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How are mGal-smooth free-air gravity anomaly measurements made exactly? (tiny variations of acceleration on a bumpy airplane ride)

Free-air gravity anomaly measurements from Operation Icebridge aircraft are described in A fault-bounded palaeo-lake basin preserved beneath the Greenland Ice Sheet (open access). Question: These ...
4
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87 views
+100

What would be the depth variation of a “water ellipsoid” above a reference ellipsoid Earth?

The question If the Earth was a smooth spheroid how deep would be the ocean? has an excellent answer which explains the shape and surface area of an oblate spheroid before calculating the average ...
2
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71 views
+100

Can CO2 / greenhouse gas levels override the effects of milankovich cycles?

I understand that we are, in all likelihood, towards the end of an interglacial period (the holocene). What I'd like to know is, what has a stronger effect on global temperatures - the low point of ...