One question that defines an effective air quality management plan is – what is the contribution of various sources to the ambient PM2.5 concentrations?
Using the WRF-CAMx modeling system, a series of simulations are conducted every day to answer this question, based on a detailed spatially and temporally resolved emissions inventory. The hourly average source contributions (presented below) is a modeled average for all the 0.25 x 0.25 degree grids (~25 km x 25 km) overlapping in each of the districts. A map showing the geographical extent of each of the districts is presented here (along with a kml file for reference and use). The modeling domain includes 640 districts covering 36 states (including Union Territories). The district designations are as per the 2011 census board specifications. First select the state and then a district from the second drop down menu.
What is included in the clubbed source categories is described below and more information on the emission sources is available here. If you click on any of the source categories in the legend, it will allow you to minus that contribution and see what could be the PM2.5 concentrations without its contribution. If you click on it again, the source will added back to the chart.
The data fields are updated everyday at ~7:00 PM local time.
- DUST.ERO = contribution of wind blown dust from dry and arid regions, dependent of hourly meteorological conditions
- OPEN.FIRES = contribution of open biomass burning (both agricultural lands and forest areas), a seasonal affair linked to dry conditions and agricultural clearing patterns (supported via satellite feeds)
- TRANS.PASS = contribution of passenger transport (2-3-4-wheelers, buses, and aviation)
- TRANS.FRGT = contribution of freight transport (heavy and light trucks, non-road vehicles, and shipping)
- RD.DUST = contribution of re-suspended dust on the roads and construction activities
- PP.DGS = contribution of power plants and in-situ diesel generator sets
- INDUS = contribution of industrial activities
- HOUS.HLD = contribution of domestic cooking, space heating, water heating, and lighting
- WST.BURN = contribution of open waste burning
- NATURAL = contribution of biogenic and seasalt emissions, dependent of hourly meteorological conditions
- NON-INDIA = contribution of anthropogenic emissions from outside India (and within the modeling domain of this study); this portion of the emissions are extracted from global emissions inventories
- BOUNDARY = contribution of initial and boundary conditions; initial conditions are residuals from the previous days simulation and boundary conditions are extracted from EU-CAMS global forecasts
Back to the India air quality forecasting page. Additional data fields from the forecasting system
- animations of hourly wind, temperature, precipitation, and mixing heights
- daily (24 hour) average concentrations
- animations of hourly average concentrations
- hourly time series at the district level
- hourly time series for select locations
- modeled source contributions to hourly PM2.5 concentrations
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