Global Soil Organic Carbon Map GSOC : develop a global SOC by 5th Dec 2017
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This presentation was presented during the second workshop of the International Network of Soil Information Institutions (INSII) that took place at FAO headquarters 24-25 november 2016. The presentation was made by Liesl Wiese from the GSP Secretariat
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Global Soil Organic Carbon Map GSOC : develop a global SOC by 5th Dec 2017
- 1. Global Soil Organic Carbon Map GSOC Background Guidelines Cookbook Roadmap 2017 Timeline Develop a global SOC map by 5th Dec 2017
- 2. Background Precise and reliable global view on soil organic carbon (SOC) is needed under different UN conventions and related processes (SDG, 4per1000) Soil carbon is key indicator related to water and nutrient dynamics of soils, its decomposer activity, and the physical soil structure/stability. A combination of reliable national SOC estimates around the globe can provide a new baseline on the currently existing SOC density. Task initiated by UNCCD-SPI and GSP-ITPS
- 3. Guidelines – overall approach Country-driven approach Generate SOC soil grids (version 0 acc to P4IP): use existing soil profile data and soil (polygon) maps, combined with digital soil mapping Build on UNFCCC/IPCC GHG definitions and reporting methods (see GSP-Guideline, 0-30 cm; (if possible subdivide depth classes; GlobalSoilMap Specs: 0-5 cm, 5-15 cm, 15-30 cm, 30-60 cm, 60-100 cm and 100-200 cm) Build on existing national capacities and extend these Develop first indicator for the Global Soil Information System (GSIS) - GSP demonstration project
- 4. Soil Polygon map Soil profiles SoilSTAT Soil grids Pillar 4 Indicator: soil C stock 0-30 cm (soil organic carbon, mineral soils, peat, O-layer) Representative set of samples from soil profiles with soil C analysis, BD and stones estimated or measured Soil maps as basic data for upscaling DSM Class-/Geomatching Rasterization + land cover, climate, etc. 1k version 0 soil grids
- 5. National SOC map exists YesNo GSP specifications are fulfilled Yes No recalculate Product accomplished: deliver to GSP secretariat Produce new map with own capacity Compile national SOC measurements Yes No Share national SOC data with GSP secretariat to organise the uscaling to 1 km grid Yes 1 2 3 Country-driven approach
- 7. Specification 1: Share auxiliary information about the national data sources, e.g. type of sampling, density of sampling points, sampling design, time of sampling, selection criteria. Metadata Specification 2: Share metadata about SOC analysis method/s, type of analysis; type of apparatus; temperatures used; in case of wet oxidation: method and variations; sample treatment, sample preparation; for calcareous soils: report whether and how inorganic carbon was analysed.
- 8. Specification 3: Share metadata about SOC stocks calculation SOC = d * BD * (Ctot – Cmin) * CFst)Mineral soils SOCforest floor = weightOR * (Ctot – Cmin) Forest floor (O-layer) Peat extent (area) of peat (and peat types), the depth of peat, %C and peat density Derive data from soil horizons for d = 0-30 cm Metadata
- 9. Specification 4: Share details about the upscaling approach 1. Upscaling method (description, citation) 2. Input data/covariates, grid, soil maps, etc. Specification 5: Temporal dimension: share the sampling date. If the national data situation allows, pre-1990 or post-1990 sub data sets might be defined. Quality/capacity: The more data points are used, the better the reliability and accuracy of the SOC map Use options of the resultant map
- 10. Data sharing procedure Data shared by countries will be collected by the GSP Secretariat. The GSP data policy will ensure that the national terms of condition are fully respected. Data can be shared using common GIS formats and metadata should be compiled in an excel file (template will be provided through the cookbook).
- 11. Cookbook Provide detailed data preparation • 0-30 cm • Bulk density • Stone content • Stock calculation • Quality assurance • Etc. Mapping procedures • Mapping techniques (DSM, class matching, etc.) • Covariates • Uncertainty Develop e-learning tool.
- 12. Roadmap 2017 Each workshop participant, to reflect and share… Guideline provides GSOC17 specifications develop a work plan (who, what, when); coordinate with national focal point Feedback to Secretariat: national time frame, method, limitations :
- 13. Timeline • Guidelines – Oct 2016 • Cookbook – Jan 2017 • Contributions by March to showcase at the GSCO Symposium • Maps collected by Secretariat – Aug 2017 • Compilation of global product – 5 Dec 2017
Editor's Notes
- The Global Soil Partnership (GSP) cooperates very closely with various global mechanisms which ad-dress soil issues and which require improved information collection and sharing about the status of soils. This cooperation is important because FAO member countries are involved in various global activities through monitoring and reporting on natural resources, including soils, and it is import to align these activities to improve knowledge and information exchange about soils. The quality of soil carbon information at global level is still limited because much existing national information has not yet been shared for global compilation. A precise and reliable global view on soil organic carbon (SOC) is needed under different UN conventions, such as on climate change and desertification, but especially as part of the Sustainable Development Goals (SDG). For example, under the Framework Convention on Cli-mate Change (UNFCCC), countries address soils and soil carbon in their national greenhouse gas inven-tories. Under the Lima-Paris Action Agenda, the 4 per 1000 Initiative supports the role of carbon stor-age in soils to mitigate and adapt to climate change.
- Guidelines developed to guide mapping specifications, purpose, overview of content, implication for INSII – more concrete Implication – INSII members use the guidelines to plan their mapping process Guideline is a specification of what the map contains and provides options of how it can be developed.
- SOC an indicator and as property (soil grid 1000m raster). Discussion about calculating SOC in different layers and how to manage more than one layer in one grid. Key data source DSM in guideline as generic framework and DSM details in cookbook
- What happens with countries that don‘t have any data? Fill gaps with ISRIC datasets?
- Very important that countries indicate which parameters and details are used. Need to understand what is happening in each country. Will provide template to indicate what information is necessary. Combine specs into one slide.
- NB import the methodologies from IPCC. Countries already complying with IPCC guidelines, this fits in well.
- Discussed issue of baseline and how can this information be used Ultimately want to produce the map as reference layer for SOC. More for modeling and as a substitute for baseline. Most important thing is to demonstrate the data management capacity and stick to the soil grid approach so that it can be updated- improved later. Important to get definitions from ongoing frameworks to do the mapping according the specs and conform with Version 0 grids.
- Different from Pillar 4 – centralized approach where all products are sent directly to the Secretariat. Testing phase for soil data sharing.
- Data Preparatory steps, o-30 cm, BD, stones, Stock calculation, quality assurance of product
- End of Jan preferrably (date open for discussion) Initiallz discussed to have products by March, but need to revise. At least by end Aug have national maps.