Results 81 to 90 of about 88,907 (241)

Impact of Land Use Change and Drought on the Net Emissions of Carbon Dioxide and Methane From Tropical Peatlands in Southeast Asia

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Peat decomposition is progressing in Southeast Asia due to lowered groundwater levels (GWL) caused by drainage. Additionally, droughts during El Niño events significantly lower the GWL, the main environmental factor that controls greenhouse gas (GHG; carbon dioxide (CO2) and methane) emissions in peatlands.
Takashi Hirano, Tomohiro Shiraishi, Ryuichi Hirata, Masato Hayashi, Chandra Shekhar Deshmukh, Lulie Melling, Bettycopa Amit, Masayuki Itoh, Tomomichi Kato, Frankie Kiew, Sofyan Kurnianto, Kitso Kusin, Nardi Nardi, Nurholis Nurholis, Tiara Nales Nyawai, Elisa Rumpang, Ayaka Sakabe, Ari Putra Susanto, Joseph Wenceslaus Waili, Guan Xhuan Wong   +19 more
wiley   +1 more source

IC 4200: a gas-rich early-type galaxy formed via a major merger

, 2006
We present the result of radio and optical observations of the S0 galaxy IC 4200. We find that the galaxy hosts 8.5 billion solar masses of HI rotating on a ~90 deg warped disk extended out to 60 kpc from the centre of the galaxy.
Morganti, R., Oosterloo, T. A., Serra, P., Trager, S. C., van der Hulst, J. M.   +4 more
core   +1 more source

Redefining SAR Arc Generation: The Competing Roles of Magnetospheric and Ionospheric Energy Injection

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Stable auroral red (SAR) arcs are luminous subauroral emissions produced by the collisional excitation of oxygen atoms during geomagnetically active times. While traditionally attributed to inner magnetospheric electron heating, recent observations and simulations challenge the exclusivity of this mechanism.
Jing Liu, Wenbin Wang, Jun Liang, Libo Liu, Carlos Martinis, Joei Wroten, Yongliang Zhang, Yao Chen, Tianyu Cao, Yifan Lu   +9 more
wiley   +1 more source

The South African Astronomical Observatory [PDF]

Topics discussed in the Overview of Year 1988 include the following: Supernova in the Large Magellanic Cloud; Galaxies; Ground based observations of celestial x ray sources; the Magellanic Clouds; Pulsating variables; Galactic structure; Binary star ...

core   +1 more source

A New Classification of In Situ and Anvil Cirrus Clouds Uncovers Their Properties and Interhemispheric Connections

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract The challenge of distinguishing convective anvil cirrus from in situ cirrus has long limited the quantification of their distinct roles in regulating upper‐tropospheric moisture and modulating Earth's energy budget. In this study, we address this ambiguity by introducing a physically constrained classification framework that applies advanced ...
Qingyu Mu, Jinming Ge, Jianping Huang, Xiaoyu Hu, Nan Peng, Yize Li, Meihua Wang, Jie Zhang, Ziyang Xu, Chi Zhang, Bochun Liu   +10 more
wiley   +1 more source

Polar Motion Dynamics on Slow‐Rotating Venus: Signatures of Mantle Flow

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract With its 1 day lasting 243 days on Earth, Venus is the slowest‐spinning planet in the Solar System and its rotational bulge is anomalously small. A rotational bulge stabilizes the orientation of planets. Having only a tiny stabilizer, the rotational pole of Venus has been expected to separate from the figure pole in response to mantle flow ...
Vojtěch Patočka, Julia Maia, Ana‐Catalina Plesa   +2 more
wiley   +1 more source

Rethinking “Prebiotic Chemistry”

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract In origins‐of‐life research, the term “prebiotic chemistry” is commonly used to describe processes thought to be related to or required for the emergence of life. However, it suffers from several potential drawbacks that have caused the present group of authors to rethink their usage of the term.
Michael L. Wong, Madeline Christensen, Stuart Bartlett   +2 more
wiley   +1 more source

Clustering with phylogenetic tools in astrophysics

, 2015
Phylogenetic approaches are finding more and more applications outside the field of biology. Astrophysics is no exception since an overwhelming amount of multivariate data has appeared in the last twenty years or so. In particular, the diversification of
Fraix-Burnet, Didier
core   +1 more source

The Power of a Name: Toward a Unified Approach to Naming Space Weather Events

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract Our increasing reliance on technology vulnerable to space weather effects underscores the urgent need for effective public communication about these phenomena. While scientific research thrives on precise technical language, broader public engagement necessitates a more accessible and memorable approach.
Sophie Chabanski, Felix de Montety, Jean Lilensten, Stefaan Poedts, Luca Spogli   +4 more
wiley   +1 more source

The Roads Traveled to Reach a Greenhouse Gas Flux Network

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract Flux measurements of greenhouse gases provide information on the metabolic activity of ecosystems. And they are useful for parameterizing and validating remote sensing and biogeochemical models that are used to assess water and carbon fluxes across space and time.
Dennis Baldocchi
wiley   +1 more source