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Particulate Matter Contributions from Agricultural Tilling Operations in an Irrigated Desert Region.

Qi M, Lin K, Li X, Sammis TW, Miller DR, Wang J - PLoS ONE (2015)

Bottom Line: Hourly data from three air quality monitoring stations positioned at a 2-m height located on the west and east mesas of New Mexico's Mesilla Valley and in the valley at Anthony, NM were acquired from the New Mexico Air Quality Bureau.The study spanned the agricultural tilling season, March 1 to April 30, for the years 2008 to 2012.One- second spatial PM10 concentrations at 200 m above the valley floor were measured during a two-hour controlled field tilling operation on April 1, 2008.

View Article: PubMed Central - PubMed

Affiliation: School of Science, Wuhan University of Technology, Wuhan, Hubei, P. R. China.

ABSTRACT
Sources of regional particulate matter (PM), particularly agricultural operations, must be understood in order to manage the air quality in irrigated dry climates. Direct monitoring measurements alone are useful, but not sufficient, to estimate regional PM source concentrations. This paper combines modeling with ground (point) and airplane (spatial) measurement methods to estimate regional PM10 (PM diameter≤10 μm) contributions from agricultural operations. Hourly data from three air quality monitoring stations positioned at a 2-m height located on the west and east mesas of New Mexico's Mesilla Valley and in the valley at Anthony, NM were acquired from the New Mexico Air Quality Bureau. The study spanned the agricultural tilling season, March 1 to April 30, for the years 2008 to 2012. One- second spatial PM10 concentrations at 200 m above the valley floor were measured during a two-hour controlled field tilling operation on April 1, 2008. The HYSPLIT 4.0 (Hybrid Single-Particle Lagrangian Integrated Trajectory version 4) model was run at the corresponding times and heights, outputting PM10 concentrations from all potential agricultural tilling operations. The calculated percentage contribution (modeled PM10 concentration/measured PM10 concentration) indicated that the near-surface (2-m height) proportion from the agricultural operations for five seasonal averages ranged from 0.7% to 1.5% on the west and east mesas and 1.3% for the valley site at Anthony. There were 71 hourly high values of contribution ratios ranging from 30 to 100% at the three sites, depending on the wind speed and direction.

No MeSH data available.


Related in: MedlinePlus

Superimposed PM10 plume at 13:00 MDT on April 1, 2008 from all potential tilling sources in the Mesilla Valley of southern New Mexico at a 2-m height (MDT: Mountain Daylight Time).
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pone.0138577.g004: Superimposed PM10 plume at 13:00 MDT on April 1, 2008 from all potential tilling sources in the Mesilla Valley of southern New Mexico at a 2-m height (MDT: Mountain Daylight Time).

Mentions: Fig 3 shows a sample figure of the simulated 2-m height dust concentration from a single source, and Fig 4 shows the concentrations with a superimposition of all potential sources. The gridded superimposed data closest to the air quality stations were compared with the corresponding measured PM10 data (superimposed data divided by the measured data) to calculate the percentage of contributions from agricultural operations for each hour for all three 2-m air quality sampler locations. As can be observed in Fig 3, a plume originates from a single source, and the location of the plume is determined by wind direction and intensity. When all sources of agricultural dust are combined (Figs 3–6), the concentration is higher in the valley as one moves from the edge of the valley to the center where more farming operations contribute to the dust concentration.


Particulate Matter Contributions from Agricultural Tilling Operations in an Irrigated Desert Region.

Qi M, Lin K, Li X, Sammis TW, Miller DR, Wang J - PLoS ONE (2015)

Superimposed PM10 plume at 13:00 MDT on April 1, 2008 from all potential tilling sources in the Mesilla Valley of southern New Mexico at a 2-m height (MDT: Mountain Daylight Time).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4589322&req=5

pone.0138577.g004: Superimposed PM10 plume at 13:00 MDT on April 1, 2008 from all potential tilling sources in the Mesilla Valley of southern New Mexico at a 2-m height (MDT: Mountain Daylight Time).
Mentions: Fig 3 shows a sample figure of the simulated 2-m height dust concentration from a single source, and Fig 4 shows the concentrations with a superimposition of all potential sources. The gridded superimposed data closest to the air quality stations were compared with the corresponding measured PM10 data (superimposed data divided by the measured data) to calculate the percentage of contributions from agricultural operations for each hour for all three 2-m air quality sampler locations. As can be observed in Fig 3, a plume originates from a single source, and the location of the plume is determined by wind direction and intensity. When all sources of agricultural dust are combined (Figs 3–6), the concentration is higher in the valley as one moves from the edge of the valley to the center where more farming operations contribute to the dust concentration.

Bottom Line: Hourly data from three air quality monitoring stations positioned at a 2-m height located on the west and east mesas of New Mexico's Mesilla Valley and in the valley at Anthony, NM were acquired from the New Mexico Air Quality Bureau.The study spanned the agricultural tilling season, March 1 to April 30, for the years 2008 to 2012.One- second spatial PM10 concentrations at 200 m above the valley floor were measured during a two-hour controlled field tilling operation on April 1, 2008.

View Article: PubMed Central - PubMed

Affiliation: School of Science, Wuhan University of Technology, Wuhan, Hubei, P. R. China.

ABSTRACT
Sources of regional particulate matter (PM), particularly agricultural operations, must be understood in order to manage the air quality in irrigated dry climates. Direct monitoring measurements alone are useful, but not sufficient, to estimate regional PM source concentrations. This paper combines modeling with ground (point) and airplane (spatial) measurement methods to estimate regional PM10 (PM diameter≤10 μm) contributions from agricultural operations. Hourly data from three air quality monitoring stations positioned at a 2-m height located on the west and east mesas of New Mexico's Mesilla Valley and in the valley at Anthony, NM were acquired from the New Mexico Air Quality Bureau. The study spanned the agricultural tilling season, March 1 to April 30, for the years 2008 to 2012. One- second spatial PM10 concentrations at 200 m above the valley floor were measured during a two-hour controlled field tilling operation on April 1, 2008. The HYSPLIT 4.0 (Hybrid Single-Particle Lagrangian Integrated Trajectory version 4) model was run at the corresponding times and heights, outputting PM10 concentrations from all potential agricultural tilling operations. The calculated percentage contribution (modeled PM10 concentration/measured PM10 concentration) indicated that the near-surface (2-m height) proportion from the agricultural operations for five seasonal averages ranged from 0.7% to 1.5% on the west and east mesas and 1.3% for the valley site at Anthony. There were 71 hourly high values of contribution ratios ranging from 30 to 100% at the three sites, depending on the wind speed and direction.

No MeSH data available.


Related in: MedlinePlus