Carbon dioxide concentrations rose across the day on Thursday. They were marginally lower on average than Wednesday, but averaging 431 ppm for the day, are slightly above the overall average for Phase 2 data since 9 June. Globally, Wednesday (12 July) was the tenth consecutive day of temperatures greater than the previous highest single day value in the 45 year record of the NCEP Climate Forecast System (CFS) version 2 analyzed by the University of Maine, and a widely accepted estimator of global temperatures based on large numbers of inputs. Today’s third chart (for the northern hemisphere summers up to 2020) shows how the distribution of temperature anomalies (differences from the 1951-1980 period) have shifted, with over one fifth of observations between 3 and 6 standard deviations above the mean for that period.
Daily Averages – Phase 2 (See explanation of differences between Phase 1 and Phase 2 data)
For reference, latest monthly average (May 2023) from CSIRO for Kennaook/Cape Grim in NW Tasmania was 415.7 ppm. (Note – these are provisional values, subject to revision folllowing sensor re-calibrations and other checks.)
Date | Petrie Terrace | Chapel Hill | Bellbird Park |
13-Jul-2023 | 433 ppm | 431 ppm | 429 ppm |
12-Jul-2023 | 437 ppm | 437 ppm | 438 ppm |
11-Jul-2023 | 448 ppm | 434 ppm | 438 ppm |
10-Jul-2023 | 439 ppm | 424 ppm | 432 ppm |
9-Jul-2023 | 423 ppm | 411 ppm | 417 ppm |
8-Jul-2023 | 418 ppm | 411 ppm | 414 ppm |
7-Jul-2023 | 413 ppm | 407 ppm | 408 ppm |
6-Jul-2023 | 434 ppm | 427 ppm | 428 ppm |
5-Jul-2023 | 442 ppm | 441 ppm | 429 ppm |
4-Jul-2023 | 449 ppm | 443 ppm | 429 ppm |
3-Jul-2023 | 428 ppm | 429 ppm | 412 ppm |
2-Jul-2023 | 424 ppm | 425 ppm | 414 ppm |
1-Jul-2023 | 419 ppm | 407 ppm | 405 ppm |
30-Jun-2023 | 414 ppm | 405 ppm | 402 ppm |
29-Jun-2023 | 415 ppm | 409 ppm | 405 ppm |
28-Jun-2023 | 435 ppm | 427 ppm | 428 ppm |
27-Jun-2023 | 426 ppm | 409 ppm | 415 ppm |
26-Jun-2023 | 412 ppm | 402 ppm | 412 ppm |
25-Jun-2023 | 447 ppm | 426 ppm | 429 ppm |
24-Jun-2023 | 427 ppm | 417 ppm | 423 ppm |
23-Jun-2023 | 434 ppm | 427 ppm | 435 ppm |
22-Jun-2023 | 442 ppm | 425 ppm | 436 ppm |
21-Jun-2023 | 443 ppm | 421 ppm | 437 ppm |
20-Jun-2023 | 421 ppm | 414 ppm | 417 ppm |
19-Jun-2023 | 430 ppm | 418 ppm | 419 ppm |
18-Jun-2023 | 436 ppm | 426 ppm | 434 ppm |
17-Jun-2023 | 440 ppm | 429 ppm | 437 ppm |
16-Jun-2023 | 438 ppm | 421 ppm | 433 ppm |
15-Jun-2023 | 433 ppm | 412 ppm | 428 ppm |
14-Jun-2023 | 435 ppm | 425 ppm | 438 ppm |
13-Jun-2023 | 441 ppm | 436 ppm | 442 ppm |
12-Jun-2023 | 442 ppm | 439 ppm | 448ppm |
11-Jun-2023 | 443 ppm | 441 ppm | 451 ppm |
10-Jun-2023 | 446 ppm | 432 ppm | 444 ppm |
9-Jun-2023 | 441 ppm | 428 ppm | 440ppm |