Results 221 to 230 of about 3,423,233 (292)

A 400‐Year Antarctic Ice‐Core Perchlorate Record Reveals Variability in Stratospheric Chlorine Chemistry

open access: yesGeophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Perchlorate (ClO4−) in polar ice preserves past chlorine oxidation chemistry; however, multi‐centennial Antarctic ClO4− records and the mechanisms controlling their variability remain poorly constrained. Here, we present the first 400‐year (1616−2016) ClO4− record from an Antarctic ice core, revealing two regimes separated around 1980.
Wenzhi Zhou   +6 more
wiley   +1 more source

Strong long-term variability in active galactic nuclei affects virial black hole mass measurements. [PDF]

open access: yesNat Commun
Amrutha N   +7 more
europepmc   +1 more source

10 recommendations for strengthening citizen science for improved societal and ecological outcomes: A co-produced analysis of challenges and opportunities in the 21st century. [PDF]

open access: yesPLoS One
Nunn JS   +17 more
europepmc   +1 more source

Strong gravitational lenses from the Vera C. Rubin Observatory. [PDF]

open access: yesPhilos Trans A Math Phys Eng Sci
Shajib AJ   +8 more
europepmc   +1 more source

Photometric detection at 7.7 μm of a galaxy beyond redshift 14 with JWST/MIRI. [PDF]

open access: yesNat Astron
Helton JM   +33 more
europepmc   +1 more source

A luminous and young galaxy at z = 12.33 revealed by a JWST/MIRI detection of Hα and [O iii]. [PDF]

open access: yesNat Astron
Zavala JA   +39 more
europepmc   +1 more source

Using JADES NIRCam photometry to investigate the dependence of stellar mass inferences on the IMF in the early universe. [PDF]

open access: yesProc Natl Acad Sci U S A
Woodrum C   +19 more
europepmc   +1 more source

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