title: Gaseous oxidized mercury dry deposition measurements in the southwestern USA: a comparison between Texas, eastern Oklahoma, and the Four Corners area.
abstract: Gaseous oxidized mercury (GOM) dry deposition measurements using aerodynamic surrogate surface passive samplers were collected in central and eastern Texas and eastern Oklahoma, from September 2011 to September 2012. The purpose of this study was to provide an initial characterization of the magnitude and spatial extent of ambient GOM dry deposition in central and eastern Texas for a 12-month period which contained statistically average annual results for precipitation totals, temperature, and wind speed. The research objective was to investigate GOM dry deposition in areas of Texas impacted by emissions from coal-fired utility boilers and compare it with GOM dry deposition measurements previously observed in eastern Oklahoma and the Four Corners area. Annual GOM dry deposition rate estimates were relatively low in Texas, ranging from 0.1 to 0.3 ng/m(2)h at the four Texas monitoring sites, similar to the 0.2 ng/m(2)h annual GOM dry deposition rate estimate recorded at the eastern Oklahoma monitoring site. The Texas and eastern Oklahoma annual GOM dry deposition rate estimates were at least four times lower than the highest annual GOM dry deposition rate estimate previously measured in the more arid bordering western states of New Mexico and Colorado in the Four Corners area.
authors: Air Quality Analysis Section, US Environmental Protection Agency (EPA) Region 6, 1445 Ross Avenue, Dallas, TX 75202, USA.
authors: Mark E
authors: ME
authors: Sather
authors: National Exposure Research Laboratory, US EPA (E205-03), Research Triangle Park, NC 27711, USA.
authors: Shaibal
authors: 0000-0003-1343-2526
authors: S
authors: Mukerjee
authors: Air Quality Analysis Section, US Environmental Protection Agency (EPA) Region 6, 1445 Ross Avenue, Dallas, TX 75202, USA.
authors: Kara L
authors: KL
authors: Allen
authors: Alion Science and Technology, Inc., P.O. Box 12313, Research Triangle Park, NC 27709, USA.
authors: Luther
authors: L
authors: Smith
authors: Houston Laboratory, US EPA Region 6, 10625 Fallstone Road, Houston, TX 77099, USA.
authors: Johnson
authors: J
authors: Mathew
authors: Houston Laboratory, US EPA Region 6, 10625 Fallstone Road, Houston, TX 77099, USA.
authors: Clarence
authors: C
authors: Jackson
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: Ryan
authors: R
authors: Callison
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: Larry
authors: L
authors: Scrapper
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: April
authors: A
authors: Hathcoat
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: Jacque
authors: J
authors: Adam
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: Danielle
authors: D
authors: Keese
authors: Cherokee Nation Environmental Programs, 208 E. Allen Road, Tahlequah, OK 74464, USA.
authors: Philip
authors: 0000-0002-0603-9593
authors: P
authors: Ketcher
authors: Eurofins Frontier Global Sciences, 11720 North Creek Parkway North, Suite 400, Bothell, WA 98011, USA.
authors: Robert
authors: R
authors: Brunette
authors: Eurofins Frontier Global Sciences, 11720 North Creek Parkway North, Suite 400, Bothell, WA 98011, USA.
authors: Jason
authors: J
authors: Karlstrom
authors: Eurofins Frontier Global Sciences, 11720 North Creek Parkway North, Suite 400, Bothell, WA 98011, USA.
authors: Gerard
authors: G
authors: Van der Jagt
mesh_terms: D004784:Environmental Monitoring; D008628:Mercury / Q000737:chemistry*; D009825:Oklahoma; D013781:Texas
chemical_list: D008628:Mercury