Jovial Monk wrote on Sep 9
th, 2025 at 10:28am:
Just at a nice time we have a column discussing whether raw data not adjusted data would show less warming. It shows more.
The column discusses a lot of changes over time: at sea changing from buckets of sea water being hauled up and the temperature of the sea level water being taken, to changes in land like time of observation and mercury thermometers being changed for electronic thermistor types.
A good, fairly detailed description easy to read.
BTW—raw data show MORE warming!
https://www.theclimatebrink.com/p/the-raw-temperature-deal So from the linked paper -
"Reality is more mundane: we’ve changed the way we’ve measured temperatures a number of times over the past 250 years, scientists are trying to account for these changes, and the corrections we make to the record only have a modest impact on global temperatures."
HMM, trying to account over different systems. That can only mean thet don't know, otherwise it would be "have accounted for". Of course we don't know the accuracy of all those early temperature instruments, handmade, each with their own biases.
"Let's dive into how ocean temperature measurements have changed over time as an example. Prior to the early-to-mid 1900s, sailors used to toss buckets over the side of wooden ships, pull those buckets up, and stick a thermometer in to measure sea surface temperature. But it turns out that evaporation cools water as the bucket is being pulled up, so the deck height of the ship and whether the bucket was made of wood or canvas could change the resulting temperature measurements by a few tenths of a degree C."
Actually it is woese than that. The SST is a few mm thick, how did a sailor know when the bucket got to the correct depth?
"Once wooden ships with sails were replaced by modern vessels, temperature measurements were taken in the engine room intakes (where water is pulled in to cool the engine). These were more accurate than bucket-based measurements but – engine rooms being warm – tended to be slightly warmer than actual sea surface temperatures. In recent decades, ship-based measurements have largely been replaced by autonomous buoys that float around the ocean taking measurements, and send their data up to satellites."
The first part is true, the second about satellites not so much. The accuracy of the senso=rs is about 2.5C, good enough for government work. Multiple readings will still have the same inaccuracies +/-, you can't average them out.
"If you ignore changes in instrumentation and just slap everything together into a single record, you end up with a biased result: spurious warming when we switched from buckets to ship engine room measurements in the mid-20th century, and spurious cooling over the last few decades as we transitioned to buoy measurements. It's easy to prove this, as records from just one type of instrument show broad agreement with each other (and other independent data from satellites or Argo floats)"
Broad agreement doesn't give certainty and the ARGO floats only came into being about 1998, they are floating - so they are not measuring the same water, they measure in degrees C, and yet the likes of Zeke then do a lot of computation to get to zettajoules, which is only a small fraction of One degree C.
"A shift from liquid in glass thermometers to electronic thermistors in the 1980s-2000s introduced a cooling bias of about 0.5C in max temperature readings due differences in instrumentation that shows up clearly in side-by-side comparisons, as well as a slight warming bias (~0.1C to 0.2C) in minimum temperatures likely associated with a move closer to buildings in some cases for power hookups."
Not quite true. The electronic thermistors have a much faster response time than liquid-in-glass. They try to overcome that by dampening the readings and according to the WMO handbook should only be read a limited number of times per minute. Of course, many of these at airports are located near taxiways etc. And people who have walked across the tarmac to or from the terminal can attest to the warmth of a turning jet hundreds of metres away.
"One of the most effective ways that researchers have used to detect and correct for biases in land stations (which, unlike ocean records, have the advantage of being stationary) is through neighbor comparisons."
Sometimes up to 100's of kilometres away. And anybody who has driven in Australia can attest to the differing temperatures much closer than that. But again good enough for government work.
Well I am going to call it quits there, there are too many uncertainties to believe this tripe.