Methane and nitrous oxide emissions and continuous meteorological observations from a subtropical coastal embayment (Moreton Bay, Australia)

Surface water methane (CH4) and nitrous oxide (N2O) concentrations and fluxes were investigated in two subtropical coastal embayments (Bramble Bay and Deception Bay, which are part of the greater Moreton Bay, Australia). Measurements were done at 23 stations in seven campaigns covering different seasons during 2010-2012. Water-air fluxes were estimated using the Thin Boundary Layer approach with a combination of wind and currents-based models for the estimation of the gas transfer velocities. The two bays were strong sources of both CH4 and N2O with no significant differences in the degree of saturation of both gases between them during all measurement campaigns. Both CH4 and N2O concentrations had strong temporal but minimal spatial variability in both bays. During the seven seasons, CH4 varied between 500% and 4000% saturation while N2O varied between 128 and 255% in the two bays. Average seasonal CH4 fluxes for the two bays varied between 0.5±0.2 and 6.0±1.5 mg CH4/m2/day while N2O varied between 0.4±0.1 and 1.6±0.6 mg N2O/m2/day. Weighted emissions (t CO2-e) were 63%-90% N2O dominated implying that a reduction in N2O inputs and/or nitrogen availability in the bays may significantly reduce the bays' greenhouse gas (GHG) budget. Emissions data for tropical and subtropical systems is still scarce. This work found subtropical bays to be significant aquatic sources of both CH4 and N2O and puts the estimated fluxes into the global context with measurements done from other climatic regions.

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Cite this as

Musenze, Ronald, Ursula, Werner, Grinham, Alistair, Udy, James, Yuan, Zhiguo (2015). Dataset: Methane and nitrous oxide emissions and continuous meteorological observations from a subtropical coastal embayment (Moreton Bay, Australia). https://doi.org/10.1594/PANGAEA.832905

DOI retrieved: 2015

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.832905
Author Musenze, Ronald
Given Name Ronald
Family Name Musenze
More Authors
Ursula, Werner
Grinham, Alistair
Udy, James
Yuan, Zhiguo
Source Creation 2015
Publication Year 2015
Resource Type application/zip - filename: Musenze_2015
Subject Areas
Name: Ecology

Related Identifiers
Title: Methane and nitrous oxide emissions from a subtropical coastal embayment (Moreton Bay, Australia)
Identifier: https://doi.org/10.1016/j.jes.2014.06.049
Type: DOI
Relation: IsSupplementTo
Year: 2015
Source: Journal of Environmental Sciences
Authors: Musenze Ronald , Werner Ursula , Grinham Alistair , Udy James , Yuan Zhiguo .