Calculated back trajectory coordinates for air masses contributing to five selected precipitation-mercury deposition episodes at a National Atmospheric Deposition Program monitoring site in southeastern Indiana during 2009 to 2015
Dates
Publication Date
2018-05-17
Time Period
2009-07-29
Time Period
2015-06-25
Citation
Kenski, D.M., and Risch, M.R., 2018, Calculated back trajectory coordinates for air masses contributing to five selected precipitation-mercury deposition episodes at a National Atmospheric Deposition Program monitoring site in southeastern Indiana during 2009 to 2015: U.S. Geological Survey data release, https://doi.org/10.5066/F7RV0MXM.
Summary
This data release contains tabular digital data describing calculated hourly back trajectory position coordinates for air masses contributing to five selected precipitation-mercury deposition episodes at National Atmospheric Deposition Program monitoring site IN21 (National Atmospheric Deposition Program, 2017) in southeastern Indiana during 2009‒2015. The air pollution transport and dispersion modeling system HYSPLIT (Stein et. al, 2015) was used to calculate the back trajectory position coordinates during 48 hours preceding the start of each episode. The 40-km gridded input data to HYSPLIT were from National Oceanic and Atmospheric Administration (2017). Continuous, digital precipitation depth data were recorded at the IN21 monitoring [...]
Summary
This data release contains tabular digital data describing calculated hourly back trajectory position coordinates for air masses contributing to five selected precipitation-mercury deposition episodes at National Atmospheric Deposition Program monitoring site IN21 (National Atmospheric Deposition Program, 2017) in southeastern Indiana during 2009‒2015. The air pollution transport and dispersion modeling system HYSPLIT (Stein et. al, 2015) was used to calculate the back trajectory position coordinates during 48 hours preceding the start of each episode. The 40-km gridded input data to HYSPLIT were from National Oceanic and Atmospheric Administration (2017). Continuous, digital precipitation depth data were recorded at the IN21 monitoring site. Each episode was defined as containing hourly precipitation depth totals > 2.54 mm (0.10 inch) and a precipitation-mercury deposition amount between 1,640 and 2,158 nanograms per square meter per week. Back trajectories were plotted from starting heights of 100 m, 300 m, and 500 m above ground level. These trajectories were not constrained and the actual height of the air mass as it traveled could vary from ground level to the boundary layer at 1,000 m to 2,000 m. References cited: National Atmospheric Deposition Program, 2017. Mercury Deposition Network. Accessed 2017 at http://nadp.sws.uiuc.edu/mdn/ National Oceanic and Atmospheric Administration, 2017. Eta Data Assimilation System (EDAS40) Archive Information. Accessed 2017 at https://www.ready.noaa.gov/edas40.php and ftp://arlftp.arlhq.noaa.gov/pub/archives/edas40/ Stein, A.F., Draxler, R.R, Rolph, G.D., Stunder, B.J.B., Cohen, M.D., and Ngan, F., 2015. NOAA's HYSPLIT atmospheric transport and dispersion modeling system, Bull. Amer. Meteor. Soc. 96, 2059-2077. http://dx.doi.org/10.1175/BAMS-D-14-00110.1
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Kenski Risch Back Trajectory Indiana metadata v2.xml Original FGDC Metadata
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Purpose
The purpose of this data release is to document the model output data of the 48-hour back trajectories of the paths of air masses at three starting heights that contributed to five episodes of precipitation-mercury deposition at the National Atmospheric Deposition Program monitoring site IN21 in southeastern Indiana. Although the data in this data release were not collected by the USGS or funded by the USGS, they were contributed by a USGS cooperator, the Lake Michigan Air Directors Consortium, for a collaborative study of atmospheric mercury deposition in the Midwestern USA. A publication describing the results of a study of atmospheric mercury deposition discusses the back trajectory coordinates from this data release, "Spatial patterns and temporal changes in atmospheric-mercury deposition for the Midwestern USA, 2001-2016" by Martin R. Risch and Donna M. Kenski, Atmosphere 2018, 9, 29; doi:10.3390/atmos9010029
