Originally Posted by david85
What Jeff did with his graph was use the yearly average which needless to say isn't the whole story. This is a month by month graph that includes the global peak of 1998.
Well, first, I have no idea what data set you are using or what the months covered are. Assuming your trend line is correct (and I have no reason to believe it isn’t) I can’t really comment as to why your line shows a downward slope. Could you be using regional monthly data rather than global monthly data? What’s the date range covered? When discussing climatic trends, ranges of less than 10 years will be problematic.
Using the global monthly temperature anomalies data from the NASA site that you referenced (here’s the link to the data set again http://data.giss.nasa.gov/gistemp/tabledata/GLB.Ts.txt
), I graphed the range from January 1998 to December 2008 and got the following graph.
The bigger question however is why do you think that you and I, arguing on an Internet web site, building graphs in Excel, will pull some breakthrough insight out of data that has been reviewed and analyzed by thousands of climatologists and geophysicists? Do you really think they all missed this cooling trend (or they are conspiring to hide it)?
I would be comfortable saying that global temp has not gone past the peak of 1998.
Might be comfortable, but you’d be comfortably wrong
Highest Average Monthly Temperature Anomaly in 1998 – Feb. – 1.02
March 2002 – 1.02
January 2007 – 1.06
And looking at the annual (Jan-Dec) temperature anomalies:
1998 – 0.70
2005 – 0.75
2007 – 0.72
And the planet is still warming.