Planet earth is billions of years old and we know for sure it has changed temperatures many times all on its own even before man was made let alone man made. Trying to draw conclusions from a 40 year period in time is like trying to diagnose an 85 year old patient on a sneeze.
That chart is over 130 years, which is the only period for which we have accurate temperature measurements.
And it's only the last 40 or so that's showing more than average above the mean. The 90 years before that are all over the place with some highs and some lows.
But that would always be the case because the mean includes the last 40 years. It’s the trend that’s the relevant part (although I accept we don’t know what the trend line looked like before 130 years ago)
Yes, and what that means is that generally the trend for the first 90 years was slightly up, before a more significant and obvious increase from the mid 80's onwards. And this is the mean temperature for the UK which has increased 1.2c in 40 years. For a temperate climate like ours, with moderate temperature extremes, it doesnt seem like a big deal, but then we don't get to see mountains losing their snowy peaks, or ancient settlements unearthed as lakes reach historic lows, but 5 of our hottest 7 days on record have happened in the last 10 years. The earth may have "changed temperature on its own" before but the overwhelming majority of scientists think we're ****ing it up now, and they tend to be able to back that up with evidence, as opposed to the contrarians who shrug it off because they once saw picture of a woolly mammoth in a childrens book
that'll disappoint the ice-core extractors. they reckon we haven't fully emerged from the last ice age.
You'd also have to look into the detail on what is actually behind those figures...and yes, I have looked into it and also read the alternative views.
1. That's not quite as clear cut as your claim implies. 2. The claim is certainly challengeable, as among other issues, it only relates to published articles, and scientists researching alternative hypotheses rarely get funding, and therefore rarely get published or followed up on. It's worth digging beyond the IPCC reports, and looking at the actual scientific data they draw from. Even ignoring all of the above, many of the very expensive 'remedies' are liable to have little impact, and some may make it worse, or create other issues themselves.
Is that graph (produced by scientists) of temperature records? How many of those temperatures are hotter than the past 10 years?
