The phrase "global average temperature" is correct and can be used in written English.
For example, "According to recent reports, the global average temperature has increased by 1.1°C since pre-industrial times."
Last year, 2015, was the warmest year globally on record and we crossed the 1°C mark for global average temperature increase.
Sensitivity to strength of forcing of the global average temperature (a) and sea-level rise (b).
We present the coefficients relative to 1 °C increases in global average temperature.
And then they say run your models and give us your output for global average temperature.
The calculations produce the global average temperature deviations from the baseline period of 1951 to 1980.
Less than 0.02 degree Centigrade increase [two ONE HUNDREDTHS of a degree!!] global average temperature.
The global average temperature, if you average it over several years, is going up pretty smoothly, since the middle 1970s.
In truth, however, nobody expects the global average temperature to rise smoothly from one year to the next.
Many parts of southern Europe could face desertification if global average temperature rises by significantly more than 2 centigrade degrees".
Through April, the global average temperature was 2.6°F (1.45°C) above the average from that earlier period.
Past studies analysed a wide range of SRM objectives including: returning global average temperature to the pre-industrial9,10, holding global average temperature constant11,12, limiting sea-level rise13 and maximizing economic net-benefits14,15 net-benefits14,15
