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That would be an easy check, to assess if global warming is caused by Sun cycles - as some say - rather than human activity. It would not provide a definite answer (unless ice caps are melting at similar rates on Mars and other celestial bodies), but definitely worth investigating. It is the very first step in any data science project - experimental design to rule out potential factors. And here, we are lucky to have a bunch of celestial bodies for testing. Is the Earth the only one warming up?

In short, could big data answers this basic question: are humans, or the Sun, or something else, or a combination, causing climate changes?

Who created this picture? I've found it on Facebook, posted by Reese Jones

So what is the answer? Is global warming also taking place on Mars?

Also, I believe it is the job of the data scientist to come up with such ideas (wondering if global warming is occuring also on Mars), find the appropriate data and test. It's indeed one of the most overlooked functions of the data scientist: good experimental design and seeking external data sources when necessary. Possibly more important than doing actual analyses.

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The most recent run-up on this chart, though starting from a low bottow, is the steepest one. The chart visually implies that we are back to normal, but another interpretation is that we are now on the steepest slope observed in 2,500 years.

The source of this chart is no mystery. Just google Cliff Harris and Randy Mann. This chart and their stuff are all over the web. I wonder if this chart is any good. I wonder if any of the information about climate change is any good. Experience has made me cynical. I doubt the climate change experts but at the same time I also think most of the deniers are nuts. Is there any good climate science out there?

It is an interesting diagram. The y-axis isn't labeled. The variation in the last three centuries is more due to better measurement and record keeping of course. I'd love to see the sources of the data. The speed at which the eruptions cause cooling is really interesting. There is a theory about the disappearance of the chariot, one of the longest existing military platforms in history. It appeared in 2400BCE and disappeared from inventory around 600 BCE. During that time period we see the severe weather that would have caused the droughts which formed the "Great Catastrophe" that wiped out the Egyptian Kingdom and making inefficient though culturally important symbols disappear. It's one thing to read it but in this diagram you can show it. It's a good start - more data sources, better labeling and more analysis would be great.

I was going to point that out, but realized I hadn't actually registered on the website yet. One of the things people should keep in mind is the way the data was captured over time isn't exactly in similar terms and far from precise. For example, how did they capture temperature data for 1100BC... indirectly through ice cores or some other ancient materials which are not accurate over shorter periods of time. None of which provide the same fidelity with respect to time as buoy 191 sitting off the coast of San Diego which can give water temperature data for every 30 minutes for the past 15+ years and meteorological data from another nearby station on 15 minute increments for howevern long that's been installed.

My point is, I think if we could go back in time and measure temperatures then as we can now, we'd find a lot more volatility in temperatures over much shorter periods of time that just can't be measured with ancient material samples.

By the way, I've also read articles a few years back that talked about how temeratures where increasing at the time on Venus. Scientists had figured out how to correlate temperature to how luminous Venus is at any given time. I also read another article even further back that had taken early records from Europe on sun spots and lined them up with Nile river flood levels and found there was a relation there as well.

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