DOI: 10.1002/2015GL063126
论文题名: Nitrous oxide and methane dynamics in a coral reef lagoon driven by pore water exchange: Insights from automated high-frequency observations
作者: O'Reilly C. ; Santos I.R. ; Cyronak T. ; McMahon A. ; Maher D.T.
刊名: Geophysical Research Letters
ISSN: 0094-8741
EISSN: 1944-8472
出版年: 2015
卷: 42, 期: 8 起始页码: 2885
结束页码: 2892
语种: 英语
英文关键词: coral reef
; methane
; nitrous oxide
; radon
; submarine groundwater discharge
Scopus关键词: Carbon dioxide
; Discharge (fluid mechanics)
; Gas dynamics
; Greenhouse gases
; Groundwater
; Lakes
; Light measurement
; Methane
; Nitrogen oxides
; Oxic sediments
; Radon
; Spectroscopy
; Water
; Cavity ring down spectroscopies
; Continuous measurements
; Coral reef
; Groundwater exchanges
; Nitrification-denitrification
; Nitrous oxide
; Pore water exchange
; Submarine groundwater discharge
; Reefs
; coral reef
; greenhouse gas
; lagoon
; marine sediment
; methane
; nitrous oxide
; oxic sediment
; porewater
; water exchange
; Anthozoa
; Aves
英文摘要: Automated cavity ring down spectroscopy was used to make continuous measurements of dissolved methane, nitrous oxide, and carbon dioxide in a coral reef lagoon for 2 weeks (Heron Island, Great Barrier Reef). Radon (222Rn) was used to trace the influence of tidally driven pore water exchange on greenhouse gas dynamics. Clear tidal variation was observed for CH4, which correlated to 222Rn in lagoon waters. N2O correlated to 222Rn during the day only, which appears to be a response to coupled nitrification-denitrification in oxic sediments, fueled by nitrate derived from bird guano. The lagoon was a net source of CH4 and N2O to the atmosphere and a sink for atmospheric CO2. The estimated pore water-derived CH4 and N2O fluxes were 3.2-fold and 24.0-fold greater than the fluxes to the atmosphere. Overall, pore water and/or groundwater exchange were the only important sources of CH4 and major controls of N2O in the coral reef lagoon. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929502345&doi=10.1002%2f2015GL063126&partnerID=40&md5=aa6b0f62ac916bb6c138762a6f7e2949
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8357
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, Coffs Harbour, NSW, Australia
Recommended Citation:
O'Reilly C.,Santos I.R.,Cyronak T.,et al. Nitrous oxide and methane dynamics in a coral reef lagoon driven by pore water exchange: Insights from automated high-frequency observations[J]. Geophysical Research Letters,2015-01-01,42(8).