气候变化领域集成服务门户(CCPortal): Spatiotemporal assessment of land use/land cover change and associated carbon emissions and uptake in the Mekong River Basin

CCPortal

DOI	10.1016/j.rse.2021.112336
	Spatiotemporal assessment of land use/land cover change and associated carbon emissions and uptake in the Mekong River Basin
	Tang X.; Woodcock C.E.; Olofsson P.; Hutyra L.R.
发表日期	2021
ISSN	00344257
卷号	256
英文摘要	Land use and land cover (LULC) change caused by human activities is a major source of anthropogenic carbon emissions and a driver of climate change. The Mekong Region is highly dynamic, experiencing extensive LULC change in recent decades. This study provides a spatially and temporally continuous estimate of LULC change for the Mekong River Basin for 2001–2019 using time series analysis of MODIS data coupled with a spatiotemporal carbon bookkeeping model to track carbon losses and recovery. The LULC change product has an overall accuracy of 74.4 ± 1.9% (82.1 ± 1.7% after consolidating tree-dominated classes), including an increase of 5.6% after combining with existing MODIS products (referred to as the M-CCDC process). Two of the largest components of LULC change in the region are the establishment of plantations and agricultural expansion, which were estimated to be 33,617 ± 7342 km2 and 14,915 ± 4682 km2 between 2003 and 2014. We found that 82% of the deforested area was converted to tree plantations. Among all the newly added plantations, 86% replaced natural forests and 12% replaced agricultural land. In addition, existing maps of annual tree canopy cover (TCC) were used to assess forest disturbances that do not result in LULC conversions. The M-CCDC results combined with the forest disturbances derived from TCC maps were coupled to a spatiotemporal carbon bookkeeping model to estimate carbon emissions and uptake. Carbon emissions were 72.9 ± 6.2 Tg C yr−1 during 2001–2017; emissions increase to 102.8 ± 8.6 Tg C yr−1 if including carbon not yet released to the atmosphere in the form of decomposing slash and wood products. Carbon uptake for the same period was −35.5 ± 4.9 Tg C yr−1, with carbon uptake from new plantations offsetting almost half of the emissions from deforestation in this area. Assessment of post-deforestation land use is crucial for quantifying the short- and longer- term carbon consequences of LULC change. © 2021 Elsevier Inc.
英文关键词	Carbon emission; CCDC; Mekong; MODIS; Southeast Asia; Time series
语种	英语
scopus关键词	Agricultural robots; Climate change; Deforestation; Land use; Radiometers; Time series analysis; Watersheds; Agricultural expansion; Anthropogenic carbon; Forest disturbances; Land use and land cover; Land use/land cover change; Mekong river basins; Overall accuracies; Tree canopy covers; Carbon; agricultural land; carbon emission; climate change; land cover; land use change; MODIS; nutrient uptake; plantation; satellite altimetry; spatiotemporal analysis; Mekong Basin
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178925
作者单位	Department of Earth & Environment, Boston University, 685 Commonwealth Avenue, Boston, MA 02215, United States
推荐引用方式 GB/T 7714	Tang X.,Woodcock C.E.,Olofsson P.,et al. Spatiotemporal assessment of land use/land cover change and associated carbon emissions and uptake in the Mekong River Basin[J],2021,256.
APA	Tang X.,Woodcock C.E.,Olofsson P.,&Hutyra L.R..(2021).Spatiotemporal assessment of land use/land cover change and associated carbon emissions and uptake in the Mekong River Basin.Remote Sensing of Environment,256.
MLA	Tang X.,et al."Spatiotemporal assessment of land use/land cover change and associated carbon emissions and uptake in the Mekong River Basin".Remote Sensing of Environment 256(2021).