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Turbulence in the tropical stratosphere, equatorial Kelvin waves, and the quasi-biennial oscillation.
Proc Natl Acad Sci U S A
January 2025
Laboratoire de Météorologie Dynamique/Institut Pierre Simon Laplace, École Normale Supérieure- Paris Sciences et Lettres Université, École Polytechnique- Institut Polytechnique de Paris, Sorbonne Université, CNRS, Paris 91128, France.
The tropical stratosphere is the gateway to the global stratosphere and a commonly proposed location for solar geoengineering. The dynamics of this remote and difficult to observe region are poorly understood, particularly at turbulent length scales. Existing observational estimates of turbulence frequency and strength vary widely.
View Article and Find Full Text PDFSolar geoengineering research faces geopolitical deadlock.
Science
January 2025
School of Politics and International Studies, University of Leeds, Leeds, UK.
The permissive "science first" approach has failed, but a nondeployment deal might yet enable responsible research.
View Article and Find Full Text PDFImpact of solar geoengineering on temperature-attributable mortality.
Proc Natl Acad Sci U S A
December 2024
Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637.
Decisions about solar geoengineering (SG) entail risk-risk tradeoffs between the direct risks of SG and SG's ability to reduce climate risks. Quantitative comparisons between these risks are needed to inform public policy. We evaluate idealized SG's effectiveness in reducing deaths from warming using two climate models and an econometric analysis of temperature-attributable mortality.
View Article and Find Full Text PDFSensitivity of Band-Pass Filtered In Situ Low-Earth Orbit and Ground-Based Ionosphere Observations to Lithosphere-Atmosphere-Ionosphere Coupling Over the Aegean Sea: Spectral Analysis of Two-Year Ionospheric Data Series.
Sensors (Basel)
December 2024
Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Ul. Oczapowskiego 2, 10-719 Olsztyn, Poland.
This study demonstrates a rich complexity of the time-frequency ionospheric signal spectrum, dependent on the measurement type and platform. Different phenomena contributing to satellite-derived and ground-derived geophysical data that only selected signal bands can be potentially sensitive to seismicity over time, and they are applicable in lithosphere-atmosphere-ionosphere coupling (LAIC) studies. In this study, satellite-derived and ground-derived ionospheric observations are filtered by a Fourier-based band-pass filter, and an experimental selection of potentially sensitive frequency bands has been carried out.
View Article and Find Full Text PDFNeither climate laboratory nor knowledge vacuum: What's at stake for the Global South in the debate around solar geoengineering research.
Science
November 2024
Rose M. Mutiso is the research director of the Energy for Growth Hub, London, UK.
Recently, I sat in a room in Cape Town with African climate scientists, watching them present results from sophisticated models examining how solar geoengineering interventions might affect local weather patterns across the continent. These researchers, primarily climate impact modelers who have expanded their work to include solar geoengineering scenarios, were doing exactly what critics claim the Global South lacks capacity for: producing rigorous, locally relevant climate science.
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