MODIS Aerosols Observations over Cities Long Term Trends and Air Quality Gupta Pawan 12 Robert Levy 2 et al MODIS Dark Target Aerosol Team 1 GESTAR Universities Space Research Associations ID: 564084
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Slide1
High Resolution
MODIS Aerosols Observations
over Cities: Long Term Trends and Air Quality
Gupta Pawan1,2 , Robert Levy2, et al., (MODIS Dark Target Aerosol Team)1GESTAR Universities Space Research Associations2 NASA Goddard Space Flight Center, Greenbelt, MD, USASlide2
Global Aerosol retrieval from MODIS
LAND
Dark Target (“DT” ocean and land) Operational at 3 and 10 km from both Terra & Aqua MODIS
MAM 2013EE%= ±(0.05 + 15%)LandZonal average 60°N-60°S
Figure by: V.
ManoharanSlide3
Urban Retrievals in MODIS DTA
Significant reduction in errors in AOD retrievals from MODIS have been achieved using C6U (or C6_Urban) Algorithm
(DISCOVER-AQ,
Summer 2011)
Urban %
Gupta et al., 2015, submitted to AMT
MODIS-AQUA Data from CONUS RegionSlide4
High resolution daily & monthly AOD Data
Deep_Dark_Combined_AOD from Collection 6
Similar to Level 3 product but at 0.1x0.1 degree resolutionDaily & Monthly statistics (i.e. mean, median, std, count, etc.)Data corresponding to good quality flags are only considered.Terra and AquaNetcdf formatData can be made available to anyone, please contact at pawan.gupta@nasa.govSlide5
Aerosol TrendsSlide6Slide7
Source: LSE
Cities based on United Nations World Urbanization Prospects, 2014 Revision
Urban PopulationPopulation in the 600 cities will grow an estimated 1.6 times as fast as population of the world as whole.It is projected that by 2025, these 600 cities will be home to:25% of the world’s working-age population
15% of the world’s children aged below 15 years.35% of world’s older aged above 65 years.Health effects of air pollution varies for different age groupsSlide8
Aerosols Trends over Cities
183 largest cities
where ~16% world populations lives
MODIS Deep Blue Dark Target Combined Product with highest quality from 2003 to 2014 from Aqua has been used to explore long term trend in the region.Each city has its own story about pollution Slide9
Seasonal Aerosol Trends over Indian Sub Continent
MEAN AOD (2003-2007)
MEAN AOD (2008-2014)(2008-2014) – (2003-2007)Pre Monsoon - FMAM
Post Monsoon - ONDJSlide10
Regional Contrast in Aerosols Trends
IGP
is highly influenced by mineral dust during premonsoon and sea salt during monsoon, while during postmonsoon fine mode aerosols dominate
2003-20072008-2014PremonsoonPostmonsoonAerosol Optical Depth at 550 nmPremonsoonPostmonsoonSlide11
Top 20 Cities with Increasing Trends in AOD
Indian CitiesSlide12
MODIS-AQUA
Aerosol Optical Depth over Indian CitiesSlide13
Delhi – The City in the NewsSlide14
Delhi – The City in the News
Measured at US EmbassySlide15
Delhi – The City in the News
Measured at US EmbassySlide16
Delhi – The City in the News
Measured at US Embassy
MODIS Image, Nov 30
th, 2015Slide17
Aerosol Transport Paths to Delhi
Premonsoon
Dust Transport
Postmonsoon Smoke & Pollution
Delhi - Jun
Jaipur - Jan
Delhi - Jan
Jaipur - Jun
Coarse
fine Slide18
Aerosol Trends – Future Directions
Aerosol trends over citiesAerosol measurements -
SatelliteLand use change (urban vs rural) - SatelliteEnergy UsagePopulation growthEconomical growthLocal vs Transport - SatelliteMeteorological conditions
Many more …