back to first page [..] = Temperatures = == Worldclim database == Download at http://www.worldclim.org/current and choose ESRI grids see ["temperature download and load"] for processing [[BR]] Documentation at http://www.worldclim.org/worldclim_IJC.pdf [[BR]] Covered period : 1950-2000 from January to December[[BR]] The data layers were generated through interpolation of average monthly climate data from weather stations on a 30 arc-second resolution grid (often referred to as "1 km2" resolution). Variables included are monthly total precipitation, and monthly mean, minimum and maximum temperature, and 19 derived bioclimatic variables.[[BR]] The thin-plate smoothing spline algorithm implemented in the ANUSPLIN package for interpolation, using latitude, longitude, and elevation as independent variables was used.[[BR]] == CRU database == Download temperature from the CRU database at http://www.cru.uea.ac.uk/cru/data/temperature/#datdow [[BR]]It's easily to use the Tetyn software to extract the data [[BR]] http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VHC-4RH2T1F-3&_user=5403746&_coverDate=07%2F31%2F2008&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1314310325&_rerunOrigin=google&_acct=C000037979&_version=1&_urlVersion=0&_userid=5403746&md5=60ff8632e9c28071cdf136797df0a660 or at http://www.cru.uea.ac.uk/cru/data/hrg/ http://www.cru.uea.ac.uk/cru/data/hrg/cru_ts_2.10/data_all/ Have a look at http://www.cru.uea.ac.uk/~timm/data/index.html [[BR]] http://badc.nerc.ac.uk/browse/badc/cru/data [[BR]] Covered period : 1850-2009 (Anomalies are relative to the 1961-90 reference period means.) from January to December.[[BR]] It's land air temperature anomalies on a 5° by 5° grid-box basis.[[BR]] [[Image(source:data/Docs/trac/Temperature/temperature CRU.jpg,300px)]] 3000 monthly station temperature time series are used. The number of available stations was small during the 1850s, but increases to over 3000 stations during the 1951-90 period.[[BR]] Annual values are approximately accurate to +/- 0.05°C (two standard errors) for the period since 1951.[[BR]] Data represent temperature anomalies wrt 1961-90 °C[[BR]] Missing values represented by -1.000e+30[[BR]] Absolute is just the twelve monthly averages for 1961-90: there are no years [[BR]] == How to download and extract the data from CRU == * ["Temperature download and load"] * ["CookBook join Temperature_CCM"] == How to calcul the temperature in winter and summer per year == * ["Calculating annual, winter and summer temperatures per year"]