I need to do a project on global warming for Pre-cal and i need to find the annual global temp from 1980 - 2008. I found this table with a bunch of numbers on it on the NASA website. I tried using the little conversion formula at the bottom of the page and i found the difference in average temperature between 1980 and 2008. What I got was 32F(.19C) for 1980 and 33F(.58C) for 2008 and this doesn't seem right to me because the difference in temperature is only 1 degree Fahrenheit. I was using the "Combined Land-Surface Air and Sea-Surface Water Temperature Anomalies (Land-Ocean Temperature Index, LOTI)" table. There's another table called "Means Based on Land-Surface Air Temperature Anomalies Only (Meteorological Station rel="nofollow">http:// rel="nofollow">http://data.giss.nasa.gov/gistemp/
Btw I used the J-D number on the table, not the D-N.
Answers & Comments
Verified answer
NASA maintain two primary global temperature records – LOTI and dTs. Because LOTI is both land and oceans the values are slightly lower than the dTs record - which is surface stations only.
I’ve got all the temp records so to save you messing about I’ve run off the figures and reproduced them below.
What I forgot to mention when I first posted this answer is that all values are expressed as anomalies against the base period mean. NASA uses the period from 1951 to 1980 as it’s base period. In the first table below the first values for 1980 are 0.128°C and 0.231°F , what this means is that 1980 was 0.128°C / 0.231°F warmer than the average temperature during the period 1951 to 1980.
The last two figures on each line are the actual temps as they would be observed on a thermometer. Thus, for 1980 the average global temp was 14.128°C / 57.431°F.
As for which data to use, I’d use the data from the first table below as it’s an average of both the NASA records. This means it’s calculated from twice as many datapoints and the values are midway between the LOTI and dTs records; and are therefore more representative.
Average of LOTI and dTs
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
1980 . . . 0.128°C . . . 0.231°F . . .● . . . 1980 . . . 14.128°C . . . 57.431°F
1981 . . . 0.141°C . . . 0.254°F . . .● . . . 1981 . . . 14.141°C . . . 57.454°F
1982 . . . 0.154°C . . . 0.277°F . . .● . . . 1982 . . . 14.154°C . . . 57.477°F
1983 . . . 0.177°C . . . 0.319°F . . .● . . . 1983 . . . 14.177°C . . . 57.519°F
1984 . . . 0.188°C . . . 0.339°F . . .● . . . 1984 . . . 14.188°C . . . 57.539°F
1985 . . . 0.199°C . . . 0.359°F . . .● . . . 1985 . . . 14.199°C . . . 57.559°F
1986 . . . 0.220°C . . . 0.396°F . . .● . . . 1986 . . . 14.220°C . . . 57.596°F
1987 . . . 0.241°C . . . 0.434°F . . .● . . . 1987 . . . 14.241°C . . . 57.634°F
1988 . . . 0.256°C . . . 0.460°F . . .● . . . 1988 . . . 14.256°C . . . 57.660°F
1989 . . . 0.276°C . . . 0.497°F . . .● . . . 1989 . . . 14.276°C . . . 57.697°F
1990 . . . 0.301°C . . . 0.541°F . . .● . . . 1990 . . . 14.301°C . . . 57.741°F
1991 . . . 0.327°C . . . 0.588°F . . .● . . . 1991 . . . 14.327°C . . . 57.788°F
1992 . . . 0.344°C . . . 0.619°F . . .● . . . 1992 . . . 14.344°C . . . 57.819°F
1993 . . . 0.359°C . . . 0.647°F . . .● . . . 1993 . . . 14.359°C . . . 57.847°F
1994 . . . 0.377°C . . . 0.679°F . . .● . . . 1994 . . . 14.377°C . . . 57.879°F
1995 . . . 0.393°C . . . 0.708°F . . .● . . . 1995 . . . 14.393°C . . . 57.908°F
1996 . . . 0.396°C . . . 0.712°F . . .● . . . 1996 . . . 14.396°C . . . 57.912°F
1997 . . . 0.408°C . . . 0.734°F . . .● . . . 1997 . . . 14.408°C . . . 57.934°F
1998 . . . 0.412°C . . . 0.742°F . . .● . . . 1998 . . . 14.412°C . . . 57.942°F
1999 . . . 0.424°C . . . 0.763°F . . .● . . . 1999 . . . 14.424°C . . . 57.963°F
2000 . . . 0.438°C . . . 0.788°F . . .● . . . 2000 . . . 14.438°C . . . 57.988°F
2001 . . . 0.449°C . . . 0.809°F . . .● . . . 2001 . . . 14.449°C . . . 58.009°F
2002 . . . 0.456°C . . . 0.821°F . . .● . . . 2002 . . . 14.456°C . . . 58.021°F
2003 . . . 0.460°C . . . 0.829°F . . .● . . . 2003 . . . 14.460°C . . . 58.029°F
2004 . . . 0.471°C . . . 0.849°F . . .● . . . 2004 . . . 14.471°C . . . 58.049°F
2005 . . . 0.474°C . . . 0.853°F . . .● . . . 2005 . . . 14.474°C . . . 58.053°F
2006 . . . 0.479°C . . . 0.862°F . . .● . . . 2006 . . . 14.479°C . . . 58.062°F
2007 . . . 0.498°C . . . 0.897°F . . .● . . . 2007 . . . 14.498°C . . . 58.097°F
2008 . . . 0.519°C . . . 0.933°F . . .● . . . 2008 . . . 14.519°C . . . 58.133°F
2009 . . . 0.534°C . . . 0.962°F . . .● . . . 2009 . . . 14.534°C . . . 58.162°F
2010 . . . 0.543°C . . . 0.977°F . . .● . . . 2010 . . . 14.543°C . . . 58.177°F
LOTI Record Only
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
1980 . . . 0.111°C . . . 0.200°F . . .● . . . 1980 . . . 14.111°C . . . 57.400°F
1981 . . . 0.122°C . . . 0.219°F . . .● . . . 1981 . . . 14.122°C . . . 57.419°F
1982 . . . 0.135°C . . . 0.243°F . . .● . . . 1982 . . . 14.135°C . . . 57.443°F
1983 . . . 0.155°C . . . 0.280°F . . .● . . . 1983 . . . 14.155°C . . . 57.480°F
1984 . . . 0.163°C . . . 0.294°F . . .● . . . 1984 . . . 14.163°C . . . 57.494°F
1985 . . . 0.173°C . . . 0.312°F . . .● . . . 1985 . . . 14.173°C . . . 57.512°F
1986 . . . 0.193°C . . . 0.347°F . . .● . . . 1986 . . . 14.193°C . . . 57.547°F
1987 . . . 0.211°C . . . 0.380°F . . .● . . . 1987 . . . 14.211°C . . . 57.580°F
1988 . . . 0.225°C . . . 0.405°F . . .● . . . 1988 . . . 14.225°C . . . 57.605°F
1989 . . . 0.243°C . . . 0.438°F . . .● . . . 1989 . . . 14.243°C . . . 57.638°F
1990 . . . 0.266°C . . . 0.478°F . . .● . . . 1990 . . . 14.266°C . . . 57.678°F
1991 . . . 0.289°C . . . 0.521°F . . .● . . . 1991 . . . 14.289°C . . . 57.721°F
1992 . . . 0.304°C . . . 0.547°F . . .● . . . 1992 . . . 14.304°C . . . 57.747°F
1993 . . . 0.318°C . . . 0.573°F . . .● . . . 1993 . . . 14.318°C . . . 57.773°F
1994 . . . 0.334°C . . . 0.602°F . . .● . . . 1994 . . . 14.334°C . . . 57.802°F
1995 . . . 0.350°C . . . 0.630°F . . .● . . . 1995 . . . 14.305°C . . . 57.830°F
1996 . . . 0.353°C . . . 0.635°F . . .● . . . 1996 . . . 14.353°C . . . 57.835°F
1997 . . . 0.364°C . . . 0.655°F . . .● . . . 1997 . . . 14.364°C . . . 57.855°F
1998 . . . 0.368°C . . . 0.662°F . . .● . . . 1998 . . . 14.368°C . . . 57.862°F
1999 . . . 0.379°C . . . 0.682°F . . .● . . . 1999 . . . 14.379°C . . . 57.882°F
2000 . . . 0.392°C . . . 0.706°F . . .● . . . 2000 . . . 14.392°C . . . 57.906°F
2001 . . . 0.403°C . . . 0.726°F . . .● . . . 2001 . . . 14.403°C . . . 57.926°F
2002 . . . 0.409°C . . . 0.737°F . . .● . . . 2002 . . . 14.409°C . . . 57.937°F
2003 . . . 0.414°C . . . 0.745°F . . .● . . . 2003 . . . 14.414°C . . . 57.945°F
2004 . . . 0.425°C . . . 0.764°F . . .● . . . 2004 . . . 14.425°C . . . 57.964°F
2005 . . . 0.427°C . . . 0.769°F . . .● . . . 2005 . . . 14.427°C . . . 57.969°F
2006 . . . 0.432°C . . . 0.777°F . . .● . . . 2006 . . . 14.432°C . . . 57.977°F
2007 . . . 0.449°C . . . 0.808°F . . .● . . . 2007 . . . 14.449°C . . . 58.008°F
2008 . . . 0.467°C . . . 0.841°F . . .● . . . 2008 . . . 14.467°C . . . 58.041°F
2009 . . . 0.482°C . . . 0.867°F . . .● . . . 2009 . . . 14.482°C . . . 58.067°F
2010 . . . 0.489°C . . . 0.881°F . . .● . . . 2010 . . . 14.489°C . . . 58.081°F
dTs Record Only
¯¯¯¯¯¯¯¯¯¯¯¯¯¯
1980 . . . 0.146°C . . . 0.262°F . . .● . . . 1980 . . . 14.146°C . . . 57.462°F
1981 . . . 0.160°C . . . 0.288°F . . .● . . . 1981 . . . 14.160°C . . . 57.488°F
1982 . . . 0.173°C . . . 0.312°F . . .● . . . 1982 . . . 14.173°C . . . 57.512°F
1983 . . . 0.199°C . . . 0.358°F . . .● . . . 1983 . . . 14.199°C . . . 57.558°F
1984 . . . 0.213°C . . . 0.384°F . . .● . . . 1984 . . . 14.213°C . . . 57.584°F
1985 . . . 0.225°C . . . 0.405°F . . .● . . . 1985 . . . 14.225°C . . . 57.605°F
1986 . . . 0.247°C . . . 0.445°F . . .● . . . 1986 . . . 14.247°C . . . 57.645°F
1987 . . . 0.271°C . . . 0.489°F . . .● . . . 1987 . . . 14.271°C . . . 57.689°F
1988 . . . 0.287°C . . . 0.516°F . . .● . . . 1988 . . . 14.287°C . . . 57.716°F
1989 . . . 0.309°C . . . 0.556°F . . .● . . . 1989 . . . 14.309°C . . . 57.756°F
1990 . . . 0.335°C . . . 0.604°F . . .● . . . 1990 . . . 14.335°C . . . 57.804°F
1991 . . . 0.365°C . . . 0.656°F . . .● . . . 1991 . . . 14.365°C . . . 57.856°F
1992 . . . 0.384°C . . . 0.691°F . . .● . . . 1992 . . . 14.384°C . . . 57.891°F
1993 . . . 0.400°C . . . 0.720°F . . .● . . . 1993 . . . 14.400°C . . . 57.920°F
1994 . . . 0.420°C . . . 0.755°F . . .● . . . 1994 . . . 14.420°C . . . 57.955°F
1995 . . . 0.437°C . . . 0.786°F . . .● . . . 1995 . . . 14.437°C . . . 57.986°F
1996 . . . 0.439°C . . . 0.789°F . . .● . . . 1996 . . . 14.439°C . . . 57.989°F
1997 . . . 0.452°C . . . 0.814°F . . .● . . . 1997 . . . 14.452°C . . . 58.014°F
1998 . . . 0.457°C . . . 0.822°F . . .● . . . 1998 . . . 14.457°C . . . 58.022°F
1999 . . . 0.469°C . . . 0.845°F . . .● . . . 1999 . . . 14.469°C . . . 58.045°F
2000 . . . 0.483°C . . . 0.870°F . . .● . . . 2000 . . . 14.483°C . . . 58.070°F
2001 . . . 0.496°C . . . 0.892°F . . .● . . . 2001 . . . 14.496°C . . . 58.092°F
2002 . . . 0.503°C . . . 0.905°F . . .● . . . 2002 . . . 14.503°C . . . 58.105°F
2003 . . . 0.507°C . . . 0.913°F . . .● . . . 2003 . . . 14.507°C . . . 58.113°F
2004 . . . 0.518°C . . . 0.933°F . . .● . . . 2004 . . . 14.518°C . . . 58.133°F
2005 . . . 0.521°C . . . 0.938°F . . .● . . . 2005 . . . 14.521°C . . . 58.138°F
2006 . . . 0.526°C . . . 0.947°F . . .● . . . 2006 . . . 14.526°C . . . 58.147°F
2007 . . . 0.548°C . . . 0.986°F . . .● . . . 2007 . . . 14.548°C . . . 58.186°F
2008 . . . 0.570°C . . . 1.026°F . . .● . . . 2008 . . . 14.570°C . . . 58.226°F
2009 . . . 0.587°C . . . 1.056°F . . .● . . . 2009 . . . 14.587°C . . . 58.256°F
2010 . . . 0.596°C . . . 1.074°F . . .● . . . 2010 . . . 14.596°C . . . 58.274°F
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