Brisbane CO2 for 16 June 2023

A relatively low level at Chapel Hill on Thursday in Phase 2 data (see explanation here).  Today’s third graph is from Canada, this time a boreal forest rather than an urban area. Just as in Tokyo’s data (see yesterday’s post), the months of June, July and August show the biggest drops in the early afternoon, again photosynthesis effects the presumed cause, with sufficient mass of vegetation to appreciably lower CO2 levels. Higuchi, K., D. Worthy, D. Chan, and A. Shashkov. ‘Regional Source/Sink Impact on the Diurnal, Seasonal and Inter-Annual Variations in Atmospheric CO 2 at a Boreal Forest Site in Canada’. Tellus B: Chemical and Physical Meteorology 55, no. 2 (January 2003): 115–25.

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

For reference, latest monthly average (Apr 2023) from CSIRO for Kennaook/Cape Grim in NW Tasmania was 415.4 ppm. (Note – these are provisional values, subject to revision folllowing sensor re-calibrations and other checks.)

DatePetrie TerraceChapel HillBellbird Park
16-Jun-2023437 ppm423 ppm431 ppm
15-Jun-2023432 ppm413 ppm426 ppm
14-Jun-2023435 ppm427 ppm436 ppm
13-Jun-2023441 ppm438 ppm440 ppm
12-Jun-2023442 ppm441 ppm446ppm
11-Jun-2023443 ppm443 ppm449 ppm
10-Jun-2023446 ppm434 ppm442 ppm
9-Jun-2023440 ppm430 ppm438 ppm
CO2 concentrations for Phase 2
Scroll to Top