India – Air Quality Forecasts


Air pollution has emerged as a major environmental challenge in Indian cities and across the states. Complexity of the problem is due to multiplicity of emission sources, such as, industries, automobiles, generator sets, domestic fuel burning, road side dusts, construction activities, etc and a vibrant meteorology across climatic zones. Our India air quality forecasting system interjects contributions of pollution for national, regional and urban areas, to better support a long-term air quality management plan and a short-term health alert system. Various products from the forecasting system include

PM2.5

24-hr average for Particulate Matter (less than 2.5 micron-m) (PM2.5)

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PM10

24-hr average for Particulate Matter (less than 10 micron-m) (PM10)

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SO2

24-hr average for Sulfur Dioxide (SO2)

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NO2

24-hr average for Nitrogen Dioxide (NO2)

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CO

24-hr average for Carbon Monoxide (CO)

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Hourly Anime

Animations of hourly concentration maps for the next 72 hours

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Fire Counts

24-hr Open fires map for the Indian Subcontinent (updated with VIIRS feed every 3 hours)

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Dust Stroms

Simulated Dust Storm Zones for the Next Three Days

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Our forecasting system also includes a high-resolution medium-range meteorological system for the next 72-hours, processed through 3D-WRF meteorological model and the GFS meteorological fields . The modeling domain covers the Indian subcontinent at a temporal resolution of 1 hour. All the simulation fields are updated everyday at ~17:00 local time.

Rain

Total Precipitation – Daily

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Temp (day)

Average daytime near ground (2m) temperature

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Temp (night)

Average nighttime near ground (2m) temperature

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Winds (day)

Average daytime near surface (10m) winds

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Winds (night)

Average nighttime near surface (10m) winds

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Met Anime

72-hr animations for surface wind speeds and direction, precipitation, surface temperature, and mixing layer height

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WRF model simulated summary of these meteorological parameters by district for the year 2015, is available for browsing and downloading here.

Data above is from stations operated and maintained by the Central Pollution Control Board (CPCB) and the State Pollution Control Boards. All the data is available on CPCB website. A secondary source to download archived data is @ openaq.org. The color code represents the Air Quality Index (AQI) scales of India. More on the air quality monitoring in India is here.

PM2.5 forecasts by State Forecasts (browse here)

India Air Quality Forecasts

Modeled PM2.5 source contributions by State (browse here)

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An effective air quality management requires reliable information on ambient air pollution levels with substantial spatial and temporal coverage. Air quality data are generally available through air quality measurement campaigns; which is also an ideal database to statistically forecast pollution levels in the next 3-4 days, based on past experiences. However, this database is not enough to explain the highs and the lows, source contributions, and spatial patterns in the observed trends. As part of the forecasting system, we are able to cover this gap via emissions inventory development, dispersion modeling, and source apportionment.