Chester County PA - Analytical Battle of Actual vs. Altered Climate Data

[forkyfork]

i don't do maybes plz show us the station

[ChescoWx]

 

A Vantage Pro 2 (VP2) weather station with a fan-aspirated radiation shield significantly improves temperature accuracy by minimizing the impact of solar radiation and other radiated heat sources on the temperature sensor. The fan draws air through the sensor chamber, reducing temperature errors and providing more reliable readings, especially in areas with low air flow.

Accuracy improvement:

This method improves accuracy by up to 1.5°C (2.7°F) in areas with low airflow, according to Instrument Ch

 

Here's a more detailed explanation:

• How it works:

  The fan-aspirated radiation shield uses a fan to continuously draw air through the sensor chamber, preventing the temperature sensor from being heated by direct sunlight or reflected heat. 

•  
• Accuracy improvement:

  This method improves accuracy by up to 1.5°C (2.7°F) in areas with low airflow, according to Instrument Choice. 
•  
• Power source:

  The fan can be solar-powered or run on batteries, depending on the specific model. 
•  
• Benefits:

  Using a fan-aspirated shield ensures more reliable temperature measurements, especially in sunny locations or areas with limited natural ventilation. 

[ChescoWx]

1 minute ago, forkyfork said:

i don't do maybes plz show us the station

https://www.davisinstruments.com/products/wireless-vantage-pro2-with-24-hour-fan-aspirated-radiation-shield-and-weatherlink-console?srsltid=AfmBOoqreXwwKT3tJn1oDiyLA18c4VSrMbFST9-Ksrm0c6r59Kk6tbem

 

[forkyfork]

right on schedule. lol

[forkyfork]

4 minutes ago, ChescoWx said:

https://www.davisinstruments.com/products/wireless-vantage-pro2-with-24-hour-fan-aspirated-radiation-shield-and-weatherlink-console?srsltid=AfmBOoqreXwwKT3tJn1oDiyLA18c4VSrMbFST9-Ksrm0c6r59Kk6tbem

 

i mean a photo of the station and its surroundings

[forkyfork]

the coldest one. hmm

[forkyfork]

it seems like this whole thread is based on faulty data. sad

[ChescoWx]

4 minutes ago, forkyfork said:

right on schedule. lol

Thank God I pay for the most expensive station that has fan aspiration to correct for solar errors of surrounding stations!!

[ChescoWx]

3 minutes ago, forkyfork said:

it seems like this whole thread is based on faulty data. sad

LOL!!!You as usual are not following forky....my backyard data has zero to do with the data in this discussion....

[ChescoWx]

19 minutes ago, forkyfork said:

i mean a photo of the station and its surroundings

NWS (National Weather Service) siting standards are intended to be consistent with the surrounding area, particularly when it comes to Cooperative Observer Program (Coop) stations. This means the site should be representative of the weather conditions experienced in that specific location. Siting guidelines aim to ensure accurate and representative weather data collection. Not that it matters as the data excludes my backyard for climate comparisons. But,, as you can tell with the satellite photo I am consistent with the surrounding terrain. Plenty of trees but not many houses.

[TimB]

5 minutes ago, ChescoWx said:

Thank God I pay for the most expensive station that has fan aspiration to correct for solar errors of surrounding stations!!

okie dokie

[ChescoWx]

Just now, TimB said:

okie dokie

We strive for accuracy!!! 

[ChescoWx]

10 minutes ago, forkyfork said:

it seems like this whole thread is based on faulty data. sad

Again my station is not part of the data set for Chester County PA!

[chubbs]

 

 

2 hours ago, forkyfork said:

it seems like this whole thread is based on faulty data. sad

The thread is based on faulty analysis not faulty data. The data is complicated with numerous station changes (see table below). If you ignore the station changes, like Chescowx does, you don't get the right answer for Chester County.

As an example, here's a comparison of the Chesco Coop average to Philadelphia (PHL) and Allentown (ABE). Between 1941 and 1945, the Chester County COOP stations were as warm on average as the Philadelphia airport, much warmer than Chester County as a whole. By 1970 the stations had cooled on average to the level of Allentown. The cooling corresponds to COOP station changes as the County network transitioned from built-up towns to more rural locations. The biggest changes were the Coatesville (1946+47)and West Chester (1970) moves to less built up sites. Both station cooled by roughly 2F as a result of the moves. Other changes included: Phoenixville cooling relative to other stations and new stations starting in West Grove and Devault both in less built up areas than the pre-1945 stations. 

NOAA is not fooled by the station changes, but Chescowx is. 

 

 

[ChescoWx]

2 hours ago, chubbs said:

NOAA is not fooled by the station changes, but Chescowx is. 

 

Only our man Charlie is fooled as we just can't seem to find any warming at any long term station data unless we add some good old post hoc cooling to all stations (see above for all the man made climate changes to the data) so far we have included Allentown, Coatesville, Phoenixville - all with the needed past man made cooling adjustments to show a warming trend. Now,  Let's add some more - see below that even at Reading they needed to chill all the old data for 100 years to finally produce some warming. All have the same tell tale signatures - the need for historical chilling of the past to try to show warming in the present! Are there any stations around that man did not need to chill (I mean adjust) to show some current warming??

[ChescoWx]

Let's add Quakertown to the chilled man made adjustments to past history to show a warming trend.

[bdgwx]

5 hours ago, ChescoWx said:

Show me the statistical data and reason and reference any station relatively nearby showed the need for a 3 to 4 degree adjustment during those years...

Discussing the justification for corrections is irrelevant if your position is still that corrections should never be applied to fix biases, errors, and/or mistakes.

I'm asking if you still maintain this position because it sounds like you are having second thoughts about it...which is good. But I'm not going to waste my time explaining how we can know what the biases and errors are if you don't think correcting them is ever justified.

[ChescoWx]

21 minutes ago, bdgwx said:

Discussing the justification for corrections is irrelevant if your position is still that corrections should never be applied to fix biases, errors, and/or mistakes.

I'm asking if you still maintain this position because it sounds like you are having second thoughts about it...which is good. But I'm not going to waste my time explaining how we can know what the biases and errors are if you don't think correcting them is ever justified.

If we could only find some actual real station data to use from someplace close to an actual NWS station that helps support these 1 to 4 degree annual average temp adjustments to these many NWS Cooperative Observer stations....we of course cannot find any of those - hence our problem! But if you have those please produce them as Charlie certainly never can seem to come up with any actual real stations with data....

[chubbs]

13 hours ago, ChescoWx said:

If we could only find some actual real station data to use from someplace close to an actual NWS station that helps support these 1 to 4 degree annual average temp adjustments to these many NWS Cooperative Observer stations....we of course cannot find any of those - hence our problem! But if you have those please produce them as Charlie certainly never can seem to come up with any actual real stations with data....

We have thousands of weather stations in the US making it very easy to separate station changes from weather. Year-to-year temperature changes are correlated for hundreds of miles. If West Chester is 2F cooler one year, Coatesville will also experience similar cooling. Why? every station in Chester County and the region experiences the same weather. 

The effect of the Coatesville station move is very clear in the chart below. Other than the move years of 1946 and 1947, both stations have the same year-to-year temperature change. This illustrates the close correlation in the between nearby stations when there are no station changes. However Coatesville cooled significantly relative to West Chester in 1946 and 1947.  Proof that a big station change occurred in that period.

Station changes are permanent. The rural Coatesville Doe run location (1948 and later) is always cooler than the West Chester town location and the city of Coatesville (1945 and earlier). That's why the city of Coatesville gets an big positive adjustment every single year.  Similarly before the 1970 move, West Chester always gets a large positive adjustment because it is warmer than the post move West Chester location.

This isn't rocket science.  Every NOAA adjustment that we have looked at has been spot on based on the raw data and other evidence. Is there something about the chart below you don't understand? 

 

[ChescoWx]

2 hours ago, chubbs said:

We have thousands of weather stations in the US making it very easy to separate station changes from weather. Year-to-year temperature changes are correlated for hundreds of miles. If West Chester is 2F cooler one year, Coatesville will also experience similar cooling. Why? every station in Chester County and the region experiences the same weather. 

The effect of the Coatesville station move is very clear in the chart below. Other than the move years of 1946 and 1947, both stations have the same year-to-year temperature change. This illustrates the close correlation in the between nearby stations when there are no station changes. However Coatesville cooled significantly relative to West Chester in 1946 and 1947.  Proof that a big station change occurred in that period.

Station changes are permanent. The rural Coatesville Doe run location (1948 and later) is always cooler than the West Chester town location and the city of Coatesville (1945 and earlier). That's why the city of Coatesville gets an big positive adjustment every single year.  Similarly before the 1970 move, West Chester always gets a large positive adjustment because it is warmer than the post move West Chester location.

This isn't rocket science.  Every NOAA adjustment that we have looked at has been spot on based on the raw data and other evidence. Is there something about the chart below you don't understand?

Charlie what you meant to say was Why? Because every single station in Chester County shown above and all of the other stations have had adjustments made to the raw actual data that only after that post observation alterations are made can we see any statistical warming at all. Charlie which of the stations Coatesville, Phoenixville, West Chester, Allentown, Quakertown, Reading etc. did NOT have chilling adjustments made to the 1920's thru 1950's with man made climate change adjustments to the raw data??
 

[forkyfork]

2 1/2 hours until the drop happens

[ChescoWx]

2 hours ago, forkyfork said:

2 1/2 hours until the drop happens

I'm betting on a 0.7 to 1.2 degree drop when the fan aspirator kicks on....

[forkyfork]

keep telling yourself it's that

[forkyfork]

also notice how your highs happen closer to 5/6 pm instead of the normal 3/4 pm. that's probably when the heavy shade starts to end

[ChescoWx]

25 minutes ago, forkyfork said:

also notice how your highs happen closer to 5/6 pm instead of the normal 3/4 pm. that's probably when the heavy shade starts to end

Wobbling a bit!! No drop yet but fingers crossed...cmon fan aspiration!!!

 

[ChescoWx]

Must have kicked on earlier today - temp not fluctuating much during today's noon hour - sorry Forky!!