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Byrnes, Danyka K; Van Meter, Kimberly J; Basu, Nandita B (2020): Trajectories Nutrient Dataset for Nitrogen (TREND-nitrogen). PANGAEA, https://doi.org/10.1594/PANGAEA.917583

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Abstract:
In the present work, we have synthesized agricultural, population, and atmospheric deposition data across the contiguous U.S. for the period 1930-2017 to develop the Trajectories Nutrient Dataset for Nitrogen (TREND-nitrogen). The data is provided at U.S. county scale at an annual time step, and the following components of the N mass balance are included: atmospheric N deposition, N fertilizer, biological N fixation, manure N, crop N uptake, human N waste, and the overall N surplus. The dataset was constructed using information from a variety of sources, including the U.S. Census of Agriculture, the National Atmospheric Deposition Program, the United States Geological Survey, and the U.S. Census Bureau. Gap-filling and data-fusion techniques were utilized to provide annual-scale coverage and to harmonize data obtained from disparate sources over different time periods and varying spatial scales. The dataset will facilitate investigations of spatial and temporal changes in anthropogenic N dynamics at multiple scales across the U.S. in the context of historical changes in population, land use, and management.
Keyword(s):
Agriculture; atmospheric deposition; biological nitrogen fixation; fertilizer; human; legacy N; manure; nitrogen; nitrogen surplus
Supplement to:
Byrnes, Danyka K; Van Meter, Kimberly J; Basu, Nandita B (2020): Long‐term shifts in U.S. nitrogen sources and sinks revealed by the new TREND‐nitrogen dataset (1930‐2017). Global Biogeochemical Cycles, https://doi.org/10.1029/2020GB006626
Coverage:
Median Latitude: 37.000000 * Median Longitude: -103.500000 * South-bound Latitude: 25.000000 * West-bound Longitude: -126.000000 * North-bound Latitude: 49.000000 * East-bound Longitude: -81.000000
Date/Time Start: 1850-01-01T00:00:00 * Date/Time End: 2015-12-31T00:00:00
Event(s):
US_America * Latitude Start: 49.000000 * Longitude Start: -126.000000 * Latitude End: 25.000000 * Longitude End: -81.000000 * Date/Time Start: 1850-01-01T00:00:00 * Date/Time End: 2015-12-31T00:00:00
Size:
90.7 MBytes

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