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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.

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Presentation on theme: "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."— Presentation transcript:

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 Yu 1, Qingyu Zhang 1, Renchang Yan 1, Pengfei Li 1, Bixin Chen 1, Yanqun Li 1, Weiping Liu 1, David Wong 2, Kiran Alapaty 2, Jon Pleim 2 and Rohit Mathur 2 1 Research Center for Air Pollution and Health, College of Environmental and Natural Resources, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China. 2 Atmospheric Modeling and Analysis Division, NERL, U.S. EPA, RTP, NC 27711, USA

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

3 Air pollution and heavy haze have become China’s biggest environmental problem Introduction (Motivation) AQI on 10/24/2014, 8:00, major pollutant is PM 2.5 Beijing-Tianjin- Hebei (BTH) regions Superior (green), good (yellow), slight （ Orange), moderate (red), severe (purple), serious (maroon)

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6 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 Coupler 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 CMAQ-mixactivate: cloud drop, ice number conc. Direct forcing: Aerosol size, composition, conc. Two-way coupled WRF-CMAQ modeling System (Interaction and feedback) (Yu et al., 2014) Model Description ( Configuration )

7  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 (0.1 0* 0.1 0 )  Biogenic VOC: GEIA (Global Emission Inventory Activity)

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

10  Results (Preliminary) PMfine, CO and SO 2, and NO 2 missions over the domain PMfine NO 2 CO SO 2

11  Results (Preliminary) Model simulation results over the domain (1/2/2013) NOx PM 2.5 CO SO 2

12 Results (Preliminary) Observations of PM 2.5 in Beijing Weekly heavy haze: 2/20-2/27/2014 PM 2.5 observations at 10 sites in Beijing: 1/20/2013-5/27/2014

13 Results (Preliminary) Observations of PM 2.5 in Beijing Study period: 2/8-2/27/2014 Weekly heavy haze: 2/20-2/27/2014 PM 2.5 PM 10 SO 2 CO NO 2 O3O3

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

15 The results of PM 2.5 in Beijing (Preliminary) Air mass back trajectory cluster analysis Clean (PM 2.5 <75  g m -3 ) Haze (PM 2.5 :75-200  g m -3 ) Heavy Haze (PM 2.5 >200  g m -3 ) Five clusters: S (South), E (East), W-NW (West- NouthWest), NW (NorthWest) and N (North). Study period: 2/8-2/27/2014 Weekly heavy haze: 2/20-2/27/2014 All Data

16 The results of PM 2.5 in Beijing (HYSPLIT) Air mass back trajectory cluster analysis Percent (%) Mean_PM 2.5 ( μg m −3 ) P_Percent (%) WS (m s -1 ) All data N 16.115.930.1 8.7 N-NW 7.064.162.9 4.2 NW 3.618.330.1 15.4 E 30.1170.9136.7 1.3 S 42.5268.460.2 2 Clean PM 2.5 <75  g m -3 N74.215.2619.1 N-NW7.554.3215.6 NW18.318.33115.4 Haze PM 2.5 :75-200  g m -3 N4.322.5504 N-NW16.466.779.03.8 E43.595.3141.91.3 S35.8142.5749.12.5 Heavy Haze PM 2.5 >200  g m -3 E34.4318.5634.41.3 S65.6291.8165.61.8

17 The results of PM 2.5 in Beijing: PSCF and CWT analyses PSCF CWT Clean PM 2.5 <75  g m -3 Haze PM 2.5 :75-200  g m -3 Heavy Haze PM 2.5 >200  g m -3

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

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