today that both August and September were the hottest globally since
reliable instrument records began in the 1880′s.
combined average temperature over global land and ocean surfaces for
September 2014 was the highest on record for September, at 0.72°C
(1.30°F) above the 20th century average of 15.0°C (59.0°F).
global land surface temperature was 0.89°C (1.60°F) above the 20th
century average of 12.0°C (53.6°F), the sixth highest for September
on record. For the ocean, the September global sea surface
temperature was 0.66°C (1.19°F) above the 20th century average of
16.2°C (61.1°F), the highest on record for September and also the
highest on record for any month.
combined global land and ocean average surface temperature for the
January–September period (year-to-date) was 0.68°C (1.22°F) above
the 20th century average of 14.1°C (57.5°F), tying with 1998 as the
warmest such period on record.
also looks very likely that 2014 will become the hottest year on
NOAA: It looks increasingly likely that 2014 will be the hottest
year on the instrumental record. Click for larger version.
first nine months of 2014 (January–September) tied with 1998 as the
warmest such period on record, with a combined global land and ocean
average surface temperature 0.68°C (1.22°F) above the 20th century
average of 14.1°C (57.5°F). If 2014 maintains this temperature
departure from average for the remainder of the year, it will be the
warmest calendar year on record.
The past 12 months—October
2013–September 2014—was the warmest 12-month period among all
months since records began in 1880, at 0.69°C (1.24°F) above the
20th century average. This breaks the previous record of +0.68°C
(+1.22°F) set for the periods September 1998–August 1998, August
2009–July 2010; and September 2013–August 2014.
average global sea surface temperature was the highest for
January–September in the 135-year period of record, while the
average land surface temperature was the sixth highest on record.