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Post by woodstove on Mar 22, 2009 2:16:54 GMT
I may have made a mistake, Kiwi.
I took your "inadmissible" to be directed toward Maui's description of the sea in Hawaii.
Perhaps you were referring to Willis 2008?
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Post by kiwistonewall on Mar 22, 2009 2:46:04 GMT
(I wasn't replying to Maui - only making a general comment about the thread's topic! ;D)
I was meaning that all sea level changes in the order of a few mm/year are inadmissible in scientific terms. (IMHO)
We know that sea levels do go up and down over time, but the changes are usually so small when compared with the weather/wind changes to the normal tides, that nothing can be deduced with any certainty.
It gets down to opinions, assumptions and adjustments. That is why there are so many different estimates of the global sea rise.
The reality is that sea level hasn't changed significantly for thousands of years (as the NIWA website used to say, and maybe still does if I ever find that page again.)
Of course, there are many active geological areas, plates tipping (East England is sinking), land still recovering form the last ice age, and volcanic activity.
Over a few centuries of observations, we may be able to sort it all out. The political science of today is only going to obscure our understanding.
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Post by kiwistonewall on Mar 22, 2009 7:21:31 GMT
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Post by Maui on Mar 22, 2009 15:17:31 GMT
From USGS Hawaii Volcano Observatory March 1, 2009
"...Yesterday, CD officials reported a sizeable bench collapse at the Waikupanaha ocean entry, timing was estimated at around 1:30 pm by a visitor who had witnessed part of the collapse from the safety of a helicopter tour; the collapse almost certainly produced the seismic tremor bursts recorded between 1 and 1:30 pm...GPS stations spanning the crater (less sensitive than tiltmeters) have recorded about 1.5 cm of contraction over the past month and more than 5 cm over the past 3 months."
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Post by Maui on Mar 22, 2009 15:24:47 GMT
I posted this in the open forum, but got no responses. "Hap" Mcsween emailed me with a non-answer.
Pardon me if I do not know some fundamental law of physics, but is it not possible that some of the water on Earth or Mars falls from space, either as catastrophic events or on a regular basis? Thanks for helping me before I email the author...
This is inspired by a "News and Views" item in this week's Nature 458, 5 March, 2009, p. 45; "Volatility in Martian Magmas," by Harry McSween, Knoxville. It is a discussion of Filiberto and Trieman's report in Chemical Geology about chlorine replacing water as a magma volatile. Mcsween states:
"But to my mind it is doubtful that magma borne chlorine would dominate on Mars. The channels and valley networks on Mars were surely eroded by water, and magmas must have delivered that water to the surface."
Now, why can't it be considered that Mars has catastrophic floods from meteoric sources? Indeed, from what I have seen of volcanoes in Hawaii, they are a lot better at putting out rock than water. Also, I recall reading about cosmic snowballs that were destroyed by Earth's magnetic field, and it is my understanding that Mars does not have this protection...
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Post by enough on Mar 24, 2009 0:07:27 GMT
If the reference in the first post can be believed, the sea level was 3 meters higher over a period before the Little ice Age
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Post by Ratty on Mar 24, 2009 5:28:38 GMT
Speaking of sea levels, perhaps this might have some effect on sea level: ... as well as tectonic activity in other parts of the globe, sedimentation, etc. If the current seismic activity off Tonga causes a rift and islands disappear, I expect climate change will be blamed.
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Post by gahooduk on Mar 31, 2009 17:34:23 GMT
[/quote] ;D If the reference in the first post can be believed, the sea level was 3 meters higher over a period before the Little ice Age[/quote] well London Thames barrier will work for longer as sea has not risen as expected news.bbc.co.uk/1/hi/england/london/7973623.stmon BBC local London News 5Pm GMT wonder why it has not risen ;D ;D ;D
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Post by climasol on Mar 31, 2009 19:28:27 GMT
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