What Is Polluting Delhi's Air? A Review from 1990 to 2022

This supplementary information for open use is part of the publication, "What is Polluting Delhi's Air? A Review from 1990 to 2022" This paper offers insight by reviewing the influence of Delhi’s urban growth since 1990 on pollution levels and sources and the evolution of technical, institutional, and legal measures to control emissions in the National Capital Region of Delhi..

The databases and the documents uploaded here are the following

Available ambient air quality monitoring data for Delhi

cpcb_delhi_data_2006-2018-raw-cleaned.rar - This is CPCB data from 2006 to 2018 as raw and cleaned files. Raw data is at 15 min internals, which needs some qa/qc checks before use. The cleaned data is hourly. For data cleaning, all null points, all negative points, integer values equal to 9999, 999, 1985, 985, 915, 515, 1200, 1000, 2000, 380, 3800, 675, and 718 were excluded. These values were recognized after searching the raw data for patterns. Instances of sudden jumps, which occur due to malfunctioning of instruments were recognized using running means. 

1999-2006-CPCB ITO-Hourly.xlsx - This is hourly data from the ITO station only

NAMP data for 2011 to 2015 is hosted here - https://doi.org/10.5281/zenodo.6925200

Graph-Composite-1989-2022.xlsx -- This is a composite of all the annual average data along with the worksheet to make the image in the preview.

Support documents

1997-CPCB-White-Paper-on-Delhi-Air-Pollution.pdf

2011-CPCB-Source-Apportionment-Report-Extracts.pdf

2015-04 Infograph Delhi Banning Vehicles to Control AP.jpg

2016-03 Inforgraph Delhi Odd Even Emissions.jpg

2019-09-Infograph-Delhi-Odd-Even-Buses.jpg

NCAP-Planned-Source-Apportionment-studies.pdf

SIM-41-2021-Data-Resources-for-Energy-Emissions-Analysis.pdf

Reanalysis fields from WUSTL

wustl_delhi_1998-2021.csv - This data is at 0.01 degree resolution for the city airshed. The long-lat represent the grid mid-point. 

wustl_delhi_1998-2021.png - This is a composite image of data extracted for all the years

Satellite data extracts

satellite-modis_terra_aod_delhi-covidperiod.xlsx

satellite-modis_terra_aod_delhi-longerperiod.xlsx

satellite-omi_no2_delhi-covidperiod.xlsx

satellite-tropomi_o3_delhi.xlsx

satellite-tropomi_so2_delhi.xlsx