July 2019 Was Not the Warmest on Record

Dec 2014
17,122
6,154
The Milky Way
#71
Truth is that they aren't using many if any instruments that are better than ±0.5º yet they give numbers out to hundreth's of degrees. It is just more proof that AGW is the religion of the godless.
 
Jan 2018
922
959
The greatest place in America, California
#72
Actual data not farce.


July 2019 was probably the 4th warmest of the last 41 years. Global “reanalysis” datasets need to start being used for monitoring of global surface temperatures. [NOTE: It turns out that the WMO, which announced July 2019 as a near-record, relies upon the ERA5 reanalysis which apparently departs substantially from the CFSv2 reanalysis, making my proposed reliance on only reanalysis data for surface temperature monitoring also subject to considerable uncertainty].
We are now seeing news reports (e.g. CNN, BBC, Reuters) that July 2019 was the hottest month on record for global average surface air temperatures.​
One would think that the very best data would be used to make this assessment. After all, it comes from official government sources (such as NOAA, and the World Meteorological Organization [WMO]).​
But current official pronouncements of global temperature records come from a fairly limited and error-prone array of thermometers which were never intended to measure global temperature trends. The global surface thermometer network has three major problems when it comes to getting global-average temperatures:​
(1) The urban heat island (UHI) effect has caused a gradual warming of most land thermometer sites due to encroachment of buildings, parking lots, air conditioning units, vehicles, etc. These effects are localized, not indicative of most of the global land surface (which remains most rural), and not caused by increasing carbon dioxide in the atmosphere. Because UHI warming “looks like” global warming, it is difficult to remove from the data. In fact, NOAA’s efforts to make UHI-contaminated data look like rural data seems to have had the opposite effect. The best strategy would be to simply use only the best (most rural) sited thermometers. This is currently not done.​
(2) Ocean temperatures are notoriously uncertain due to changing temperature measurement technologies (canvas buckets thrown overboard to get a sea surface temperature sample long ago, ship engine water intake temperatures more recently, buoys, satellite measurements only since about 1983, etc.)​
(3) Both land and ocean temperatures are notoriously incomplete geographically. How does one estimate temperatures in a 1 million square mile area where no measurements exist?​
There’s a better way.​
...​


July 2019 Was Not the Warmest on Record « Roy Spencer, PhD
I will take the noaa data over Roy's anyday.
 
Jan 2018
922
959
The greatest place in America, California
#73
Truth is that they aren't using many if any instruments that are better than ±0.5º yet they give numbers out to hundreth's of degrees. It is just more proof that AGW is the religion of the godless.
Be careful you may not have any clothes. Enjoy the lies king.