Global Warming Project




Global Warming Project

Below are descriptions of the data files that will be used in your projects.
To download the data, simply click on the file name using the right mouse button. Then, click on "Save Link As" and save the file. The file can now be opened in Excel as delimited by spaces.


Instrumental Global Mean Annual Temperatures
This temperature series is derived from a dataset that combines land air temperatures and sea surface temperatures into 5 latitude by 5 longitude grid boxes. Both temperatures are expressed as departures from the 1961-1990 mean. The grid box temperature departures are then averaged to give a global mean. The units are C.

Further information can be obtained here.

Mean Annual CO2
This CO2 series is a combination of data from air bubbles in the Siple Station, West Antarctica ice core (through 1953) and from air samples collected at Mauna Loa Observatory, Hawaii (1959-2006). The units are parts per million by volume.

Further information can be obtained here and here.

Annual Volcanic Index
This volcanic index series is based on the Dust Veil Index, a numerical index that quantifies the impact of a particular volcanic eruption's release of dust and aerosols. This series is cumulative for all eruptions in a given year, with the year of eruption and the three following years being given increasingly smaller weights. There are no units for this index.

Further information can be obtained here.

Mean Annual Solar Irradiance
This series is a reconstruction based on contemporary solar and stellar monitoring, along with the historical sunspot record of solar activity. The units are in W/m2 and
represent irradiance received at the top of the atmosphere.

Further information can be obtained here .

Satellite Lower Troposphere Mean Annual Temperatures
This temperature series is derived from data acquired from sensors aboard weather satellites. These sensors measure microwave radiation from the lower troposphere (the lowest part of the atmosphere). The temperatures are expressed as departures from the 1979-1998 mean and combined into 2.5 latitude by 2.5 longitude grid boxes. The grid box temperature departures are then averaged to give a global mean. The units are C.

Further information can be obtained here.



If you have questions on any of the above data, contact Frank Keimig.