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[1] [2] The resulting temperature profiles depend on details of the methods that are used to obtain temperatures from radiances. As a result, different groups that have analyzed the satellite data have produced differing temperature datasets. The satellite time series is not homogeneous.
Data are provided as temperature anomalies against the seasonal average over a past basis period, as well as in absolute temperature values. The baseline period for the published temperature anomalies was changed in January 2021 from 1981-2010 to 1991-2020. [4] All the data products can be downloaded from the UAH server. [5]
The initial version of Global Historical Climatology Network was developed in the summer of 1992. [3] This first version, known as Version 1 was a collaboration between research stations and data sets alike to the World Weather Records program and the World Monthly Surface Station Climatology from the National Center for Atmospheric Research. [4]
They addressed this problem by combining the surface temperature measurements with satellite data to fill in the coverage. Over the time period 1979-2016, combining the HadCRUT4 surface data with UAH satellite coverage, they show a global surface-warming trend of 0.188 °C/decade.
Reconstructions of global temperature of the past 2000 years, using composite of different proxy methods. In the study of past climates ("paleoclimatology"), climate proxies are preserved physical characteristics of the past that stand in for direct meteorological measurements [1] and enable scientists to reconstruct the climatic conditions over a longer fraction of the Earth's history.
The surface temperature record extended back to 1880. (UAH 2003; data set tltglhmam version 5.2 with 2009 updates) and Schabel et al. (RSS 2002; data set tlt_land_and_ocean with 2009 updates). These two satellite records reflect two different ways of interpreting the same set of microwave sounder measurements and are not independent records.
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The first weather satellite to be considered a success was TIROS-1, launched by NASA on April 1, 1960. [5] TIROS operated for 78 days and proved to be much more successful than Vanguard 2. Other early weather satellite programs include the 1962 Defense Satellite Applications Program (DSAP) [6] and the 1964 Soviet Meteor series.