Brief Summary of Minutes of Annual Meeting

All meeting minutes from our Spring Meeting (Business Meeting) and our Fall Meeting and Scientific Symposium (both Oct 2009, and now Oct 2010 minutes) can be found at our website(http://nadp.isws.illinois.edu/committees/minutes.aspx), and are available for viewing and download.

The NRSP-3 provides a framework for cooperation among State Agricultural Experiment Stations (SAES), the U.S. Department of Agriculture, and other governmental and nongovernmental organizations that support the National Atmospheric Deposition Program (NADP). The NADP provides quality-assured data and information on the exposure of managed and natural ecosystems and cultural resources to acidic compounds, nutrients, base cations, and mercury in precipitation and through dry deposition of these same compounds. NADP data support informed decisions on air quality issues related to precipitation chemistry. Specifically, researchers use NADP data to investigate the impacts of atmospheric deposition on the productivity of managed and natural ecosystems; the chemistry of estuarine, surface, and ground waters; and the biodiversity in forests, shrubs, grasslands, deserts, and alpine vegetation. These research activities address environmental stewardship, one of the Experiment Station Sections research challenges. Researchers also use NADP Mercury Deposition Network data to examine the role of atmospheric deposition in affecting the mercury content of fish, and to better understand the link between environmental and dietary mercury and human health. This fits with another research priority of relationship of food to human health. The NADP operates three precipitation chemistry networks: the National Trends Network (NTN), the Atmospheric Integrated Research Monitoring Network (AIRMoN), and the Mercury Deposition Network (MDN). At the end of September, 2010, 244 NTN stations were collecting one-week precipitation samples in 48 states, Puerto Rico, the Virgin Islands, and Quebec Province, Canada. The NTN provides the only long-term nationwide record of basic ion wet deposition in the United States. Complementing the NTN are the 7-site AIRMoN and the 116-site MDN. Data from daily precipitation samples collected at AIRMoN sites support continued research of atmospheric transport and removal of air pollutants and development of computer simulations of these processes. The MDN offers the only long-term and routine measurements of mercury in North American precipitation. These data are used to quantify mercury deposition to water bodies that have fish and wildlife consumption advisories due to this toxic chemical. In 2008, every state and 10 Canadian provinces listed advisories warning people to limit fish consumption due to high mercury levels. Coastal advisories are also in place for Atlantic waters from Maine to Rhode Island, from North Carolina to Florida, for the entire U.S. Gulf Coast, and for coastal Hawaii and Alaska. Short-term Outcomes and Outputs. Samples Collected. Our principal objective and accomplishment/outcome for this project is the collection and analysis of samples for precipitation chemistry. Briefly, the NADP processed a total of 13,075 weekly precipitation samples from the NTN. These include 12,694 samples and 381 quality assurance samples. The chemical analyses include observations of 10 different analyte concentrations and precipitation volume, which allow for calculation of deposition flux for each analyte. These same data are collected daily (i.e., every day with measurable precipitation) from the 7-site AIRMoN network. For the year, AIRMoN collected and processed 1,059 precipitation samples, including 146 quality assurance samples. The MDN collected and processed 7,199 weekly mercury-in-precipitation samples during the year, including approximately 300 quality assurance samples. NADP Data. Our second most important accomplishment or outcome is making data available to all for the support of continued research. Scientists, policymakers, educators, students, and others are encouraged to access data at no charge from the NADP website (http://nadp.isws.illinois.edu). This site offers online retrieval of individual data points, seasonal and annual averages, trend plots, concentration and deposition maps, reports, manuals, and other data and information about the program. As of today, 2009 calendar year data are complete and online, with data through June of 2010 available within weeks. Website usage statistics provide evidence that our data are being used. During FY2010, website usage continued to grow. There are now more than 39,000 registered users with over 356,000 independent user sessions. There were almost 27,000 data downloads from the site (specifically, 26,938). The site received more than 1.505 million webpage hits, and our data maps were viewed approximately 124,000 times. Information about users is collected, and the user types include about 33 percent from federal and state agencies, 33 percent from universities, 20 percent from K-to-12 schools, and 14 percent from other organizations. The NADP website has registered users from more than 150 countries over the globe. These statistics demonstrate that NADP continues to be relevant to both the scientific and educational communities, and to attract new users. Map Summary. During FY10, annual maps of atmospheric pollutants, concentrations, and depositions were developed for 2009 calendar year measurements. These maps are used widely for a number of reasons, and constitute one of the major products of the network. Individual maps are filed by network, year, and constituent (see examples at http://nadp.isws.illinois.edu/data/annualiso.aspx). Individual maps are compiled into annual Map Summary reports (http://nadp.isws.illinois.edu/lib/dataReports.aspx). We also completed the distribution of approximately 1,800 printed FY08 Map Summaries, and printed and began distributing 2000 of the 2009 Map Summaries in August. The Summary is available for all to download. Scientific Meeting (Fall 2009). At the end of each federal year, a scientific meeting is held that showcases some of the latest deposition research that occurred during the year. During FY2010 (Saratoga Springs, NY, Oct. 68), the meeting focused on Bridging Air and Ecosystems. The meeting attracted more than 175 registered participants (our largest ever), and provided more than 40 speakers (two keynotes) organized into 7 sessions, which included, Are Ecosystems Responding to Emission Reductions? and Agricultural Emissions and Ecosystem Effects. All presentations, posters, and meeting proceedings are available on the NADP website (http://nadp.isws.illinois.edu/meetings/fall2009/post/). Scientific Meeting (Fall 2010). The latest meeting, the Fall 2010 Meeting and Scientific Symposium, was held in October 2010 (after these report dates) in Truckee, CA. It was focused on Networking the Networks and was meant to foster collaboration between networks, produce more information with the same effort, and so forth. There were 152 participants, 2 keynote addresses, 35 speakers, and 31 poster presentations in 6 sessions focusing on networks monitoring in the environment. These sessions included Climate Change and Soil Networks. Committee minutes, proceedings, and scientific presentations are available on the website. Preparations are well underway for our next Fall Technical and Scientific Symposium in Providence, Rhode Island on October 25 to 28, 2011. All meeting information, registration, payment, and other details will be made available online soon. These basic activities fulfilled the project objectives: (1) coordination of three networks; (2) quality assurance to ensure consistency; and (3) analytical, site support, and data validation services for the sites supported directly through this agreement. Network Operation Notes. The NADP continues to convert our precipitation gages to an all-digital network, originating with a Technical Committee decision in 2006 (http://nadp.isws.illinois.edu/newissues/newgages/newequip.aspx). Currently, the network is well on its way to completing this goal. In mid- FY10, 50 percent of our sites (approximately 150 sites) were using and reporting digital precipitation data (15-minute observations). Updated versions of the following quality assurance documents were produced and approved at the Fall 2009 meeting: 1) Quality Management Plan; 2) Quality Assurance Plan; 3) Guidelines for NADP Laboratory Quality Assurance Reports; 4) Guidelines for NADP Laboratory Reviews; 5) Guidelines for NADP Quality Management System Review; 6) NADP Site Information Worksheet; 7) NADP Site Selection and Installation Manual; and 8) Guide for New NADP Initiatives. These documents were all in use during the year (http://nadp.sws.uiuc.edu/lib/qaPlans.aspx). Further, the U.S. Geological Survey conducted an external review of our laboratories, with 360 performance evaluation samples for the NTN, 216 performance evaluation samples for the MDN, 100 field audit samples to NTN site operators and 115 system blank samples to MDN site operators, and 20 blind Audit Program samples to MDN site operators. Other Notes. In November 2004, the U.S. Department of Agriculture (USDA) Animal and Plant Health Inspection Service issued the first report of Phakopsora pachyrhizi, commonly known as Asian Soybean Rust (ASR), in the continental U.S. ASR is an obligate fungal parasite that can cause significant losses in soybean and other leguminous crops. From infected plants, ASR spreads through the aerial release and dispersal of spores. These airborne spores can be scavenged in and below clouds and deposited by rain on uninfected host plants hundreds of kilometers from an existing infection. During the 2010 growing season, NADP again partnered with the USDA Cereal Disease Laboratory (CDL) to look for ASR spores in NTN samples (5th year). With partial support from the Agricultural Research Service, weekly samples from 80 eastern U.S. NTN sites were selected and are undergoing study. Additionally, a new wheat rust investigation, also with CDL, began in November 2009. This initiative will investigate 44 Southern U.S. sites and weekly precipitation samples for several strains of winter wheat rust. Results should be available for the FY11 report. The presence of ammonia gas in the atmosphere and its association with agricultural operations has become a very important topic of discussion, and NADP is continuing with an ammonia monitoring network across the central part of the U.S. and Canada. The goal is to develop, deploy, and operate a cost-efficient passive sampling network for basic ammonia gas concentrations. During FY2010, the networks 21 sites collected 2,051 observations of ammonia in the atmosphere, principally across the U.S. Midwest. These two-week integrated values will be used to quantify the spatial and temporal differences in atmospheric ammonia concentrations and estimate dry deposition of ammonia nitrogen. The network includes a quality assurance program to document the accuracy of passive samplers. Following NADP methods, the resulting quality-assured concentrations will be reported and made available for use by all data users. (At the FY10 Fall Meeting, this new network was added.) More information can be found at http://nadp.isws.illinois.edu/nh3net/. This network has numerous implications for agriculture, including directly addressing Challenge Area #2 in The Science Roadmap for Agriculture. The NADP, with support from USGS, worked on its ability to capture the analyte bromine in its NTN samples. Bromide is released into the environment via natural and anthropogenic processes, including agricultural fumigants and flame-retardants. Methyl bromide is classified as an ozone-depleting substance, and its use is strictly regulated and monitored by the U.S. EPA. Although there are regulations in place, there is still a concern about the amount of bromide present in the atmosphere. During FY11, regular collection and reporting of this analyte is planned. Scientists at the U.S. Environmental Protection Agency supported research at the NADPs Central Analytical Laboratory to determine whether organic nitrogen deposition can be measured reliably and accurately in weekly NTN samples. Preliminary results from these tests indicate a seasonal trend in organic nitrogen concentrations. Furthermore, these concentrations may account for as much as one-third of total nitrogen deposition. This added information contributes to the understanding of our current inorganic nitro¬gen measurements and deposition patterns. Results are forthcoming in the FY11 year. The NRSP-3 has enhanced our website to better serve our members and data users. During the 2010 calendar year, 145 journal articles and reports were generated using the NADP data in some form. These are listed in the Publications section. This is again evidence that NADP is producing data that are both valuable and useful. Milestones 1. To date, nearly 400,000 observations of precipitation chemistry are archived by the NADP (NTN and AIRMoN). More importantly, all of these remain available in our database, and are comparable over the years for research. 2. At the NADP Fall 2009 Meeting and Scientific Symposium, the technical sub-committees voted to approve the Atmospheric Mercury Network (AMNet) as an official NADP network. This is the fourth network of the NADP in our 32-year history. This network has operated as an NADP special study since 2008. The focus of AMNet is the measurement of atmospheric mercury concentrations across North America. These data will be used to model dry deposition of mercury to the environment. Currently, AMNet has 21 sites. On-site analyzers measure atmospheric mercury concentrations on a continuous (15 minute) basis. More information about AMNet can be found at http://nadp.isws.illinois.edu/amn/. During this next federal year, quality-assured data will be moved to the web to support future research.

Approximately 141 publications used NADP data or resulted from NRSP-3 activities in 2010 (January to December 15). A publically available online database that lists citations using NADP data is accessible at: http://nadp.isws.illinois.edu/lib/bibsearch.asp. 1. Adams, Mary Beth, Loughry, L., Plaugher, L. (cpl.), 2010. Experimental forests and ranges of the USDA Forest Service. USDA Forest Service Publication, http://hdl.handle.net/1957/17290. 2. Allen, Daniel, J., Brent, G.F., 2010. Sequestering CO2 by Mineral Carbonation: Stability against Acid Rain Exposure. Environmental Science & Technology 44 (7): 2735-2739. 3. Ashton, Isabel W., Miller, A.E., Bowman, W.D., Suding, K.N., 2010. Niche complementarity due to plasticity in resource use: plant partitioning of chemical N forms. Ecology 91: 32523260, doi:10.1890/09-1849.1. 4. Bash, Jesse O., 2010. Description and initial simulation of a dynamic bidirectional airsurface exchange model for mercury in Community Multiscale Air Quality (CMAQ) model. Journal of Geophysical Research 115: D06305, doi:10.1029/2009JD012834. 5. Batson, Jacqulyn Ann, 2010. Denitrification and a Nitrogen Budget of Created Riparian Wetlands. Masters Thesis in partial fulfillment for the Degree Master of Science, Ohio State University. 6. Beavers, B.W., Liu, Z., Cox, M.S., Kingery, W.L., Brink, G.E., Gerard, P.D., McGregor, K.C., 2010. Phosphorus Dynamics in Two Poultry-Litter Amended Soils of Mississippi Under Three Management Systems. Pedosphere 20(2): 217228. 7. Beem, Katherine B., Raja, S., Schwandner, F.M., Taylor, C., Lee, T., Sullivan, A.P., Carrico, C.M., McMeeking, G.R., Day, D., Levin, E., Hand, J., Kreidenweis, S.M., Schichtel, B., Malm, W.C., Collett, J.L. Jr., 2010. Deposition of reactive nitrogen during the Rocky Mountain Airborne Nitrogen and Sulfur (RoMANS) study. Environmental Pollution 158(3): 862-872, doi: 10.1016/j.envpol.2009.09.023. 8. Beltran, Bray J., Amatya, D.M., Youssef, M., Jones, M., Callahan, T.J., Skaggs, R.W., Nettles, J.E., 2010. Impacts of Fertilization on Water Quality of a Drained Pine Plantation: A Worst Case Scenario. Journal of Environmental Quality 39: 293303. 9. Bohl Bormann, Nancy, L, Baxter, C.A., Adraski, T.W., Good, L.W., Bundy, L.G., 2010. Source Water Effects on Runoff Amount and Phosphorus Concentration under Simulated Rainfall. Soil Science Society of America Journal 74: 612618. 10. Burkle, Laura A., Irwin, R.E., 2010. Beyond biomass: measuring the effects of community-level nitrogen enrichment on floral traits, pollinator visitation and plant reproduction. Journal of Ecology 98: 705717, doi: 10.1111/j.1365-2745.2010.01648.x 11. Caffrey, J.M., Landing, W.M., Nolek, S.D., Gosnell, K., Bagui, S.S., Badui, S.C., 2010. Atmospheric deposition of mercury and major ions to the Pensacola Bay (Florida) watershed: spatial, seasonal, and inter-annual variability. Atmospheric Chemistry and Physics Discussion 10: 45934616, www.atmos-chem-phys-discuss.net/10/4593/2010/. 12. Cai, Meijun, Schwartz, J., Robinson, R., Moore, S., Kulp, M., 2010. Long-Term Effects of Acidic Deposition on Water Quality in a High-Elevation Great Smoky Mountains National Park Watershed: Use of an Ion InputOutput Budget. Water, Air & Soil Pollution 209(1): 143-156, doi: 10.1007/s11270-009-0187-5. 13. Chang, Ya-Mei, Hsu, N.-J., Huange, H.-C., 2010. Journal of Computational and Graphical Statistics 19(1): 117-139, doi:10.1198/jcgs.2010.07157. 14. Civerolo, K., Hogrefe, C., Zalewsky, E., Hao, W., Sistla, G., Lynn, B., Rosenzweig, C., Kinney, P.L., 2010. Evaluation of an 18-year CMAQ simulation: Seasonal variations and long-term temporal changes in sulfate and nitrate. Atmospheric Environment 44(31): 3745-3752, doi: 10.1016/j.atmosenv.2010.06.056. 15. Clow, David W., Mast, M.A., 2010. Mechanisms for chemostatic behavior in catchments: Implications for CO2 consumption by mineral weathering. Chemical Geology 269: 4051. 16. Clow, David W., Nanus, L., Huggett, B., Use of regression-based models to map sensitivity of aquatic resources to atmospheric deposition in Yosemite National Park, USA. Water Resources Research 46: W09529, doi:10.1029/2009WR008316. 17. Coconino County, 2010. Lake Mary Regional TMDL For Mercury in Fish Tissue: Upper Lake Mary, Lower Lake Mary, Soldiers Lake, Soldiers Annex Lake, and Lower Long Lake Little Colorado River Watershed., State of Arizona, Department of Environmental Quality, Open File Report #OFR 10-02 http://www.azdeq.gov/environ/water/assessment/download/Lake_Mary_Region_Draft-6-16-2010.pdf. 18. Converse, A.D., Riscassi, A.L., Scanlon, T.M., 2010. Seasonal variability in gaseous mercury fluxes measured in a high-elevation meadow. Atmospheric Environment 44(18): 2176-2185, doi 10.1016/j.atmosenv.2010.03.024. 19. Corvo, F., Reyes, J., Valdes, C., Villasenor, F., Cuesta, O., Aguilar, D., Quintana, P., 2010. Influence of Air Pollution and Humidity on Limestone Materials Degradation in Historical Buildings Located in Cities Under Tropical Coastal Climates. Water, Air & Soil Pollution 205: 359375, doi 10.1007/s11270-009-0081-1. 20. Croft, B., Lohmann, U., Martin, R.V., Stier, P., Wurzler, S., Feichter, J., Hoose, C., Heikkil, U., van Donkelaar, A., Ferrachat, S., 2010. Influences of in-cloud aerosol scavenging parameterizations on aerosol concentrations and wet deposition in ECHAM5-HAM. Atmospheric Chemistry and Physics 10: 15111543. 21. Cusack, D.F., Torn, M.S., McDowell, W.H., Silver, W.L., 2010. The response of heterotrophic activity and carbon cycling to nitrogen additions and warming in two tropical soils. Global Change Biology 16: 25552572, doi: 10.1111/j.1365-2486.2009.02131.x. 22. Daley, Michelle, Potter, J., Difranco, E., McDowell, W.H., 2010. Nitrogen Assessment for the Lamprey River Watershed, New Hampshire Water Resources Research Center (NH WRRC), Department of Natural Resources, The State of New Hampshire, http://des.nh.gov/organization/divisions/water/wmb/coastal/documents/unh_nitrogenassessment.pdf. 23. David, Mark B., Drinkwater, L.E., McIsaac, G.F., 2010. Sources of Nitrate Yields in the Mississippi River Basin. Journal of Environmental Quality 39: 16571667, doi:10.2134/jeq2010.0115. 24. Dayyania, Shadi, Prasherb, S.O., Madanic, A., Madramootoob, C.A., Development of DRAINWARMF model to simulate flow and nitrogen transport in a tile-drained agricultural watershed in Eastern Canada. Agricultural Water Management 98: 5568. 25. Dennis, Robin, L., Mathur, R., Pleim, J.E., Walker, J.T., 2010. Fate of ammonia emissions at the local to regional scale as simulated by the Community Multiscale Air Quality model. Atmospheric Pollution Research 1: 207214. 26. Di Vittorio, Alan, V., Anderson, R.S., White, J.D., Miller, N.L., Running, S.W., 2010. Development and optimization of an Agro-BGC ecosystem model for C4 perennial grasses. Ecological Modeling 221(17): 2038-2053, doi:10.1016/j.ecolmodel.2010.05.013. 27. Drevnick, P.E., Shinneman, A.L.C., Lamborg, C.H., Engstrom, D.R., Bothner, M.H., Oris, J.T., 2010. Mercury Flux to Sediments of Lake Tahoe, CaliforniaNevada. Water, Air, and Soil Pollution 210(1-4): 399-407, doi 10.1007/s11270-009-0262-y. 28. Engle, M. A., Tate, M. T., Krabbenhoft, D. P., Schauer, J. J., Kolker, A., Shanley, J. B., and Bothner, M. H., 2010. Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America. Journal of Geophysical Research 115: D18306, doi: 10.1029/2010JD014064. 29. Ewing, H.A., Groffman, P.M., Frank, D.A., 2010. Grazers and soil moisture determine the fate of added 15NH4+ in Yellowstone grasslands. Plant Soil 328: 337351, doi: 10.1007/s11104-009-0113-z. 30. Fang, Y., Fiore, A.M., Horowitz, L.W., Levy, H., Hu, Y., Russell, A.G., 2010. Sensitivity of the NOy budget over the United States to anthropogenic and lightning NOx in summer. Journal of Geophysical Research 115: D18312, doi:10.1029/2010JD014079. 31. Fenn, Mark. E., Allen, E.B., Weiss, S.B., Jovan, S., Geiser, L.H., Tonnesen, G.S., Johnson, R.F., Rao, L.E., Gimeno, B.S., Yuan, F., Meixner, T., Bytnerowicz, A., 2010. Nitrogen critical loads and management alternatives for N-impacted ecosystems in California. Journal of Environmental Management 91: 2404-2423. 32. Filippa, Gianluca, Freppaz, M., Williams, M.W., Zanini, E., 2010. Major element chemistry in inner alpine snowpacks (Aosta Valley Region, NW Italy). Cold Regions Science and Technology 64 (2): 158.166, doi:10.1016/j.coldregions.2010.07.005. 33. Florida, State of, 2010. Site-Specific Information in Support of Establishing Numeric Nutrient Criteria for Choctawhatchee Bay, Florida Department of Environmental Protection, Tallahassee, FL 32399. 34. Florida, State of, 2010. Site-Specific Information in Support of Establishing Numeric Nutrient Criteria in Ochlockonee Bay. Division of Environmental Assessment and Restoration, Florida Department of Environmental Protection, Tallahassee, FL 32399. 35. Florida, State of, 2010. Site-Specific Information in Support of Establishing Numeric Nutrient Criteria for the Springs Coast, Florida. Department of Environmental Protection, Tallahassee, FL 32399, http://www.dep.state.fl.us/water/wqssp/nutrients/docs/estuarine/pinellaspark/springs_coast_082010.pdf. 36. Florida, State of, 2010. Site-Specific Information in Support of Establishing Numeric Nutrient Criteria for St. Joseph Bay. Division of Environmental Assessment and Restoration, Florida Department of Environmental Protection, Tallahassee, FL 32399. http://www.dep.state.fl.us/water/wqssp/nutrients/docs/estuarine/tallahassee/st_joe_bay_081310.pdf. 37. Follstad Shaw, J.J., Harner, M.J., Tibbets, T.M., 2010. Elaeagnus angustifolia Elevates Soil Inorganic Nitrogen Pools in Riparian Ecosystems. Ecosystems 13: 4661, doi: 10.1007/s10021-009-9299-4. 38. Fu, X., Feng, X., Zhu, W., Rothenberg, S., Yao, H., Zhang, H., 2010. Elevated atmospheric deposition and dynamics of mercury in a remote upland forest of southwestern China. Environmental Pollution 158(6): 2324-2333, doi: 10.1016/j.envpol.2010.01.032. 39. Gaddis, Erica, Voinov, A., 2010. Spatially Explicit Modeling of Land Use Specific Phosphorus Transport Pathways to Improve TMDL Load Estimates and Implementation Planning. Water Resources Management 24: 1621-1644, doi: 10.1007/s11269-009-9517-z. 40. Gahl, M.K., Calhoun, A.J.K., 2010. The role of multiple stressors in ranavirus-caused amphibian mortalities in Acadia National Park wetlands. Canadian Journal of Zoology, 88: 108-121. 41. Garvey, James, Ickes, B., Zigler, S., 2010. Challenges in merging fisheries research and management: the Upper Mississippi River experience. Hydrobiologia 640: 125144, doi: 10.1007/s10750-009-0061-x. 42. Geiser, Linda H., Jovan, S.E., Glavich, D.A., Porter, M.K., 2010. Lichen-based critical loads for atmospheric nitrogen deposition in Western Oregon and Washington Forests, USA. Environmental Pollution 158(7): 2412-2421, doi: 10.1016/j.envpol.2010.04.001. 43. Gil, Inigo San, White, M., Melendez, E., Vanderbilt, K., 2010. Case Studies of Ecological Integrative Information Systems: The Luquillo and Sevilleta Information Management Systems. Communications in Computer and Information Science 108: 18-35, doi: 10.1007/978-3-642-16552-8_3. 44. Gilbert, Douglas, Wieckowicz, R., Kang, W.-J., Wilcox, E.G., Ralys, B., 2010. TMDLs for Munson Slough WBID 807D (Dissolved Oxygen), Lake Munson WBID 807C [Dissolved Oxygen, Nutrients (Trophic State Index), and Turbidity] and Munson Slough Below Lake Munson WBID 807 (Dissolved Oxygen and Un-ionized ammonia). Florida Department of Environmental Protection, 136 pages. 45. Godsey, Sarah E., Aas, W., Clair, T.A., deWit, H.A., Fernandez, I.J., Kahl, J.S., Malcolm, I.A., Neal, C., Neal, M., Nelson, S.J., Norton, S.A., Palucias, M.C., Skjelkvale, B.L., Soulsby, C., Tetzlaff, D., Kirchner, J.W., 2010. Generality of fractal 1/f scaling in catchment tracer time series, and its implications for catchment travel time distributions. Hydrologic Processes 24: 16601671. 46. Goel, Anubha., McConnell, L.L., Torrents, A., Kuang, Z., Hapeman, C.J., Merritt, D.W., Alexander, S.T., Scudlark, J.R., and Scarborough, R., 2010. Environmental Factors Affecting the Levels of Legacy Pesticides in the Airshed of Delaware and Chesapeake Bays, USA. Environmental Toxicology and Chemistry, 29: 18931906, doi: 10.1002/etc.243. 47. Goodman, Keli J., 2010. The Effect of In-Line Lakes on Dissolved Organic Matter Dynamics in Mountain Streams. All GraduateTheses and Dissertations. Paper 702, http://digitalcommons.usu.edu/etd/702. 48. Goodman, Keli, J., Baker, M.A., Wurtsbaugh, W.A., 2010. Mountain lakes increase organic matter decomposition rates in streams. Journal of the North American Benthological Society 29(2): 521-529, doi: 10.1899/09-070.1 49. Gratz, Lynne E., 2010. Identification of Atmospheric Mercury Sources and Transport Pathways on Local and Regional Scales. A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, University of Michigan. 50. Greenquist, M.A., Schwarz, A.K., Klopfenstein, T.J., Schacht, W.H., Erickson, G.E., Vander Pol, K.J., Luebbe, M.K., Brink, K.R., Baleseng, L.B., 2010. Effects of nitrogen fertilization and dried distillers grains supplementation: Nitrogen use efficiency. Journal of Animal Science, online publication, doi:10.2527/jas.2010-2902. 51. Grenon, Jill; Svalberg, T. Porwoll, T., Story, M., 2010. Lake and bulk sampling chemistry, NADP, and IMPROVE air quality data analysis on the Bridger-Teton National Forest (USFS Region 4). Gen. Tech. Rep. RMRS-GTR-248WWW. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 44 p. 52. Gustin, Mae, Jaffe, D., 2010. Reducing the Uncertainty in Measurement and Understanding of Mercury in the Atmosphere. Environmental Science & Technology 44(7): 2222-2227. 53. Hill, Brian, H., Elonen, C.M., Jicha, T.M., Bolgrien, D.W., Moffett, M.F., 2010. Sediment microbial enzyme activity as an indicator of nutrient limitation in the great rivers of the Upper Mississippi River basin. Biogeochemistry 97(2-3): 195-209, doi: 10.1007/s10533-009-9366-0. 54. Hill, J. Jaron, Chumchal, M.M., Drenner, R.W., Pinder, J.E., Drenner, S.M., 2010. Use of preserved museum fish to evaluate historical and current mercury contamination in fish from two rivers in Oklahoma, USA. Environmental Monitoring and Assessment 161(1-4): 509-516, doi: 10.1007/s10661-009-0764-5. 55. Hirmas, Daniel R., Amrhein, C., Graham, R.C., 2010. Spatial and process-based modeling of soil inorganic carbon storage in an arid piedmont. Geoderma 154: 486494, doi: 10.1016/j.geoderma.2009.05.005. 56. Huijnen, V., Williams, J.E., van Weele, M., van Noije, T.P.C., Krol, M.C., Dentener, F., Segers, A., Houweling, S., Peters, W., de Laat, A.T.J., Boersma, K.F., Bergamaschi, P., van Velthoven, P.F.J., Le Sager, P., Eskes, H.J., Alkemade, F., Scheele, M.P., Nedelec, P., Patz, H.-W., 2010. The global chemistry transport model TM5: description and evaluation of the tropospheric chemistry version 3.0. 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