chubbs

Another issue: the shelters 100 years ago were not aspirated. Inadequate or poorly sited shelter ran warm. With his number of days metric easy for one or two sites with bad data to bias the result. We saw that in the Chester county, where spuriously warm data from Phoenixville in the 1930s and 1940s biased the >95F day data, by providing the overwhelming majority of the County 95F+ days in that period. Better to show the data for every station like chart below. That way a few bad apples don't skew the data. Threadx cities plotted below have the longest climate records.

Solar uptake continued to accelerate in Africa in the last month before the energy crisis.

Yes, here's a good example of cherry picking. Do you have any specific technical complaints? I'll be adding other stations; but, why would the results change?. The other stations all have much shorter record lengths. Plus the modern stations are all warming rapidly in complete agreement with the Coatesville and Phoenixville data.

a Here's another perspective on the oiSST data which shows the similarity to 2023. The last data point is March to date.

OK I took an initial stab at consolidating the data using Chester County's 3 long-term COOP stations. My consolidation doesn't look at all like your "analytics". Why? I only use periods without major station moves: 1949-2025 for Coatesville and Phoenixville and 1894-1969 for West Chester. I also use the 1949-1969 overlap period to take out the temperature difference between the 3 stations. While it doesn't look like your "analytics", my consolidation is a good match to the data collected at individual Chester County stations, posted above. That's gives my confidence in this approach and I plan to extend this method to the rest of the data.

Daily oisst has moved into record territory, continuing to track 2023; but 0.1 - 0.2C warmer. It is likely that SST will continue to set daily records until the developing nino fades sometime in 2027.

Reposting some of the charts I posted previously. Your line doesn't look anything like the raw data from individual stations. There is no significant difference in warming between individual Chester County stations and the Philadelphia Airport. Of course cooling station moves should be excluded. That's why the West Chester plot ends in 1969. Per the table below, there are big changes in the Chester County station population that you aren't accounting for. In comparison, the Philadelphia airport heat island is mature and isn't changing much from decade to decade. If heat island is important, why ignore the movement of Chester County stations out of towns after World War II?

I should have been clearer. The chart I posted is the ranking of the number of days over 80, with #1 being the highest. Below is the number of 80+ days on which the ranking is based.

Days hitting 80F, month to date.

Thanks for updating, what I posted must have caught the database at a bad time.

As explained in detail at the link below. Pielke's results have nothing to do with natural disasters. Instead they are an artifact of his analysis method. When the same database is analyzed properly. US disaster costs are increasing as percent of GDP and the number of disasters is increasing. https://www.econstor.eu/bitstream/10419/334359/1/20251026_fix_roger_pielke_jr.pdf

That's what we have seen so far this month, CONUS-wide warmth.

Here's a climate first. The Colorado snowpack is gone 15 days before the typical peak.

Animation showing the records tied or broken in the past 24-hours. Pink are March records.

A couple of points to add to Don's. The absorption bands of CO2 and H2O are different. There's overlap in some regions, but CO2 also absorbs in regions where H2O doesn't. More importantly H20 has a much higher boiling point than CO2 and is a liquid at atmospheric temperatures while CO2 is a gas. Because of the higher boiling point, the amount of H2O in the atmosphere is controlled by temperature. As Don points out, CO2 is more important relative to H2O in the upper atmosphere where heat is radiated to space and it is too cold to hold much water vapor. Per paper below, CO2 is the earth's thermostat. CO2 controls the amount of H2O in the atmosphere. If there was less CO2 there would be less water vapor and vice versa. As the paper states: Without the radiative forcing supplied by CO2 and the other noncondensing greenhouse gases, the terrestrial greenhouse would collapse, plunging the global climate into an icebound Earth state. https://www.science.org/doi/10.1126/science.1190653