??Global Temperatures: “2013 ties with 2003 as the fourth warmest year globally since records began in 1880”
USA NCDC — The annually-averaged temperature across global land and ocean surfaces was 0.62 ??C (1.12 ??F) above the 20th century average and marks the 37th consecutive year (since 1976) that the annual temperature was above the long-term average.
Currently, the warmest year on record is 2010, which was 0.66 ??C (1.19 ??F) above average.
To date, including 2013, 9 of the 10 warmest years on record have occurred during the 21st century. Only one year during the 20th century???1998???was warmer than 2013.
The global annual temperature has increased at an average rate of 0.06 ??C (0.11 ??F) per decade since 1880 and at an average rate of 0.16 ??C (0.28 ??F) per decade since 1970.
Top 10 Warmest Years (1880???2013)
The following table lists the global combined land and ocean annually-averaged temperature rank and anomaly for each of the 10 warmest years on record.
1 = Warmest
Period of Record: 1880???2013
|Year||Anomaly ??C||Anomaly ??F|
*Note: Tie is based on temperature anomaly in ??C.
Separately, the average global land temperature was 0.99 ??C (1.78 ??F) above the 20th century average and ranked as the fourth highest annually-averaged value on record.
Because land surfaces generally have low heat capacity, temperature anomalies can vary greatly between months. Over the course of 2013, the average monthly land temperature anomaly ranged from +0.71 ??C (+1.28 ??F; April, August) to +1.43 ??C (+2.57 ??F; November), a difference of 0.72 ??C (1.29 ??F).
The ocean has a much higher heat capacity than land and thus anomalies tend to vary less over monthly timescales. During the year, the global monthly ocean temperature anomaly ranged from +0.40 ??C (+0.72 ??F; January) to +0.56 ??C (+1.01 ??F; September), a difference of 0.16 ??C (0.29 ??F).
For the period January???December, continual ENSO-neutral conditions contributed to a globally-averaged ocean surface temperature departure of 0.48 ??C (0.86 ??F) above the 20th century average, tying with 2006 as the eighth warmest year on record.
This is 0.04 ??C (0.07 ??F) below the record high annually-averaged ocean temperature of 0.58 ??C (1.04 ??F), which was observed in both 1998 and 2003.
Visit the USA NCDC’s webpage at www.ncdc.noaa.gov/sotc/global/2013/13 to read the rest of this report.
NOAA National Climatic Data Center, State of the Climate: Global Analysis for Annual 2013, published online December 2013, retrieved on January 21, 2014 from http://www.ncdc.noaa.gov/sotc/global/2013/13.
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