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[1]QIANG Haofan,JIN Xiaoyan,ZHAO Lu,et al.Dry-Wet Condition Variations in Zoige Wetland in Recent 56 Years Based on Relative Humidity Index[J].Research of Soil and Water Conservation,2018,25(01):172-177,182.

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Dry-Wet Condition Variations in Zoige Wetland in Recent 56 Years Based on Relative Humidity Index

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 172-177,182 Column: Public date: 2018-02-28

Title:: Dry-Wet Condition Variations in Zoige Wetland in Recent 56 Years Based on Relative Humidity Index

Author(s):: QIANG Haofan^1,2, JIN Xiaoyan^1,2, ZHAO Lu^1,2, LU Zehua³; 1. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China;
2. Provincial Key Laboratory of Water-Saving Agriculture in Hilly Areas of South China, Chengdu 610066, China;
3. Farmland Water Conservancy of Sichuan Province, Chengdu 610000, China

Keywords:: Zoige Wetland; relative humidity index; Mann-Kendall method; wavelet analysis; season variations

CLC:: P462.2

DOI:: -

Abstract:: Based on the daily meteorological data from 5 stations in Zoige Wetland, the relative humidity index was calculated. Mann-Kendall method and Morlet wavelet analysis were used to analyze the changes of dry-wet conditions and meteorological elements in recent 56 years. The Pearson correlation coefficient method was used to study the cause of relative humidity index variations. The results showed that:(1) the annual relative humidity index of Zoige Wetland was significantly decreasing (p < 0.05) with the tendency of -0.018/decade, showing the significantly dry trend, it was relative arid in winter and spring with the trend towards humidification, while summer and autumn were humid relatively with the trend towards acidification in recent 56 years, the drought was most serious in winter, followed by spring, year, summer and autumn; (2) there was the significant abrupt point of autumn towards acidification in 1995 (p < 0.05) while no mutant phenomena were found in other time scales; (3) periodic oscillation with multiple times scales of annual and seasonal relative humidity index existed with the oscillation circulation of 25～30 years, 12～15 years and 7～10 years, and winter may still be dry in future short-term; (4) the decrease of precipitation and relative humidity, increase of sunshine duration and potential evapotranspiration played the major role in wetland drying tendency, while the effect of average temperature and wind speed increase was minor. Precipitation was the dominant factor on the dry-wet condition variations of wetland.

References:: [1] IPCC. Climate Change 2013:the physical science basis, the summary for policymakers of the working groupⅠcontribution to the Fifth Assessment Report[M]. New York:Cambridge University Press, 2013.
[2] 秦大河,陈宜瑜,李学勇.中国气候与环境演变(上卷)[M].北京:科学出版社,2005.
[3] Zargar A, Sadiq R, Naser B, et al. A review of drought indices[J]. Environmental Reviews, 2011,19(NA):333-349.
[4] 姚玉璧,张强,王劲松,等.气候变暖背景下中国西南干旱时空分异特征[J].资源科学,2015,37(9):1774-1784.
[5] 刘宇峰,原志华,封建民,等.基于地表湿润指数的1959-2014年陕西省地表干湿时空变化特征[J].干旱区地理,2016,39(6):1186-1196.
[6] 王芳芳,魏勇.石河子垦区冬小麦生育期干旱变化特征[J].水土保持研究,2016,23(6):238-247.
[7] 王莺,李耀辉,姚玉璧,等.石羊河流域地表干湿变化的时空分布特征[J].资源科学,2013,35(10):2112-2120.
[8] 姚玉璧,张强,王劲松,等.中国西南干旱对气候变暖的相应特征[J].生态环境学报,2014,23(9):1409-1417.
[9] 张秋劲.若尔盖国家级生态功能保护区可持续发展研究[D].成都:四川大学,2004.
[10] 刘红玉,白云芳.若尔盖高原湿地资源变化过程与机制分析[J].自然资源学报,2006,21(5):810-818.
[11] 李斌,董锁成,江晓波,等.若尔盖湿地草原沙化驱动因素分析[J].水土保持研究,2008,15(3):112-120.
[12] 王明田,王翔,黄晚华,等.基于相对湿润指数的西南地区季节性干旱时空分布特征[J].农业工程学报,2012,28(19):85-92.
[13] 中国气象局.GB/T20481-2006.气候干旱等级[S].北京:中国标准出版社,2007.
[14] Allen R G, Pereira L S, Raes D, et al. Crop evapotranspiration-Guidelines for computing crop water requirements-FAO irrigation and drainage paper 56[M]. Rome:FAO-Food and Agriculture Organization of the United Nations, 1998.
[15] 刘新安,于贵瑞,何洪林,等.中国地表净辐射推算方法的研究[J].自然资源学报,2006,21(1):139-145.
[16] 左大康,王懿贤,陈建绥.中国地区太阳总辐射的空间分布特征[J].气象学报,1963,33(1):78-96.
[17] 魏凤英.现代气候统计诊断与预测技术[M].北京:气象出版社,2013.
[18] Kendall M G. Rank Correlation Measures[M]. London:Charles Griffin, 1975.
[19] 王文圣,丁晶,李跃清.水文小波分析[M].北京:化学工业出版社,2005.
[20] 毛飞,唐世浩,孙涵,等.近46年青藏高原干湿气候区动态变化研究[J].大气科学,2008,32(3):499-507.
[21] 王建兵,汪治桂,王素萍.1961-2010年甘肃合作地区草地潜在蒸散量及地表湿润度变化特征[J].干旱区资源与环境,2013,27(11):159-164.
[22] 杨秀海,卓嘎,边多.藏西北高寒牧区气候特征及草地退化原因分析[J].干旱区资源与环境,2009,23(2):113-118.

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