More of the same cherry picking that has been making the rounds on the blogsphere and been thoroughly debunked. 1998 was the strongest el nino on record, and strong el nino’s transfer heat from the oceans to the air which raises the temperature for that year.
Due to the very strong el nino 1998 tied for the warmest year on record, but 1997 and 1999 without the el nino were much cooler. Instead of doing a proper trend line “skeptics” simply cherry pick 1998 and say “look” temperatures haven’t gone up! If you choose 1997 or 1999 as your starting point however, you get a completely different result.
The correct way is to plot a correct trend line instead of using individual years as your starting points. This gets around the fact that individual years can be as much as 0.5 deg C higher or lower then the trend which makes it impossible to see what the trend really is over the period as short as 10 years. Here is the trend line from 1979 – 2007
More of the same cherry picking that has been making the rounds on the blogsphere and been thoroughly debunked. 1998 was the strongest el nino on record, and strong el nino’s transfer heat from the oceans to the air which raises the temperature for that year.
Due to the very strong el nino 1998 tied for the warmest year on record, but 1997 and 1999 without the el nino were much cooler. Instead of doing a proper trend line “skeptics” simply cherry pick 1998 and say “look” temperatures haven’t gone up! If you choose 1997 or 1999 as your starting point however, you get a completely different result.
The correct way is to plot a correct trend line instead of using individual years as your starting points. This gets around the fact that individual years can be as much as 0.5 deg C higher or lower then the trend which makes it impossible to see what the trend really is over the period as short as 10 years. Here is the trend line for monthly temperature anomaly from 1979 – 2007
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