Peat emission factors: Navigating the IPCC wetland supplement

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Kristell Hergoualc’h and Erin Swails
13 April 2020
Session 1
Peat Emission Factors:
Navigating the IPCC Wetland
Supplement

Objectives
Navigate the Wetland IPCC
supplement to:
• Present linkages between the
2006 IPCC guidelines and the
supplement...

Introduction: Overview of the guidelines
2006 IPCC Guidelines on wetlands restricted to
peatlands drained & managed for pe...

Introduction: Overview of the guidelines

Introduction: Overview of the guidelines
Chapters 2 and 3 in the Wetlands Supplement do not
provide additional guidance fo...

Introduction: Methodological Tiers
• Tier: A level of methodological complexity
• Tier 1: Default method. Equations & emis...

Chapter 2: Drained inland organic soils
• Updates Vol. 4 in 2006 IPCC Guidelines for soils on:
- Carbon dioxide (CO2) emis...

Chapt.2: Drained org.
soils CO2

Chapt.2: Drained org.
soils N2O
EF in Table 2.5 (kg N2O-N ha-1 yr-1)

Chapt.2: Drained org.
soils CH4
CH4 / CO - Fire
emissions
Equation 2.8

Chapt.2: Drained org. soils - CO2
EF in Table 2.2: for the tropics 0.82 t CO2-C ha-1 yr-1
EF in Table 2.1 (t CO2-C ha-1 yr...

Chapt.2: Drained org. soils - FIRES
CO2 from wildfire
353 (t dm ha-1) ´ 464 (g
CO2-C kg-1 ) ´ 10-3 ´
(44/12)
= 601 t CO2 h...

Chapt.2: Drained org. soils - FIRES
Fire type CO2 95% CI CO 95% CI CH4 95% CI
Mg CO2 ha-1 Mg CO ha-1 Mg CH4 ha-1
Wildfire ...

Chapt.2: Drained org. soils - CH4
§ EFCH4_land in Table 2.3 (kg CH4 ha-1 yr-1), disaggregated by
land use type
§ EFCH4_dit...

Chapt.3: Rewetted Organic Soils
§ CO2, CH4 while N2O assumed to be negligible
§ CO2 fluxes

Chapt.3: Rewetted Organic Soils – CO2
In the tropics:
§ EFCO2 = 0 t CO2-C ha-1 yr-1
§ EFDOC_REWETTED = 0.9 ´ 0.57 = 0.51 t...

Chapt.3: Rewetted Organic Soils – CH4
In the tropics, EFCH4 soil = 41 kg CH4 ha-1 yr-1
EFCH4 soil
(Table 3.3)
Cf. Chapt. 2

Acknowledgements
The capacity building materials were made possible through a grant
given by the Norway’s International Cl...

Thank you

Peat emission factors: Navigating the IPCC wetland supplement

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