Decadal application of WRF/chem for regional air quality and climate modeling over the U.S. under the representative concentration pathways scenarios. Part 2: Current vs. future simulations
Air quality
; Atmospheric composition
; Boundary layer flow
; Boundary layers
; Carbon
; Climate models
; Emission control
; Gas emissions
; Greenhouse gases
; Quality control
; Reduction
; Spatial distribution
; Volatile organic compounds
; Wind
; Biogenic volatile organic compounds
; Cloud droplet number concentrations
; Continental U.S
; Planetary boundary layers
; Regional air quality
; The representative concentration pathways (RCP) scenarios
; Trend analysis
; WRF/Chem
; Climate change
; carbon
; chemical compound
; nitrogen oxide
; ozone
; volatile organic compound
; air quality
; atmospheric chemistry
; atmospheric modeling
; boundary layer
; climate feedback
; climate modeling
; concentration (composition)
; decadal variation
; future prospect
; nitrous oxide
; ozone
; regional pattern
; scenario analysis
; trend analysis
; volatile organic compound
; weather forecasting
; air quality
; Article
; boundary layer
; climate
; climate change
; controlled study
; gas
; greenhouse gas
; humidity
; North America
; particulate matter
; precipitation
; priority journal
; simulation
; temperature
; titrimetry
; wind
; United States
Scopus学科分类:
Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
Following a comprehensive model evaluation, this Part II paper presents projected changes in future (2046–2055) climate, air quality, and their interactions under the RCP4.5 and RCP8.5 scenarios using the Weather, Research and Forecasting model with Chemistry (WRF/Chem). In general, both WRF/Chem RCP4.5 and RCP8.5 simulations predict similar increases on average (∼2 �C) for 2-m temperature (T2) but different spatial distributions of the projected changes in T2, 2-m relative humidity, 10-m wind speed, precipitation, and planetary boundary layer height, due to differences in the spatial distributions of projected emissions, and their feedbacks into climate. Future O3mixing ratios will decrease for most parts of the U.S. under the RCP4.5 scenario but increase for all areas under the RCP8.5 scenario due to higher projected temperature, greenhouse gas concentrations and biogenic volatile organic compounds (VOC) emissions, higher O3values for boundary conditions, and disbenefit of NOxreduction and decreased NO titration over VOC-limited O3chemistry regions. Future PM2.5concentrations will decrease for both RCP4.5 and RCP8.5 scenarios with different trends in projected concentrations of individual PM species. Total cloud amounts decrease under both scenarios in the future due to decreases in PM and cloud droplet number concentration thus increased radiation. Those results illustrate the impacts of carbon policies with different degrees of emission reductions on future climate and air quality. The WRF/Chem and WRF simulations show different spatial patterns for projected changes in T2 for future decade, indicating different impacts of prognostic and prescribed gas/aerosol concentrations, respectively, on climate change. � 2016 Elsevier Ltd
Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Yahya K,, Campbell P,, Zhang Y. Decadal application of WRF/chem for regional air quality and climate modeling over the U.S. under the representative concentration pathways scenarios. Part 2: Current vs. future simulations[J]. Atmospheric Environment,2017-01-01,152