1 Progress Report to MDE June 7, 2010 Dr. Konstantin Vinnikov, Acting State Climatologist for...
-
date post
22-Dec-2015 -
Category
Documents
-
view
216 -
download
0
Transcript of 1 Progress Report to MDE June 7, 2010 Dr. Konstantin Vinnikov, Acting State Climatologist for...
1
Progress Report to MDEJune 7, 2010
Dr. Konstantin Vinnikov, Acting State Climatologist for Maryland
Prof. Russell Dickerson, Department of Atmospheric and Oceanic Science
University of Maryland at College Park, MD
Observed 2008-2010Diurnal-Seasonal Variation of
PM2.5 in Maryland
Our goal is to depict the seasonal and daily cycles in SO2 and PM2.5 and to reveal and evaluate effects of changes in Maryland Power Plants SO2 emissions on PM2.5.
2008-10 OBSERVED VARIATIONS OF PM2.5 AT MD STATIONS
DIURNAL-SEASONAL PATTERN
2008-10 OBSERVED VARIATIONS OF SO2 AT MD STATIONS
DIURNAL-SEASONAL PATTERN
DIURNAL-SEASONAL PATTERNMD Power Plants SO2 Emissions
PM2.5 vs. SO2
OBSERVED PM2.5 OBSERVED SO2
MD POWER PLANTS SO2 EMISSIONS
PM2.5
SO2
OBSERVATIONS 2008-10
Diurnal/Seasonal Variation and Variability of PM2.5 Maryland, Surface Stations Hourly Observations 2008-2010
Take home messages:
1. The residual layer and PBL dynamics play a major role in the daily cycle of surface concentrations of SO2 and PM2.5.
2. Concentrations of SO2 peak in mid day because the major sources are aloft and vertical mixing is faster in daylight hours.
3. PM2.5 shows a major summer maximum and a minor winter maximum.
4. The winter maximum occurs at night because much of the PM is primary.
5. The summer max is broad-based because much of the PM is secondary and is transported aloft.