copy of text sent last hour as a comment to A Displaced Polar Vortex and Its Causes, wattsupwiththat 2014/02/01
”The Earth’s circumference at the equator is about 40 076,592 km. Nearly 40 009 km if we measure the circumference from pole to pole. Hence, it is flattened at the poles due to centrifugal force, the water cycle, erosion of various kinds from vulcanos on land and in sea needs to be taken into consideration when calculating the impact of each periods saltination in sea especially in areas south and south east of Alaska.
One other important factor is that Earth’s axis tilt, oblikvidity varies in relation to our Earth’s rotation between 22.1 and 24.5 degrees. A factor forgotten (?) by many scholars still believing in human caused Global warming….
A third important factor never taken into consideration in any of the so called computermodels is that Vulcanos on land due to the fact mentioned above, in other words that our globe isn’t an ideal sphere, has had large impacts on stofts in ‘air’ and athmosphere.
For more reading on impacts such as large numbers (millions) of deaths from Iceland to China as well as impact on photosyntesis in plants causing crop failure in other words bad harvest, please read: Alexandra Witze & Jeff Kanipe, An Island on Fire: The extraordinary story of Laki, the vulcano that turned eighteen century Europe dark, Profile Books 2014.
Our Earth has a complexed weather system especially observed in the Arctic. One need to take all windfactors as well as eruptions, erosions of different kind, seastreams into consideration,
not forgetting that the main factor behind all observed correct data as well as the so called temperature changes observed by satelites into consideration, the later never ever gives correct information of temperatures 1 meter above surface nor 1 meter under. Reflexion isn’t the same as correct temperature. Never been and never will be.
* More than 70% of Earth’s surface is water. Oceans, lakes, rivers, rivers, streams, etc.
* Impacts on landrise and sea levels still is seen caused by the last ice age. Please remember that Archimedes principle applies whether we are dealing with glaciers (which weigh down the land under) same goes for ice in the Arctic (floating in the ‘sea’) or ice and glaciers in the example Antarctica where there are both ice as ice on land.
* Sea surface NEVER can be presented as a fixed figure. When science talks about sea level we are dealing with averages over a long period, at least one year, comparing the highest and lowest value during the day. Never ever forget the moon’s attraction on the water!
Facts about Earth, swedish text
Important knowledge:
Working with sediment cores extracted from Lower Murray Lake, Ellesmere Island, Nunavut, Canada (81°21′N, 69°32′W) in 2005 and 2006, the authors calculated annual mass accumulation rate (MAR) for the past five millennia, which they used to derive a relationship between MAR and July temperature at the two nearest permanent weather stations over the period of instrumental measurements. This work revealed there were several periods over the past 5000 years when the temperature of the region exceeded the peak temperature of the 20th century, the most recent of which was during the Medieval Warm Period, which we have delineated on the following figure as occurring between about AD 930 and 1400, and where the peak temperature of that period can be seen to have been about 0.6°C higher than the peak temperature of the Current Warm Period.
Source:
Cook, Bradley, Stoner and Francus, P. 2009. Five thousand years of sediment transfer in a high arctic watershed recorded in annually laminated sediments from Lower Murray Lake, Ellesmere Island, Nunavut, Canada. Journal of Paleolimnology 41: 77-94.
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