Atmospheric pollutant deposition over a south central North Carolina cornfield

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:617685

Saxena, V K; Aneja, V ^[1]; DeFelice, T P ^[2]; Wesely, M L ^[3]

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1. North Carolina State Univ., Raleigh, NC (United States)
2. Univ. of Wisconsin, Milwaukee, WI (United States)
3. Argonne National Laboratory, IL (United States)

The National Oceanic and Atmospheric Administration Atmospheric Turbulence and Diffusion Division (ATDD) model was used to infer the dry deposition velocities of gaseous and particle pollutants, such as O{sub 3}, SO{sub 2}, NO{sub 2}, and sulfate and nitrate aerosols onto a cornfield in North Carolina (35.7{degrees}N, 76.8{degrees}W) during its growing season. The average windspeed, standard deviation of the wind direction and the average air temperature were 2 ({+-}1) m s{sup -1}, 18{degrees} ({+-}28{degrees}), and 29 ({+-}6){degrees}C at 10 m AGL, respectively. The deposition velocity of ozone is in the range of 0 to 2.9 cm s{sup -1} with an average of 0.7 ({+-} 0.5) cm s{sup -1}. The deposition velocities of both sulfur dioxide and nitrogen dioxide are in the range of 0 to 0.3 cm s{sup -1} with an average of 0.15 ({+-}0.07) cm s{sup -1}. The average ozone and SO{sub 2} concentrations were 48 ppb and 8 ppb, respectively, suggesting that the ozone and sulfur dioxide depositions are 0.06 ({+-}0.06) and 0.003 ({+-}0.002) kg ha{sup -1} h{sup -1}, respectively. Mass flux density of nitrogen oxides is 2 g N ha{sup -1} h{sup -1}, and the mass flux density of nitrogen dioxide was estimated to lie between -2 and -6 g ha{sup -1}h{sup -1}, where minus indicates a downward flux. The ozone deposition velocities compare well with available data. 20 refs.

• OSTI ID: 617685
• Report Number(s): CONF-9605175--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR-BIOSPHERE INTERACTIONS
DEPOSITION
ECOLOGICAL CONCENTRATION
NITRATES
NITROGEN DIOXIDE
OZONE
SULFATES
SULFUR DIOXIDE
VELOCITY