Science Hub
Landing page for biochar scientific research notes—definition, permanence, literature, CDR accounting, and debates. Production, agronomic effects, and materials uses now have their own hubs (Production Hub, Applications Hub); this page stays focused on the science core.
Synthesized from the science research report (2026-09-14) plus permanence expansion (2026-09-16); citations from that report, primary sources in Key Sources, and checked PDFs (Woolf open copy, IPCC App. 4, EBC 10.5E, S668).
Primary links / Primary science links
| Resource | URL |
|---|---|
| IPCC 2019 biochar appendix (PDF) | https://www.ipcc-nggip.iges.or.jp/public/2019rf/pdf/4_Volume4/19R_V4_Ch02_Ap4_Biochar.pdf · estimates soil C stock change from biochar |
| reviews biochar climate mitigation (Nat. Geosci.) | https://doi.org/10.1038/s41561-021-00852-8 |
| Biochar Soil GHG Inventory Model (ES&T) | https://doi.org/10.1021/acs.est.1c02425 |
| Woolf et al. 2010 (Nat. Commun.) | https://doi.org/10.1038/ncomms1053 |
| IUPAC biochar terminology IUPAC glossary | https://doi.org/10.1515/pac-2021-0106 |
| Weng & Cowie 2025 | https://doi.org/10.1038/s43247-025-02228-x |
| State of CDR Ch. 10 (CDR costs and potentials) | https://doi.org/10.17605/OSF.IO/FBZ4X |
| Schmidt et al. 2025 permanence commentary | https://doi.org/10.1111/gcbb.70092 |
| inertinite permanence benchmark inertinite / Ro | https://doi.org/10.1016/j.coal.2023.104409 |
| EBC | https://www.european-biochar.org/ |
| IBI | https://biochar-international.org/ |
Core concepts
- Overview and Definition — IUPAC / IPCC definitions; what biochar is not
- Permanence — hub for persistence science
- H-Corg and O-Corg — elemental-ratio proxies
- Permanence Factors Fperm — inventory permanence factors
- Biochar Soil GHG Inventory Model — Woolf et al. 2021 soil GHG inventory method
- Reflectance Ro and HyPy — petrography & HyPy-resistant C
- Soil Temperature and Environment — Q10 and environmental controls
- Permanence Debates — model vs inertinite camps; horizon choice
- Quantitative Benchmarks — numbers cheat-sheet
Literature
- Foundational Papers — historically influential works
- Recent Research 2021-2026 — reviews, methods, empirical metas
- Terra Preta and Pyrogenic Carbon — Amazonian Dark Earths analog
- Consensus vs Debates
CDR & inventory accounting
Related domains (moved out of this folder)
| Domain | Hub / notes |
|---|---|
| How char is made | Production Hub → Production, Pyrolysis Systems and Temperatures, Feedstocks, Woody vs Manure Ag Feedstocks, Biochar Quality from Process, Gasification Residues, Properties, Contaminants and Quality (+ PAH/metals/PFAS/testing chapters) |
| Field & built uses | Applications Hub → Crop Yield Effects, GHG Fluxes, Soil and Agriculture, Materials and Built Uses |
Cross-links to markets & policy
Science underpins credit design: Permanence Science for Credits, MRV Stack, Carbon Markets Hub.
Product and practice layers: Product Standards EBC IBI, Testing EBC IBI S668, NRCS soil carbon amendment in US ag, Policy Hub.