Brisbane CO2 for 13 December 2023

Please see here for details about the calibration improvements made since Phase 2.  Wednesday’s patterns were quite similar to Tuesday’s – including the later night-time increase at Petrie Terrace and Bellbird Park’s pronounced midday rise.  Today’s second chart is another study from China.  The authors compared column-averaged CO2 levels from GOSAT and OCO-2 satellite measures from 2010 to 2019 with either the rate of urbanisation or the ratio of impervious area to urban green area. Both comparisons showed generally high correlations. However, this does not indicate a causal relationship – Wuhan increased its green space over that decade and its ratio of impervious to urban green area dropped.  This did not stop its air having the same growth in CO2 as the other cities.  The results really just show that urbanisation generally increased and CO2 rose irrespective of the proportion of impervious area.

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.)