| snippet:
|
The Acute Ozone Exposure metric is one component of the Air Pollution Indicator. Along with the Chronic Ozone Exposure metric, it assesses ozone impacts to vegetation during the growing season (April to September). This multidimensional dataset represents acute ozone exposure for the TCA Assessment years 2020-2024.
|
| summary:
|
The Acute Ozone Exposure metric is one component of the Air Pollution Indicator. Along with the Chronic Ozone Exposure metric, it assesses ozone impacts to vegetation during the growing season (April to September). This multidimensional dataset represents acute ozone exposure for the TCA Assessment years 2020-2024.
|
| accessInformation:
|
Lefohn, Knudsen, and Shadwick (2011, https://webcam.srs.fs.usda.gov/ozone/spatial/2010/contractor_2010.pdf); https://www.epa.gov/sites/default/files/2015-09/documents/w126_steps_to_calculate_revised_feb19.pdf
|
| thumbnail:
|
thumbnail/thumbnail.png
|
| maxScale:
|
5000
|
| typeKeywords:
|
["ArcGIS Server","Data","Image Service","Service"]
|
| description:
|
<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_Ozone_Exposure_Chronic.zip' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Direct Download (Raster Data Gateway)</span></span></a></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Objective:</span></span><span><span> Assess impacts</span></span><span><span> to vegetation from acute exposure to ozone (O3) during the growing season (April to September).</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data:</span></span><span><span> Two exposure indices were calculated from hourly O3 data collected by the EPA to track effects from chronic O3 exposure (W126 index) and acute O3 exposure (N100). The W126 index is a weighted measure of chronic (lower level) ozone exposure with an explanation of its daily, monthly, annual, and multi-year average values is available </span></span><a href='https://www.epa.gov/sites/default/files/2015-09/documents/w126_steps_to_calculate_revised_feb19.pdf' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>here</span></span></a><span><span>. For both indices, hourly data was used to calculate monthly values. Monitoring sites were only included if at least 75% of the hourly observations were available, and monthly values were corrected to account for any missing data following the procedures of Lefohn, Knudsen, and Shadwick (2011). Corrected monthly values were totaled across the growing season to generate an annual value. Annual values were averaged over the most recently available 3 year period to generate a value for each site. Site values were then interpolated using inverse distance weighting to attribute values to landscapes within 40 km of a monitoring site. There is typically a 1 year lag between the TCA assessment year and the most recently available for instance, for the 2024 TCA Assessment, ozone data from 2021-2023 were used to compute the 3-year average. For the 2023 TCA Assessment, 2022 ozone source data was not available so the same data from the prior assessment was used. Source data ranges and assessment year in parentheses are: 2017-2019 (TCA Assessment 2020), 2018-2020 (TCA Assessment 2021), 2019-2021 (TCA Assessment 2022), 2019-2021 (TCA Assessment 2023), and 2021-2023 (TCA Assessment 2024).</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data Format:</span></span><span><span> Point (site data) interpolated through inverse distance weighting and filtered to areas only within 40 km of an O3 monitor.</span></span></p><p style='font-weight:bold;margin:0 0 11 0;'><span><span>Units:</span></span><span><span> W126 is expressed in parts per million of O3-hours or ppm-hours</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Spatial Resolution:</span></span><span><span> 1000m (1km)</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://aqs.epa.gov/aqsweb/airdata/download_files.html' target='Raw' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>EPA Hourly Ozone data</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><span>Learn more about the TCA KPI: </span></span><a href='https://cxodashboard.dl.usda.gov/t/NRE/views/EcologicalConditionOutcomes_17531128629260/EcologicalOutcomes' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Dashboard</span></span></a></p><p><span><span>*if you have trouble viewing the Dashboard, please submit a</span></span><span><span> </span></span><a href='https://usdagcc.sharepoint.com/sites/fs-wo-cdoc/SitePages/Dashboards.aspx' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Tableau Viewer Access Request</span></span></a></p></div></div></div>
|
| licenseInfo:
|
<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>
|
| catalogPath:
|
|
| title:
|
USFS_EDW_TCA_OzoneChronic
|
| type:
|
Image Service
|
| url:
|
|
| tags:
|
["TCA","Terrestrial Condition Assessment","Air pollution","Ozone","Chronic exposure","CONUS","W126","Geospatial Office","USFS"]
|
| culture:
|
en-US
|
| portalUrl:
|
|
| name:
|
USFS_EDW_TCA_OzoneChronic
|
| guid:
|
|
| minScale:
|
150000000
|
| spatialReference:
|
WGS_1984_Web_Mercator_Auxiliary_Sphere
|