地球信息科学学报 ›› 2013, Vol. 15 ›› Issue (1): 144-151.doi: 10.3724/SP.J.1047.2013.00144

• 遥感技术与应用 • 上一篇    下一篇

基于MODIS的光合有效辐射估算系统设计与实现

曹巍1, 邵全琴1, 陈卓奇2   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 北京师范大学全球变化与地球系统科学研究院, 北京 100875
  • 收稿日期:2012-05-07 修回日期:2012-10-22 出版日期:2013-02-25 发布日期:2013-02-25
  • 通讯作者: 邵全琴(1962-),女,江苏常州人,博士,研究员,主要研究方向:GIS与生态信息。E-mail:shaoqq@lreis.ac.cn E-mail:shaoqq@lreis.ac.cn
  • 作者简介:曹巍(1982-),男,湖北武汉人,博士,助研,主要研究方向:土地利用/覆被变化,生态系统评估。E-mail:caowei@igsnrr.ac.cn
  • 基金资助:

    国家"973"计划项目(2010CB950902)。

Design and Implementation of the PAR Calculation System Based on MODIS Data

CAO Wei1, SHAO Quanqin1, CHEN Zhuoqi2   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
  • Received:2012-05-07 Revised:2012-10-22 Online:2013-02-25 Published:2013-02-25

摘要:

本文采用PARcalc算法,并以C#和ENVI/IDL二次开发语言,设计了主要以MODIS产品为驱动的光合有效辐射估算系统。鉴此,比较了IDL和ArcGIS Engine两者的技术特点,设计了IDL与ArcGIS Engine共存、多种开发环境相结合的技术方案。同时,对模型参数置备、光合有效辐射估算、模型分析等模块的功能,以及多种语言混合编程、数据分块处理、瞬时及日光合有效辐射批量计算等关键技术进行了分析。最后,以内蒙古地区作为研究区,估算了该区2007全年和四季的总光合有效辐射及日均光合有效辐射,并对其特征值作了对比分析。结果表明,对研究区域尺度光合有效辐射的定量化计算具有一定的参考价值。

关键词: IDL, PARcalc, 光合有效辐射, MODIS

Abstract:

In this paper we developed a PAR (photosynthetically active radiation) calculation system based on PARcalc algorithm which was driven by MODIS data. Before designing, we compared the characteristic of IDL with ArcGIS Engine, and analyzed the requirements of system functions. Therefore we designed a technical scheme which integrated IDL with ArcGIS Engine together, and chose C# as the main programming language. The communication between C# and IDL is dependent on the IDL ActiveX component. Then we gave a detailed introduction to the main modules and functions of the system and analyzed the key techniques for the implementation such as programming with C# and IDL in the same environment, data partition, batch computation of incident PAR, and batch computation of daily PAR by LM (Levenberg-Marquardt) algorithm. Finally we calculated the annual and seasonal PAR in Inner Mongolia in 2007 by the system, and made a statistic of the characteristic value. The results showed that the system provided a friendly man-machine interaction. It was easy to use and met the demands of practical applications. It had great reference value for PAR calculation in regional scale.

Key words: photosynthetically active radiation, PARcalc, MODIS, IDL