U.S. Carbon Dioxide Emissions Trends and Projections: Role ...
Rapid Carbon Assessment of the U.S.: Project Overview and Summary
-
Upload
externalevents -
Category
Education
-
view
11 -
download
0
Transcript of Rapid Carbon Assessment of the U.S.: Project Overview and Summary
![Page 1: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/1.jpg)
Rapid Carbon Assessment of US
Rapid Carbon Assessment of the U.S. : Project Overview and SummarySkye WillsTerry Loecke, Stephen Roecker,Zamir Libohova, and Soil Survey Staff
March 21 – 23, 2017Presentation for the Global Soil Partnership, Global Symposium on Soil Organic Carbon
![Page 2: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/2.jpg)
Rapid Carbon Assessment of US
Objective: Base-line inventory of soil carbon stocks for conterminous U.S.Evaluate impact of ecosystems, land use and cover
![Page 3: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/3.jpg)
Rapid Carbon Assessment of US
Multi-stage Stratified Random Sampling► Not enough resources to sample all soil series► Target sampling
► Stratified Random Sampling– 17 regions
• (conterminous U.S.)► Within region Stratification
► 8 – 20 groups of soil series*► 6 LULC
► 5 types of Land use / cover (LULC): Cropland, Pastureland, Rangeland, Forest land, Wetland
*Wills et al., 2013
![Page 4: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/4.jpg)
Rapid Carbon Assessment of US
RaCA Data CollectedInformation collected on
– 6,147 sites– 32, 053 pedons– 144,833 samples
![Page 5: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/5.jpg)
Rapid Carbon Assessment of US
RaCA Data CollectedSite Information: landscape, vegetation, managementPedon Description and sample collection
– 5 pedons described– Samples collected by horizon to 1m– Bulk density samples collected to 50cm
Lab Analysis– All pedons
• Bulk Density*• Visible – Near Infrared Spectra
– Central pedon (1 per site)• Combustion – total carbon• Calcimeter – inorganic carbon
*Sequiera et al., 2014
![Page 6: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/6.jpg)
Rapid Carbon Assessment of US
% SOC by Depth Bulk Density (g cm-3)
![Page 7: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/7.jpg)
Rapid Carbon Assessment of US
Summaries
![Page 8: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/8.jpg)
Rapid Carbon Assessment of US
Land Use – Land Cover SOC stocks stacked by depth increment
![Page 9: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/9.jpg)
Rapid Carbon Assessment of US
Area Weighted - Land Use – Land Cover SOC stocks stacked by depth increment
![Page 10: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/10.jpg)
Rapid Carbon Assessment of US
![Page 11: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/11.jpg)
Rapid Carbon Assessment of US
![Page 12: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/12.jpg)
Rapid Carbon Assessment of US
Preliminary Stocks (1 m)
![Page 13: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/13.jpg)
Rapid Carbon Assessment of US
Conclusions• RaCA collected 6,000 pedons across the conterminous
United States• SOC stocks are skewed with a few very high values• Most SOC occurs within 5 – 30cm• Wetlands have the highest typical SOC stocks and
Rangelands have the lowest• A satisfactory map was made across the conterminous
US
![Page 14: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/14.jpg)
Rapid Carbon Assessment of US
Questions?
![Page 15: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/15.jpg)
Rapid Carbon Assessment of US
References– Wills, S., Seybold, C., Chiaretti, J., Sequeira, C., & West, L. (2013).
Quantifying tacit knowledge about soil organic carbon stocks using soil taxa and official soil series descriptions. Soil Science Society of America Journal, 77(5), 1711-1723.
– Sequeira, C. H., Wills, S. A., Seybold, C. A., & West, L. T. (2014). Predicting soil bulk density for incomplete databases. Geoderma, 213, 64-73.
– Soil Survey Staff and T. Loecke. 2016. Rapid Carbon Assessment: Methodology, Sampling, and Summary. S. Wills (ed.). U.S. Department of Agriculture, Natural Resources Conservation Service.
– Kern, J. S. (1994). Spatial patterns of soil organic carbon in the contiguous United States. Soil Science Society of America Journal, 58(2), 439-455.
– Guo, Y., Amundson, R., Gong, P., & Yu, Q. (2006). Quantity and spatial variability of soil carbon in the conterminous United States. Soil Science Society of America Journal, 70(2), 590-600.
![Page 16: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/16.jpg)
Rapid Carbon Assessment of US
Data AvailabilitySearch engine: RaCA soilAll methodology and data (including R scripts used to make these figures)https://go.usa.gov/xXCjD
– Full url: https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/?cid=nrcs142p2_054164#methodology
R package: soilDB– fetchraca()
https://go.usa.gov/xXCjD
![Page 17: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/17.jpg)
Rapid Carbon Assessment of US
Example slides to follow…………
![Page 18: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/18.jpg)
Rapid Carbon Assessment of US
![Page 19: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/19.jpg)
Rapid Carbon Assessment of US
![Page 20: Rapid Carbon Assessment of the U.S.: Project Overview and Summary](https://reader034.fdocuments.net/reader034/viewer/2022051706/58e4e62e1a28ab87378b4e61/html5/thumbnails/20.jpg)
Rapid Carbon Assessment of US