The surface hydrological variables are more difficult to observe and
analyse than surface temperature.
Not exact matches
Analysing surface temperature data for 1979 - 2015, they link a warm Arctic during March to colder -
than - average
temperatures over northern regions of North America and dry conditions in central southern areas between March and May.
European researchers, under the Copernicus Climate Service, using a slightly different method of
analysing the
surface temperature data
than Nasa, also found that February 2016 was by far the warmest month on record.