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气候变化对渭河流域自然植被净初级生产力的影响研究(Ⅱ)——渭河流域自然植被净初级生产力的研究 被引量:7

Effect of climate change on net primary productivity(NPP) of natural vegetation in Wei river basin(Ⅱ).NPP of natural vegetation in Wei river basin
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摘要 利用渭河流域及其周边地区52个气象站1959~2010年的逐日气象资料,采用周广胜-张新时模型、Penman-Monteith模型、气候倾向率、相关分析和Spline插值等方法,分析了近52年湿润指数的时空变化特征及其对NPP(自然植被净第一性生产力)的影响,并对未来不同的气候变化情景下NPP对气候变化的可能响应进行预估。结果表明:NPP高值区位于秦岭山区、关中部分地区、子午岭、六盘山和华山地区,总体呈下降趋势(P>0.1),仅个别站点微弱上升;NPP与降水、相对湿度和湿润指数成正相关(P<0.001),与潜在蒸散量、日照时数和气温负相关,温度对于NPP累积起到的作用有限,降水是主要制约因素;不同的气候情景对NPP的模拟表明,温度和降水同时上升的情况下NPP增幅15%以上,仅温度升高而降水不变NPP增加10%左右,温度上升而降水下降导致NPP不升反降,仅个别地区出现小幅上升。 Based on the daily data observed by 52 meteorological stations from 1959 to 2010, NPP values were calculated using Zhou Guangsheng and Zhang Xinshi model, the spatiotemporal variation of humid index, NPP and their relations were analyzed using linear regression, correlation analysis and Spline spatial interpolation method. The response of NPP to the change of annual temperature and precipitation in the future was discussed. The main results were as follows: NPP was larger in Qin Mountain, Ziwu Mountain, and Hua Mountain. NPP of the whole basin was decreasing while a few stations presented a slight increasing trend. The trend rate of NPP in southern part was bigger than northern part. NPP correlated positively with humid index and precipitation, while correlated negatively with potential evaportranspiration, sunshine duration and temperature. Temperature has limited impact on accumulation of NPP, water was the main factor; ③The result of prediction demonstrated that under the scenarios of temperature increases of 2℃ and precipitation increases of 20% or 0% , NPP will be increased by approximately 15% and 10% respectively. Once the annual precipitation decreased by 20% the NPP will also decrease, only a few stations show insignificant increasement.
出处 《干旱区资源与环境》 CSSCI CSCD 北大核心 2013年第5期53-57,共5页 Journal of Arid Land Resources and Environment
基金 国家自然科学基金项目"基于相同气候条件的人类活动对河流水沙影响定量评价-以黄土高原延河流域为例"(41171420) 中国科学院水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目"北方旱区表层土壤水分遥感监测试验研究"(10502-Z12-9) 中荷联合主题研究项目"渭河流域水环境问题综合治理对策研究"(中国科学院对外合作重点项目GJHZ1018 Netherlands Organization for Scientific Research OND1339291)资助
关键词 渭河流域 气候变化 自然植被 净初级生产力(NPP) 湿润指数 Wei river basin climate change natural vegetation net primary productivity (NPP) humid index
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