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I'm sorry I misread what you wanted. From the graph and references, I thought you could figure it out from there. The error for each red point is about +/- .2 degrees C. For the 5 year moving average on the blue curve, the error would be about +/-.05. To answer your OP, the surface temperature over a ten year average is 14.51 deg C for the 2000's. The ten year average for the 1980's is 14.18 deg C. (Goddard Institute for Space Studies) Errors for the later two measurements are about +/- .1 deg C. That translates to 58.12 deg F now and 57.52 in the 1980's. I know you asked for the temperature for the "present", but nobody could possibly know that. A further note that has nothing to do with your OP is that surface temperature is not always a good measure for some analyses of global problems. In the long run, the air temperature in your refrigerator is less important than the temperature of the stuff inside. I don't know of any study of that includes the thermal capacity of the earth mantel, the heat of fusion of ice, thermal gradients in the ocean, etc.
I'm sorry I misread what you wanted. From the graph and references, I thought you could figure it out from there. The error for each red point is about +/- .2 degrees C. For the 5 year moving average on the blue curve, the error would be about +/-.05.
To answer your OP, the surface temperature over a ten year average is 14.51 deg C for the 2000's. The ten year average for the 1980's is 14.18 deg C. (Goddard Institute for Space Studies) Errors for the later two measurements are about +/- .1 deg C. That translates to 58.12 deg F now and 57.52 in the 1980's. I know you asked for the temperature for the "present", but nobody could possibly know that.
A further note that has nothing to do with your OP is that surface temperature is not always a good measure for some analyses of global problems. In the long run, the air temperature in your refrigerator is less important than the temperature of the stuff inside. I don't know of any study of that includes the thermal capacity of the earth mantel, the heat of fusion of ice, thermal gradients in the ocean, etc.
