add Rock weathering as Carbon Dioxide Removal Technology#2229
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BertoGBG wants to merge 11 commits into
Open
add Rock weathering as Carbon Dioxide Removal Technology#2229BertoGBG wants to merge 11 commits into
BertoGBG wants to merge 11 commits into
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Ported from the a_CDRs development branch. Adds enhanced rock weathering (CDR via accelerated mineral carbonation) as an optional CDR technology: a single Link per node draws electricity and atmospheric CO2 into a fixed-capacity Store representing the cumulative mineral-carbonation potential, dimensioned from CORINE-eligible land area filtered by an annual-mean-temperature threshold (atlite cutout), rather than a bioclimate-zone raster. Shares the build_available_land aggregation step with the biochar/afforestation PRs (kept byte-identical to avoid conflicts whichever merges first); the availability-matrix step itself is rock weathering's own script since it needs the temperature exclusion the shared determine_availability_matrix.py doesn't have. Off by default (sector.rock_weathering: false). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
# Conflicts: # doc/release_notes.md
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Closes # (if applicable).
Changes proposed in this Pull Request
This PR introduces Enhanced Rock Weathering as Carbon Dioxide Removal (CDR) technology, based on #2142
Rock weathering is a land-based CDR technology and its technical potential is related to the land availability. For this CDR and future land-based CDR the land available is calculated from the Corine Land Cover dataset using the new script build_available_land.py which is based on scripts/determine_availability_matrix.py.
In the case of Rock weathering it is introduced a filter for mean annual air temperature as weathering rates drop drastically at low temperatures. This is done in the scripts/determine_rock_weathering_availability_matrix.py which is essentially the same of the base determine_availability_matrix.py with added temperature threeshold.
#NOTE: rock_weathering's land-eligibility settings (corine, natura, cutout, excluder_resolution) live under renewable: rather than a CDR-specific namespace. This is because build_available_land.py/determine_rock_weathering_availability_matrix.py reuse the same atlite ExclusionContainer machinery and config shape that determine_availability_matrix.py already uses for onwind/offwind/solar, read generically via config_provider("renewable", w.technology, ...). It's a pragmatic reuse of existing land-eligibility infrastructure, not a claim that rock weathering is a power-generation technology.
Open to moving it to a separate namespace if preferred. It is especially worth deciding now, before biochar/afforestation following the same pattern will be added.
The actual implementation of the CDR technology is part of scripts/prepare_sector_network.py
The default.config.yaml contains the main parameters for calculating the CDR potential, and sets rock_weathering default to false.
NOTE on Technology-data version.
Data dependency note (technology-data)
add_rock_weathering() requires the "Enhanced Weathering" cost entries, which are not part of technology-data v0.14.0 — the version currently pinned in data/versions.csv (costs/"latest supported"). They're already included in
technology-data v0.15.0, already tagged/released.
However, I found v0.15.0 also includes a deliberate breaking rename (technology-data#264): "electricity grid connection" → "distribution grid reinforcement". That needs a corresponding one-line update in add_electricity_grid_connection() (prepare_sector_network.py) — small, but out of scope for the rock-weathering PR.
Checklist
Required:
doc/release_notes.md.If applicable:
scripts/lib/validation.doc/*.mdfiles.