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| Titel |
Toward enhanced capability for detecting and predicting dust events in the western United States: the Arizona case study |
| VerfasserIn |
M. Huang, D. Tong, P. Lee, L. Pan, Y. Tang, I. Stajner, R. B. Pierce, J. McQueen, J. Wang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 21 ; Nr. 15, no. 21 (2015-11-12), S.12595-12610 |
| Datensatznummer |
250120158
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| Publikation (Nr.) |
 copernicus.org/acp-15-12595-2015.pdf |
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| Zusammenfassung |
| Dust aerosols affect human life, ecosystems, atmospheric chemistry and
climate in various aspects. Some studies have revealed intensified dust
activity in the western US during the past decades despite the weaker dust
activity in non-US regions. It is important to extend the historical dust
records, to better understand their temporal changes, and to use such
information to improve the daily dust forecasting skill as well as the
projection of future dust activity under the changing climate. This study
develops dust records in Arizona in 2005–2013 using multiple observation
data sets, including in situ measurements at the surface Air Quality System
(AQS) and Interagency Monitoring of Protected Visual Environments (IMPROVE)
sites, and level 2 deep blue aerosol product by the Moderate Resolution
Imaging Spectroradiometer. The diurnal and inter-annual variability of
identified dust events are shown related to observed weather patterns (e.g.,
wind and soil moisture) and surface conditions (e.g., land cover type and
vegetation conditions), suggesting a potential for use of satellite soil
moisture and land products to help interpret and predict dust activity.
Backtrajectories computed using NOAA's Hybrid Single Particle Lagrangian
Integrated Trajectory (HYSPLIT) model indicate that the Sonoran and
Chihuahuan deserts are important dust source regions during identified dust
events in Phoenix, Arizona. Finally, we assess the impact of a recent strong
dust event on western US air quality, using various observational and
modeling data sets, during a period with a stratospheric ozone intrusion
event. The capability of the current US National Air Quality Forecasting
Capability (NAQFC) Community Multi-scale Air Quality (CMAQ) modeling system to represent the magnitude and the
temporal variability of aerosol concentrations is evaluated for this event.
Directions for integrating observations to further improve dust emission
modeling in CMAQ are also suggested. |
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