| ChinaFLUX CO2通量数据处理系统与应用 |
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| 引用本文： | 李春,何洪林,刘敏,苏文,伏玉玲,张雷明,温学发,于贵瑞.ChinaFLUX CO2通量数据处理系统与应用[J].地球信息科学,2008,10(5):557-565. |
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| 作者姓名： | 李春 何洪林 刘敏 苏文 伏玉玲 张雷明 温学发 于贵瑞 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所, 北京 100101;
2. 天津市气象局气候中心, 天津300074;
3. 南京师范大学地理科学学院, 南京 210097 |
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| 基金项目： | 国家自然科学基金，中国科学院科研基金 |
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| 摘 要： | CO2通量观测数据的规范处理及其高质量数据产品的发布,是CO2通量及其相关领域研究的前提和基础。为解决目前通量观测数据处理工作中存在的过程繁琐、方法不统一、处理不及时等问题,本研究以MATLAB为开发工具,利用其强大的数学计算功能和可视化GUI技术,集成目前主要的通量数据处理方法,开发了一套具有自主知识产权的中国通量网(ChinaFLUX)通量观测数据处理系统。该系统的处理对象为30min的CO2通量观测数据,其主要处理步骤包括湍流通量计算、观测数据的质量控制/质量保证、缺失观测数据的插补,以及不同时间尺度下碳交换量的分解和计算等。该系统自动化程度高、可视化程度强,为ChinaFLUX通量观测数据处理及服务提供了一个良好的平台。
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| 关 键 词： | 通量观测数据处理系统 ChinaFLUX MATLAB 规范化 |
| 收稿时间： | 2007-01-22; |
The Design and Application of CO2 Flux Data Processing System at ChinaFLUX |
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| LI Chun,HE Honglin,LIU Min,SU Wen,FU Yuling,ZHANG Leiming,WEN Xuefa,YU Guirui.The Design and Application of CO2 Flux Data Processing System at ChinaFLUX[J].Geo-information Science,2008,10(5):557-565. |
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| Authors: | LI Chun HE Honglin LIU Min SU Wen FU Yuling ZHANG Leiming WEN Xuefa YU Guirui |
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| Institution: | 1. Tianjin Meteorological Bureau, Tianjing 300074, China;
2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
3. Nanjing Normal University College of Geographical Sciences, Nanjing 210097, China |
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| Abstract: | The standardized processing of observed CO2 flux data and issue of high grade data product are the precondition and foundation of researches at CO2 Flux and its related field.However,there are a system of problems when we process these observed flux data,such as tedious processing,unified methods and lag of processing.In order to solve these problems,we choose MATLAB as development toolkit.Through making a use of its powerful mathematical computation functions and visible GUI technology,and through making an integration of current flux data processing methods,we developed the processing system of observed flux data at ChinaFLUX with independent intellectual property rights.The processing object is to observe CO2 flux data with half-hour interval.The main processing steps included turbulent flux computation,quality control/quality assurance of observed data,gap filling of missing data,separation and computation of carbon flux exchange at different time scales and so on.On the basis of current researches at ChinaFLUX,we improved the algorithms of abnormal data rejection,u* threshold determination and nonlinear gap-filling method,which we considered to be optimal.The outputs of NEE,GEE and Re at Qianyanzhou Flux Tower at ChinaFlux are-352.19 gC m-2 y-1,1 284.88 gC m-2 y-1 and-1 637.07 gC m-2 y-1,which are similar to other research results.This system,with high automaticity and visualization,can provide a valid platform for processing observed CO2 flux data. |
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| Keywords: | ChinaFLUX MATLAB |
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