globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13689
论文题名:
An expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributor
作者: Gumbricht T.; Roman-Cuesta R.M.; Verchot L.; Herold M.; Wittmann F.; Householder E.; Herold N.; Murdiyarso D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:9
起始页码: 3581
结束页码: 3599
语种: 英语
英文关键词: climate change ; land use ; peatlands ; tropics ; wetlands
英文摘要: Wetlands are important providers of ecosystem services and key regulators of climate change. They positively contribute to global warming through their greenhouse gas emissions, and negatively through the accumulation of organic material in histosols, particularly in peatlands. Our understanding of wetlands’ services is currently constrained by limited knowledge on their distribution, extent, volume, interannual flood variability and disturbance levels. We present an expert system approach to estimate wetland and peatland areas, depths and volumes, which relies on three biophysical indices related to wetland and peat formation: (1) long-term water supply exceeding atmospheric water demand; (2) annually or seasonally water-logged soils; and (3) a geomorphological position where water is supplied and retained. Tropical and subtropical wetlands estimates reach 4.7 million km2 (Mkm2). In line with current understanding, the American continent is the major contributor (45%), and Brazil, with its Amazonian interfluvial region, contains the largest tropical wetland area (800,720 km2). Our model suggests, however, unprecedented extents and volumes of peatland in the tropics (1.7 Mkm2 and 7,268 (6,076–7,368) km3), which more than threefold current estimates. Unlike current understanding, our estimates suggest that South America and not Asia contributes the most to tropical peatland area and volume (ca. 44% for both) partly related to some yet unaccounted extended deep deposits but mainly to extended but shallow peat in the Amazon Basin. Brazil leads the peatland area and volume contribution. Asia hosts 38% of both tropical peat area and volume with Indonesia as the main regional contributor and still the holder of the deepest and most extended peat areas in the tropics. Africa hosts more peat than previously reported but climatic and topographic contexts leave it as the least peat-forming continent. Our results suggest large biases in our current understanding of the distribution, area and volumes of tropical peat and their continental contributions. © 2017 The Authors. Global Change Biology Published by John Wiley & Sons Ltd.
资助项目: The wetland mapping was partly done in cooperation with the Center for International Forestry Research (CIFOR), with support from the U.S. Agency for International Development (USAID) Grant #MTO069018. The development of global models for geomorphology and hydrology was partly done by support from the World Agroforestry Centre (ICRAF). The authors acknowledge no conflict of interest in this research.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60845
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Center for International Forestry Research (CIFOR), Bogor, Indonesia; Karttur AB, Stockholm, Sweden; Laboratory of Geo-Information Science and Remote Sensing, Wageningen University & Research, Wageningen, Netherlands; International Center for Tropical Agriculture, Cali, Colombia; Earth Institute Center for Environmental Sustainability, Columbia University, New York, NY, United States; Department of Wetland Ecology, Institute for Geography and Geoecology, Karlsruhe Institute of Technology-KIT, Rastatt, Germany; Department of Geophysics and Meteorology, Bogor Agricultural University, Bogor, Indonesia

Recommended Citation:
Gumbricht T.,Roman-Cuesta R.M.,Verchot L.,et al. An expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributor[J]. Global Change Biology,2017-01-01,23(9)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Gumbricht T.]'s Articles
[Roman-Cuesta R.M.]'s Articles
[Verchot L.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Gumbricht T.]'s Articles
[Roman-Cuesta R.M.]'s Articles
[Verchot L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Gumbricht T.]‘s Articles
[Roman-Cuesta R.M.]‘s Articles
[Verchot L.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.