Well, of course he doesn't, but he does try to explain the recent Pacific Northwest heat wave without, of course, invoking manmade climate change, which he doesn't buy, but it's a hilarious case of numerology, so let's have a laugh.
In this case, over on Ed Berry's blog Chuck pulls numbers in from all over the solar system to figure that Portland's monster hot day in 2021 of 116°F wasn't really any worse than previous high temperatures in 1965 and 1981, writing,
On August 8th, the total surface radiation is 2.0920000 x 10^7 Jm-2 and likewise, over a 14-hour solar day gives an average surface solar insolation of 415 Wm-2. The difference between these two numbers is substantial at a whopping 46 Wm-2!Even though some of these numbers are given to only one significant figure, like 8 Wm-2, Chuck somehow comes up with a temperature good to four significant figures, 117.2 F.
But this difference is mitigated some due to the elliptical orbit of the earth around the sun which between June 27th and August 8th adds an additional 8 Wm-2 of solar insolation to TOA or 6 Wm-2 to the surface at the perpendicular angle to the atmosphere. With the noon solar angle of the sun calculated at 60.49 degrees above azimuth on August 8th, that reduces those values further at Portland’s latitude to 5.2 Wm-2, with the final difference in solar radiation being 40.8 Wm-2 further reduced to 36.72 Wm-2 with a surface emissivity of .9. This is still quite substantial.
If we divide this difference into the rate of change of flux with respect to temperature of 6.45 Wm-2K-1 given above, we get a surplus temperature of 5.69 deg C or 10.2 deg F compared to the earlier heatwaves of record on July 30, 1965, and on August 8h and 10th of 1981. Add this to these old records of 107 deg F and you get 117.2 deg F. That comes within 1.2 degF of what the new all-time high-temperature record is that was just set for Portland at 116 deg F yesterday.
- differences in CO2 concentrations above Portland itself, which he assumes are just the annual difference in the global number ("What about atmospheric CO2? In 1981, the Mauna Loa CO2 level was given as 341 ppmv whereas today it is 416 ppmv."), but of course we know it's much more complicated than that, varying by time of year, day of year, hour of the day, etc. A difference far larger than his 0.01 Wm-2, and even much higher than this.
- What about the other greenhouse gases too -- methane, nitrous oxide, ozone, all the dozen other or so? Chuck says they don't matter, even 40 years later.
- Any difference in total solar irradiance, where the Sun is in its solar cycle? Not according to Chuck.
- What about pollution over Portland's temperature sensors, aerosols that can lead to cooling? Completely ignored.
- The urban heat island effect? Has it increased in the decades since the earlier records in Portland? Not according to Chuck. Or perhaps he didn't even think about it.
- Anything I haven't though of? Probably.