AIR POLLUTION ASSESSMENT

CONTENT

Case Study

• GIS Based• RS technology for Detecting Air pollution

Satellite overview

• Terra• Aqua • ERS2

Discussion• Recommendations….

GIS BASED

Article Name: Urban air pollution patterns, land use, and thermal landscape: An examination of the linkage using GIS

Area: Guangzhou

Specification: Use Ground Measurements. Use Landsat data for land use and thermal landscape combined with maps. Use GIS for analyzing and Correlation Estimation>> Positively Correlated. Thermal IR imagery could play a unique role in monitoring and modeling atmospheric

pollution.

GIS BASED

Article Name: Satellite remote sensing of particulate matter and air quality assessment over global cities

Area: global urban areas spread over 26 locations

Specification: Use MODIS data and Ground measurement. excellent correlation between the bin-averaged daily mean satellite and ground based

values with a linear correlation coefficient of 0.96. Using meteorological and other ancillary datasets, and assess the effects of wind

speed and cloud cover.

GIS BASED

Article Name: Application of hyperspectral Remote sensing and GIS for assessing forest health and air pollution.

Area: Sierra Nevada of California, USA and the Pyrenees of Catalonia, Spain

Specification: Integration of RS and GIS Monitoring Forest Species-level classifications of AVIRIS and CASI hyperspectral imagery were all near 80%

overall accuracy

GIS BASED

Article Name: Air pollution monitoring and GIS modeling: a new use of nanotechnology based solid state gas sensors.

Area: Thailand, especially in Bangkok.

Specification: Use nanotechnology. Real Time (use Wireless GIS). Use Ground measurements, Inexpensive sensors (PDA linked through Bluetooth

communication tools and GPS , will allow rapid dissemination of information on pollution levels at multiple sites simultaneously)

RS TECHNOLOGY FOR DETECTING AIR POLLUTION Article Name: Air quality evaluation on an urban scale based on

MODIS satellite images. Area: Beijing Specification:

Use MODIS sensor. Urban-scale air quality monitoring. (Resolution: 1km) The 1 km AOT data are validated by using AOT measurements from two

AERONET stations. Then the validated 1 km AOT data are compared with ground-based PM2.5

mass concentration.

RS TECHNOLOGY FOR DETECTING AIR POLLUTION Article Name: Applications of MODIS satellite data and products for

monitoring air quality in the state of Texas

Area: Texas

Specification: Use MODIS sensor. monitored over land and ocean surfaces. detect and track the migration of pollutants.

RS TECHNOLOGY FOR DETECTING AIR POLLUTION Article Name: A Simplified high resolution MODIS Aerosol Retrieval

Algorithm (SARA) for use over mixed surfaces.

Area: Hong Kong

Specification: Use MODIS sensor. Retrieval Algorithm for use over Hong Kong at high (500 m) spatial resolution.

RS TECHNOLOGY FOR DETECTING AIR POLLUTION Article Name: Ability of MODIS data in qualitative and quantitative

air quality analysis in urban area. (in Persian)

Area: Tehran

Specification: Detecting aerosols. Use MODIS –Terra and Aqua satellite - data (10 km resolution) Use MOD L1 and MOD L2. Use ground station measurements.

RS TECHNOLOGY FOR DETECTING AIR POLLUTION Article Name: A Quick method to estimate aerosols density with MODIS data (In

Persian)

Area: Tehran

Specification: Use Linear Spectral Decomposition to separate the reflectance between ground surfaces and

aerosols. Use MODIS –Terra and Aqua satellite - data (250 km resolution) Use MOD L1 and MOD L2. Use ground station measurements. Inability to comparison between ground station measurements and RS results.

SATELLITE OVERVIEW

Satellite Name: Terra (MOPITT, MODIS, MISR)

Specification: Terra satellite in December 1999 significantly expanded scientific perspective

about the scale of tropospheric pollution. The MOPITT instrument onboard Terra is a nadir-viewing gas correlation

radiometer operating in the 4.7 µm band of carbon monoxide (22 km * 22 km) Aerosol retrievals over land from MODIS are described originally by Kaufman et

al. (1997).

SATELLITE OVERVIEW

Satellite Name: Aqua (MODIS, AIRS)

Specification: AIRS is a cross-track scanning spectrometer that covers the 3.7–16 µm

spectral range. 13.5 km nadir field-of-view. CO retrievals are conducted at 4.7 µm with a spatial resolution of 45 km

at nadir. Volcanic SO2 also is being retrieved.

SATELLITE OVERVIEW

Satellite Name: ERS-2 (GOME-1) - 1995 to June 2003

Specification: Satellite remote sensing of the lower troposphere effectively began in 1995 with

the launch of the GOME-1. GOME-1 is a nadir-viewing grating spectrometer that measures solar backscatter

with broad spectral coverage (230–790 nm) and moderate resolution (0.2–0.4 nm). Spatial resolution of a ground scene is variable but is typically (40 km *320 km). retrievals of tropospheric NO , HCHO, SO2 and tropospheric O3 with sufficient

accuracy.

DISCUSSION Scale? Regional or Urban Area ? (Resolutions!!)

Data? (RS data and Ground station) or (RS data) or (Ground station)

Validating? (Ground measurement as Reference map) or (Land Use as Reference map)

TNX FOR YOUR ATTENTION