Now showing items 1-10 of 17
Novel Approach for Determining Source-Receptor Relationships in Model Simulations : A Case Study of Black Carbon Transport in Northern Hemisphere Winter, A
Author(s):Ma, P.-L.; Gattiker, J. R.; Liu, Xiaohong; Rasch, P. J.
A Gaussian process emulator is applied to quantify the contributions of local and remote emissions of black carbon to its concentrations in different regions using a Latin hypercube sampling strategy for emission perturbations ...
Improved Cirrus Simulations in a General Circulation Model Using CARMA Sectional Microphysics
Author(s):Bardeen, C. G.; Gettelman, A.; Jensen, E.J.; Heymsfield, A.; Conley, A. J.; Delanoë, J.; Deng, Min; Toon, O. B.
We have developed a new cirrus model incorporating sectional ice microphysics from the Community Aerosol and Radiation Model for Atmospheres (CARMA) in the latest version of NCAR's Community Atmosphere Model (CAM5). ...
Soot Microphysical Effects on Liquid Clouds, a Multi-Model Investigation
Author(s):Koch, D.; Balkanski, Y.; Bauer, S. E.; Easter, R. C.; Ferrachat, S.; Ghan, S. J.; Hoose, C.; Iversen, T.; Kirkevåg, A.; Kristjansson, J. E.; Liu, Xiaohong; Lohmann, U.; Menon, S.; Quaas, J.; Schulz, M.; Seland, Ø.; Takemura, T.; Yan, N.
We use global models to explore the microphysical effects of carbonaceous aerosols on liquid clouds. Although absorption of solar radiation by soot warms the atmosphere, soot may cause climate cooling due to its contribution ...
On Factors Controlling Marine Boundary Layer Aerosol Optical Depth
Author(s):Luo, Tao; Yuan, Renmin; Wang, Zhien
Sea spray aerosol is one of the largest natural contributors to the global aerosol loading and thus plays an important role in the global radiative budget through both direct and indirect effects. Previous studies have ...
Aerosol First Indirect Effects on Non-Precipitating Low-Level Liquid Cloud Properties as Simulated by CAM5 at ARM Sites
Author(s):Zhao, C.; Klein, S. A.; Xie, S.; Liu, Xiaohong; Boyle, J. S.; Zhang, Y.
We quantitatively examine the aerosol first indirect effects (FIE) for non-precipitating low-level single-layer liquid phase clouds simulated by the Community Atmospheric Model version 5 (CAM5) running in the weather ...
Evaluating WRF-Chem Aerosol Indirect Effects in Southeast Pacific Marine Stratocumulus during VOCALS-REx
Author(s):Saide, P. E.; Spak, S. N.; Carmichael, G. R.; Mena-Carrasco, M. A.; Yang, Q.; Howell, S.; Leon, D. C.; Snider, Jefferson Robert; Bandy, A. R.; Collett, J. L.; Benedict, K. B.; de Szoeke, S. P.; Hawkins, L. N.; Allen, G.; Crawford, I.; Crosier, J.; Springston, S. R.
We evaluate a regional-scale simulation with the WRF-Chem model for the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx), which sampled the Southeast ...
Seasonal Variations of Antarctic Clouds Observed by CloudSat and CALIPSO Satellites
Author(s):Adhikari, L.; Wang, Z.; Deng, Min
The multiyear lidar and radar measurements obtained from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) and CloudSat between June 2006 and May 2010 were used to investigate the seasonal and ...
Sensitivity Study of Radiative Fluxes at the Top of Atmosphere to Cloud-Microphysics and Aerosol Parameters in the Community Atmosphere Model CAM5, A
Author(s):Zhao, C.; Liu, Xiaohong; Qian, Y.; Yoon, J.; Hou, Z.; Lin, G.; McFarlane, S.; Wang, H.; Yang, B.; Ma, P.-L; Yan, H.; Bao, J.
In this study, we investigated the sensitivity of net radiative fluxes (FNET) at the top of atmosphere (TOA) to 16 selected uncertain parameters mainly related to the cloud microphysics and aerosol schemes in the Community ...
Indirect Radiative Forcing by Ion-Mediated Nucleation of Aerosol
Author(s):Yu, F.; Luo, G.; Liu, Xiaohong; Easter, R. C.; Ma, X.; Ghan, S. J.
A clear understanding of particle formation mechanisms is critical for assessing aerosol indirect radiative forcing and associated climate feedback processes. Recent studies reveal the importance of ion-mediated nucleation ...
Global Distribution and Climate Forcing of Marine Organic Aerosol : 1. Model Improvements and Evaluation
Author(s):Meskhidze, N.; Xu, J.; Gantt, B.; Zhang, Y.; Nenes, A.; Ghan, S. J.; Liu, Xiaohong; Easter, R.; Zaveri, R.
Marine organic aerosol emissions have been implemented and evaluated within the National Center of Atmospheric Research (NCAR)'s Community Atmosphere Model (CAM5) with the Pacific Northwest National Laboratory's 7-mode ...