Brisbane CO2 for 27 December 2023

Please see here for details about the calibration improvements made since Phase 2. Relatively high values overnight, especially at Chapel Hill (touching 500 ppm) and Bellbird Park (exceeding 540 ppm) with substantially similar daylight patterns and levels across sites.  Today’s second chart shows Sydney and Melbourne included in a larger study of emissions trends between 2000 and 2018.  Both Australian cities are allocated to “Cluster 3” – those cities whose per capita emissions are growing, though behind many (mostly Asian) cities with large absoloute and per capita emissions growth or growth in city area emissions. The reported annual growth rates for Sydney were total emissions 3%, per capita emissions: 1.8%, and for Melbourne, 2.2% (total emissions) and 1.1% (per capita emissions).

Daily Averages – Phase 3

For reference, latest monthly average (August 2023) from CSIRO for Kennaook/Cape Grim in NW Tasmania was 417.1 ppm. (Note – these are provisional values, subject to revision folllowing sensor re-calibrations and other checks.)

Daily Averages – Phase 2 (See explanation of differences between Phase 1 and Phase 2 data)

For reference, latest monthly average (July 2023) from CSIRO for Kennaook/Cape Grim in NW Tasmania was 416.6 ppm. (Note – these are provisional values, subject to revision folllowing sensor re-calibrations and other checks.)