2017,40(1):1-9.］ ［34］PENDERGRASS A G.What precipitation is extreme［J］? Science,2018,360(6393):1072-1073.
Options
Outlines

/

〈 〉