Surface temperatures today
may be warmer than in 1880,
but we will never really know
by how much.
NASA GISS tracks 2089 stations
in Version 3 unadjusted data.
Only 997 of these surface
weather stations have Version 3
unadjusted data that's complete,
from 1919:
1919 temperatures are lacking
over Africa, Canada, the Arctic
and all across the Southern
Hemisphere.
Only 174 surface stations
go back to 1880 in Version 3
unadjusted data.
1880 only includes
some parts of
the US and Europe.
Nothing for Canada and Russia.
It's impossible to know the actual
global average temperature
in 1880.
There are far too few
observing stations
in the 1800s and early 1900s.
The distribution of surface
measurements was very
uneven until the use of
weather satellites in 1979.
“These (surface) datasets
are products of
simulation models and
data assimilation software,
not real data,”
Japanese climate scientist
Dr. Nakamura claims.
“This problem has been present
in data products produced by
all institutions from the beginning
– NASA, NOAA, NCEP, ECMWF,
UMet, etc.”
“Spatial bias before 1980
cannot be dealt with”
“A far more serious issue
with calculating ‘the global
mean surface temperature trend’
is the acute spatial bias
in the observation stations.
There is nothing they can do
about this either.
No matter what they do
with the simulation models
and data assimilation programs,
this spatial bias before 1980
cannot be dealt with
in any meaningful way.
Just look at the locations
of the observation stations
used in GISS products
for various years on their page.”
“The global surface mean
temperature change data
no longer have
any scientific value
and are nothing except
a propaganda tool to the public.”