GSOC17 Introduction, Product specifications, Existing SOC maps and methodologies

GSOC17

Introduction Product specifications Existing SOC mapsMethodologies

Background

Scharlemann et al 2014

“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

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-SDI and GSP-ITPS

National coordination Reporting under 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): allow 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/IPCC – UNCCD/SPI –GSP/ITPS workshop Pillar 4 capacity/Status of the world soil resources

Methodical considerations 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

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

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

Detailed Specifcations

Specification 1: Share auxiliary information about the national data sources, e.g. type of sampling (soil profile or auger), density of sampling points in the country, sampling design (distribution and sampling depth/s), time of sampling (year), selection criteria (if subset of soil profiles is selected from a larger national database).

Metadata

Detailed SpecifcationsSpecification 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.

Detailed SpecifcationsSpecification 3: Share metadata about SOC stocks calculation

Metadata

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

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

Detailed Specifcations

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

Detailed Specifcations

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).

41 c

Examples to learn from

8. Literature8.1 General Literature on SOC inventories and spatial modelling (19)8.2 Specialized methodical literature8.2.1 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 inventories8.3.1 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 (17C 20)

41 countries

Cookbook literature overview

Examples to learn from41 countries

Capacity planningCookbook previous and future workshopstools

Capacity planning

Planning of national capacity (personnel, time)Planning of additional needs (equipment, training)

Capacity planning

- reflect about the guideline and how to implement

Each workshop participant, to reflect and share…

- choose national approach - contact relevant national

institutions

- 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.

share information about national projects/literature on SOC stock assessments

CookbookIn order to support the writing of the cookbook,

GSP secretariat shares preliminary literature overview!

Develop e-learning tool.

digitize, C, BD, stones, coordinates, 0-30 cm

First technical stepsPrepare soil profile data:

Prepare covariates: soil, geology, climate, land cover, land form