To those concerned about the potential for bias in the 5 major temperature datasets, I personally rely on the ones that require the least 'adjustments': Argo bouys for ocean temp, and balloons and satellites for the atmosphere.
Of course these all still have some adjustments made, but far less than the land based thermometers and ocean 'bucket' temp readings and are certainly more accurate than most proxies (tree rings etc) as far as I can tell. Most of the data is freely available.
Argo data is very hard to come by though. You have to personally request it from the Argo Centre themselves or (like I did) find studies that managed to get ahold of the data, like these guys:
http://www.pas.rochester.edu/~douglass/papers/KD_InPress_final.pdf
This, like a lot of peer reviewed studies, actually indicates that extra heat has not gone into the oceans. Argo bouys are largely regarded as the most accurate ocean temperature readings from 700m to 2000m, and heat doesn't sink as far as my understanding of the laws of thermodynamics go.
It bothers me that the conversation is not changing based on the newest data. People are still committed to the idea of a need to mitigate catastrophic warming, including many influential people such as the leaders of most nations.
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