Article
Meteorology & Atmospheric Sciences
Arthur Z. Hu, Adele L. Igel
Summary: This study uses a bulk scheme called AMP to reveal the structural differences between bin and bulk schemes in cloud and precipitation properties. The results show that there is only a small difference between the two schemes, except in the process of small droplets colliding and combining to form raindrops.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Article
Meteorology & Atmospheric Sciences
Jun Zhang, Jiming Sun, Wei Deng, Wenhao Hu, Yongqing Wang
Summary: The shape parameter of the Gamma size distribution is crucial for the evolution of cloud droplet spectra. Inaccurate specification of this parameter in commonly used bulk double-moment schemes hinders the reasonable description of cloud droplet spectra during condensation. A newly-developed triple-parameter condensation scheme, which determines the shape parameter through the number concentration, cloud water content, and reflectivity factor of cloud droplets, has been proposed for improving the evolution of cloud droplet spectra.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Andrew Gettelman, Hugh Morrison, Trude Eidhammer, Katherine Thayer-Calder, Jian Sun, Richard Forbes, Zachary McGraw, Jiang Zhu, Trude Storelvmo, John Dennis
Summary: This study presents updates and corrections to the cloud microphysical scheme used in models like CESM, including a new scheme called PUMAS and the ability to run on GPUs. The main changes include refining ice nucleation, incorporating vapor deposition onto snow, and introducing implicit sedimentation treatment. The study finds corrections are needed for the freezing parameterization and that ice nucleation has significant impacts on climate. The revised scheme produces less cloud liquid and ice, but this can be adjusted through changes in cloud liquid loss. There are minimal effects on cloud feedbacks but reductions in aerosol-cloud interactions.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Jinfang Yin, Donghai Wang, Guoqing Zhai, Hong Wang, Huanbin Xu, Chongjian Liu
Summary: The representation of cloud microphysical processes is crucial in numerical models. This study improves the existing scheme by introducing variable shape parameters and incorporating minor improvements in cloud processes. The improved scheme successfully reproduces the spatial distribution and temporal evolution of rainfall, as well as captures cloud features, showcasing its promise for future use.
ADVANCES IN ATMOSPHERIC SCIENCES
(2022)
Article
Meteorology & Atmospheric Sciences
Xi Zhao, Yanluan Lin, Yali Luo, Qifeng Qian, Xi Liu, Xiantong Liu, Brian A. Colle
Summary: The double-moment version of the SBU-YLIN cloud microphysical scheme in WRF has been introduced, showing improved performance in simulating a squall line case, especially in describing key microphysical processes such as rain evaporation.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Geosciences, Multidisciplinary
Wentao Zhang, Xiangjun Shi, Chunsong Lu
Summary: This study investigates the impacts of the ice-crystal size distribution shape parameter (mu(i)) on cloud microphysics, and finds that mu(i) has significant impacts on the distribution and statistical mean radii of ice crystals, affecting cloud radiative effect and precipitation rate.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2022)
Article
Environmental Sciences
Jiaojiao Liu, Xiangjun Shi
Summary: Cirrus thinning is a new geoengineering approach that can provide considerable cooling effects, with the flexible seeding method being essential for optimal results. However, fixed seeding ice nuclei particle concentrations may result in weaker effects.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Peter A. Bogenschutz, Hsiang-He Lee, Qi Tang, Takanobu Yamaguchi
Summary: In this study, a novel framework is developed to reduce biases in general circulation models (GCMs) related to marine stratocumulus clouds, while minimizing computational costs. The framework utilizes a regionally refined mesh (RRM) to increase horizontal resolution, and the Framework for Improvement by Vertical Enhancement (FIVE) to enhance vertical resolution for specific physical processes important for stratocumulus. The framework is successfully applied off the coast of Peru in the southeastern Pacific, effectively replicating high-resolution benchmark simulation results with reduced computational cost and improved accuracy compared to standard-resolution simulations.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Andreas Bott
Summary: The study investigates the impact of cloudiness on the evolution of fog, revealing that the appearance of cloudiness in the morning triggers efficient dissipation of fog. In situations with weak turbulence, quasi-periodic oscillations of liquid water content occur in MiFog simulations. Comparison of MiFog and PaFog model runs shows that PaFog is capable of sufficiently simulating the overall fog properties most of the time.
ATMOSPHERIC RESEARCH
(2021)
Article
Environmental Sciences
Minsong Huang
Summary: The shattered ice particles have different impacts on the CIP measurement depending on their size, affecting the measurement of particle size distribution, particle number concentration, and ice water content. In the stratiform region, the ratio of uncorrected PSD to corrected PSD is relatively small, while in the convective region, it is larger. In the convective region, the measured particle number concentration and ice water content can be significantly overestimated compared to the stratiform region.
Article
Meteorology & Atmospheric Sciences
Michael J. Foster, Coda Phillips, Andrew K. Heidinger, Eva E. Borbas, Yue Li, W. Paul Menzel, Andi Walther, Elisabeth Weisz
Summary: A new version 6.0 of the PATMOS-x multidecadal cloud record is now available, showing improved stability and consistency compared to the previous version. This is achieved through the addition of multidimensional variables, constraining cloud retrievals to available radiometric bands, and incorporating data from the HIRS instrument.
JOURNAL OF CLIMATE
(2023)
Article
Meteorology & Atmospheric Sciences
Tatsuya Seiki, Tomoki Ohno
Summary: This study revises the cloud microphysical processes in a global atmospheric model to improve the representation of cloud ice aggregation, graupel production, and ice nucleation. The revised processes successfully extend the lifetime of cloud ice and modulate convective intensity. Additionally, the modifications significantly increase cloud ice number concentration and improve outgoing longwave radiation. These revisions are beneficial for climate simulations and severe storm representation.
JOURNAL OF THE ATMOSPHERIC SCIENCES
(2023)
Article
Meteorology & Atmospheric Sciences
Xin Xu, Xuelong Chen, Dianbin Cao, Yajing Liu, Luhan Li, Yaoming Ma
Summary: This study explores the features of raindrop size distribution on the southeastern Tibetan Plateau and compares them with low-altitude regions. It was found that the raindrop concentration and maximum diameter on the Tibetan Plateau are smaller, with higher falling speeds and more maritime-like convection rainfall.
JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Han-Gyul Jin, Jong-Jin Baik, Hyunho Lee, Tanvir Ahmed
Summary: In this study, a physically-based microphysics scheme for warm rain is developed and evaluated. The new scheme performs complex calculations but is computationally feasible for weather and climate models. It is found that the scheme reproduces observed cloud properties well in simulations of shallow cumuli field and warm convective clouds.
ATMOSPHERIC RESEARCH
(2022)
Article
Meteorology & Atmospheric Sciences
Melanie Bieli, Oliver R. A. Dunbar, Emily K. de Jong, Anna Jaruga, Tapio Schneider, Tobias Bischoff
Summary: This article introduces a new bulk microphysics scheme called Cloudy and demonstrates how Bayesian learning can be applied to infer parameters. By using the CES algorithm, computational efficiency is improved and noise pollution is reduced, leading to successful results in experiments.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Meteorology & Atmospheric Sciences
Michael J. DeFlorio, Ian D. Goodwin, Daniel R. Cayan, Arthur J. Miller, Steven J. Ghan, David W. Pierce, Lynn M. Russell, Balwinder Singh
Article
Multidisciplinary Sciences
Edward Gryspeerdt, Johannes Quaas, Sylvaine Ferrachat, Andrew Gettelman, Steven Ghan, Ulrike Lohmann, Hugh Morrison, David Neubauer, Daniel G. Partridge, Philip Stier, Toshihiko Takemura, Hailong Wang, Minghuai Wang, Kai Zhang
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2017)
Article
Multidisciplinary Sciences
Yang Yang, Lynn M. Russell, Sijia Lou, Hong Liao, Jianping Guo, Ying Liu, Balwinder Singh, Steven J. Ghan
NATURE COMMUNICATIONS
(2017)
Article
Meteorology & Atmospheric Sciences
Yuxing Yun, Jiwen Fan, Heng Xiao, Guang J. Zhang, Steven J. Ghan, Kuan-Man Xu, Po-Lun Ma, William I. Gustafson
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2017)
Article
Meteorology & Atmospheric Sciences
Zhibo Zhang, Xiquan Dong, Baike Xi, Hua Song, Po-Lun Ma, Steven J. Ghan, Steven Platnick, Patrick Minnis
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2017)
Article
Meteorology & Atmospheric Sciences
Kai Zhang, Rong Fu, Muhammad J. Shaikh, Steven Ghan, Minghuai Wang, L. Ruby Leung, Robert E. Dickinson, Jose Marengo
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2017)
Article
Meteorology & Atmospheric Sciences
Guangxing Lin, Yun Qian, Huiping Yan, Chun Zhao, Steven J. Ghan, Richard Easter, Kai Zhang
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2017)
Article
Meteorology & Atmospheric Sciences
Sijia Lou, Lynn M. Russell, Yang Yang, Ying Liu, Balwinder Singh, Steven J. Ghan
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2017)
Article
Meteorology & Atmospheric Sciences
Hua Song, Zhibo Zhang, Po-Lun Ma, Steven J. Ghan, Minghuai Wang
JOURNAL OF CLIMATE
(2018)
Article
Meteorology & Atmospheric Sciences
Teklu K. Tesfa, L. Ruby Leung, Steven J. Ghan
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2020)
Article
Meteorology & Atmospheric Sciences
Rahul A. Zaveri, Richard C. Easter, Balwinder Singh, Hailong Wang, Zheng Lu, Simone Tilmes, Louisa K. Emmons, Francis Vitt, Rudong Zhang, Xiaohong Liu, Steven J. Ghan, Philip J. Rasch
Summary: The introduction of nitrate aerosol in the model allows for accurate simulation of global aerosol distributions, showing the impact of nitrate on aerosol formation and atmospheric thermodynamics processes. Nitrate leads to increased aerosol growth and cooling effects on a global scale.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Environmental Sciences
Kai Zhang, Wentao Zhang, Hui Wan, Philip J. Rasch, Steven J. Ghan, Richard C. Easter, Xiangjun Shi, Yong Wang, Hailong Wang, Po-Lun Ma, Shixuan Zhang, Jian Sun, Susannah M. Burrows, Manish Shrivastava, Balwinder Singh, Yun Qian, Xiaohong Liu, Jean-Christophe Golaz, Qi Tang, Xue Zheng, Shaocheng Xie, Wuyin Lin, Yan Feng, Minghuai Wang, Jin-Ho Yoon, L. Ruby Leung
Summary: This study analyzes the effective radiative forcing of anthropogenic aerosols (ERFaer) simulated by the E3SM version 1 atmospheric model, finding that it is influenced by aerosol composition and optical properties, and that there are regional differences and temporal evolutions. After 1970, the relationships between key aerosol and cloud properties changed significantly, leading to no increase in the global annual mean ERF aer magnitude. Compared to other models, E3SMv1 has a relatively large ERFaer, primarily due to the large indirect aerosol effect. Reducing the anthropogenic aerosol effect through liquid or mixed-phase clouds would be more effective in reducing the net ERFaer magnitude.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Meteorology & Atmospheric Sciences
Ralph A. Kahn, Tim A. Berkoff, Charles Brock, Gao Chen, Richard A. Ferrare, Steven Ghan, Thomas F. Hansico, Dean A. Hegg, J. Vanderlei Martins, Cameron S. McNaughton, Daniel M. Murphy, John A. Ogren, Joyce E. Penner, Peter Pilewskie, John H. Seinfeld, Douglas R. Worsnop
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
(2017)
Article
Environmental Sciences
Maria Sand, Bjorn H. Samset, Yves Balkanski, Susanne Bauer, Nicolas Bellouin, Terje K. Berntsen, Huisheng Bian, Mian Chin, Thomas Diehl, Richard Easter, Steven J. Ghan, Trond Iversen, Alf Kirkevag, Jean-Francois Lamarque, Guangxing Lin, Xiaohong Liu, Gan Luo, Gunnar Myhre, Twan van Noije, Joyce E. Penner, Michael Schulz, Oyvind Seland, Ragnhild B. Skeie, Philip Stier, Toshihiko Takemura, Kostas Tsigaridis, Fangqun Yu, Kai Zhang, Hua Zhang
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2017)
Article
Environmental Sciences
Zak Kipling, Philip Stier, Colin E. Johnson, Graham W. Mann, Nicolas Bellouin, Susanne E. Bauer, Tommi Bergman, Mian Chin, Thomas Diehl, Steven J. Ghan, Trond Iversen, Alf Kirkevag, Harri Kokkola, Xiaohong Liu, Gan Luo, Twan van Noije, Kirsty J. Pringle, Knut von Salzen, Michael Schulz, Oyvind Seland, Ragnhild B. Skeie, Toshihiko Takemura, Kostas Tsigaridis, Kai Zhang
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2016)