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The Nitrogen Deposition metric is one component of the Air Pollution Indicator. It attempts to quantify the potential impacts of atmospheric nitrogen deposition on various ecosystem components. The multidimensional dataset contains layers representing 3-year average nitrogen values in kg/ha/yr that were used in the TCA Assessments from 2020-2024.
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| summary:
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The Nitrogen Deposition metric is one component of the Air Pollution Indicator. It attempts to quantify the potential impacts of atmospheric nitrogen deposition on various ecosystem components. The multidimensional dataset contains layers representing 3-year average nitrogen values in kg/ha/yr that were used in the TCA Assessments from 2020-2024.
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| accessInformation:
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(TDep) modeling system (https://nadp.slh.wisc.edu/committees/tdep/); (Tdep Program, https://nadp.slh.wisc.edu/committees/tdep/); Schwede, D.B. and G.G. Lear, 2014. A novel hybrid approach for estimating total deposition in the United States. Atmospheric Environment, 92, 207-220.
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thumbnail/thumbnail.png
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5000
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| typeKeywords:
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["ArcGIS Server","Data","Image Service","Service"]
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| description:
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<div style='text-align:Left;'><div><div><p style='font-weight:bold;margin:0 0 11 0;'><a href='https://data.fs.usda.gov/geodata/rastergateway/TCA/TCA_Nitrogen_Deposition.zip' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Direct Download (Raster Data Gateway)</span></span></a><span style='text-decoration:underline;'><span> </span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Objective:</span></span><span><span> Evaluate the impact of atmospheric nitrogen deposition on various ecosystem components including lichens, tree species (both growth and mortality), mycorrhizal communities, herbaceous plant species (changes in species richness), and leaching.</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data:</span></span><span><span> Deposition data is the 3-year average output from the Total Deposition (TDep) modeling system (https://nadp.slh.wisc.edu/committees/tdep/). TDep uses measurement-model fusion to bias correct modelled estimates (Tdep Program, https://nadp.slh.wisc.edu/committees/tdep/). TDep uses observations of air concentrations from the Clean Air Status and Trends Network (CASTNET) for measurements of dry deposition and observations of precipitation and precipitation chemistry from various National Atmospheric Deposition Program (NADP) networks. These observations are interpolated and used to create seasonal bias surfaces for results generated from CMAQ. Bias-adjusted CMAQ results are then merged with observations to create a set of deposition estimates that better align with measurements than model results alone. The full description of this methodology is available in: Schwede et al., 2014. There is a two year lag between the source data and the TCA Assessment year, so source data 3-year ranges with assessment year in parentheses are: 2016-2018 (2020 assessment), 2017-2019 (2021 assessment), 2018-2020 (2022 assessment), 2019-2021 (2023 assessment), 2020-2022* (2024 assessment). *The data used in the 2024 assessment had a small gap in western North and South Dakota, which was filled with data from the 2019-2021 product due to the small amount of interannual variability in the region.</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data Format:</span></span><span><span> Raster data are continuous</span></span></p><p style='font-weight:bold;margin:0 0 11 0;'><span><span>Units:</span></span><span><span> kg/ha/yr</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Spatial Resolution:</span></span><span><span> 400m (resampled from 4km)</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Source data:</span></span><span><span> </span></span><a href='https://nadp.slh.wisc.edu/committees/tdep/' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Total Deposition Science Committee (TDep)</span></span></a></p><p style='font-weight:bold;margin:0 0 11 0;'><span><span>Additional Resources:</span></span></p><p style='margin:0 0 11 0;'><span><span>Details on </span></span><a href='https://usfs.box.com/s/79vx1b42xg8u6ivjombxjes36nzfhgml' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Method Changes and Source Data Versions</span></span></a></p><p style='margin:0 0 11 0;'><span><span>Overview of the Terrestrial Condition Assessment: </span></span><a href='https://terrestrial-condition-assessment-usfs.hub.arcgis.com/' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Hubsite</span></span></a><span><span> or </span></span><a href='https://www.youtube.com/watch?v=Kf0P3cAq1rs&list=PLwRbAc4x5n94rLca1CXXuugtRDt_G666M&index=19' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Landfire Office Hour Presentation</span></span></a></p><p style='margin:0 0 11 0;'><span><span>Explore the results of the most recent assessment: </span></span><a href='https://apps.fs.usda.gov/gtac-toolsms/tca/' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Interactive Data Viewer</span></span></a></p><p style='margin:0 0 11 0;'><span>Learn more about the TCA KPI: Dashboard link when available</span></p></div></div></div>
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<div style='text-align:Left;'><div><div><p><span>Terms of Use</span></p><p><span>The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.</span></p><p><span>Additionally, the U.S. Forest Service waives copyright and related rights in the work worldwide through the CC0 (which can be found at https://creativecommons.org/public-domain/cc0/).</span></p><p><span>In accordance with Federal civil rights law and U.S. Department of Agriculture (USDA) civil rights regulations and policies, the USDA, its Agencies, offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color, national origin, religion, sex, disability, age, marital status, family/parental status, income derived from a public assistance program, political beliefs, or reprisal or retaliation for prior civil rights activity, in any program or activity conducted or funded by USDA (not all bases apply to all programs). Remedies and complaint filing deadlines vary by program or incident.</span></p><p><span>Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the State or local Agency that administers the program or contact USDA through the Telecommunications Relay Service at 711 (voice and TTY). Additionally, program information may be made available in languages other than English.</span></p><p><span>To file a program discrimination complaint, complete the USDA Program Discrimination Complaint Form, AD-3027, found online at How to File a Program Discrimination Complaint and at any USDA office or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call (866) 632-9992. Submit your completed form or letter to USDA by: (1) mail: U.S. Department of Agriculture, Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Mail Stop 9410, Washington, D.C. 20250-9410; (2) fax: (202) 690-7442; or (3) email: program.intake@usda.gov.</span></p><p><span>USDA is an equal opportunity provider, employer, and lender.</span></p></div></div></div>
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| catalogPath:
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| title:
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USFS_EDW_TCA_NitrogenDeposition
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| type:
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Image Service
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| url:
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| tags:
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["TCA","Terrestrial Condition Assessment","Nitrogen","Deposition","Geospatial Office","USFS"]
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| culture:
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en-US
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| portalUrl:
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| name:
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USFS_EDW_TCA_NitrogenDeposition
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150000000
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| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere
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