How Reliable Are Temperature Records In Africa?

NOT A LOT OF PEOPLE KNOW THAT

By Paul Homewood

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http://data.giss.nasa.gov/cgi-bin/gistemp/nmaps.cgi?sat=4&sst=3&type=anoms&mean_gen=0112&year1=2013&year2=2013&base1=1951&base2=1980&radius=1200&pol=rob

According to GISS, Africa is one of the fastest warming places on Earth, with last year being anywhere between 0.5C and 2C warmer than the 1951-80 baseline.

But just how reliable is the data there? Let’s take a closer look at East Africa, and, in particular, Tanzania.

There are just four GHCN stations there currently reporting, i.e. the ones used by GISS. These are listed below.

LocationPopulation
x 1000
AirportBrightness
Index
Date Range
Mwanza700101923-2014
Tabora227Y1893-2014
Dar es Salaam4364Y131949-2014
Songea130Y1949-2014

http://data.giss.nasa.gov/gistemp/station_data/v3.temperature.inv.txt

So straightaway we find that there are no rural sites, using population as an indicator, and three of the sites are airport based.

To allow for UHI effect, GISS rely on Brightness to determine if a site is rural or not, with Dark = Rural. The Brightness Index runs from 0…

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