Tootfinder

Multiple Scattering Effects in Noctilucent Clouds: Numerical Estimation and Application to Altitude and Particle Size Measurements
Oleg S. Ugolnikov
https://arxiv.org/abs/2509.04120

Multiple Scattering Effects in Noctilucent Clouds: Numerical Estimation and Application to Altitude and Particle Size Measurements
The simple 3-D radiative transfer model in the atmosphere of the Earth is built for numerical comparison of direct solar radiation and limb scattering background at the definite layer during the deep twilight period at the middle and upper atmosphere. This allows finding the contribution of multiple scattering in the field of high-altitude clouds such as polar stratospheric and noctilucent clouds. This is the factor that can influence the results of altitude and microphysical study of the parti…

"Air temperatures over Antarctica have soared 35ºC above average. What does this unusual event mean for Australia?"
#Australia #Antarctica #Climate

Air temperatures over Antarctica have soared 35ºC above average. What does this unusual event mean for Australia?
The stratospheric polar vortex high above Antarctica has rapidly heated up. These sudden bursts of heat can bring rapid weather changes in Australia

❄️ It’s freezing cold outside here in Germany, and this is an interesting explainer of why that is: a warming event in the polar region is leading to an early collapse of the polar vortex, so Europe and North America are flooded with cold air, while the North Pole is unusually warm. #weather #climate

Stratospheric Warming Watch: Polar Vortex Collapse has begun, with cold air and snowfall impacts expected
A Stratospheric Warming is now collapsing the Polar Vortex, with polar air and snow forecast across the United States, Canada and Europe in December

Mapping the Cloud-Driven Atmospheric Dynamics & Chemistry of an Isolated Exoplanet Analog with Harmonic Signatures
Michael K. Plummer, Francis P. Cocchini, Peter A. Kearns, Allison McCarthy, \'Etienne Artigau, Nicolas B. Cowan, Roman Akhmetshyn, Johanna Vos, Evert Nasedkin, Channon Visscher, Bj\"orn Benneke, Ren\'e Doyon, Stanimir A. Metchev, Jason F. Rowe, Genaro Su\'arez

Mapping the Cloud-Driven Atmospheric Dynamics & Chemistry of an Isolated Exoplanet Analog with Harmonic Signatures
Young planetary-mass objects and brown dwarfs near the L/T spectral transition exhibit enhanced spectrophotometric variability over field brown dwarfs. Patchy clouds, auroral processes, stratospheric hot spots, and complex carbon chemistry have all been proposed as potential sources of this variability. Using time-resolved, low-to-mid-resolution spectroscopy collected with the JWST/NIRISS and NIRSpec instruments, we apply harmonic analysis to SIMP J0136, a highly variable, young, isolated plane…

"Abnormally hot days may hit Australia’s south-east after rare sudden warming over Antarctica"
#Australia #Climate #ClimateChange

Shortwave Absorption by Alumina Aerosol Amplifies Stratospheric Warming
Taveen Singh Kapoor, Prabhav Upadhyay, Jian Huang, Guodong Ren, John Cavin, Dhruv Mitroo, Joshin Kumar, Jordan A. Hachtel, Lu Xu, Rohan Mishra, Rajan K. Chakrabarty
https://arxiv.org/abs/2509.24246

Shortwave Absorption by Alumina Aerosol Amplifies Stratospheric Warming
Stratospheric alumina aerosols from rocket launches and geoengineering proposals are presently understood to help counteract greenhouse gas-induced warming by reflecting sunlight and cooling the lower atmosphere. Here, from direct measurement of aerosol absorption cross-sections, we report alumina's hitherto unknown shortwave absorption characteristics. Alumina's shortwave absorption could offset up to 10\% of its solar-reflective cooling, and if implemented for geoengineering, would warm the s…

FIELDMAPS Data Release: Far-Infrared Polarization in the "Bones" of the Milky Way
Simon Coud\'e, Ian W. Stephens, Philip C. Myers, Nicole Karnath, Howard A. Smith, Andr\'es Guzm\'an, Jessy Marin, Catherine Zucker, B-G. Andersson, Zhi-Yun Li, Leslie W. Looney, Giles Novak, Thushara G. S. Pillai, Sarah I. Sadavoy, Patricio Sanhueza, Archana Soam

FIELDMAPS Data Release: Far-Infrared Polarization in the "Bones" of the Milky Way
Polarization observations of the Milky Way and many other spiral galaxies have found a close correspondence between the orientation of spiral arms and magnetic field lines on scales of hundreds of parsecs. This paper presents polarization measurements at 214 $μ$m toward ten filamentary candidate ``bones" in the Milky Way using the High-resolution Airborne Wide-band Camera (HAWC+) on the Stratospheric Observatory for Infrared Astronomy (SOFIA). These data were taken as part of the Filaments Ext…

Scheduling follow-up observations of energetic transients with the neutrino target scheduler (NuTS)
Tobias Heibges, Claire Gu\'epin, Luke Kupari, Hannah Wistrand, Randy Lahm, Johannes Eser, Mary Hall Reno, Tonia M. Venters, Lawrence Wiencke
https://arxiv.org/abs/2509.13844

Scheduling follow-up observations of energetic transients with the neutrino target scheduler (NuTS)
Space missions offer unique opportunities for studying ultra-high-energy (UHE) cosmic rays and neutrinos by leveraging secondary emissions generated by extensive air showers (EAS) resulting from their interactions with the atmosphere or Earth's crust. Detecting UHE neutrinos associated with transient sources holds great potential for unraveling the origins of UHE cosmic rays and the physical processes driving their production. Stratospheric balloon missions, illustrated recently by the Extreme …

Glow discharge induced reactions in mixtures of ozone and chlorodifluoromethane with atmospheric gases
Alexander Dorn, Haydar Mutaf, Recep Orhan, Wania Wolff, Thomas Pfeifer, Haji Ahmedov
https://arxiv.org/abs/2509.11302

Glow discharge induced reactions in mixtures of ozone and chlorodifluoromethane with atmospheric gases
The influence of extraterrestrial particles like cosmic radiation (CR) on the chemistry and ozone density in the Earth stratosphere is not well investigated and normally neglected in stratospheric chemistry models. Here we present the commissioning of a lab-based apparatus which aims at simulating conditions in the stratosphere in order to get better insight into the reactions induced by the secondary-particle showers from high-energetic CR which can reach low altitudes. Admixtures of ozone and…

Using SOFIA's EXES to search for C$_6$H$_2$ and C$_4$N$_2$ in Titan's atmosphere
Zachary C. McQueen, Conor A. Nixon, Curtis de Witt, V\'eronique Vuitton, Panayotis Lavvas, Juan Alday, Nicholas A. Teanby, Joseph Penn, Antoine Jolly, Patrick G. J. Irwin
https://arxiv.org/abs/2509.19127

Using SOFIA's EXES to search for C$_6$H$_2$ and C$_4$N$_2$ in Titan's atmosphere
In Titan's atmosphere, the chemistry of small hydrocarbons and nitriles represent an important link from molecular species to the ubiquitous organic haze that gives Titan its characteristic yellow color. Here we present a new search for two previously undetected molecules, triacetylene (C$_{6}$H$_{2}$) and the gas phase dicyanoacetylene (C$_{4}$N$_{2}$), using the Echelon-Cross-Echelle Spectrograph (EXES) instrument aboard the SOFIA (Stratospheric Observatory For Infrared Astronomy) aircraft. W…