Musenze, Ronald; Ursula, Werner; Grinham, Alistair; Udy, James; Yuan, Zhiguo (2015): Methane and nitrous oxide emissions and continuous meteorological observations from a subtropical coastal embayment (Moreton Bay, Australia) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.832905, Supplement to: Musenze, Ronald; Werner, Ursula; Grinham, Alistair; Udy, James; Yuan, Zhiguo (2015): Methane and nitrous oxide emissions from a subtropical coastal embayment (Moreton Bay, Australia). Journal of Environmental Sciences, 29, 82-96, https://doi.org/10.1016/j.jes.2014.06.049
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Abstract:
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/m**2/day while N2O varied between 0.4±0.1 and 1.6±0.6 mg N2O/m**2/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.
Coverage:
Median Latitude: -27.214802 * Median Longitude: 153.089195 * South-bound Latitude: -27.285000 * West-bound Longitude: 153.073700 * North-bound Latitude: -27.160000 * East-bound Longitude: 153.092200
Date/Time Start: 2010-01-01T00:00:00 * Date/Time End: 2012-03-29T07:30:00
Comment:
Methane and nitrous oxide concentrations and fluxes in Bramble Bay and Deception Bay (Moreton Bay, Southeast Queensland, Australia) together with the wind and current data used to estimate the fluxes as well other metadata.
This dataset covers a period of 2.5 years from 2010 - 2012. Methane and nitrous oxide were measured in the two bays during 7 different seasons. The Fluxes were estimated using combinations of 10 wind and current based models. Wind was measured continuously from a Jetty by the Bureau of Meteorology while current velocity at the different monitoring stations were estimated using the CSIRO RWQM V3 to a near real time precision.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Musenze, R; Ursula, W; Grinham, A et al. (2015): Continuous meteorological observations at Redcliff station, Moreton Bay, Australia, in 2010. https://doi.org/10.1594/PANGAEA.832827
- Musenze, R; Ursula, W; Grinham, A et al. (2015): Continuous meteorological observations at Redcliff station, Moreton Bay, Australia, in 2011. https://doi.org/10.1594/PANGAEA.832826
- Musenze, R; Ursula, W; Grinham, A et al. (2015): Continuous meteorological observations at Redcliff station, Moreton Bay, Australia, in 2012. https://doi.org/10.1594/PANGAEA.832824
- Musenze, R; Ursula, W; Grinham, A et al. (2015): Methane and nitrous oxide emissions from a subtropical coastal embayment (Moreton Bay, Australia), links to supplementary material. https://doi.org/10.1594/PANGAEA.832904