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Post by Ratty on Sept 22, 2020 4:15:14 GMT
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Post by nautonnier on Sept 26, 2020 12:07:05 GMT
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Post by nautonnier on Sept 26, 2020 12:18:25 GMT
Comments anyone?
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Post by acidohm on Sept 26, 2020 13:43:04 GMT
So far these cold temps have not manifested themselves in Europe.
US had cold last year and year before??
If anything, during winter low pressure has been prevalent over Greenland, Europe has had high pressure approximately over UK-ish which for us has led to protracted grey, boring cool weather....really really boring.
For Northern Europe, I think stratospheric polar vortex stability and blocking are key and as yet are unperturbed by cold Greenland.
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Post by missouriboy on Sept 27, 2020 21:19:05 GMT
There are some who believe that it could be happening now. Could the Sahara ever be green again?www.livescience.com/will-sahara-desert-turn-green.htmlWhat's interesting to climate scientists about the Green Sahara is how abruptly it appeared and vanished. The termination of the Green Sahara took only 200 years, Johnson said. The change in solar radiation was gradual, but the landscape changed suddenly. "It's an example of abrupt climate change on a scale humans would notice," she said. |
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Post by nautonnier on Sept 28, 2020 10:14:50 GMT
There are some who believe that it could be happening now. Could the Sahara ever be green again?www.livescience.com/will-sahara-desert-turn-green.htmlWhat's interesting to climate scientists about the Green Sahara is how abruptly it appeared and vanished. The termination of the Green Sahara took only 200 years, Johnson said. The change in solar radiation was gradual, but the landscape changed suddenly. "It's an example of abrupt climate change on a scale humans would notice," she said.Sounds like the Chaotic weather systems have a 'wet northern Africa' attractor. Weather patterns seem to have been flickering that way for a few years now with 'snow in the Sahara' and other similar incidents in the Middle East. Perhaps the desert kingdoms will suddenly become fertile again. That would have a huge geopolitical impact. |
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Post by nautonnier on Sept 28, 2020 12:47:27 GMT
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Post by Ratty on Sept 28, 2020 13:02:28 GMT
What begins? 
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Post by nautonnier on Sept 28, 2020 13:11:57 GMT
What begins? Early Northern Hemisphere snow is I believe the point as it is still September. |
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Post by nautonnier on Oct 1, 2020 14:38:32 GMT
 "Italy experiences the coldest September in 50 years – with snowfall
Over the past weekend, temperatures in Italy plunged suddenly by between 10 and 15 degrees, resulting in the country’s coldest September in 50 years and leading to snowfalls much earlier than usual, Italian media reports.
The cold has been particularly intense in Milan and Turin which recorded 5°C and 4°C degrees respectively on the night of Sunday 27 September.
Temperatures also dropped steeply elsewhere – to below 10°C degrees in Tuscany – while hill towns in the central Lazio area witnessed snow over the weekend."More here> wattsupwiththat.com/2020/10/01/italy-experiences-the-coldest-september-in-50-years-with-snowfall/I think that the North African coast temperatures are also of significance |
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Post by nautonnier on Oct 1, 2020 20:41:22 GMT
"Earth’s Oceans Used To Be 20-25°C Warmer Than They Are Today
Today’s global ocean temperatures hover around 15°C on average. About 400 to 500 million years ago, Earth’s ocean temperatures averaged 35-40°C and atmospheric CO2 concentrations were “5-10x higher than present day values” (Henke et al., 2018). During this period, the marine biosphere thrived (Voosen et al., 2019)."More here: notrickszone.com/2020/10/01/earths-oceans-used-to-be-20-25c-warmer-than-they-are-today/
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Post by nautonnier on Oct 8, 2020 17:40:40 GMT
OK so the surface air temperature is used a global warming/climate change index. But the air temperature of a volume of the atmosphere is an intensive variable that not only depends on the energy of all the molecules it also depends on the humidity of the air its water content. See www.engineeringtoolbox.com/enthalpy-moist-air-d_683.html There are many others. So 100% humid air at 75F (imagine a misty Louisiana bayou) can hold twice as much energy as a similar volume of 0% humid air at 100F say in Death Valley. The temperatures being quoted as hotter/colder colloquially do not mean that there is more/less energy in those volumes of air it is not possible to know without knowing the humidity in which case you can calculate the energy content in Kilo Joules per Kilo Gram (Kj/Kg) The entire surface temperature change could be due to an enthalpy change with changes in humidity. The energy content of a volume of air can go DOWN and if the humidity also reduces the air temperature can go UP. This seems to be first a way of saying - you have been measuring the wrong variable from a pure physics point of view and secondly perhaps if the humidity values are available the real energy content could be calculated. It may show that the energy content of the atmosphere is reducing and AGW/Climate Change is based on use of the wrong metric. Any comments? |
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Post by missouriboy on Oct 8, 2020 19:07:27 GMT
OK so the surface air temperature is used a global warming/climate change index. But the air temperature of a volume of the atmosphere is an intensive variable that not only depends on the energy of all the molecules it also depends on the humidity of the air its water content. See www.engineeringtoolbox.com/enthalpy-moist-air-d_683.html There are many others. So 100% humid air at 75F (imagine a misty Louisiana bayou) can hold twice as much energy as a similar volume of 0% humid air at 100F say in Death Valley. The temperatures being quoted as hotter/colder colloquially do not mean that there is more/less energy in those volumes of air it is not possible to know without knowing the humidity in which case you can calculate the energy content in Kilo Joules per Kilo Gram (Kj/Kg) The entire surface temperature change could be due to an enthalpy change with changes in humidity. The energy content of a volume of air can go DOWN and if the humidity also reduces the air temperature can go UP. This seems to be first a way of saying - you have been measuring the wrong variable from a pure physics point of view and secondly perhaps if the humidity values are available the real energy content could be calculated. It may show that the energy content of the atmosphere is reducing and AGW/Climate Change is based on use of the wrong metric. Any comments? So, IF the huge quantities of precipitation we have been seeing along the edges of the jet stream(s) (both southward and northward) are resulting in a slightly drier troposphere overall (don't think we have any measurements that would definitively show that one way or the other), then UAH global temperature metric, which has been bouncing around between slightly higher to slightly lower for the last few months, could THEORETICALLY be due to a drying troposphere? |
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Post by nautonnier on Oct 8, 2020 19:22:03 GMT
Or the large number of 'droughts' leading to reduced lower-troposphere humidity would also lead to increased lower-troposphere temperatures without any change in the energy content of the air.
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Post by acidohm on Oct 8, 2020 19:41:31 GMT
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