Daily chart answer for Tuesday, October 6, 2026
How did monthly CO₂ at Mauna Loa change from 2004 to 2006 (ppm)? Climate · 36 observations · NOAA Global Monitoring Laboratory.
Solid line = the part players could see · dashed violet = the daily chart’s hidden stretch, revealed here.
What happened
After the visible part ended on Mar 2005, it pushed higher 0.3% to finish at 382.02 ppm. Players saw the first 15 of 36 observations before drawing. From 377.17 ppm to 382.02 ppm, the full span nets out up 1.3%. The period high of 385.22 ppm came in May 2006; the low of 374.43 ppm, in Sep 2004. The biggest one-step move was a 0.6% downward in Jul 2004. Data: NOAA Global Monitoring Laboratory.
The hidden values
After the cutoff (Mar 2005), the series printed:
| Date | Actual value |
|---|---|
| Apr 2005 | 382.48 |
| May 2005 | 382.64 |
| Jun 2005 | 382.4 |
| Jul 2005 | 380.93 |
| Aug 2005 | 378.93 |
| Sep 2005 | 376.89 |
| Oct 2005 | 377.19 |
| Nov 2005 | 378.54 |
| Dec 2005 | 380.31 |
| Jan 2006 | 381.58 |
| Feb 2006 | 382.4 |
| Mar 2006 | 382.86 |
| Apr 2006 | 384.8 |
| May 2006 | 385.22 |
| Jun 2006 | 384.24 |
| Jul 2006 | 382.65 |
| Aug 2006 | 380.6 |
| Sep 2006 | 379.04 |
| Oct 2006 | 379.33 |
| Nov 2006 | 380.35 |
| Dec 2006 | 382.02 |
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