DOI: 10.1016/j.jag.2017.08.011
Scopus记录号: 2-s2.0-85032223721
论文题名: Remotely sensed MODIS wetland components for assessing the variability of methane emissions in Indian tropical/subtropical wetlands
作者: Bansal S ; , Katyal D ; , Saluja R ; , Chakraborty M ; , Garg J ; K
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 156
结束页码: 170
语种: 英语
英文关键词: Global warming
; Methane flux
; MODIS
; Remote sensing and GIS
; Temperature factor
; Wetlands
Scopus关键词: GIS
; global warming
; methane
; MODIS
; remote sensing
; seasonal variation
; subtropical region
; temperature effect
; tropical region
; wetland
; India
; Uttar Pradesh
英文摘要: Temperature and area fluctuations in wetlands greatly influence its various physico-chemical characteristics, nutrients dynamic, rates of biomass generation and decomposition, floral and faunal composition which in turn influence methane (CH4) emission rates. In view of this, the present study attempts to up-scale point CH4 flux from the wetlands of Uttar Pradesh (UP) by modifying two-factor empirical process based CH4 emission model for tropical wetlands by incorporating MODIS derived wetland components viz. wetland areal extent and corresponding temperature factors (Ft). This study further focuses on the utility of remotely sensed temperature response of CH4 emission in terms of Ft. Ft is generated using MODIS land surface temperature products and provides an important semi-empirical input for up-scaling CH4 emissions in wetlands. Results reveal that annual mean Ft values for UP wetlands vary from 0.69 (2010–2011) to 0.71(2011–2012). The total estimated area-wise CH4 emissions from the wetlands of UP varies from 66.47 Gg yr−1with wetland areal extent and Ft value of 2564.04 km2 and 0.69 respectively in 2010–2011 to 88.39 Gg yr−1with wetland areal extent and Ft value of 2720.16 km2 and 0.71 respectively in 2011–2012. Temporal analysis of estimated CH4 emissions showed that in monsoon season estimated CH4 emissions are more sensitive to wetland areal extent while in summer season sensitivity of estimated CH4 emissions is chiefly controlled by augmented methanogenic activities at high wetland surface temperatures. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79901
Appears in Collections: 气候变化事实与影响
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作者单位: University School of Environment Management, Guru Gobind Singh Indraprastha University, Delhi, India; Institute of Agricultural Sciences, Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
Recommended Citation:
Bansal S,, Katyal D,, Saluja R,et al. Remotely sensed MODIS wetland components for assessing the variability of methane emissions in Indian tropical/subtropical wetlands[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64