Superfast

The five SuperFast rate-law helper functions migrated from GasChem.jl@8c12c048482b515fb8eb2110bf8ab4b4f4e71309 src/SuperFast.jl — the reusable builder functions the SuperFast() chemical mechanism uses to construct the rate coefficient of every gas-phase reaction. Each is migrated as its own observed-only algebraic `models` entry: rate_toppb (SuperFast.jl:6) the constant-rate / `constant_k` converter, arrh (:33) the modified-Arrhenius workhorse, arr_3rd (:64) the third-body / Troe-falloff law, rate_2HO2 (:102) the HO2+HO2 law with water-vapour enhancement, and rate_OH_CO (:142) the JPL 15-10 OH+CO law. Upstream each function returns a one-variable ReactionSystem (`@variables k(t)`); the composed builders (arr_3rd, rate_2HO2, rate_OH_CO) compose `arrh` sub-systems. This file reproduces each function's compiled rate as a topologically-ordered cascade of `type: state` algebraic equations whose named intermediates mirror the upstream Julia locals and sub-system k's verbatim, with the Arrhenius coefficients exposed as `type: parameter` (defaults taken from the representative SuperFast reaction each builder serves). All five models are purely algebraic — no time derivatives — so each rate coefficient is constant in time. Units follow the upstream's mixed CGS / ppb system (rate coefficients in 1/(s*ppb), Arrhenius pre-exponentials in cm^3/molec/s).

The five SuperFast rate-law helper functions migrated from GasChem.jl@8c12c048482b515fb8eb2110bf8ab4b4f4e71309 src/SuperFast.jl — the reusable builder functions the SuperFast() chemical mechanism uses to construct the rate coefficient of every gas-phase reaction. Each is migrated as its own observed-only algebraic `models` entry: rate_toppb (SuperFast.jl:6) the constant-rate / `constant_k` converter, arrh (:33) the modified-Arrhenius workhorse, arr_3rd (:64) the third-body / Troe-falloff law, rate_2HO2 (:102) the HO2+HO2 law with water-vapour enhancement, and rate_OH_CO (:142) the JPL 15-10 OH+CO law. Upstream each function returns a one-variable ReactionSystem (`@variables k(t)`); the composed builders (arr_3rd, rate_2HO2, rate_OH_CO) compose `arrh` sub-systems. This file reproduces each function's compiled rate as a topologically-ordered cascade of `type: state` algebraic equations whose named intermediates mirror the upstream Julia locals and sub-system k's verbatim, with the Arrhenius coefficients exposed as `type: parameter` (defaults taken from the representative SuperFast reaction each builder serves). All five models are purely algebraic — no time derivatives — so each rate coefficient is constant in time. Units follow the upstream's mixed CGS / ppb system (rate coefficients in 1/(s*ppb), Arrhenius pre-exponentials in cm^3/molec/s).

The five SuperFast rate-law helper functions migrated from GasChem.jl@8c12c048482b515fb8eb2110bf8ab4b4f4e71309 src/SuperFast.jl — the reusable builder functions the SuperFast() chemical mechanism uses to construct the rate coefficient of every gas-phase reaction. Each is migrated as its own observed-only algebraic `models` entry: rate_toppb (SuperFast.jl:6) the constant-rate / `constant_k` converter, arrh (:33) the modified-Arrhenius workhorse, arr_3rd (:64) the third-body / Troe-falloff law, rate_2HO2 (:102) the HO2+HO2 law with water-vapour enhancement, and rate_OH_CO (:142) the JPL 15-10 OH+CO law. Upstream each function returns a one-variable ReactionSystem (`@variables k(t)`); the composed builders (arr_3rd, rate_2HO2, rate_OH_CO) compose `arrh` sub-systems. This file reproduces each function's compiled rate as a topologically-ordered cascade of `type: state` algebraic equations whose named intermediates mirror the upstream Julia locals and sub-system k's verbatim, with the Arrhenius coefficients exposed as `type: parameter` (defaults taken from the representative SuperFast reaction each builder serves). All five models are purely algebraic — no time derivatives — so each rate coefficient is constant in time. Units follow the upstream's mixed CGS / ppb system (rate coefficients in 1/(s*ppb), Arrhenius pre-exponentials in cm^3/molec/s).

The five SuperFast rate-law helper functions migrated from GasChem.jl@8c12c048482b515fb8eb2110bf8ab4b4f4e71309 src/SuperFast.jl — the reusable builder functions the SuperFast() chemical mechanism uses to construct the rate coefficient of every gas-phase reaction. Each is migrated as its own observed-only algebraic `models` entry: rate_toppb (SuperFast.jl:6) the constant-rate / `constant_k` converter, arrh (:33) the modified-Arrhenius workhorse, arr_3rd (:64) the third-body / Troe-falloff law, rate_2HO2 (:102) the HO2+HO2 law with water-vapour enhancement, and rate_OH_CO (:142) the JPL 15-10 OH+CO law. Upstream each function returns a one-variable ReactionSystem (`@variables k(t)`); the composed builders (arr_3rd, rate_2HO2, rate_OH_CO) compose `arrh` sub-systems. This file reproduces each function's compiled rate as a topologically-ordered cascade of `type: state` algebraic equations whose named intermediates mirror the upstream Julia locals and sub-system k's verbatim, with the Arrhenius coefficients exposed as `type: parameter` (defaults taken from the representative SuperFast reaction each builder serves). All five models are purely algebraic — no time derivatives — so each rate coefficient is constant in time. Units follow the upstream's mixed CGS / ppb system (rate coefficients in 1/(s*ppb), Arrhenius pre-exponentials in cm^3/molec/s).

The five SuperFast rate-law helper functions migrated from GasChem.jl@8c12c048482b515fb8eb2110bf8ab4b4f4e71309 src/SuperFast.jl — the reusable builder functions the SuperFast() chemical mechanism uses to construct the rate coefficient of every gas-phase reaction. Each is migrated as its own observed-only algebraic `models` entry: rate_toppb (SuperFast.jl:6) the constant-rate / `constant_k` converter, arrh (:33) the modified-Arrhenius workhorse, arr_3rd (:64) the third-body / Troe-falloff law, rate_2HO2 (:102) the HO2+HO2 law with water-vapour enhancement, and rate_OH_CO (:142) the JPL 15-10 OH+CO law. Upstream each function returns a one-variable ReactionSystem (`@variables k(t)`); the composed builders (arr_3rd, rate_2HO2, rate_OH_CO) compose `arrh` sub-systems. This file reproduces each function's compiled rate as a topologically-ordered cascade of `type: state` algebraic equations whose named intermediates mirror the upstream Julia locals and sub-system k's verbatim, with the Arrhenius coefficients exposed as `type: parameter` (defaults taken from the representative SuperFast reaction each builder serves). All five models are purely algebraic — no time derivatives — so each rate coefficient is constant in time. Units follow the upstream's mixed CGS / ppb system (rate coefficients in 1/(s*ppb), Arrhenius pre-exponentials in cm^3/molec/s).

Operator model that turns first-order dry + wet deposition loss-rate coefficients into additive sink terms on a SuperFast-family gas-phase mechanism. Each equation is D(<X>) ~ -(k_dry + k_wet)*<X> over the model's OWN species unknowns; when this model is merged with a SuperFast reaction system via an `operator_compose` coupling (systems: [<Chem>, SuperFastDepositionSink]), the flattener matches each sink equation's dependent variable to the chemistry system's state of the same species name and sums the two right-hand sides (dc/dt += -k*c), then retires the sink's own declaration of that name (esm-spec 10.1/10.2 — direct match, else the bare-name match). The deposition rate coefficients are exposed as parameters so they can be driven from the full DryDepositionGas (Wesley 1989) and WetDeposition (EMEP) components via param_to_var edges in an assembly. Species->rate mapping mirrors AtmosphericDeposition.jl/ext/GasChemExt.jl couple2(SuperFastCoupler, DryDepositionGasCoupler / WetDepositionCoupler): NO reuses NO2's dry-dep rate; CH2O uses the formaldehyde (HCHO) dry-dep rate; the wet rate k_wet is the lumped soluble-gas WetDeposition.k_othergas applied to HNO3, H2O2, CH2O, CH3OOH.