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Nitrous oxide flux estimates for south-eastern Australia

Journal Article


Abstract


  • Nitrous oxide (N2O) fluxes for south-eastern Australia have been estimated using a combination of the in situ N2O and radon (Rn) measurements made at the Cape Grim Baseline Air Pollution Station, in north-west Tasmania. The average N2O fluxes from the south-eastern mainland of Australia and from Tasmania over the nine years of record analysed (1985-1993) have been found to be 130 ± 30 kgN km-2 yr-1 and 160 ± 45 kgN km-2 yr-1 respectively. These fluxes are larger than expected and a significant dependence of the flux on rainfall is observed, with greater fluxes in the spring (October-December) and during periods of positive Southern Oscillation Index. A large flux (1,300 ± 500 kgN km-2 yr-1) from a nearby island (King Island) was also estimated from the data record, indicating a strong source, although the small size of the island means that it is not a significant source for Australia.

Publication Date


  • 1997

Citation


  • Wilson, S. R., Dick, A. L., Fraser, P. J., & Whittlestone, S. (1997). Nitrous oxide flux estimates for south-eastern Australia. Journal of Atmospheric Chemistry, 26(2), 169-188. doi:10.1023/A:1005828617711

Scopus Eid


  • 2-s2.0-0030619738

Start Page


  • 169

End Page


  • 188

Volume


  • 26

Issue


  • 2

Abstract


  • Nitrous oxide (N2O) fluxes for south-eastern Australia have been estimated using a combination of the in situ N2O and radon (Rn) measurements made at the Cape Grim Baseline Air Pollution Station, in north-west Tasmania. The average N2O fluxes from the south-eastern mainland of Australia and from Tasmania over the nine years of record analysed (1985-1993) have been found to be 130 ± 30 kgN km-2 yr-1 and 160 ± 45 kgN km-2 yr-1 respectively. These fluxes are larger than expected and a significant dependence of the flux on rainfall is observed, with greater fluxes in the spring (October-December) and during periods of positive Southern Oscillation Index. A large flux (1,300 ± 500 kgN km-2 yr-1) from a nearby island (King Island) was also estimated from the data record, indicating a strong source, although the small size of the island means that it is not a significant source for Australia.

Publication Date


  • 1997

Citation


  • Wilson, S. R., Dick, A. L., Fraser, P. J., & Whittlestone, S. (1997). Nitrous oxide flux estimates for south-eastern Australia. Journal of Atmospheric Chemistry, 26(2), 169-188. doi:10.1023/A:1005828617711

Scopus Eid


  • 2-s2.0-0030619738

Start Page


  • 169

End Page


  • 188

Volume


  • 26

Issue


  • 2