内蒙古高原内陆河流域植被净初级生产力时空演变特征及其驱动因素OA北大核心CHSSCDCSTPCD
Spatio-temporal evolution characteristics and driving factors of net primary productivity of vegetation in the Inland River Basin of the Inner Mongolia Plateau
认识内陆河流域植被净初级生产力时空演变特征及驱动因素对于流域的可持续发展具有重要意义.基于Carnegie-Ames-Stanford Approach(CASA)模型计算了1984-2015年内蒙古高原内陆河流域净初级生产力(NPP)并验证模型精度,运用Theil-Sen中值法、Mann-Kendall趋势检验和重心模型等方法分析NPP时空变化规律,运用pearson相关系数分析NPP与气候因子(降水和气温)之间的相关性,采用交叉小波方法分析降水、气温、厄尔尼诺-南方涛动(ENSO)、北极涛动(AO)、太阳黑子(sunspot)对植被NPP的驱动作用.结果表明:(1)高原内陆河流域1984-2015年NPP年均值介于85.548 gC m-2 a-1(2007年)一130.344 gC m-2 a-1(2012年),多年均值为103.737 gC m-2 a-1,2007-2012年NPP明显增加.(2)大多数地区表现为稳定状态,NPP极显著减少、显著减少、不显著减少、不显著增加、显著增加和极显著增加的区域面积占比分别为5.2％、3.2％、44.2％、37.8％、4.3％和5.3％.(3)高原内陆河流域NPP的重心主要分布在阿巴嘎旗和锡林浩特市的交界处,即高原内陆河流域偏东部地区,NPP重心在东北地区较多,占比为75％,这表明NPP在东北地区增速远高于其他地区.(4)降水对高原内陆河流域NPP影响较大,而气温对高原内陆河流域NPP影响较小.大气环流因子以及太阳黑子与内陆河流域植被NPP均存在相关关系,ENSO对植被NPP的影响最大.
It is of great significance for the sustainable development of the Inland River Basin to understand the spatio-temporal evolution characteristics and driving factors of net primary productivity(NPP)of vegetation.Based on the Carnegie-Ames-Stanford Approach(CASA)model,this paper calculated the NPP in the plateau Inland River Basin from 1984 to 2015 and verified the model accuracy,and used Theil-Sen median method,Mann-Kendall trend test and Center of gravity model to analyze the temporal and spatial variation law of NPP.Pearson correlation coefficient was used to analyze the correlation between NPP and climate factors(precipitation and temperature),and Cross wavelet method was used to analyze the driving effects of precipitation,air temperature,El Nino-Southern Oscillation(ENSO),Arctic Oscillation(AO)and sunspot on vegetation NPP.The results showed that:(1)The annual average value of NPP in the plateau Inland River Basin from 1984 to 2015 was 85.548 gC m-2 a-1(2007)—130.344 gC m-2 a-1(2012),and the multi-year average was 103.737 gC m-2 a-1,and the NPP increased significantly from 2007 to 2012.(2)Most areas showed a stable state,the proportion of NPP very significantly decreased,significantly decreased,not significantly decreased,not significantly increased,significantly increased and very significantly increased area was 5.2％,3.2％,44.2％,37.8％,4.3％and 5.3％,respectively.(3)The center of gravity of NPP in the plateau Inland River Basin was mainly distributed at the junction of Abaga Banner and Xilinhot City,that is the eastern part of the plateau Inland River Basin.The center of NPP gravity was more in the northeast region,accounting for 75％,which indicated that the growth rate of NPP in the northeast region was much higher than that in other region.(4)Precipitation had a greater effect on NPP,while temperature had a small effect on the NPP in the plateau Inland River Basin.Atmospheric circulation factors and sunspots were correlated with NPP of vegetation in Inland River Basin,and ENSO had the greatest influence on NPP.
刘健;张泽中;冯凯;王飞;张伟杰;王思楠;孙立新;郭恒志
华北水利水电大学,郑州 450046水利部牧区水利科学研究所,呼和浩特 010018||中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京 100038
净初级生产力高原内陆河流域CASA模型重心模型驱动因素
net primary productivityInland River BasinCASA modelCenter of gravity modeldrivers
《生态学报》 2024 (022)
10055-10067 / 13
国家自然科学基金(42301024);中国水利水电科学研究院阴山北麓草原生态水文国家观测研究站(YSS202112,YSS202118)
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