A5054017640- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Cryospheric studies and observations
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Air Quality and Health Impacts
- Climate change and permafrost
- Vehicle emissions and performance
- Geophysics and Gravity Measurements
- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Precipitation Measurement and Analysis
- Soil Moisture and Remote Sensing
- Scientific Computing and Data Management
- Ionosphere and magnetosphere dynamics
- Fire effects on ecosystems
- Air Quality Monitoring and Forecasting
- Medical Imaging Techniques and Applications
- Climate Change Policy and Economics
Lawrence Livermore National Laboratory
2016-2025
Jiaxing University
2024-2025
Zhejiang Chinese Medical University
2025
Xiamen University
2025
Hunan Agricultural University
2015-2024
Fuzhou University
2024
University of Hong Kong
2024
Guizhou University
2024
Brookhaven National Laboratory
2024
Pacific Northwest National Laboratory
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. The Scenario Model Intercomparison Project (ScenarioMIP) defines and coordinates the main set of future climate projections, based on concentration-driven simulations, within Coupled phase 6 (CMIP6). This paper presents a range its outcomes by synthesizing results from participating global coupled Earth system models. We limit our scope to analysis strictly geophysical outcomes: mainly averages spatial patterns change for surface air temperature precipitation. also compare CMIP6...
Abstract. A Nationwide Nitrogen Deposition Monitoring Network (NNDMN) containing 43 monitoring sites was established in China to measure gaseous NH3, NO2, and HNO3 particulate NH4+ NO3− air and/or precipitation from 2010 2014. Wet/bulk deposition fluxes of Nr species were collected by gauge method measured continuous-flow analyzer; dry estimated using airborne concentration measurements inferential models. Our observations reveal large spatial variations atmospheric concentrations wet/bulk...
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....
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 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...
Abstract We revise the convective triggering function in Department of Energy's Energy Exascale Earth System Model (E3SM) Atmosphere version 1 (EAMv1) by introducing a dynamic constraint on initiation convection that emulates collective dynamical effects to prevent from being triggered too frequently and allowing air parcels launch above boundary layer capture nocturnal elevated convection. The former is referred as Convective Available Potential (dCAPE) trigger latter Unrestricted Launch...
Abstract. To estimate the impact of emissions by road, aircraft and ship traffic on ozone OH in present-day atmosphere six different atmospheric chemistry models have been used. Based newly developed global emission inventories for data sets each model performed sensitivity simulations reducing transport sector 5%. The results indicate that annual average lower tropospheric responds most sensitive to (50.6%±10.9% total induced perturbation), followed road (36.7%±9.3%) exhausts (12.7%±2.9%),...
[1] Delineating the boundary between troposphere and stratosphere in a chemistry transport model requires state variable for each air mass that maps out ever shifting, overlapping three-dimensional (3-D) at time step. Using an artificial tracer, e90, with surface sources 90 day decay time, e90 tropopause matches 1-D temperature lapse rate definition of as well seasonal variation ozone this boundary. This approach works from equator to pole, over all seasons, unlike methods based on potential...
Abstract This study systematically evaluates clouds simulated by the Energy Exascale Earth System Model Atmosphere version 1 (EAMv1) against satellite cloud observations. Both low‐ (1°) and high‐ (0.25°) resolution EAMv1 configurations generally underestimate in low latitudes midlatitudes overestimate Arctic, although error is smaller high‐resolution model. The of due to optically thin intermediate clouds, as overestimates thick clouds. Other model errors include largely underpredicted...
Abstract Nudging is a simulation technique widely used in sensitivity studies and the evaluation of atmosphere models. Care needed experimental setup order to achieve desired constraint on simulated atmospheric processes without introducing undue intervention. In this study, experiments are conducted with Energy Exascale Earth System Model (E3SM) Atmosphere Version 1 (EAMv1) identify setups that can give results representative model's long‐term climate meanwhile reasonably capture...
Abstract. Climate simulations with more accurate process-level representation at finer resolutions (<100 km) are a pressing need in order to provide detailed actionable information policy makers regarding extreme events changing climate. Computational limitation is major obstacle for building and running high-resolution (HR, here 0.25∘ average grid spacing the Equator) models (HRMs). A affordable path HRMs use global regionally refined model (RRM), which only simulates portion of globe HR...
Abstract Many weather forecast and climate models simulate warm surface air temperature (T 2m ) biases over midlatitude continents during the summertime, especially Great Plains. We present here one of a series papers from multimodel intercomparison project (CAUSES: Cloud Above United States Errors at Surface), which aims to evaluate role cloud, radiation, precipitation in contributing T bias using short‐term hindcast approach spring summer 2011. Observations are mainly Atmospheric Radiation...
Abstract Previous studies have shown that atmospheric models with a spectral element grid can benefit from putting physics calculations on relatively coarse finite volume grid. Here we demonstrate an alternative high‐order, element‐based mapping approach used to implement quasi‐equal‐area, in E3SM. Unlike similar methods, the new method E3SM requires topology data purely local each element, which trivially allows for regional mesh refinement. Simulations grids defined by 2 × 2, 3 3, and 4...
Abstract. Realistic simulation of the Earth's mean-state climate remains a major challenge, and yet it is crucial for predicting system in transition. Deficiencies models' process representations, propagation errors from one to another, associated compensating can often confound interpretation improvement model simulations. These biases also lead unrealistic projections incorrect attribution physical mechanisms governing past future change. Here we show that significantly improved global...
This work documents version two of the Department Energy's Energy Exascale Earth System Model (E3SM). E3SM 2 (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...
[1] We study the mechanisms driving stratosphere-troposphere exchange of ozone fluxes within a chemistry-transport model. For years 2004–2006, year-round, most stratosphere-to-troposphere flux O3 is associated with shear and folding around subtropical jet, this jet-related peaks for northern hemisphere in May. Over mid-latitude continents, however, surface convection penetrates to stratospheric levels (250 ppb), enhancing by 19% total, shifting peak June. This convection-related represents...
Nitrogen oxides emitted from aircraft engines alter the chemistry of atmosphere, perturbing greenhouse gases methane (CH 4 ) and ozone (O 3 ). We quantify uncertainties in radiative forcing (RF) due to short-lived increases O , long-lived decreases CH their net effect, using ensemble published models a factor decomposition each forcing. The captures major features ensemble, also shows which processes drive total uncertainty several climate metrics. Aviation-specific factors most for RFs, but...