Alan Cannell

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Questions related from Alan Cannell

Has anyone done any work on the cosmogenesis of the heavier atmospheric isotopes of 18O and 15N?

The data record suggests that this process is higher than thought during X Class flares, but this seems to be an area of research not yet covered.

03 July 2025 2,852 0 View

How does air pressure affect C13 fractionation at the ocean interface?

Box models such as Geocarbsulf (2006) indicate that the mass of O2 has changed over geological time and Johnson & Goldblatt note in their EarthN model that N2 has also not been constant; thus...

13 December 2022 7,736 1 View

How does air desnity affect wind velocity profiles?

I would imagine that at higher density shear makes the profile more vertical?

14 July 2020 3,912 10 View

Do accumulation rates of foraminifera calcite (limestone/chalk) vary from the Jurassic to Cretaceous or Miocene to Pliocene?

Is there a relation between accumulation rates and carbonate ions (CO3-) in sea water, such that in higher acidity seas there is a greater productivity of calcites and thicker deposits over...

21 February 2020 1,586 4 View

For an Earth like planet with similar atmospheric composition, but a higher surface patm of 1.6 bar, how would this affect the escape of N and O?

Escape velocity for a gas is inversly proportional to the root of the distance from the centre of gravity, thus at a higher surface patm (1.6 bar) the outer atmosphere will be both further away...

18 July 2019 5,700 0 View

Suggestions for publishing a short outline or conference paper of the N2 essay?

Hi I am pleased to see that the topic of Ns isotopes as markers of atmospheric changes (Giant Bugs, Martian Air etc.) has attracted some attention - especially over the past weeks. A couple of...

14 November 2018 5,098 0 View