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首页> 外文期刊>International journal of remote sensing >Usability of noise-free daily satellite-observed green-red vegetation index values for monitoring ecosystem changes in Borneo
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Usability of noise-free daily satellite-observed green-red vegetation index values for monitoring ecosystem changes in Borneo

机译：每日无噪声卫星观测的绿红色植被指数值在监测婆罗洲生态系统变化中的可用性

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摘要

We examined the usability of daily green-red vegetation index (GRVI) observations from the Terra and Aqua Moderate Resolution Imaging Spectroradiometer satellite on cloud-free days for monitoring ecosystem changes in Bornean tropical forests at a 500m spatial resolution over 11years (2003-2013). The number of observational days of cloud-free GRVI data in the southwest monsoon period (May-October; 1-5days/month) was greater than that in the northeast monsoon period (November-April; 0-2days/month). Spatial variation in the observation frequency was noticed, with Terra (morning) and Aqua (afternoon) data showing different geographic distribution patterns of cloud-free data. The observation frequency in the western Kalimantan mountains (Sarawak and Sabah) was 1-2days/month greater than that in the eastern mountains (Kalimantan). The quality of cloud-free GRVI data was validated by using sky images taken at the same time as the satellite observations and canopy surface images in a tropical rainforest. In oil palm and acacia plantations and peatlands, which were mainly distributed in coastal regions of Sarawak and West and Central Kalimantan, the cloud-free daily GRVI value fell below zero owing to deforestation and forest degradation caused by forest fire and increased with replanting and vegetation recovery. These results indicate that daily cloud-free GRVI data from multiple satellites collected at different times of the day are required for accurate monitoring of intra- and interannual phenological variation and forest degradation attributed to changes in climatic conditions and deforestation caused by human activities in tropical ecosystems.
机译：我们检查了Terra和Aqua中分辨率成像分光辐射仪卫星在无云日每日进行的绿红色植被指数（GRVI）观测的可用性，以监测11年内（2003-2013）500m空间分辨率的婆罗洲热带森林的生态系统变化。 。西南季风期间（5月至10月； 1-5天/月）的无云GRVI数据观测天数大于东北季风期间（11​​月至4月； 0-2天/月）的观测天数。注意到观测频率的空间变化，Terra（早晨）和Aqua（下午）数据显示了无云数据的不同地理分布模式。加里曼丹西部山脉（沙捞越和沙巴）的观测频率比东部山脉（加里曼丹）高1-2天/月。通过使用与卫星观测同时拍摄的天空图像和热带雨林中的冠层表面图像，可以验证无云GRVI数据的质量。在主要分布在砂拉越和西部以及加里曼丹中部沿海地区的油棕和相思树人工林和泥炭地中，由于森林砍伐和森林大火引起的森林退化，无云日GRVI值降至零以下，并随着补植和植被的增加而增加复苏。这些结果表明，在一天的不同时间收集来自多颗卫星的每日无云GRVI数据对于准确监测由于气候条件变化和热带生态系统中人类活动引起的森林砍伐所引起的年内和年际物候变化和森林退化是必需的。

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  • 来源
    《International journal of remote sensing》 |2014年第24期|7910-7926|共17页
  • 作者

    Nagai Shin; Ishii Reiichiro; Bin Suhaili Affendi; Kobayashi Hideki; Matsuoka Masayuki; Ichie Tomoaki; Motohka Takeshi; Kendawang Joseph Jawa; Suzuki Rikie;

  • 作者单位

    Japan Agcy Marine Earth Sci & Technol JAMSTEC, Dept Environm Geochem Cycle Res, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC, Dept Environm Geochem Cycle Res, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan;

    Forest Dept Sarawak, Kuching 93660, Sarawak, Malaysia;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC, Dept Environm Geochem Cycle Res, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan;

    Kochi Univ, Fac Agr, Nankoku, Kochi 7838502, Japan|Kochi Univ, Agr Sci Programme, Nankoku, Kochi 7838502, Japan;

    Kochi Univ, Fac Agr, Nankoku, Kochi 7838502, Japan|Kochi Univ, Agr Sci Programme, Nankoku, Kochi 7838502, Japan;

    Japan Aerosp Explorat Agcy JAXA, Earth Observat Res Ctr, Tsukuba, Ibaraki 3058505, Japan;

    Forest Dept Sarawak, Kuching 93660, Sarawak, Malaysia;

    Japan Agcy Marine Earth Sci & Technol JAMSTEC, Dept Environm Geochem Cycle Res, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
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