不同类型生态系统水热碳通量的监测与研究
Monitoring and Simulation of Water, Heat and CO_2 Fluxes in Various Terrestrial Ecosystems
查看参考文献25篇
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文摘
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亚太地区环境革新战略项目(APEIS)在中国5种主要生态系统类型区(草地:海北、耕地:禹城、稻田:桃源、林地:千烟洲、荒漠:阜康)建立了一个以连续观测能量、水分和碳素通量为中心,包括气象、水文、土壤、植被等各项生态要素的监测网络系统,被称之为APEIS-FLUX系统.作者首先对APEIS-FLUX系统的观测数据进行了初步分析,表明该系统稳定可靠,它可以实时地提供高质量、高精度、长期而连续的通量及生态要素的观测数据.对数据的比较清楚地反映出了不同生态系统类型区的水热碳通量的差异性.其次,利用APEIS-FLUX数据对美国航空航天局(NASA)的MODIS数据产品进行比较验证后发现,除部分产品如地表面温度(MOD11)等与观测数据较吻合以外,大部分数据产品如土地覆盖(MOD12),叶面积指数(MOD15)和光合速率与净第一性生产力(MOD17)等都与观测数据相差深远,有必要对其处理程序和模式进行修正.为此,我们利用APEIS-FLUX的数据作为MOD15和MOD17的生成模型(BIOME-BGC)的输入数据,并对该模型的有关参数进行了修订.结果表明,该模式在通过修正后,可以很好地模拟植被的生长过程及其相应的水热碳循环过程. |
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其他语种文摘
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Water vapor, heat and CO2 fluxes as well as ecosystem characteristics have been measured at 5 sites in different ecological systems at Haibei (grassland), Yucheng (dryland), Taoyuan (paddy field), Qianyanzhou (forest land) and Fukang (saline desert) in China since the spring of 2002. These sites were set up initially for the validation of satellite data obtained from MODIS station established for the project "Asia-Pacific Environmental Innovation Strategy (APEIS)", which was launched in 2001 by the Ministry of the Environment of Japan, so we called them APEIS-FLUX system. The main objective of this study was to validate estimates of surface temperature, evaporation, soil moisture, as well as leaf area index and net primary productivity (NPP) generated by MODIS satellite data, and to understand the mechanisms controlling the exchanges of energy, water vapor and CO_2 across a spectrum of time and space scales. The results show that both latent flux and CO_2 flux are much higher in the crop field than those in the grassland and the saline desert, but the sensible heat flux is in the opposite way. Using the observed data to validate the MODIS data products, we found that different products have very different correspondence, which suggests that the algorithm to be used to process MODIS products needs to be revised by using the local dataset. We used the APEIS-FLUX data as the inputs and parameters of Biome-BGC model, and found that the revised model can simulate wheat growing process, heat and carbon fluxes over it well. |
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来源
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地理学报
,2004,59(1):13-24 【核心库】
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关键词
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APEIS-FLUX系统
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水碳通量
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MODIS数据
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陆地生态系统
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地址
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1.
日本国立环境研究所, 筑波
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中国科学院新疆地理与生态研究所, 北京, 100101
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中国科学院西北高原生物研究所, 乌鲁木齐, 830011
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中国科学院西北高原生物研究所, 西宁, 810008
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中国科学院亚热带农业生态研究所, 长沙, 410125
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0375-5444 |
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学科
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自然地理学 |
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基金
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中国-日本合作亚太地区环境创新战略计划（APEIS）项目
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文献收藏号
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CSCD:1502999
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