Results 171 to 180 of about 31,322 (206)

Subnational Border Reforms and Economic Activity in Africa

Oxford Bulletin of Economics and Statistics, Volume 88, Issue 5, Page 1203-1218, October 2026.
ABSTRACT Using GIS methods, we identify territories in Africa affected by subnational border reforms between 1992 and 2013. Descriptive statistics reveal that these territories differed from other African regions across several key dimensions. For example, these territories were more populous and exhibited greater ethnic diversity.
Thushyanthan Baskaran, Sebastian Blesse
wiley   +1 more source

Simulating Regional‐Scale Aerosol Radiative Effects of Wildfire Smoke Using a High‐Resolution Coupled Meteorology‐Chemistry Model: HRRR‐Chem

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 18, 28 September 2026.
Abstract Wildfires are increasing in frequency and intensity, strongly influencing both regional air quality and the Earth's radiation budget via their aerosol emissions. Relying on an unparalleled observational data set from the 2019 NOAA/NASA FIREX‐AQ campaign, this study quantifies the direct radiative effects of two wildfires using the HRRR‐Chem ...
Minsu Choi, Ravan Ahmadov, J. L. Schnell, Johana Romero‐Alvarez, Sudheer Bhimireddy, Haiqin Li, Joshua P. Schwarz, Pedro Campunzano Jost, Hongyu Guo, Jose L. Jimenez, Pawan Gupta, Thomas F. Eck, Philippe Goloub, Olga Kalashnikova, Chuanyu Xu, Fangjun Li, R. Bradley Pierce, Georg A. Grell   +17 more
wiley   +1 more source

Responses of Boundary Layer Cloud Structure and Particle Budget to Aerosol Sources During Arctic Marine Cold‐Air Outbreaks

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Marine cold‐air outbreaks (MCAOs) strongly modulate Arctic air‐sea exchange, yet their mixed‐phase clouds remain difficult to represent in Earth system models. We simulate an MCAO case using Lagrangian large‐eddy simulations that couple double‐moment microphysics with prognostic aerosol and ice formation parameterizations. We then apply a self‐
Peng Wu, Mikhail Ovchinnikov, Peter N. Blossey, Adam C. Varble, Jingjing Tian, Heng Xiao, Johannes Mülmenstädt, Jerome Fast   +7 more
wiley   +1 more source

OCO‐3 Meets ECOSTRESS: Insights Into Ecosystem Diurnal Water‐Use Efficiency From Co‐Located Solar‐Induced Fluorescence and Thermal Observations

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Terrestrial ecosystem regulation of carbon and water fluxes is critical for constraining climate–biosphere feedbacks but remains poorly quantified across space and time. Here, we evaluate whether co‐located observations from NASA's Orbiting Carbon Observatory‐3 (OCO‐3) and the ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station
Zoe Amie Pierrat, Thomas P. Kurosu, Abhishek Chatterjee, Joshua B. Fisher, Maggie Johnson, Le Kuai, Kanishka Mallick, Nicholas Parazoo, Benjamin Wiebe, Kerry Cawse‐Nicholson   +9 more
wiley   +1 more source

Wildfire Smoke Along Colorado's Front Range in 2020: An Evaluation of PM2.5 Monitor Spacing and Smoke Forecasts

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 18, 28 September 2026.
Abstract The 2020 wildfires caused widespread elevated fine particulate matter (PM2.5) concentrations across the western U.S. The Colorado Front Range experienced multiple smoke episodes from nearby fires and fires hundreds of kilometers away. Multiple days (88 total) with elevated PM2.5 along the Front Range occurred in 2020 between July and October ...
Brandon A. McGuire, Jeffrey R. Pierce, Bonne Ford, Sheryl Magzamen, Ravan Ahmadov, Eric James, Ashley Anderson, Katie Abrams, Emily V. Fischer   +8 more
wiley   +1 more source

Predicting and Explaining Lightning and Lightning‐Ignited Wildfires in Northern California With a Two‐Step Convolutional Neural Network Framework

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 18, 28 September 2026.
Abstract Lightning‐ignited wildfires (LIWs) are a major contributor to burned area in Northern California and have increased substantially in size over recent decades. Predicting LIWs remains challenging because ignition depends on both lightning occurrence and fuel‐meteorology interactions.
Sally S.‐C. Wang, L. Ruby Leung, Yun Qian, Richard Grotjahn   +3 more
wiley   +1 more source

MAIAC Aerosol Algorithm Over Water

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 18, 28 September 2026.
Abstract MAIAC VIIRS Collection 2 aerosol product for the first time provides global coverage over land and ocean. This paper gives a first systematic description of MAIAC ocean aerosol algorithm covering cases of open ocean, waters with sediments and brown waters from rivers' discharge.
Alexei Lyapustin, Yujie Wang, Myungje Choi, Andrew M. Sayer, Sergey Korkin   +4 more
wiley   +1 more source

Spaceborne Far‐Infrared Signal Simulations Over the Antarctic Plateau With Temperature‐Dependent Ice Cloud Optical Properties

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 17, 16 September 2026.
Abstract Longwave cloud radiative effects significantly influence variability in global and regional Earth systems. However, there have been very few, if any, measurements of the far‐infrared (FIR) radiation over the polar regions, where about half of the outgoing longwave radiation is in the FIR spectrum. This motivated the Polar Radiant Energy in the
Tong Ren, Ping Yang, Xianglei Huang
wiley   +1 more source

Impact Craters Reveal a Deeper Rock‐Poor Regolith in the Lunar Highlands

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract The only measurements of the highlands regolith occurred at the Apollo 14 and 16 landing sites, finding 10–15 m thick regolith; however, we show that the Apollo landing sites are anomalous due to their proximity to rare, highlands rocky craters and because they landed atop basin ejecta. Through observations of rocky crater populations, we show
M. A. Chertok, E. S. Costello, P. G. Lucey, S. M. Ireland, C. M. Elder   +4 more
wiley   +1 more source

Resolving the Physical Ambiguity of Passive Infrared Cloud Optical Thickness Retrievals With Microwave Observations

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Satellite thermal infrared (TIR) observations, combined with machine‐learning methods, enable nighttime retrievals of cloud optical thickness (COT), but their cloud‐top‐dominated radiances provide ambiguous information for optically thick clouds.
Chao Liu, Xiaoou Sun, Yikun Yang, Quan Wang, Chen Zhou, Bo Li, Xiuqing Hu, Byung‐Ju Sohn, Jonathan H. Jiang, Peng Zhang   +9 more
wiley   +1 more source