(Yes, I misspelled "Cowtan" in the title.)
This paper points out the apples-and-oranges nature of models vs. temperature data.
Robust comparison of climate models with observations using blended land air and ocean sea surface temperatures - Cowtan - 2015 - Geophysical Research Letters - Wiley Online Library
Chemistry The University of York
An apples to apples comparison of global temperatures Climate Lab Book
The summary:
Models project near-surface air temperatures everywhere.
The global temperature averages don't measure the same thing. Over the ocean, they measure ocean surface temperature. If there is no ocean surface -- that is, if it's ice covered -- temperature is not measured there, and that area doesn't get included in the average.
As global sea ice levels have declined, more nearly ice cold ocean has opened up, and those measurements get put into the average. That lowers the average anomaly a bit.
Correct for that effect, and the models and temps match even more closely.
Remember, talk about the paper. Attempts to deflect discussion with conspiracy theories will be reported as spam.
This paper points out the apples-and-oranges nature of models vs. temperature data.
Robust comparison of climate models with observations using blended land air and ocean sea surface temperatures - Cowtan - 2015 - Geophysical Research Letters - Wiley Online Library
Chemistry The University of York
An apples to apples comparison of global temperatures Climate Lab Book
The summary:
Models project near-surface air temperatures everywhere.
The global temperature averages don't measure the same thing. Over the ocean, they measure ocean surface temperature. If there is no ocean surface -- that is, if it's ice covered -- temperature is not measured there, and that area doesn't get included in the average.
As global sea ice levels have declined, more nearly ice cold ocean has opened up, and those measurements get put into the average. That lowers the average anomaly a bit.
Correct for that effect, and the models and temps match even more closely.
Remember, talk about the paper. Attempts to deflect discussion with conspiracy theories will be reported as spam.
