TOKYO, Dec. 13 (Xinhua) -- The average global land temperature is likely to rise 0.67 degree Celsius in 2007 from that of the 30 years starting 1971, reaching a new high in the mankind's recorded history, the Japan Meteorological Agency said in a preliminary report on Thursday.

    While taking into sea areas, the global average temperature may rise 0.29 degree Celsius from the 30-year basis, the sixth highest since 1891, said the report based on statistics from more than 1,200 observation points all over the world until November.

    The agency ascribed the temperature climb mainly to increased greenhouse gases emissions, cyclical temperature fluctuations and less cold air generated from the Arctic.

    The agency recorded previous highest global and land average temperatures in 1998.