Search Results for: tobs

There is no meaningful difference in Missouri temperature trends between morning/night and afternoon stations. TOBS adjustments do nothing but corrupt the data set.

NOAA makes a large adjustment to the US temperature record based on Time Of Observation Bias. The idea is that most station operators were morons in the 1930’s, and reset their min/max thermometers in the afternoon – causing double counting … Continue reading →

Originally posted on NOT A LOT OF PEOPLE KNOW THAT:
By Paul Homewood? ? ? In 2007, the US temperature trend, according to GISS, was this: ? http://data.giss.nasa.gov/gistemp/2007/ ? ? On 5-year means, the recent peak from 1998-2002 was just…

I ran another test of TOBS-resistant data. Any day which has a higher maximum than the previous day can not  be due to TOBS double counting. The graph below shows the percent of days over 90 degrees, which were also hotter than … Continue reading →

Time of Observation Bias (TOBS)  is the first refuge of climate scoundrels. It is normally described by alarmists as “they used to take temperatures in the afternoon, but now they take them in the morning.” This explanation is complete nonsense. … Continue reading →

One of the main excuses used for this data tampering is time of observation bias, which is based on the idea that people operating thermometers used to be complete morons, and would reset their min/max thermometers only once per day near … Continue reading →

Testing TOBS by station removal is a little tricky because morning stations tend to be in warmer parts of the country, so diverging regional trends affect the result. But one state had a 50/50 mix of morning/afternoon stations in July … Continue reading →

The standard excuse for tampering with US data is that people used be incredibly stupid and reset their min/max thermometers only once during the heat of the day – causing double counting of hot afternoons. It is easy enough to test … Continue reading →

The TOBS adjustment did not change between the 1990’s USHCN V1 and the current V2. They can’t use Time Of Observation Bias as an excuse for this data tampering.

There are 318 US HCN stations which recorded their min/max readings during morning or night on July 15, 1936. These stations should have an artificial warming bias, because of TOBS double counting of low temperatures in the 1930’s. Like the … Continue reading →