期刊
INTERNATIONAL JOURNAL OF DIGITAL EARTH
卷 14, 期 1, 页码 106-120出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17538947.2020.1794064
关键词
Leaf area index; leaf; canopy chlorophyll content; radiative transfer model; look-up table; machine learning algorithms
The study compared the use of radiative transfer model inversion and machine learning algorithms to predict plant traits in a forest, showing that machine learning methods had similar accuracy and robustness to the radiative transfer model inversion.
Assessment of vegetation biochemical and biophysical variables is useful when developing indicators for biodiversity monitoring and climate change studies. Here, we compared a radiative transfer model (RTM) inversion by merit function and five machine learning algorithms trained on an RTM simulated dataset predicting the three plant traits leaf chlorophyll content (LCC), canopy chlorophyll content (CCC), and leaf area index (LAI), in a mixed temperate forest. The accuracy of the retrieval methods in predicting these three plant traits with spectral data from Sentinel-2 acquired on 13 July 2017 over Bavarian Forest National Park, Germany, was evaluated usingin situmeasurements collected contemporaneously. The RTM inversion using merit function resulted in estimations of LCC (R-2 = 0.26, RMSE = 3.9 mu g/cm(2)), CCC (R-2 = 0.65, RMSE = 0.33 g/m(2)), and LAI (R-2 = 0.47, RMSE = 0.73 m(2)/m(2)), comparable to the estimations based on the machine learning method Random forest regression of LCC (R-2 = 0.34, RMSE = 4.06 mu g/cm(2)), CCC (R-2 = 0.65, RMSE = 0.34 g/m(2)), and LAI (R-2 = 0.47, RMSE = 0.75 m(2)/m(2)). Several of the machine learning algorithms also yielded accuracies and robustness similar to the RTM inversion using merit function. The performance of regression methods trained on synthetic datasets showed promise for fast and accurate mapping of plant traits accross different plant functional types from remote sensing data.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据