A bulk-mass-modeling-based method for retrieving particulate matter pollution using CALIOP observations
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Published:2019-03-18
Issue:3
Volume:12
Page:1739-1754
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Toth Travis D., Zhang JianglongORCID, Reid Jeffrey S., Vaughan Mark A.ORCID
Abstract
Abstract. In this proof-of-concept paper, we apply a bulk-mass-modeling method using
observations from the NASA Cloud-Aerosol Lidar with Orthogonal Polarization
(CALIOP) instrument for retrieving particulate matter (PM) concentration over
the contiguous United States (CONUS) over a 2-year period (2008–2009).
Different from previous approaches that rely on empirical relationships
between aerosol optical depth (AOD) and PM2.5 (PM with particle
diameters less than 2.5 µm), for the first time, we derive PM2.5
concentrations, during both daytime and nighttime, from near-surface CALIOP
aerosol extinction retrievals using bulk mass extinction coefficients and
model-based hygroscopicity. Preliminary results from this 2-year study
conducted over the CONUS show a good agreement (r2∼0.48;
mean bias of −3.3 µg m−3) between the averaged nighttime
CALIOP-derived PM2.5 and ground-based PM2.5 (with a lower r2
of ∼0.21 for daytime; mean bias of −0.4 µg m−3),
suggesting that PM concentrations can be obtained from active-based
spaceborne observations with reasonable accuracy. Results from sensitivity
studies suggest that accurate aerosol typing is needed for applying CALIOP
measurements for PM2.5 studies. Lastly, the e-folding correlation
length for surface PM2.5 is found to be around 600 km for the entire
CONUS (∼300 km for western CONUS and ∼700 km
for eastern CONUS), indicating that CALIOP observations, although sparse in
spatial coverage, may still be applicable for PM2.5 studies.
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference61 articles.
1. Anderson, T. L., Charlson, R. J., Winker, D. M., Ogren, J. A., and Holmén,
K.: Mesoscale
Variations of Tropospheric Aerosols, J. Atmos. Sci., 60, 119–136,
https://doi.org/10.1175/1520-0469(2003)060<0119:MVOTA>2.0.CO;2, 2003. 2. Atwood, S. A., Reid, J. S., Kreidenweis, S. M., Cliff, S. S., Zhao, Y.,
Lin, N.-H., Tsay, S.-C.,
Chu, Y.-C., and Westphal, D. L.: Size resolved measurements of springtime aerosol
particles over the northern South China Sea, Atmos. Environ., 78,
134–143, https://doi.org/10.1016/j.atmosenv.2012.11.024, 2013. 3. Campbell, J. R., Tackett, J. L., Reid, J. S., Zhang, J., Curtis, C. A., Hyer, E. J.,
Sessions, W. R., Westphal, D. L., Prospero, J. M., Welton, E. J., Omar, A. H.,
Vaughan, M. A., and Winker, D. M.: Evaluating nighttime CALIOP 0.532 µm
aerosol optical depth and extinction coefficient retrievals, Atmos. Meas. Tech., 5, 2143–2160, https://doi.org/10.5194/amt-5-2143-2012, 2012. 4. Charlson, R. J., Ahlquist, N. C., and Horvath, H.: On the generality of
correlation of atmospheric
aerosol mass concentration and light scatter, Atmos. Environ., 2,
455–464, https://doi.org/10.1016/0004-6981(68)90039-5, 1968. 5. Chew, B. N., Campbell, J. R., Hyer, E. J., Salinas, S. V., Reid, J. S.,
Welton, E. J., Holben, B. N.,
and Liew, S. C.: Relationship between aerosol optical depth and particulate
matter over Singapore: Effects of aerosol vertical distributions, Aerosol
Air Qual. Res., 16, 2818–2830,
https://doi.org/10.4209/aaqr.2015.07.0457, 2016.
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