A5065736522- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Climate variability and models
- Meteorological Phenomena and Simulations
- Air Quality and Health Impacts
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Aeolian processes and effects
- Air Quality Monitoring and Forecasting
- Climate change and permafrost
- Climate Change and Geoengineering
- Geophysics and Gravity Measurements
- Fire effects on ecosystems
- Ionosphere and magnetosphere dynamics
- Marine and coastal ecosystems
- COVID-19 impact on air quality
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Ocean Acidification Effects and Responses
- Climate Change and Health Impacts
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Vehicle emissions and performance
Pacific Northwest National Laboratory
2016-2025
Cooperative Institute for Research in Environmental Sciences
2009-2024
Beijing University of Chinese Medicine
2023-2024
Lawrence Livermore National Laboratory
2024
NASA Earth Science
2024
East China University of Technology
2024
Lawrence Livermore National Security
2023
Battelle
2022-2023
Government of the United States of America
2023
University of Washington
2023
This work documents the first version of U.S. Department Energy (DOE) new Exascale Earth System Model (E3SMv1). We focus on standard resolution fully coupled physical model designed to address DOE mission-relevant water cycle questions. Its components include atmosphere and land (110-km grid spacing), ocean sea ice (60 km in midlatitudes 30 at equator poles), river transport (55 km) models. base configuration will also serve as a foundation for additional configurations exploring higher...
Abstract. Atmospheric carbonaceous aerosols play an important role in the climate system by influencing Earth's radiation budgets and modifying cloud properties. Despite importance, their representations large-scale atmospheric models are still crude, which can influence model simulated burden, lifetime, physical, chemical optical properties, forcing of aerosols. In this study, we improve current three-mode version Modal Aerosol Module (MAM3) Community Atmosphere Model 5 (CAM5) introducing...
Abstract The Energy Exascale Earth System Model Atmosphere version 1, the atmospheric component of Department Energy's is described. model began as a fork well‐known Community Model, but it has evolved in new ways, and coding, performance, resolution, physical processes (primarily cloud aerosols formulations), testing development procedures now differ significantly. Vertical resolution was increased (from 30 to 72 layers), top extended 60 km (~0.1 hPa). A simple ozone photochemistry predicts...
Abstract This study provides an overview of the coupled high‐resolution Version 1 Energy Exascale Earth System Model (E3SMv1) and documents characteristics a 50‐year‐long control simulation with time‐invariant 1950 forcings following HighResMIP protocol. In terms global root‐mean‐squared error metrics, this is generally superior to results from low‐resolution configuration E3SMv1 (due resolution, tuning changes, possibly initialization procedure) compares favorably models in CMIP5 ensemble....
<strong class="journal-contentHeaderColor">Abstract.</strong> We present a suite of new climate model experiment designs for the Geoengineering Model Intercomparison Project (GeoMIP). This set experiments, named GeoMIP6 (to be consistent with Coupled Phase 6), builds on previous GeoMIP project simulations, and has been expanded to address several further important topics, including key uncertainties in extreme events, use geoengineering as part portfolio responses change, relatively idea...
A large number of processes are involved in the chain from emissions aerosol precursor gases and primary particles to impacts on cloud radiative forcing. Those manifest a relationships that can be expressed as factors dlnX/dlnY driving effects These include between condensation nuclei (CCN) concentration emissions, droplet CCN concentration, fraction number, optical depth forcing depth. The relationship further decomposed into sum two terms involving effective radius liquid water path with...
Abstract. Many global aerosol and climate models, including the widely used Community Atmosphere Model version 5 (CAM5), have large biases in predicting aerosols remote regions such as upper troposphere high latitudes. In this study, we conduct CAM5 sensitivity simulations to understand role of key processes associated with transformation wet removal affecting vertical horizontal long-range transport regions. Improvements are made that currently not well represented CAM5, which guided by...
Abstract The new Energy Exascale Earth System Model Version 1 (E3SMv1) developed for the U.S. Department of has significant treatments aerosols and light‐absorbing snow impurities as well their interactions with clouds radiation. This study describes seven sets aerosol‐related (involving emissions, particle formation, aerosol transport, wet scavenging resuspension, radiative transfer) examines how they affect global forcing in E3SMv1. Altogether, give a reduced total (−1.6 W/m 2 )...
Abstract This study provides comprehensive insight into the notable differences in clouds and precipitation simulated by Energy Exascale Earth System Model Atmosphere version 0 1 (EAMv1). Several sensitivity experiments are conducted to isolate impact of changes model physics, resolution, parameter choices on these differences. The overall improvement EAMv1 is primarily attributed introduction a simplified third‐order turbulence parameterization Cloud Layers Unified By Binormals (along with...
Abstract. The WRF-Chem model coupled with a single-layer urban canopy (UCM) is integrated for 5 years at convection-permitting scale to investigate the individual and combined impacts of urbanization-induced changes in land cover pollutant emissions on regional climate Yangtze River Delta (YRD) region eastern China. Simulations urbanization effects reasonably reproduced observed features temperature precipitation YRD region. Urbanization over induces an heat island (UHI) effect, which...
Abstract This paper documents the biogeochemistry configuration of Energy Exascale Earth System Model (E3SM), E3SMv1.1‐BGC. The model simulates historical carbon cycle dynamics, including losses predicted in response to land use and cover change, responses changes climate. In addition, we introduce several innovations treatment soil nutrient limitation mechanisms, explicit dependence on phosphorus availability. suite simulations described here includes E3SM contributions Coupled...
Abstract This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SMv2 is a significant evolution from its predecessor E3SMv1, resulting in model that nearly twice as fast and with simulated climate improved many metrics. We describe physical lower horizontal resolution configuration consisting 110 km atmosphere, 165 land, 0.5° river routing model, an ocean sea ice mesh spacing varying between 60 mid‐latitudes 30 at equator poles. The...
A key challenge in aerosol pollution studies and climate change assessment is to understand how atmospheric particles are initially formed
Abstract A new modeling framework is used to investigate aerosol–cloud–precipitation interactions and dynamical feedbacks at the mesoscale. The focus on simulation of formation evolution cellular structures that are commonly seen in satellite images marine stratocumulus clouds. Simulations performed moderate resolution a 60 × km2 domain for 16 h adequately represent mesoscale organization associated with open cells precipitation. Results support emerging understanding precipitation plays...
The equilibrium climate response to the total effects (direct, indirect and semi‐direct effects) of aerosols arising from anthropogenic biomass burning emissions on South Asian summer monsoon system is studied using a coupled atmosphere‐slab ocean model. Our results suggest that generally induce reduction in mean precipitation over most parts Indian subcontinent, strongest along western coastline peninsula eastern Nepal region, but modest increases also occur north part subcontinent. While...
The idea behind the marine cloud-brightening (MCB) geoengineering technique is that seeding stratocumulus clouds with copious quantities of roughly monodisperse sub-micrometre sea water particles might significantly enhance cloud droplet number concentration, and thereby albedo possibly longevity. This would produce a cooling, which general circulation model (GCM) computations suggest could-subject to satisfactory resolution technical scientific problems identified herein-have capacity...
Abstract. Black carbon (BC) particles over the Himalayas and Tibetan Plateau (HTP), both airborne those deposited on snow, have been shown to affect snowmelt glacier retreat. Since BC HTP may originate from a variety of geographical regions emission sectors, it is essential quantify source–receptor relationships in order understand contributions natural anthropogenic emissions provide guidance for potential mitigation actions. In this study, we use Community Atmosphere Model version 5 (CAM5)...
Significance Uncertainties in the strength of aerosol–cloud interactions drive current uncertainty anthropogenic forcing climate. Previous studies have highlighted shortcomings using satellite data for determining forcing, which underestimate aerosol forcing. This work demonstrates that component radiative from due to instantaneous effect on cloud reflectivity (RFaci) can be calculated within 20%, only present-day observations variability and properties, provided is known. The model results...
<strong class="journal-contentHeaderColor">Abstract.</strong> Understanding the climate impacts of solar geoengineering is essential for evaluating its benefits and risks. Most previous simulations have prescribed a particular strategy evaluated modeled effects. Here we turn this approach around by first choosing example objectives then designing to meet those in models. <br><br> There are four criteria strategy: (i)Â an explicit specification objectives, (ii)Â defining what forcing agents...
Abstract This is the second of two companion papers on modeling mesoscale cellular structures and drizzle in marine stratocumulus. In first, aerosol–cloud–precipitation interactions dynamical feedbacks were investigated to study formation evolution open closed separately. this paper, coexisting cells how they influence one another are examined a model domain 180 × 60 1.5 km3. Simulations show that gradients aerosol at open–closed-cell boundary cause precipitation generate circulation. The...
Abstract We introduce an explicit emission tagging technique in the Community Atmosphere Model to quantify source‐region‐resolved characteristics of black carbon (BC), focusing on Arctic. Explicit BC source regions without perturbing emissions provides a physically consistent and computationally efficient approach establish source‐receptor relationships transport pathways. Our analysis shows that contributions major global burden are not proportional respective due strong region‐dependent...