Brisbane CO2 for 27 June 2023

Travels interrupted posting for the last few days, but with time to carefully check all Python analysis code, the averages for the last 19 days are presented here without resorting to Excel.  The tabulated data receives a minor revision between June 09 and June 18 (data for June 19 and subsequent dates is new today.  The checks caught an inadvertent double application of calibration coefficients – making a very small difference to some data, in no case > 2ppm). Phase 2 data (see explanation here) has accumulated to the point where the average values in Fig 2 show a fairly clear pattern.  The CBD concentrations are marginally higher than the others overall, but are notably higher in daylight hours, while the city edge data (Bellbird Park) has higher values at night, possibly because of higher night-time respiration from vegetation.  The final image is of a meeting I had with final year PhD student Naomi Askow at U.C. Berkeley – Naomi is on Prof. Ron Cohen’s ‘Beaco2n’ project team – and generously shared some of her time explaining aspects of their more established project.  On display is their sensor equipment which is the basis for their extensive Bay Area network. Many useful ideas came from this meeting.

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
27-Jun-2023426 ppm409 ppm415 ppm
26-Jun-2023412 ppm402 ppm412 ppm
25-Jun-2023447 ppm426 ppm429 ppm
24-Jun-2023427 ppm417 ppm423 ppm
23-Jun-2023434 ppm427 ppm435 ppm
22-Jun-2023442 ppm425 ppm436 ppm
21-Jun-2023443 ppm421 ppm437 ppm
20-Jun-2023421 ppm414 ppm417 ppm
19-Jun-2023430 ppm418 ppm419 ppm
18-Jun-2023436 ppm426 ppm434 ppm
17-Jun-2023440 ppm429 ppm437 ppm
16-Jun-2023438 ppm421 ppm433 ppm
15-Jun-2023433 ppm412 ppm428 ppm
14-Jun-2023435 ppm425 ppm438 ppm
13-Jun-2023441 ppm436 ppm442 ppm
12-Jun-2023442 ppm439 ppm448ppm
11-Jun-2023443 ppm441 ppm451 ppm
10-Jun-2023446 ppm432 ppm4444 ppm
9-Jun-2023441 ppm428 ppm440ppm
CO2 concentrations for Phase 2
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