Results 31 to 40 of about 313 (129)

Sensitivity Assessment of WRF Parameterizations over Europe

Proceedings, 2017
Evaluation of the performance of the parameterization schemes used in the WRF model is assessed for temperature and precipitation over Europe at 36 km by 36 km grid resolution using gridded data from the ECA & D 0.25° regular grid.
Ioannis Stergiou, Efthimios Tagaris, Rafaella-Eleni P. Sotiropoulou   +2 more
doaj   +1 more source

Improved Simulations of the Quasi‐Biennial Oscillation in the Lower Stratosphere of an Earth System Model

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 7, July 2026.
Abstract Numerical experimentation using an atmospheric configuration of the Goddard Earth Observing System (GEOS) Earth System Model is used to examine the vertical structure of the simulated Quasi‐Biennial Oscillation (QBO). Using an improved representation of the parameterized gravity wave spectrum, it is demonstrated that with sufficient vertical ...
William M. Putman, Laura A. Holt, M. Joan Alexander, Lawrence Coy, Steven Pawson   +4 more
wiley   +1 more source

Exploiting simultaneous observational constraints on mass and absorption to estimate the global direct radiative forcing of black carbon and brown carbon [PDF]

Atmospheric Chemistry and Physics, 2014
Atmospheric black carbon (BC) is a leading climate warming agent, yet uncertainties on the global direct radiative forcing (DRF) remain large. Here we expand a global model simulation (GEOS-Chem) of BC to include the absorption enhancement associated ...
X. Wang, C. L. Heald, D. A. Ridley, J. P. Schwarz, J. R. Spackman, A. E. Perring, H. Coe, D. Liu, A. D. Clarke   +8 more
doaj   +1 more source

Modeling the Distribution, Impacts, and Mitigation of Anthropogenic Heat in Los Angeles

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 12, 28 June 2026.
Abstract Anthropogenic heat emissions from human energy consumption contribute to the urban heat island (UHI) effect, yet their spatiotemporal distributions and impacts remain uncertain. In this study, we develop a 100 m resolution, hourly anthropogenic heat flux (AHF) data set for Los Angeles County and use the Weather Research and Forecasting model ...
Joseph Ko, Hao Hu, Yun Li, Hannah Schlaerth, Stepp Mayes, McKenna Peplinski, Andrew Jin, Dan Li, Pouya Vahmani, Kelly Sanders, George Ban‐Weiss, Jiachen Zhang   +11 more
wiley   +1 more source

Top-of-atmosphere radiative cooling with white roofs: experimental verification and model-based evaluation

Environmental Research Letters, 2012
We evaluate differences in clear-sky upwelling shortwave radiation reaching the top of the atmosphere in response to increasing the albedo of roof surfaces in an area of India with moderately high aerosol loading.
Francisco Salamanca, Shaheen Tonse, Surabi Menon, Vishal Garg, Krishna P Singh, Manish Naja, Marc L Fischer   +6 more
doaj   +1 more source

Interpreting the ultraviolet aerosol index observed with the OMI satellite instrument to understand absorption by organic aerosols: implications for atmospheric oxidation and direct radiative effects [PDF]

Atmospheric Chemistry and Physics, 2016
Satellite observations of the ultraviolet aerosol index (UVAI) are sensitive to absorption of solar radiation by aerosols; this absorption affects photolysis frequencies and radiative forcing.
M. S. Hammer, R. V. Martin, R. V. Martin, A. van Donkelaar, V. Buchard, V. Buchard, O. Torres, D. A. Ridley, R. J. D. Spurr   +8 more
doaj   +1 more source

Toward Improved Tropical Cyclone Forecasting: An Optimized Strategy Combining Dynamic Initialization and Bogus Data Assimilation

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 12, 28 June 2026.
Abstract In numerical weather prediction, dynamic initialization (DI) of tropical cyclones (TCs) and bogus data assimilation (BDA) are two widely used vortex initialization methods, both of which substantially affect the track and intensity of simulated TCs.
Kefeng Zhu, Dajun Zhao, Xiaoqi Xu, Siwei Sun, Wenru Shi   +4 more
wiley   +1 more source

An Analysis of Hurricane Eyewall Ice Using a Novel Lagrangian Trajectory and Growth Model

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 11, 16 June 2026.
Abstract Ice crystals in tropical cyclones (TCs) remain infrequently observed and difficult to model using Eulerian microphysics parameterizations. To better understand TC eyewall ice crystal processes, the Ice Crystal Trajectory Growth (ICTG) model, previously applied to an idealized squall line, was used to simulate Lagrangian ice crystal ...
Bruno S. Rojas, Anthony C. Didlake Jr., Jerry Y. Harrington, Chelsey N. Laurencin, Yunji Zhang   +4 more
wiley   +1 more source

Simulation of Wind Speed Based on Different Driving Datasets and Parameterization Schemes Near Dunhuang Wind Farms in Northwest of China

Atmosphere, 2020
In this study, we evaluate the impacts of different datasets (e.g., NCEP global forecast system (GFS) and ERA5) that are used to derive the initial and boundary conditions, various planetary parameterization boundary layer (PBL) schemes and radiation ...
Tiejun Zhang, Cailing Zhao, Chongshui Gong, ZhaoXia Pu   +3 more
doaj   +1 more source

Performance Evaluation of the MPAS Model in Simulating Southeast Asian Rainfall Characteristics

International Journal of Climatology, Volume 46, Issue 7, 15 June 2026.
This study evaluates the performance of the Model for Prediction Across Scales–Atmosphere (MPAS) in reproducing key rainfall characteristics over Southeast Asia (SEA) during 2000–2020, using the MSWEP dataset as reference. MPAS realistically captures the observed meridional rainfall gradient, with higher rainfall in the south and lower in the north, as
Nguyen Thanh Hung, Alugula Boyaj, Srivatsan V. Raghavan, Nguyen Ngoc Son, Bhenjamin Jordan Ona   +4 more
wiley   +1 more source