Relationship analysis of PM<sub>2.5</sub> and boundary layer height using an aerosol and turbulence detection lidar
<p>The atmospheric boundary layer height (BLH) is a key parameter in weather forecasting and air quality prediction. To investigate the relationship between BLH and air pollution under different conditions, a compact micro-pulse lidar integrating both direct-detection lidar (DDL) and coherent...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-06-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/3303/2019/amt-12-3303-2019.pdf |
| Summary: | <p>The atmospheric boundary layer height (BLH) is a key
parameter in weather forecasting and air quality prediction. To investigate the
relationship between BLH and air pollution under different conditions, a
compact micro-pulse lidar integrating both direct-detection lidar (DDL) and
coherent Doppler wind lidar (CDWL) has been built. This hybrid lidar is operated
at 1.5 <span class="inline-formula">µm</span>, which is eye-safe and made of all-fibre components. The
BLH can be determined from aerosol density and vertical wind independently.
During a 45 <span class="inline-formula">h</span> continuous observation in June 2018, the stable boundary layer,
residual layer and convective boundary layer are identified. The fine structure
of the aerosol layers, drizzles and vertical wind near the cloud base are also
detected. In comparison, the standard deviation between BLH values derived
from DDL and CDWL is 0.06 <span class="inline-formula">km</span>, indicating the accuracy of this work. The
retrieved convective BLH is a little higher than that from ERA5 reanalysis
due to different retrieval methods. Correlation between different BLH and
PM<span class="inline-formula"><sub>2.5</sub></span> is strongly negative before a precipitation event and becomes
much weaker after the precipitation. Different relationships between PM<span class="inline-formula"><sub>2.5</sub></span>
and BLH may result from different BLH retrieval methods, pollutant sources
and meteorological conditions.</p> |
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| ISSN: | 1867-1381 1867-8548 |