Carbon Dioxide Information Analysis Center

Annual Estimates of Global Anthropogenic Methane Emissions: 1860-1994. The first estimates, by year, of global man-made emissions of methane, from 1860 through 1994 are provided. The data presented here are revised and updated through 1994. Estimates are provided for total anthropogenic emissions, as well as emissions for the following component categories: Flaring and Venting of Natural Gas; Oil and Gas Supply Systems, Excluding Flaring; Coal Mining; Biomass Burning; Livestock Farming; Rice Farming and Related Activities; Landfills. Changes in emissions over time were estimated by treating emissions as a function of variables (such as population or coal production) for which historical time series are available.

Note: Source no longer publish the data. Monthly and Annual Atmospheric Trace Gases, Carbon Isotopes, Radionuclides, and Aerosols records

NOTICE (March 2018): This website provides access to the CDIAC archive data temporarily. It will be gradually transitioned into data packages in the new ESS-DIVE archive. This site will continue to operate in parallel during and after the transition, and will be retired at a future date. If you have any questions regarding the data or the transition, please contact ess-dive-support@lbl.gov. The carbon-cycle model simulates vegetation, litter, and soil carbonin 12 ecosystem and land-use classifications aggregated to 14 world regions. Land-use transitions are calculated annually on a 0.5 degree grid before aggregation to the regional level. Secondary forest re-growth is simulated in 50-year age classes for non-boreal forest (labeled as 1500_OtherForest, for forest that started regrowing in the period 1500-1549). Carbon stocks as land-use changes (e.g. conversion to cropland or reversion to native ecosystems) are explicitly tracked over time. Regional cropland areas, productivity, and harvest index change over time as estimated from historical data.

Global and zonal temperature deviations (seasonal and annual) from the 25 year average of 1951-1975

Surface temperatures and thickness-derived temperatures from a 54-station, globally distributed radiosonde network have been used to estimate global, hemispheric, and zonal annual and seasonal temperature deviations. Most of the temperature values used were column-mean temperatures, obtained from the differences in height (thickness) between constant-pressure surfaces at individual radiosonde stations. The pressure-height data before 1980 were obtained from published values in Monthly Climatic Data for the World. Between 1980 and 1990, Angell used data from both the Climatic Data for the World and the Global Telecommunications System (GTS) Network received at the National Meteorological Center. Between 1990 and 1995, the data were obtained only from GTS, and since 1995 the data have been obtained from National Center for Atmospheric Research files. The data are evaluated as deviations from the mean based on the interval 1961-1990. Time series for the earth's surface, and the 850-300mb, 300-100mb and 100-50mb layers are presented for north polar (60-90N), north temperate (30-60N), tropical (30S-30N), south temperate (30-60S) and south polar (60-90S) climate zones, as well as for the Northern and Southern hemispheres and the globe. The data presentation is more compact than in the case of Angell's 63-station network, with two fewer layers and three fewer climate zones, for a total of eight time series. CITE AS: Angell, J.K. 2012. Global, hemispheric, and zonal temperature deviations derived from a 54-station radiosonde network. In Trends Online: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. doi: 10.3334/CDIAC/cli.005

Data Tables of Global, Hemispheric, and Zonal Temperature Anomalies. Anomalies are relative to the 1951-1980 base period means. The NASA GISS Surface Temperature (GISTEMP) analysis provides a measure of the changing global surface temperature with monthly resolution for the period since 1880, when a reasonably global distribution of meteorological stations was established.