What I find is interesting is looking at information not associated with climate change and seeing if that shows what is happening in terms of information which isn’t speculated on or adopted to suit one’s position. It’s probably the “purest” source of information especially when it’s been established not with the climate in mind but still can be looked at to see if things have changed.
One of the best examples, is the Auckland Mean Sea Level established in 1946 by a group of students from Auckland university. It’s used by surveyors as the starting point or datum for all the levels throughout the Auckland region for establishing the height of buildings, infrastructure (including the heights of manholes) above the MSL.
How it was established was that a mark was recorded on part of a wharf and every hour, the distance from that mark to the water level was read. Eventually, there was enough data to add another point called the Medium Sea Level. Since that time, surveyors and civil engineers have used the MSL as 0.00 height and their survey levels relate too how high fixed points and ground contours are above it. If you get a survey done establishing the ground contours, building levels and manholes, and it shows the Finished Floor Level of your house is 72.45 that means your house is 72.45m above the MSL established back in 1946.
Since the 1980’s, various electronic measuring devices have been used to measure the current MSL and to compare that make to the ne established in 1946.
While it wasn’t established as a way to study the climate, it can be used to see measure what has occurred since 1946.
Auckland’s mean sea level, measured at the wharf, has risen over 150mm since it was first established in 1946.
Where I find myself at odds with the extremists on climate change, is that although it’s a fact that the climate is changing, there isn’t anywhere that I can see which shows what the “ultimate” climate should be. Are we moving towards that….. or away from it? Is the whether events we’re experiencing now really that more extreme or have we altered the landscape so much through things like extensive farming, paving, roading etc that the impact of weather events is more extreme? Did the amount of moisture put into the air after the Tongan eruption cause more rain events and as things return to “normal”, will we see a reduction in the impact of rain events?