Conterminous United States Land-Cover Change (1985-2016): New Insights from Annual Time Series
Conterminous United States Land-Cover Change (1985-2016): New Insights from Annual Time Series
复制标题
DOI：
10.3390/land11020298
复制
发表时间：
2022-02-01
期刊：
影响因子：
3.9
通讯作者：
Reker, Ryan R.
中科院分区：
文献类型：
--
作者：
Auch, Roger F.;Wellington, Danika F.;Reker, Ryan R.
基于样本的估计，通过完整覆盖的土地覆盖图来估计面积，并描述1985年至2016年期间美国大陆（CONUS）的年度土地覆盖变化模式。在这段时间内，美国大陆的大部分土地覆盖在净类变化方面保持稳定，但年度和累积时间间隔捕获了大量的总变化动态。主要的变化类型可分为自然资源循环、城市化的增加和地表水动态。对30年时间序列的年度估计显示，2006年后城市扩张速度下降，2007年后耕地面积出现新的增长，但自1985年以来耕地面积总体净减少，以及两个净树木覆盖损失时期，第一个时期在时间序列的早期，第二个时期从2012年开始。我们的研究提供了一个整体的评估CONUS土地覆盖转换（类）的变化，可以作为未来研究的新基准。
Sample-based estimates augmented by complete coverage land-cover maps were used to estimate area and describe patterns of annual land-cover change across the conterminous United States (CONUS) between 1985 and 2016. Most of the CONUS land cover remained stable in terms of net class change over this time, but a substantial gross change dynamic was captured by the annual and cumulative time intervals. The dominant types of changes can be grouped into natural resource cycles, increases in urbanization, and surface-water dynamics. The annual estimates over the 30-year time series showed a reduction in the rate of urban expansion after 2006, new growth in cropland after 2007, but a net overall decline in cropland since 1985, and two eras of net tree cover loss, the first one early in the time series and the second starting in 2012. Our study provides a holistic assessment of the CONUS land-cover conversion (class) change and can serve as a new benchmark for future research.