Observing and understanding the Southeast Asian aerosol system by remote sensing: An initial review and analysis for the Seven Southeast Asian Studies (7SEAS) program

Monitoring spatio-temporal aerosol patterns over Pakistan based on MODIS, TOMS and MISR satellite data and a HYSPLIT model

. The Multi-angle Imaging SpectroRadiometer (MISR)
instrument has been operational on the National Aeronautics and Space
Administration (NASA) Earth Observing System (EOS) Terra satellite since
early 2000, creating an extensive data set of global Earth observations.
Here we introduce the latest version of the MISR aerosol products. The level
2 (swath) product, which is reported on a 4.4 km spatial grid, is designated as version 23 (V23) and contains retrieved aerosol optical depth (AOD) and
aerosol particle property information derived from MISR's multi-angle
observations over both land and water. The changes from the previous version
of the algorithm (V22) have significant impacts on the data product and its
interpretation. The V23 data set is created from two separate retrieval
algorithms that are applied over dark water and land surfaces, respectively.
Besides increasing the horizontal resolution to 4.4 km compared with the
coarser 17.6 m resolution in V22 and streamlining the format and content,
the V23 product has added geolocation information, pixel-level uncertainty
estimates, and improved cloud screening. MISR data can be obtained from the
NASA Langley Research Center Atmospheric Science Data Center at https://eosweb.larc.nasa.gov/project/misr/misr_table (last access: 11 October 2019). The
version number for the V23 level 2 aerosol product is F13_0023. The level 3 (gridded) aerosol product is still reported at
 0.5 ∘ × 0.5 ∘ spatial resolution with results aggregated
from the higher-resolution level 2 data. The format and content at level 3
have also been updated to reflect the changes made at level 2. The level 3
product associated with the V23 level 2 product version is designated as
F15_0032. Both the level 2 and level 3 products are now
provided in NetCDF format.

Introducing the 4.4 km spatial resolution Multi-Angle Imaging SpectroRadiometer (MISR) aerosol product

Aerosol optical depths (AODs) from MODIS and MISR onboard the Terra satellite are assessed by comparison with measurements from four AERONET sites located in northern China for the period 2006–2009. The results show that MISR performs better than MODIS at the SACOL and Beijing sites. For the Xianghe and Xinglong sites, MODIS AOD retrievals are better than those of MISR. Overall, the relative error of the Angstrom exponent from MISR compared with AERONET is about 14%, but the MODIS error can reach 30%. Thus, it may be better to use the MISR Angstrom exponent to derive wavelength-dependent AOD values when calculating the aerosol radiative forcing in a radiative transfer model. Seasonal analysis of AOD over most of China shows two main areas with high aerosol loading: the Taklimakan Desert region and the southern part of North China and northern part of East China. The locations of these two areas of high aerosol loading do not change with season, but the AOD values have significant seasonal variation. The largest AOD value in the Taklimakan appears in spring when the Angstrom exponents are the lowest, which means the particle radii are relatively large. Over North and East China, the highest aerosol loading appears in summer. The aerosol particles are smallest in summer over both high-AOD areas.

/pdf/spatial-and-temporal-distribution-of-modis-and-misr-aerosol-ywdmmkyruf.pdf

Spatial and temporal distribution of MODIS and MISR aerosol optical depth over northern China and comparison with AERONET

Aerosol climatology and discrimination of aerosol types retrieved from MODIS, MISR and OMI over Durban (29.88°S, 31.02°E), South Africa

Spatial characteristics of the difference between MISR and MODIS aerosol optical depth retrievals over mainland Southeast Asia

Conventional algorithms for polygon rasterization are typically designed to maintain non-topological characteristics. Consequently, topological relationships, such as the adjacency between polygons...

A topology-preserving polygon rasterization algorithm

Biomass burning is a major source of black carbon aerosols. These aerosols have negative human health impacts and can affect the radiation budget and climate both directly and indirectly. Uncertainty regarding the contribution of biomass burning to the concentration of aerosols is higher in Southeast Asia than in some other regions of substantial biomass burning because of other sources of pollution such as significant fossil fuel combustion. The shifting agricultural tradition is still evident in the region. Significant expansion of cash crop production is also associated with biomass burning, as is the seasonal burning of crop residue. The effects of such land-use processes extend into the atmosphere, and localized events have regional and global implications for air-pollution-related health effects and climate. This article synthesizes the issue of biomass burning and aerosols in the context of land-use practices in Southeast Asia and makes suggestions of how to use available data sources in an integra...

The relationships between biomass burning, land-cover/-use change, and the distribution of carbonaceous aerosols in mainland Southeast Asia: a review and synthesis

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Papers

Spatial characteristics of the difference between MISR and MODIS aerosol optical depth retrievals over mainland Southeast Asia

A topology-preserving polygon rasterization algorithm

The relationships between biomass burning, land-cover/-use change, and the distribution of carbonaceous aerosols in mainland Southeast Asia: a review and synthesis