Sunday, November 22, 2009

Global Temperatures

Last Update: 01-18-2010

Below is a chart that some may find useful. It combines various global temperature estimates:
  • HadCRU3v: measurements from land stations + SST, starts in 1850, the reference period is 1961-1990. data link.
  • NASA GISS: measurements from land stations + SST, starts in 1880, the reference period is 1951-1980. data link.
  • NCDC: measurements from land stations + SST starts in 1880, the reference period is 1951-1980. data link.
  • UAH versions 5.2: satellite based measurements of the lower troposphere, starts in 1979, the reference period is 1979-2000. data available here.

Each dataset has a different reference period. A temperature offset is added to CRU, NCDC and UAH temperatures in order to represent the temperatures in a common reference period (1951-1980). The offset values are the following (in deg. C):
  • CRU: 0.0855
  • NCDC: -0.0330
  • UAH: 0.2425

Figure 1. Adjusted global temperature estimates. Click on the image to get a svg image.

Over the period 1979-2009, we can compute the median temperature value from the four estimates. The August median temperature measurement is +0.62 deg. C (98.2% of observed values are below).

Figure 2. (Red) median temperature estimate from 1979 to August 2009. (light yellow) range of temperature values; (yellow) 99% probability interval. The blue curve is the empirical CDF curve derived from all the datasets combined. Click on the image to get a svg image.

1 comment:

  1. Anonymous4:39 AM

    Designing for different fashionable replica omega is completely impressive. Those designer purses include a attractive appearance with the temperament within the gal. Mainly because pieces are becoming a key device for the most women within the period of time, so as to require the crucial element together with necessary property alongside one another, for this reason it's best to offer alongside one another wholly coordinated cheap replica rolex, if your man choose out of your home. No matter what, where you stand moving. It really is an individual's work place job as well as a occasion, however pieces is merely an absolute must have. A good fashionable replica breitling watches can not mainly manifest as a effortless facsimile of each genuine, it all desires to maintain stability in addition to a attentive structure layout designed to backup any realistic brands. The best hermes handbags replica duplicate ought to be that comes with any type seal off, wonderful protect or simply colors, and now have similar structure having a insures, lcks, together with zippers. Anytime these details happen to be produced from a synthetic version fashionable panerai luminor marina, consequently the shows that the maker can be involved utilizing superior ınstead of just pretend. Your handmade jewelry is certainly loaded with thoroughly so that it is certainly secured with all hurt during transit.