干旱区生态环境知识资源中心(Arid): 不同气象插值方法精度评估及对草地NPP估算的影响

Arid

	不同气象插值方法精度评估及对草地NPP估算的影响
其他题名	Evaluation on Accuracy of Three Meteorological Interpolation Methods and Their Impacts on Grassland NPP Estimation
	朱玉果 1; 杜灵通 1; 谢应忠 2; 刘可 1; 宫菲 1; 丹杨 1; 王乐 1
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2018
卷号	25 期号:6 页码:160-167
中文摘要	以2000-2015年宁夏境内及周边14个气象站点的年均气温及年总降水量为数据基础,分别利用反距离权重法(IDW)、样条函数法、Anusplin插值法对气象数据进行了空间插值并交叉检验,将不同方法插值获取的气象要素空间栅格数据作为模型驱动参数输入CASA模型,研究了气象要素不同插值方法对草地NPP估算精度的影响。结果表明:(1)3种插值法中Anusplin插值法在宁夏区域内气象要素插值的误差最小,精度最高,反距离权重法误差最大,在气温插值中表现最为明显;(2)通过实测数据的检验,CASA模型在宁夏草地NPP估算当中适用性强,模拟的年总NPP空间分布格局与实际情况相符,模拟数据可靠;(3)在不同草地类型的NPP估算中,引用MOD17A3NPP数据作为验证数据对比发现基于Anusplin的气象要素插值数据及CASA模型模拟的NPP一定程度上提高了NPP估算精度,其在干草原、灌丛草原、干荒漠类草原及荒漠草原的估算中精度较高,而在沼泽类和山地草甸的估算效果欠佳,其估算精度有待提高。
英文摘要	Based on the mean annual temperature and mean annual precipitation from 14meteorological observation sites during 2000-2015in Ningxia Province and its adjacent areas,three spatial interpolation methods including the inverse distance weighted interpolation(IDW),spline interpolation and Anusplin were used to interpolate the climate factors respectively.The cross checking method was used to verify the results of interpolation.Based on those results,we had been analyzed the feasibility of CASA model in estimating grassland NPP and the effects of improving interpolate precision on NPP estimation in Ningxia.The main conclusions are as follows.(1)Anusplin method had minimum error and the highest accuracy of interpolating meteorological factors in Ningxia area.IDW method′s interpolating error was the maximum,especially in air temperature interpolation.(2)The CASA model has shown the strong applicability grassland NPP estimating by comparing with the measured data and the spatial distribution pattern of NPP is consistent with the actual situation in Ningxia, therefore,the simulation data are reliable.(3)In NPP estimation of different grassland types,CASA model based on Anusplin interpolation that enhances interpolation accuracy has the little estimating error and improves the precision of NPP estimation by referencing to MOD17A3NPP data as a verified data.The results indicate that CASA model has more accurate in estimation of NPP of semi-arid grassland,shrub grassland, shrub grassland,desert grassland and desert steppe,and the estimation accuracies of NPP of wetland grassland and mountain meadow are poor,and these estimation accuracies should be further improved.
中文关键词	CASA模型 ; 空间插值 ; 草地净初级生产力
英文关键词	CASA model spatial interpolation grassland NPP
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6341445
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238363
作者单位	1.宁夏大学;;宁夏大学, 宁夏西北土地退化与生态系统恢复省部共建国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川;;银川, ;; 750021;;750021; 2.宁夏大学;;宁夏大学;;宁夏大学农学院, 宁夏西北土地退化与生态系统恢复省部共建国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室;;, 银川;;银川;;银川, ;;;; 750021;;750021;;750021
推荐引用方式 GB/T 7714	朱玉果,杜灵通,谢应忠,等. 不同气象插值方法精度评估及对草地NPP估算的影响[J]. 宁夏大学,2018,25(6):160-167.
APA	朱玉果.,杜灵通.,谢应忠.,刘可.,宫菲.,...&王乐.(2018).不同气象插值方法精度评估及对草地NPP估算的影响.水土保持研究,25(6),160-167.
MLA	朱玉果,et al."不同气象插值方法精度评估及对草地NPP估算的影响".水土保持研究 25.6(2018):160-167.