| 不同植被LAI的MODIS反演及其在青藏高原东部的应用 |
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| 引用本文： | 张杰,张强,李栋梁,王文.不同植被LAI的MODIS反演及其在青藏高原东部的应用[J].高原气象,2008,27(4). |
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| 作者姓名： | 张杰 张强 李栋梁 王文 |
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| 作者单位： | 1. 中国气象局,兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点实验室,甘肃,兰州730020
2. 南京信息工程大学,大气科学学院,江苏,南京210044 |
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| 基金项目： | 干旱基金，甘肃省自然科学基金，国家自然科学基金 |
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| 摘 要： | 应用Terra和Aqua卫星的MODIS资料和三维叶分布模式,结合MODIS陆地植被覆盖产品数据,估算了6种生物群落的LAI,并与我国西北地区叶面积仪观测结果进行了对比和分析。结果表明,从两颗卫星连续8天的观测资料可以估算出LAI,反演结果的相对误差基本在±20%以内,平均相对误差为13.7%,说明该方法可以反演实际植被的LAI;根据植被类型的差异,建立了6种生物群落LAI与NDVI的指数关系,相关性较好;青藏高原东部的LAI时间变化有不一致性的特征,反映了不同生物群落的生物学特性的差异;不同季节的LAI变化在空间上有很大差异,说明本研究区域西部冷、干和高原东部相对暖、湿的复杂气候特征。
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| 关 键 词： | 6种生物群落 LAI MODIS 青藏高原及周边地区 多时相多角度观测 |
MODIS Retrieval of Different Vegetation LAI and Its Application to the East of Qinghai-Xizang Plateau |
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| ZHANG Jie,ZHANG Qiang,LI Dong-liang,WANG Wen.MODIS Retrieval of Different Vegetation LAI and Its Application to the East of Qinghai-Xizang Plateau[J].Plateau Meteorology,2008,27(4). |
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| Authors: | ZHANG Jie ZHANG Qiang LI Dong-liang WANG Wen |
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| Abstract: | Combined MODIS data from Terra and Aqua satellites with Iaquinta and Pinty model and land cover product,LAI of 6 type biology communities in the east of Qinghai-Xizang Plateau is retrieved,moreover,contrast of LAI with observed LAI from Li-3000 instrument have been done.The results show that LAI can be retrieved by the 8 day-long data of two satellites,relative error of retrieval result is less than 20%,averaged relative error is 13.7%,which means that this method can be used for retrieval of LAI.According to difference of vegetation type,exponent relations of LAI with NDVI of 6 type biology community have been formed,the relativity is good.Temporal series of LAI of different vegetation types are not in agreement with each other,which show difference of growth period of biology character,spatial distribution of LAI is also different,which means that the climate is different in the various regions. |
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| Keywords: | 6 type biology communities LAI MODIS Qinghai-Xizang Plateau Multi-temporal and multi-angle observed data |
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