Sunsettommy
Diamond Member
- Mar 19, 2018
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From Global Warming
July 2019 Was Not the Warmest on Record
August 2nd, 2019 by Roy W. Spencer, Ph. D.
EXCERPT:
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].
and
"(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."
LINK
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Here is his other blog post showing the UAH temperature data, that has a .09C COOLING from June:
UAH Global Temperature Update for July, 2019: +0.38 deg. C
August 1st, 2019 by Roy W. Spencer, Ph. D.
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for July, 2019 was +0.38 deg. C, down from the June, 2019 value of +0.47 deg. C:
LINK
============================
I posted these two blog postings to show that the Media who gushes over heatwaves as if they were disasterous, when in reality were largely contaminated by UHI effects. Most of the "records" are being measured in the big cities where UHI is large and not accounted for. here is a Satellite map from space showing obvious UHI effects, where the big cities are hot and the surrounding region distinctly cooler.
LINK
Selected excerpt:
"ECOSTRESS mapped the surface, or ground temperature, of four European cities - Rome, Paris, Madrid and Milan - during the mornings of June 27 and June 28.In the images, hotter temperatures appear in red and cooler temperatures appear in blue. They show how the central core of each city is much hotter than the surrounding natural landscape due to the urban heat island effect - a result of urban surfaces storing and re-radiating heat throughout the day.
The fact that surface temperatures were as high as 77-86 degrees Fahrenheit (25-30 degrees Celsius) in the early morning indicates that much of the heat from previous days was stored by surfaces with high heat capacity (such as asphalt, concrete and water bodies) and unable to dissipate before the next day. The trapped heat resulted in even higher midday temperatures, in the high 40s (Celsius) in some places, as the heat wave continued."
=================================================
The media along with warmists needs to stop the lies, account for the UHI effects better and start using the RURAL temperate database sets instead, to help avoid most of the Urban heating effect on thermometers.
July 2019 Was Not the Warmest on Record
August 2nd, 2019 by Roy W. Spencer, Ph. D.
EXCERPT:
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].
and
"(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."
LINK
===
Here is his other blog post showing the UAH temperature data, that has a .09C COOLING from June:
UAH Global Temperature Update for July, 2019: +0.38 deg. C
August 1st, 2019 by Roy W. Spencer, Ph. D.
The Version 6.0 global average lower tropospheric temperature (LT) anomaly for July, 2019 was +0.38 deg. C, down from the June, 2019 value of +0.47 deg. C:
LINK
============================
I posted these two blog postings to show that the Media who gushes over heatwaves as if they were disasterous, when in reality were largely contaminated by UHI effects. Most of the "records" are being measured in the big cities where UHI is large and not accounted for. here is a Satellite map from space showing obvious UHI effects, where the big cities are hot and the surrounding region distinctly cooler.
LINK
Selected excerpt:
"ECOSTRESS mapped the surface, or ground temperature, of four European cities - Rome, Paris, Madrid and Milan - during the mornings of June 27 and June 28.In the images, hotter temperatures appear in red and cooler temperatures appear in blue. They show how the central core of each city is much hotter than the surrounding natural landscape due to the urban heat island effect - a result of urban surfaces storing and re-radiating heat throughout the day.
The fact that surface temperatures were as high as 77-86 degrees Fahrenheit (25-30 degrees Celsius) in the early morning indicates that much of the heat from previous days was stored by surfaces with high heat capacity (such as asphalt, concrete and water bodies) and unable to dissipate before the next day. The trapped heat resulted in even higher midday temperatures, in the high 40s (Celsius) in some places, as the heat wave continued."
=================================================
The media along with warmists needs to stop the lies, account for the UHI effects better and start using the RURAL temperate database sets instead, to help avoid most of the Urban heating effect on thermometers.
