Global Temperature Report: July 2015
Global climate trend since Nov. 16, 1978: +0.11 C per decade
July temperatures (preliminary)
Global composite temp.: +0.18 C (about 0.32 degrees Fahrenheit) above30-year average for July.
Northern Hemisphere: +0.33 C (about 0.60 degrees Fahrenheit) above 30-yearaverage for July.
Southern Hemisphere: +0.03 C (about 0.05 degrees Fahrenheit) above 30-yearaverage for July.
Tropics: +0.48 C (about 0.86 degrees Fahrenheit) above 30-year average forJuly.
June temperatures (revised):
Global Composite: +0.33 C above 30-year average
Northern Hemisphere: +0.41 C above 30-year average
Southern Hemisphere: +0.25 C below 30-year average
Tropics: +0.46 C above 30-year average
(All temperature anomalies are based on a 30-year average (1981-2010) forthe month reported.)
Notes on data released Aug. 12, 2015:
The tropics continued to warm in July, although the areas between thetropics and both the Arctic and Antarctic regions cooled from June, saidDr. John Christy, director of the Earth System Science Center at TheUniversity of Alabama in Huntsville.
Compared to seasonal norms, the warmest average temperature anomaly onEarth in July was in southeastern Kazakhstan near the city of Almaty. TheJuly temperature there averaged 3.33 C (about 6.0 degrees F) warmer thanseasonal norms. Compared to seasonal norms, the coolest averagetemperature on Earth in July was in the northern Atlantic Ocean off thesoutheastern coast of Greenland, where the average July 2015 temperaturewas 3.77 C (about 6.77 degrees F) cooler than normal.
The complete version 6 beta lower troposphere dataset is available here:
http://vortex.nsstc.uah.edu/data/msu/v6.0beta/tlt/uahncdc_lt_6.0beta2
Archived color maps of local temperature anomalies are available on-line at:
As part of an ongoing joint project between UAHuntsville, NOAA and NASA,Christy and Dr. Roy Spencer, an ESSC principal scientist, use datagathered by advanced microwave sounding units on NOAA and NASA satellitesto get accurate temperature readings for almost all regions of the Earth.This includes remote desert, ocean and rain forest areas where reliableclimate data are not otherwise available.
The satellite-based instruments measure the temperature of the atmospherefrom the surface up to an altitude of about eight kilometers above sealevel. Once the monthly temperature data is collected and processed, it isplaced in a "public" computer file for immediate access by atmosphericscientists in the U.S. and abroad.
Neither Christy nor Spencer receives any research support or funding fromoil, coal or industrial companies or organizations, or from any private orspecial interest groups. All of their climate research funding comes fromfederal and state grants or contracts.
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