Normal
'Near vertical from 1850' will depend on the X and Y axis of the charts used. Please remember 1850 was the bottom of the LIA, and we've potentially just naturally cycled up from that low point. We also inexplicably went through a cooling phase from 1940 to 1975 where industrial development went through the roof after WW2. Perhaps there's a time lag in CO2 and temperature.As far as going 'vertical', as you can see from the CET temperature record, it actually went way more vertical from 1700-1730. There's some dispute about that data but it seems to be the best record we have before more modern World temperature recording.Before the CET we just have to rely on ice cores and tree rings. The data we have from those shows some pretty vertical rises and falls, but it's hard to tell the time frames as they're so long scale and the data is from ice and trees. As you have pointed out we've been through some significant periods of ice age and recovery into warm periods. By all accounts we are coming towards the end of the Holocene interglacial. I'm not sure how humans are going to survive when most of the northern hemisphere inevitably becomes covered in ice. There's going to be a lot of migration to central Australia.Just about the only trusted temperature record I follow is the UAH satellite data, because I'm not sure if it can be tampered with or homogenised to cool the past. It's only young and might need to be upgraded at some point, but it's not really looking 'vertical' to me. I'm sure you could squish the X axis to make it look steeper. But even this data is starting from the bottom of a 30 year cooling period so you'd expect it to be going up.It sounds like the July temp, when it comes out, will be another spike up. Might get as high as 2016. [ATTACH=full]160377[/ATTACH]
'Near vertical from 1850' will depend on the X and Y axis of the charts used. Please remember 1850 was the bottom of the LIA, and we've potentially just naturally cycled up from that low point. We also inexplicably went through a cooling phase from 1940 to 1975 where industrial development went through the roof after WW2. Perhaps there's a time lag in CO2 and temperature.
As far as going 'vertical', as you can see from the CET temperature record, it actually went way more vertical from 1700-1730. There's some dispute about that data but it seems to be the best record we have before more modern World temperature recording.
Before the CET we just have to rely on ice cores and tree rings. The data we have from those shows some pretty vertical rises and falls, but it's hard to tell the time frames as they're so long scale and the data is from ice and trees. As you have pointed out we've been through some significant periods of ice age and recovery into warm periods. By all accounts we are coming towards the end of the Holocene interglacial. I'm not sure how humans are going to survive when most of the northern hemisphere inevitably becomes covered in ice. There's going to be a lot of migration to central Australia.
Just about the only trusted temperature record I follow is the UAH satellite data, because I'm not sure if it can be tampered with or homogenised to cool the past. It's only young and might need to be upgraded at some point, but it's not really looking 'vertical' to me. I'm sure you could squish the X axis to make it look steeper. But even this data is starting from the bottom of a 30 year cooling period so you'd expect it to be going up.
It sounds like the July temp, when it comes out, will be another spike up. Might get as high as 2016.
[ATTACH=full]160377[/ATTACH]
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