DOI: 10.1038/s41561-020-0575-4
论文题名: Widespread subsidence and carbon emissions across Southeast Asian peatlands
作者: Hoyt A.M. ; Chaussard E. ; Seppalainen S.S. ; Harvey C.F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 6 起始页码: 435
结束页码: 440
语种: 英语
英文关键词: carbon emission
; Intergovernmental Panel on Climate Change
; peatland
; remote sensing
; spatial resolution
; subsidence
; synthetic aperture radar
; water table
; Southeast Asia
英文摘要: Over the last three decades, most of the 25 million hectares of tropical peatlands in Southeast Asia have been deforested and drained. As a consequence, declining water tables are exposing peat to oxidation, converting plant material accumulated over millennia to carbon dioxide, and causing land subsidence. Here, we quantify the widespread peat carbon loss by using InSAR remote sensing to map subsidence at 90-m resolution across 2.7 Mha of peatland area from 2007 to 2011. Over 90% of the surveyed area is subsiding, with a mean rate of 2.2 cm yr−1. Consequently, the region now faces loss of productive land and flooding because many peatlands are near sea level. Our measurements reveal that smallholder agricultural areas and degraded peatlands are subsiding at rates comparable to those of plantations, and that subsidence rates increase away from rivers and decrease over time following drainage. Because of its detailed spatial resolution, InSAR provides a valuable tool to identify emissions by land use and geography and to target hotspots for better management. Finally, we use remotely sensed maps to update IPCC emissions factors and calculate regional CO2 emissions from peat oxidation of 155 ± 30 MtC yr−1 in 2015, similar in magnitude to both regional fossil-fuel emissions and peat fires. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169618
Appears in Collections: 气候变化与战略
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作者单位: Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Center for Environmental Sensing and Modeling, Singapore–MIT Alliance for Research and Technology, Singapore, Singapore; Max Planck Institute for Biogeochemistry, Jena, Germany
Recommended Citation:
Hoyt A.M.,Chaussard E.,Seppalainen S.S.,et al. Widespread subsidence and carbon emissions across Southeast Asian peatlands[J]. Nature Geoscience,2020-01-01,13(6)