Results 31 to 40 of about 471 (147)

Where Projects Fail: Geospatial Evidence of Delays and Cancellations in Chinese Development Finance

Journal of International Development, EarlyView.
ABSTRACT Delays and cancellations can severely undermine the effectiveness of development finance. Yet, little systematic evidence exists on where and why these disruptions occur within the rapidly expanding portfolio of Chinese‐financed development projects in Africa.
Leoni Mendler‐Krakau
wiley   +1 more source

Research advances in the data assimilative modeling of the Earth's radiation belt electrons

地球与行星物理论评
The Earth's radiation belts are regions where high-energy charged particles congregate in near-Earth space. Given that high-energy particles in the radiation belts pose a severe threat to the safety of spacecraft in orbit and astronauts, it is of vital ...
Xing Cao, Binbin Ni, Yuan Lei, Taorong Luo, Xiaoyu Wang   +4 more
doaj   +1 more source

Estimating Inner Magnetospheric Radial Diffusion Using a Hybrid-Vlasov Simulation

Frontiers in Astronomy and Space Sciences, 2022
Radial diffusion coefficients quantify non-adiabatic transport of energetic particles by electromagnetic field fluctuations in planetary radiation belts.
H. George, A. Osmane, E. K. J. Kilpua, S. Lejosne , L. Turc, M. Grandin, M. M. H. Kalliokoski, S. Hoilijoki, U. Ganse, M. Alho, M. Battarbee, M. Bussov, M. Dubart, A. Johlander, A. Johlander, T. Manglayev, K. Papadakis, Y. Pfau-Kempf, J. Suni, V. Tarvus, H. Zhou, M. Palmroth, M. Palmroth   +22 more
doaj   +1 more source

From Rare to Recurrent: Intensifying Hot–Dry Extremes Across Romania

International Journal of Climatology, EarlyView.
Romania has undergone a marked shift toward more frequent and spatially extensive compound hot–dry months since the 1990s, with persistent hotspots in the eastern Moldavian Plateau and the lower Danube–Bărăgan–Black Sea lowlands and comparatively buffered conditions at higher elevations.
Viorica Nagavciuc, Monica Ionita
wiley   +1 more source

Characteristics of Boundary Layer Height Variations in Global Arid Regions and Their Sensitivity to Influencing Energy Factors

International Journal of Climatology, EarlyView.
Global warming has intensified drought impacts across most arid regions, altering surface energy partitioning and atmospheric boundary layer (ABL) development. Using 1979–2018 ERA‐Interim reanalysis data, we show that the long‐term mean boundary layer height (BLH) over global arid regions is approximately 841.8 m, nearly 200 m higher than over humid ...
Rong Wang, Qiang Zhang, Ping Yue, Qian Huang, Yunshuai Zhang   +4 more
wiley   +1 more source

Small‐Scale Topographic Variability Shapes Molecular Diversity of Organic Matter in Coastal Dune Soils

Journal of Plant Nutrition and Soil Science, EarlyView.
Topography shapes ecosystem controls, driving microclimate, hydrology, and vegetation, which, in turn, influence topsoil traits and DOM composition in coastal dune soils. Distinct molecular patterns emerge across north‐facing and south‐facing slopes and dune valleys.
Lejonina Herting, Hannelore Waska, Kojo Amoako, Stephan L. Seibert, Gudrun Massmann, Philipp Maurischat   +5 more
wiley   +1 more source

Community Voices on the Future of Radiation Belt Research: A Summary of the 2024 GEM Radiation Belt Focus Group Round‐Table Discussion

Earth and Space Science
Earth's radiation belts are the regions where highly energetic charged particles are trapped by Earth's magnetic field, posing significant risks to the satellites and other space‐based technologies.
Hong Zhao, Lauren Blum, Aleksandr Ukhorskiy, Xiangrong Fu   +3 more
doaj   +1 more source

Prompt responses of magnetospheric whistler-mode waves to solar wind dynamic pressure pulses

Frontiers in Astronomy and Space Sciences, 2023
Whistler-mode waves play a critical role in shaping the Earth’s radiation belts, and their spatiotemporal distribution is vital for forecasting and modeling geospace weather.
Nigang Liu, Nigang Liu, Zhenpeng Su, Zhenpeng Su, Zhenpeng Su   +4 more
doaj   +1 more source

Revealing Dust Source Changes in East Asia From Past to Future: An Interpretable Deep Learning Approach

Land Degradation &Development, EarlyView.
ABSTRACT Aeolian dust source areas are controlled by climate and human activities and are closely associated with land degradation, yet their long‐term evolution under global warming remains insufficiently quantified. An integrated framework that couples a U‐Net segmentation model with Shapley Additive Explanations (SHAP) was built to map and attribute
Yanyu Li, Qizhong Wu, Xueshun Chen, Jiang Yue, Jieying He, Huaqiong Cheng   +5 more
wiley   +1 more source

Assessment of Spacecraft Internal Charging in the Earth's Outer Radiation Belt

Space Weather
The internal charging effects triggered by energetic (>100 keV) electrons in the Earth's radiation belts can cause anomalies and failures of electronic components aboard spacecraft.
Yuan Lei, Xing Cao, Binbin Ni, Xueshang Feng, Xiaoyu Wang   +4 more
doaj   +1 more source