文献类型：期刊文献

中文题名：CASA模型的改进及在干旱区生态系统NPP估算中的应用

英文题名：Improving the CASA model and applying it to estimate the net primary productivity of arid region ecology system

作者：冯益明[1] 姚爱冬[1] 姜丽娜[1]

第一作者：冯益明

机构：[1]中国林业科学研究院荒漠化研究所

年份：2014

期号：8

起止页码：39-43

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2011】；CSSCI:【CSSCI2014_2016】；CSCD:【CSCD2013_2014】；

基金：国家林业局"948"项目"中国干旱区生态系统碳储量估算技术合作研究(2011-4-78)"资助

语种：中文

中文关键词：CASA模型;改进;干旱区生态系统;净初级生产力

外文关键词：CASA model; modification; arid region ecology system; net primary productivity

分类号：X171

摘要：CASA模型是针对北美地区植被而建立的净第一性生产力(NPP)模型,当前,该模型已被广泛应用于陆地生态系统NPP的估算。由于模型是针对北美地区植被而建立,因此,模型在不同于北美地区应用时,其参数需要进行修正。现在已有一些关于CASA模型修正的研究,但修正均未体现干旱区特点。文中以甘肃省为例,在充分考虑干旱区特点基础上,从土地利用/覆盖类型的划分、最大光能利用率的取值、高精度气象数据的选择以及遥感影像数据的选择等方面,对利用CASA模型进行干旱区生态系统NPP估算过程进行改进,使该模型更适用于干旱区。利用改进后的CASA模型模拟了甘肃省各土地利用/覆盖类型的NPP,获得了较高的精度,研究利于探索干旱区生态系统碳计量方法。
CASA （Carnegie Ames Stanford Approach） model was bulk to evaluate the net primary productivity （NPP） of vegetations in North America. At present, the CASA model had been used for estimating the NPP of land ecology system widely. Because the CASA model was built based on the vegetations in North America, the parameters of CASA model needs to modify when it is used in other regions which is different from North Ameri- ca. At present, there were some researches on adjusting the parameters of CASA model, while these researches did not consider the characteristic of arid region. Take Gansu province as a case in this paper, from these aspects such as dividing the land use/land cover types, quantifying the maximum light use efficiency, adopting the high resolution weather data and remote sensing images to improve the estimation NPP process of arid region ecology system by applying the CASA model based on considering the characteristic of arid region fully, and to make the CASA model suitable to estimate the NPP of different land use/land cover types in arid region more accurately. A high simulated precision of NPP to different land use/land cover types in Gansu province had been gotten by adopting the improved CASA model. The study would be benefit to explore the carbon accounting methods of arid region ecology system.