Introduction to GSOC map

Introduction to GSOC map

• 1.
  GSOC map  Introductionto SOC mapping  GSOC mapping guideline  Product specifications  Existing SOC maps  Methodologies
• 2.
  Background  Precise andreliable 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 collection of national SOC estimates, utilizing as many soil data as possible, could provide a new reliable layer of reference SOC stocks around the globe .  GSOC map was initiated by UNCCD-SDI and GSP-ITPS
• 3.
  Background Scharlemann et al2014 “Climate change models are currently using soil carbon estimates that vary by an order of magnitude. We’re creating scenarios of climate change, and basing decisions on these scenarios, even though the input data are actually really uncertain.” “Decisions on soil carbon management require an improved understanding of the global variation in carbon stocks, as well as their importance relative to carbon stored in vegetation.” Rosser et al 2012
• 4.
  Background Ladd et al2012 “The lack of correlation between the measured values of soil carbon and the values from the FAO harmonized world soil map indicate that substantial improvements in the production of soil carbon maps are needed and possible..”
• 5.
  National coordination  Reportingunder SDG 15.3.1, subindicator soil carbon, linking soils with national agro-environmental statistics  Support to UNCCD LDN target setting programme, soil carbon is progress indicator  Reporting under UNFCCC GHG programme (LULUCF soil C pool and pool changes): GSOC map allows for Tier 2 reference C stocks  Soil carbon as indicator for soil health and land resilience in national mitigation and adaptation programmes International coordination  UNFCCC – UNCCD – WMO - GSP conference: GSOC17, March 2017  GSP Pillar 4 productsITPS /Status of the world soil resources
• 6.
  GSP GSOC mappingguideline:  Country-driven approach  Generate national SOC maps as 1 km 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 (it is possible to subdivide depth classes, e.g. following GlobalSoilMap specifications: 0-5 cm, 5- 15 cm, 15-30 cm, lower depth classes > 30 cm are optional for GSOC map, but will be included in Pillar 4 soil grids)  Build on existing national capacities and extend these  Develop first indicator for the Global Soil Information System (GSIS) - GSP demonstration project (Version 0 soil grids) Methodical considerations
• 7.
  Soil Polygon map Soilprofiles 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
• 8.
  National SOC mapexists 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
• 9.
  Detailed Specifications 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 analyzed.
• 10.
  Specification 3: Sharemetadata 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 bulk density Derive data from soil horizons for d = 0-30 cm Detailed Specifications Metadata
• 11.
  Specification 4: Sharedetails 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 Detailed Specifications Metadata
• 12.
  Data sharing procedure National SOC maps 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).
• 13.
   Cookbook previousand future workshops  Capacity planning/development Implementation
• 14.
  To prepare thecookbook, an extensive literature review has been conducted. Cookbook and e-learning A cookbook for SOC mapping is currently prepared by voluntary input from an open team of authors. If you have interest to contribute based on national experiences in SOC mapping, contact: [email protected] Together with the cookbook, an e-learning tool will be made available.
• 15.
  41 c Publications aboutnational SOC map activities were found for 41 countries. 8. Literature 8.1 General Literature on SOC inventories and spatial modelling (19) 8.2 Specialized methodical literature 8.2.1 Bulk density (22) 8.2.2 Digital Elevation Models (6) 8.2.3 Inorganic carbon (1) 8.2.4 Digital Soil Mapping (21) 8.2.5 Vertical SOC, Depth profiles (8) 8.2.6 Rock content (1) 8.2.7 Soil carbon analysis (3) 8.2.8 Soil carbon monitoring (5) 8.2.9 Remote sensing, spectroscopy (5) 8.2.10 Uncertainties (4) 8.3 National SOC inventories 8.3.1 North America (2C, 4) 8.3.2 Near East and Sub-saharan Africa (9C, 12) 8.3.3 Asia (6C, 9) 8.3.4 Central/South America (2C, 2) 8.3.5 Pacific (2C, 5) 8.3.6 Eurasia (1C, 3) 8.3.7 Europe (19C, 45 / 1Europe, 4) 8.4 Regional SOC inventories (18C 20) Cookbook literature overview [C = countries]
• 16.
  Capacity planning Planning ofnational capacity (personnel, time) Planning of additional needs (equipment, training)
• 17.
  Capacity planning  reflectabout the guideline and how to implement Each workshop participant, to reflect and share…  choose national approach  contact relevant national institutions  INSII member to contact national focal point, also RSP colleagues (P4) not attending this workshop  develop a work plan (who, what, when); coordinate with national focal point Basis for RSP/GSP secretariats to plan actions.
• 18.
  Digitize any SOCdata from sampling if not done so (e.g. from soil profile description and analysis) Collect SOC concentration data, Buld density (BD), stones (coarse fragments), spatial coordinates Preparatory technical steps Prepare soil profile data: Prepare covariates: soil, geology, climate, land cover, land form (simple and complex relief indicators) Calculate SOC stocks for 0-30 cm (= forest floor is possible)
• 19.
  Technical SOC mapping seepresentation by G. F. Olmedo