New papers on Other earth science
3 new papers on other earth science in the last 7 days, within Earth & climate. These are the 3 Pipette rates most worth reading, with the main result in the authors' own words.
The best of the week
Nitrogen and intramolecular carbon isotopic measurements of β-alanine in samples from asteroid Bennu and the Murchison meteorite
These differences are difficult to reconcile with recognized parent-body processes and suggest that nitrogen and intramolecular carbon isotopic measurements could provide direct geochemical evidence for spatial heterogeneity in organic synthesis across the protoplanetary disk and new constraints on the chemical environments and precursor reservoirs that gave rise to extraterrestrial amino acids.
Peer-reviewed journalBold claims, read criticallyDetermination of Physical Height Differences from Time Transfer via the ACES Mission -- A Simulation Study
The results show that optical links enable faster convergence and can achieve height accuracies at the decimeter level within a few days and at the centimeter level over longer periods, while microwave links are more strongly affected by noise and bias contributions.
PreprintA Survey of Electron Anisotropies in the Magnetosphere: Dependence on Solar Wind Pressure and Kp
Using 161,300 3-s resolution electron measurements from THEMIS A and D, we find that field-aligned anisotropies are most prominent at low energies (30--200 eV) and occur over nearly all and MLT, with the largest values concentrated in the dayside/postnoon plasmasphere, while perpendicular anisotropies dominate at higher energies (1--30 keV) and are largest and most probable in a narrower band from 5--10 with a pronounced dayside/prenoon bias.
Preprint