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| Fig. 1a Constant Ocean Mass & Volume |
I. I Repeat Myself
I reread Church, White (2011) (PDF) in light of the post concerning the inconsistent calculations of thermosteric sea level change (thermal expansion / contraction).
Like others who were mystified by "the European problem" they flounder, because they do not mention, let alone understand, the gravity of ice sheets (The Gravity of Sea Level Change, 2, 3, 4).
Therefore, neither do they comprehend the Dredd Blog discussions of the phenomenon of ghost water (The Ghost-Water Constant, 2, 3, 4, 5, 6, 7, 8, 9).
Go figure (these guys still haven't discovered gravity: On the rate and causes of twentieth century sea-level rise, PDF).
II. But I Fulfill (Most of) My Promises
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| Fig. 1b Variable Ocean Mass & Volume |
"In future posts I will use the same PSMSL tide gauge stations that the authors in journal papers used in their papers, in order to further expand upon the concepts addressed in today's post."(On The More Robust Sea Level Computation Techniques). In the paper Church, White (2011) they used 491 PSMSL tide gauge station data ("We use ... data ... from ... PSMSL" p. 587), so, that seems like a tall order.
Not to worry, Fig. 1a and Fig. 1b are graphs using the same 491 PSMSL tide gauge stations that they used, excluding "metric" data (I don't use the "Metric" data, as recommended by PSMSL here).
III. The Same Old Story Emerges
Their selection of PSMSL data does nothing to change the reality that if you do not discuss ice sheet gravity dynamics, you don't get it (see Mitrovica video below).
The graphs I provided here (where I made, and today fulfilled, a promise) shout out the same message as today's graphs do (Fig. 1a, Fig. 1b).
That message is the message shouted out for all that consider the four corners of the scenario, which is to say that the assertion indicating "thermal expansion is the main cause of sea level rise in the 19th and 20th centuries" is not supported by robust analysis (On Thermal Expansion & Thermal Contraction, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21).
IV. Conclusion
According to Dr. Mitrovica, a lot of the fault for the problem discussed in this series is the obsession with the mythical bathtub model (The Bathtub Model Doesn't Hold Water, 2, 3, 4).
The next post in this series is here, the previous post in this series is here.
Professor Jerry Mitrovica, Harvard University:
Adios Grace 1 & 2!
ReplyDelete"This data revolutionized entire disciplines, such as hydrology, allowing scientists to document the loss of groundwater due to human exploitation. GRACE showed that the melting polar ice sheets are contributing more to sea level rise than the demise of mountain glaciers. Greenland, it found, is losing 280 gigatons of ice a year on average, while Antarctica is shedding 120 gigatons—rates that both seem to be accelerating. GRACE also inspired a similar mission, NASA’s Gravity Recovery and Interior Laboratory, which probed the moon’s interior."
http://www.sciencemag.org/news/2017/09/satellites-measuring-earth-s-melting-ice-sheets-go-dark
They had a hand in confirming the 'ghost water.'
Hi Mark,
Delete"They had a hand in confirming the 'ghost water.'
Indeed : "Melting ice sheets in Greenland and Antarctica are pouring water into the oceans and adding to sea level rise. But the lost ice also means lost gravity—and so sea levels in the immediate vicinity of the ice sheets actually drop, while ocean levels half a world away are goosed." - (your link)
Anymore when I read a peer-reviewed published paper on sea level change I first do a global search for the word "gravity" ... if it is not in that paper they are still living in a world of pre-newton science.