Aerosols
; Air quality
; Boundary layers
; Optical radar
; Orbits
; Aerosol transport model
; Asian dust
; Particulate Matter
; Planetary boundary layers
; Satellite measurements
; Single scattering albedo
; Spectral dependences
; Transport
; Dust
; AERONET
; aerosol
; air quality
; albedo
; CALIPSO
; coastal zone
; dust
; ground-based measurement
; lidar
; planetary atmosphere
; satellite data
; air quality
; Article
; asian dust
; boundary layer
; controlled study
; depolarization
; dry deposition
; dust
; environmental impact
; optical depth
; particulate matter
; planetary boundary layer
; priority journal
; seashore
; signal noise ratio
; smoke
; United States
; wet deposition
; United States
Scopus学科分类:
Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
The transport of an intense trans-Pacific Asian dust episode to the Northeast United States (U.S.) is studied using a synergistic suite of observations and models including a ground-based lidar, AERONET-sunphotometer, satellite measurements and global aerosol transport model for New York City (40.821�N, 73.949�W). During the dust intrusion on March 17-19, 2010, the multi-wavelength lidar observations indicate dense dust plumes (~80% of total column AOD) located between 3 and 9km altitudes with the lower layer mixing toward the planetary boundary layer (PBL). The column AOD shows a significant increase from 0.08 to 0.38at 532-nm while the Angstrom exponent indicates a decrease from 1.3 to 0.7. The linear particle depolarization ratio is estimated to be 0.1-0.15 and the single-scattering-albedo shows the dust-like spectral dependence with the value of 0.9-0.95at 440-nm. The NOAA-NCEP reanalysis and HYSPLIT model indicate that this long-range transport is driven by the strong western jets and travels for 6 days to arrive the U.S. east coast versus the western and northern U.S. Both the NAAPS aerosol transport model and satellite CALIPSO observations for multiple orbits clearly illustrate the dust-dominated aerosol along the transport path. In addition, coincident increase of both particulate matter (PM) and fine soil concentrations indicate the potential impact of transported dust on the air quality that is found to be associated with a large area of sinking air along the U.S. east coast. � 2015 Elsevier Ltd.
Optical Remote Sensing Lab and NOAA-CREST, City College of New York (CCNY)NY, United States
Recommended Citation:
Wu Y,, Han Z,, Nazmi C,et al. A trans-Pacific Asian dust episode and its impacts to air quality in the east coast of U.S.[J]. Atmospheric Environment,2015-01-01,106