Timescale dependence of environmental controls on methane efflux from Poyang Hu, China
Liu, LX; Xu, M; Li, RQ; Shao, R
2017
Source PublicationBIOGEOSCIENCES
ISSN1726-4170
Volume14Issue:8Pages:-
AbstractLakes are an important natural source of CH4 to the atmosphere. However, the multi-seasonal CH4 efflux from lakes has been rarely studied. In this study, the C(H)4 efflux from Poyang Hu, the largest freshwater lake in China, was measured monthly over a 4-year period by using the floating-chamber technique. The mean annual CH4 efflux throughout the 4 years was 0.54 mmol m(-2) day(-1), ranging from 0.47 to 0.60 mmol m(-2) day(-1). The CH4 efflux had a high seasonal variation with an average summer (June to August) efflux of 1.34 mmol m(-2) day(-1) and winter (December to February) efflux of merely 0.18 mmol m(-2) day(-1). The efflux showed no apparent diel pattern, although most of the peak effluxes appeared in the late morning, from 10: 00 to 12: 00 CST (GMT + 8). Multivariate stepwise regression on a seasonal scale showed that environmental factors, such as sediment temperature, sediment total nitrogen content, dissolved oxygen, and total phosphorus content in the water, mainly regulated the CH4 efflux. However, the CH4 efflux only showed a strong positive linear correlation with wind speed within 1 day on a bihourly scale in the multivariate regression analyses but almost no correlation with wind speed on diurnal and seasonal scales.
SubtypeJournal
Subject AreaEnvironmental Sciences & Ecology ; Geology
WOS Subject ExtendedEcology ; Geosciences, Multidisciplinary
WOS KeywordGREENHOUSE-GAS EMISSIONS ; CARBON-DIOXIDE FLUXES ; SUBTROPICAL LAKE ; BOREAL LAKES ; SHALLOW LAKE ; FRESH-WATER ; SEASONAL-VARIATIONS ; MICROBIAL PROCESSES ; TROPICAL RESERVOIR ; DISSOLVED METHANE
Indexed BySCI
Language英语
WOS IDWOS:000399608100001
PublisherCOPERNICUS GESELLSCHAFT MBH
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44071
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Liu, LX,Xu, M,Li, RQ,et al. Timescale dependence of environmental controls on methane efflux from Poyang Hu, China[J]. BIOGEOSCIENCES,2017,14(8):-.
APA Liu, LX,Xu, M,Li, RQ,&Shao, R.(2017).Timescale dependence of environmental controls on methane efflux from Poyang Hu, China.BIOGEOSCIENCES,14(8),-.
MLA Liu, LX,et al."Timescale dependence of environmental controls on methane efflux from Poyang Hu, China".BIOGEOSCIENCES 14.8(2017):-.
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