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Air pollution and heavy haze have become China’s biggest environmental problem

The impact of the thermal power industries from the Beijing-Tianjin-Hebei regions on Beijing haze studied by the two-way coupled WRF-CMAQ model (Preliminary results).

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Air pollution and heavy haze have become China’s biggest environmental problem

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  1. The impact of the thermal power industries from the Beijing-Tianjin-Hebei regions on Beijing haze studied by the two-way coupled WRF-CMAQ model (Preliminary results) Shaocai Yu1, Qingyu Zhang1, Renchang Yan1, Pengfei Li1, Bixin Chen1, Yanqun Li1, Weiping Liu1, David Wong2, Kiran Alapaty2, Jon Pleim2 and Rohit Mathur2 1 Research Center for Air Pollution and Health,College of Environmental and Natural Resources, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China. 2Atmospheric Modeling and Analysis Division, NERL, U.S. EPA, RTP, NC 27711, USA

  2. Introduction (Motivation) Air pollution and heavy haze have become China’s biggest environmental problem Tianjin Beijing Xian Taiyuan Hazy days in 2012: 103-225 day Chengdu Chongqing Nanjing 2012 Shanghai Nanchang Guangzhou Fuzhou Wenzhou Number of haze days in 2013 are the biggest since 1960

  3. Introduction (Motivation) Air pollution and heavy haze have become China’s biggest environmental problem AQI on 10/24/2014, 8:00, major pollutant is PM2.5 Beijing-Tianjin-Hebei (BTH) regions Superior (green), good (yellow), slight（Orange), moderate (red), severe (purple), serious (maroon)

  4. Model Description (Configuration) Two-way coupled WRF-CMAQ modeling System (Interaction and feedback) (Yu et al., 2014) Meteorological Model WRF modeling System: x=36, 12 km, 4km 29 layers Land-Surface: PX LSM PBL: ACM2 Cloud Physics: Morrison Cumulus: Kain-Fritsch, not for 4km Shortwave: RRTMg, or CAM Longwave: RRTMg, or CAM Chemical Transport Model CMAQ Modeling System: Photochemistry: CB05 59 organic and inorganic species, 156 chemical reactions Aerosol module: AE6 3 lognormal modes, organic and inorganic Emission: SMOKE In-line emission for biogenic species AQPREP Prepares virtual CMAQ compatible input met. files Coupler CMAQ-mixactivate: cloud drop, ice number conc. Direct forcing: Aerosol size, composition, conc.

  5. Model Description (Configuration) • China WRF-CMAQ simulations and emissions • WPS runs: NCEP/NCAR Reanalysis • Surface analysis nudging: • NCEP ADP Operational Global Surface Obs • Emissions over the eastern Asia: • Anthropogenic: Emissions Database for Global Atmospheric Research (EDGAR): HTAP V2 (0.10*0.10) • Biogenic VOC: GEIA (Global Emission Inventory Activity)

  6. Model domain 36km domain over eastern Asia 12km domain over eastern China 4km domain over BTH region Simulation period: 2013

  7. Results (Preliminary) • PMfine, CO and SO2, and NO2missions over the domain SO2 PMfine CO NO2

  8. Results (Preliminary) • Model simulation results over the domain (1/2/2013) SO2 PM2.5 NOx CO

  9. Results (Preliminary) Observations of PM2.5in Beijing PM2.5 observations at 10 sites in Beijing: 1/20/2013-5/27/2014 Weekly heavy haze: 2/20-2/27/2014

  10. Results (Preliminary) Observations of PM2.5in Beijing PM2.5 Study period: 2/8-2/27/2014 Weekly heavy haze: 2/20-2/27/2014 PM10 SO2 CO NO2 O3

  11. Results (Preliminary) Impact of local and transport sources on the haze formation in Beijing

  12. The results of PM2.5in Beijing (Preliminary) Air mass back trajectory cluster analysis Clean (PM2.5<75 mg m-3) Study period: 2/8-2/27/2014 Weekly heavy haze: 2/20-2/27/2014 Five clusters: S (South), E (East), W-NW (West-NouthWest), NW (NorthWest) and N (North). All Data Haze (PM2.5:75-200 mg m-3) Heavy Haze (PM2.5>200 mg m-3)

  13. The results of PM2.5in Beijing (HYSPLIT) Air mass back trajectory cluster analysis

  14. The results of PM2.5in Beijing: PSCF and CWT analyses CWT PSCF Clean PM2.5<75 mg m-3 Haze PM2.5:75-200 mg m-3 Heavy Haze PM2.5>200mg m-3

  15. Contacts: Brian K. Eder email: eder@hpcc.epa.gov www.arl.noaa.gov/ www.epa.gov/asmdnerl

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