辽河三角洲不同干湿气候区参考蒸散发敏感因子时空变化
作者简介:王炳亮(1977-),男,宁夏灵武人,博士研究生,从事生态水文方面研究。E-mail: wangscott4000@163.com
收稿日期: 2013-01-28
要求修回日期: 2013-04-05
网络出版日期: 2013-09-20
基金资助
中国地质调查局地质调查项目(GZH201200503、1212010611402)及国土资源公益性行业科研专项(201111023)资助
Spatial and Temporal Change of Reference Evapotranspiration Sensitivity in Different Dry and Wet Climate Zones in Liaohe Delta
Received date: 2013-01-28
Request revised date: 2013-04-05
Online published: 2013-09-20
Copyright
王炳亮 , 李国胜 . 辽河三角洲不同干湿气候区参考蒸散发敏感因子时空变化[J]. 地理科学, 2013 , 33(9) : 993 -998 . DOI: 10.13249/j.cnki.sgs.2013.08.993
Based on the long-term meteoro1ogical data at 19 meteorological stations over Liaohe Delta during the period of 1961-2010, the sensitivities of Penman-Monteith ET0 to the mean temperature(Stm), wind speed(Su), relative humidity(Srh) and solar radiation(Srs) were calculated and analyzed in three climate sub-regions over Liaohe Delta. The results show that relative humidity is the most sensitive variable to ET0 in semi-arid sub-region, followed by wind speed, solar radiation and air temperature. While, relative humidity is the most sensitive variable to ET0 in semi-humidity sub-region and coast zone, followed by solar radiation, air temperature and wind speed. Trend analysis and Mann-Kendall significant test in both of seasonal and interannual scale demonstrate that sensitivity coefficients of ET0 to air temperature, wind speed, relative humidity and solar radiation present variation and change trend among semi-arid sub-region, semi-humidity sub-region and coastal zone.
Fig.1 Topography and meteorological stations spatial distribution in Liaohe Delta图1 辽河三角洲地形及气象站点分布 |
Fig.2 Distribution of wet-dry zone in Liaohe Delta图2 辽河三角洲干湿分区 |
Table 1 Sensitivity coefficients for each climate variable in Liaohe Delta表1 不同气候区气象因子的敏感系数 |
Stm | Su | Srh | Srs | |
---|---|---|---|---|
滨海干湿过渡区 | 0.259 | 0.276 | -0.787 | 0.281 |
半湿润亚区 | 0.261 | 0.258 | -0.781 | 0.307 |
半干旱亚区 | 0.236 | 0.310 | -0.660 | 0.258 |
Fig.3 Distribution of sensitivity coefficients for each climate variable in Liaohe Delta (a,b,c and d stand for Stm, Su, Srh and Srs respectively)图3 辽河三角洲区域ET0敏感系数分布(a:Stm;b:Su;c:Srh;d:Srs) |
Table 2 Annual change trends in sensitivity coefficients of 3 climate regions (/10a)表2 ET0对气象因子敏感系数的年际变化趋势(/l0a) |
Tm (℃) | Stm | U (m/s) | Su | RH (%) | Srh | Rs (MJ/m2) | Srs | ET0 (mm) | |
---|---|---|---|---|---|---|---|---|---|
滨海干湿过渡区 | 0.28** | 0.0111 ** | -0.22 ** | 0.0033* | 0.24 | 0.0162** | -84.4** | 0.0049** | -17.5** |
半湿润亚区 | 0.21** | 0.0108 ** | -0.17** | -0.0010 | 0.27 | 0.0242** | -30.9 | 0.0067** | -12.8** |
半干旱亚区 | 0.26** | 0.0030 | -0.02 | 0.0029* | 0.06 | -0.0064 | -82.8** | --0.0012 | 8.8 |
The authors have declared that no competing interests exist.
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