The last two days in Auckland have been very warm days. There were a few wisecracks around it being global warming. The ‘official’ temperature in Auckland was around 29 degrees. But hang on a minute. It was 31° in Botany and only 28° in Piha. So is 29° an average? No, there is only one recording place. So there were large areas of Auckland that were not 29°. Could 29° be categorised as ‘an average’ for Auckland? We could try but it would not be accurate. We don’t know which areas were 31° and which were 29°. We don’t know how big those areas were. Some places may have been 27°. Some temperatures were recorded at midday others at 3.00pm. Recording temperature is problematic, nigh impossible.
OK, so what if we take one spot and record the temperature every day at exactly the same time wouldn’t that give us a pattern over time? Yes, but what pattern? Take Botany. Fifty years ago it was open fields. Now it’s all tin roofs, tarseal and concrete. That would distort the pattern.
So let’s take Botany out and use the other recordings around Auckland. Piha might work but Auckland City is also distorted by growing urbanisation. For historical accuracy, using temperature recordings in Auckland is well-nigh useless.
Who cares? Who can ‘feel’ a one-degree change in temperature anyway? Not too many people I guess but a degree difference in global warming land is massive. In the rarefied atmosphere of global warming a tenth of a degree is hugely statistically significant.
Over the last month the climate change enthusiasts have been crowing about 2015 being the hottest year on record. It broke the record by 0.02° F. Wow! One fifth of one tenth of one degree. Did you feel that? Take your shirt off? Read more »