Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-020-0575-4 |
Widespread subsidence and carbon emissions across Southeast Asian peatlands | |
Hoyt, Alison M.1,4; Chaussard, Estelle2; Seppalainen, Sandra S.1; Harvey, Charles F.1,3 | |
2020-06-04 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:6页码:435-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Singapore; Germany |
英文摘要 | Subsidence and carbon emissions in tropical peatlands are primarily linked to drainage history, not land-use type, according to large-scale high-resolution remote sensing in Southeast Asia. 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. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537994800002 |
WOS关键词 | TROPICAL PEATLANDS ; PEAT SUBSIDENCE ; CO2 EMISSIONS ; DEFORMATION ; INDONESIA ; INSAR ; ACCUMULATION ; KALIMANTAN ; PLANTATION ; SUMATRA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/273340 |
专题 | 地球科学 气候变化 |
作者单位 | 1.MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 2.Univ Oregon, Dept Earth Sci, Eugene, OR 97403 USA; 3.Singapore MIT Alliance Res & Technol, Ctr Environm Sensing & Modeling, Singapore, Singapore; 4.Max Planck Inst Biogeochem, Jena, Germany |
推荐引用方式 GB/T 7714 | Hoyt, Alison M.,Chaussard, Estelle,Seppalainen, Sandra S.,et al. Widespread subsidence and carbon emissions across Southeast Asian peatlands[J]. NATURE GEOSCIENCE,2020,13(6):435-+. |
APA | Hoyt, Alison M.,Chaussard, Estelle,Seppalainen, Sandra S.,&Harvey, Charles F..(2020).Widespread subsidence and carbon emissions across Southeast Asian peatlands.NATURE GEOSCIENCE,13(6),435-+. |
MLA | Hoyt, Alison M.,et al."Widespread subsidence and carbon emissions across Southeast Asian peatlands".NATURE GEOSCIENCE 13.6(2020):435-+. |
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