SUEWS parameter database

curated values, linked and searchable, a citation on every one Home · Map · suews.io
browse · archetypes/surfaces/grass/helsinki-finland--unirrigated-grass-jarvi-et-al-2014.yml

Grass · surfaces — Unirrigated Grass, Järvi et al (2014)grass composite

Surface bundlesgrasshelsinkicity

Composition

This composite is assembled from the entries below. Each evidence record keeps its own scientific review; a separate composition review assesses why these components were selected and how they are mapped.

albedoGrassland/herbaceous generic Awaiting sign-off
alb_min 0.19 · alb_max 0.19
emissivityGrass generic Awaiting sign-off
emis 0.93
water_storageGrass swindon Awaiting sign-off
storage_drain_params.store_min 1.9 · storage_drain_params.store_max 1.9
leaf_area_indexGrass helsinki Awaiting sign-off
lai.lai_type 1 · lai.lai_min 1.6 · lai.lai_max 5.9
leaf_growth_powerGrass, LaiEq = 1 helsinki Awaiting sign-off
lai.lai_power.growth_lai 0.04 · lai.lai_power.growth_gdd 0.002 · lai.lai_power.senescence_lai -1.5
drainageGrass, unirrigated generic Awaiting sign-off
storage_drain_params.drain_eq 2 · storage_drain_params.drain_coef_1 0.013 · storage_drain_params.drain_coef_2 1.71
max_vegetation_conductanceUnirrigated Grass generic Awaiting sign-off
max_conductance 33.1
porosityDummy value generic Agent assessed
biogen_co2Grass (lawn) helsinki Awaiting sign-off
alpha_bio_co2 0.031 · beta_bio_co2 5.312 · theta_bio_co2 0.723
snow_lim_patchGrass generic Awaiting sign-off
snowpack_limit 190
vegetation_growthGrass helsinki Curation required
lai.base_temperature 5 · lai.base_temperature_senescence 10 · lai.gdd_full 300
ohm · summer_wetVegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water). Unresolved
a1 0.336 · a2 0.313 · a3 -31.4
ohm · summer_dryVegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water). Unresolved
a1 0.336 · a2 0.313 · a3 -31.4
ohm · winter_wetVegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water). Unresolved
a1 0.336 · a2 0.313 · a3 -31.4
ohm · winter_dryVegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water). Unresolved
a1 0.336 · a2 0.313 · a3 -31.4

Composition provenance

Curation required

Assembled · assessed by provenance-audit · 2026-08-23. Agent assessment is composition review preparation, not human verification.

Vegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water).Selected component

Fills all four ohm positions, summer_wet, summer_dry, winter_wet and winter_dry. The record declares target ohm_coefficients, name "Vegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water)." and source unreferenced; it carries no place or representativeness field. This choice is the subject of the target finding.

Dummy valueSelected component

Fills the porosity slot structurally. The assumed, unreferenced "Dummy value" adapter has an empty parameters mapping and only preserved legacy -999 sentinels, so it contributes no active parameter and makes no literature-value claim.

Grass (lawn)Selected component

Fills the biogen_co2 slot. The record declares target land_cover.grass, name "Grass (lawn)", place helsinki, representativeness city and source havu-m2024.

Grass, LaiEq = 1Selected component

Fills the leaf_growth_power slot. The record declares target land_cover.grass, name "Grass, LaiEq = 1", place helsinki, representativeness city and source havu-m2024-data.

Grass, unirrigatedSelected component

Fills the drainage slot. The record declares target land_cover.grass, name "Grass, unirrigated", place generic, representativeness generic, source jarvi2011 and method literature. Its stable path and origin retain the Helsinki migration identity.

GrassSelected component

Fills the vegetation_growth slot. The record declares target land_cover.grass, name "Grass", place helsinki, representativeness city and source jarvi2014.

GrassSelected component

Fills the snow_lim_patch slot. The stable path and origin retain Helsinki migration lineage, while the record declares target land_cover.grass, name "Grass", place generic, representativeness generic, applicable_scale land_cover, source jarvi2014 and method literature.

Grassland/herbaceousSelected component

Fills the albedo slot. The record declares target land_cover.grass, name "Grassland/herbaceous", place generic, representativeness generic, source vargo2013 and method literature.

GrassSelected component

Fills the leaf_area_index slot. The record declares target land_cover.grass, name "Grass (SE England)", place helsinki, representativeness city and source havu-m2024. Its stable path, name and origin retain the legacy SE England migration text.

GrassSelected component

Fills the emissivity slot. The record declares target land_cover.grass, name "Grass", place generic and representativeness generic; it carries source jarvi2011 and declares method literature.

GrassSelected component

Fills the water_storage slot. The stable path retains SE England migration lineage, while the record declares target land_cover.grass, name "Grass", place swindon, representativeness site, source ward2018 and method literature.

Unirrigated GrassSelected component

Fills the max_vegetation_conductance slot. The record declares target land_cover.grass, name "Unirrigated Grass", place generic, representativeness generic and source breuer2003. Its path reads vancouver--jarvi2011 while its declared place is generic and its declared source is breuer2003, which is recorded under the place finding.

Assessment findings

Composite identitysupported
The composite's name reads "Unirrigated Grass, Järvi et al (2014)", its place reads helsinki and its origin reads Helsinki, Finland, and the entry path spells the same author jarvi as the path slug convention requires. Two of the twelve components declare source jarvi2014, filling snow_lim_patch and vegetation_growth, and three more declare source havu-m2024, filling leaf_area_index, leaf_growth_power and biogen_co2, so the study in the label supplies one-sixth of the assembly rather than most of it. The unirrigated qualifier is carried consistently by two components: records/surfaces/grass/helsinki--jarvi2014--drainage is named "Grass, unirrigated" and now traced to jarvi2011, records/surfaces/grass/vancouver--jarvi2011--max-conductance--unirrigated-grass is named "Unirrigated Grass". The albedo record is named "Grassland/herbaceous" and makes no irrigation claim, so it is neutral rather than additional support for the qualifier.
Composite targetcuration required
The composite declares target land_cover.grass. Eleven of the twelve components declare target land_cover.grass and the twelfth, records/ohm/generic--unreferenced--all-vegetation--vegetation-average-200-this-is-the-average-of-codes-20-30-50-51-52-53-60-i-e-includes-soil-and-water, declares target ohm_coefficients, which is what the ohm slot takes: docs/FORMAT.md puts the four season and wetness positions of supy's ohm_coef on the archetype rather than on the coefficient records. Surface records carry no attaches_to field, which in this database appears only on the profile records under records/profiles/, so the slot check rests on the parameter names each component carries, and every slot receives a component holding the fields that slot names. The ohm slot is the one that does not sit right. It receives the a1, a2 and a3 coefficients it names, but from a set whose declared scope is wider than the composite's surface: the component is named "Vegetation (average). [200] This is the average of Codes 20, 30, 50, 51, 52, 53, 60 (i.e. includes soil and water).", so the record itself states that it averages vegetated, bare-soil and water surfaces, and it fills all four season and wetness positions of a composite whose target is land_cover.grass. The database holds a grass-specific unreferenced set, records/ohm/generic--unreferenced--grass, named "Short grass [30]", which five of the nine grass composites take; archetypes/surfaces/grass/helsinki-finland--irrigated-grass-jarvi-et-al-2014 and archetypes/surfaces/grass/helsinki-finland--unirrigated-grass-jarvi-et-al-2014 are the only two taking the vegetation average. Substituting one for the other changes a model input, so it is not a correction to make from a composition review. A maintainer should decide whether the vegetation-average set is what the legacy composite rows intended for these two entries or an artefact of the migration, and settle both together.
Own parameter valuesnot applicable
The composite declares no parameters of its own, so it overrides no component value; the exported fragment is its components merged into their slots.
Composition rationalenot applicable
The composite declares no source field and asserts no parameters of its own, so there is no published composition rationale to review. The archetype format does allow a composite to carry a source, as the snow archetypes do for the scalars they assert themselves, and this entry carries none. Each component's own source belongs to that component's evidence assessment.
Place applicabilitycuration required
The composite declares place helsinki. Four components carry that place, one site-scoped water-storage record carries place swindon, six are generic and the OHM record carries no place. Snowpack limit is one of the generic literature inputs. The Swindon site import needs an explicit Helsinki composition rationale. One further divergence should be recorded without being settled here: the conductance component's path reads records/surfaces/grass/vancouver--jarvi2011--max-conductance--unirrigated-grass while the record declares place generic, origin Vancouver and source breuer2003, which db/sources.yml titles "Plant parameter values for models in Temperate climates". The declared fields are what this review rests on and they fit the slot; whether the path should carry a different place and source key belongs to that record's own evidence review.
Representativenesscuration required
The composite declares representativeness city. Four components are city, six are generic, the Swindon water-storage record is site-scoped and the OHM component carries no class. The site result is narrower than the city typology and needs composition-level adjudication. The generic conductance is also worth noticing: the irrigated sibling takes a city-classed Vancouver record in that slot while this entry takes a generic-classed one, so the two halves of the irrigated and unirrigated pair rest on different representativeness classes.
Slot and season mappingsupported
An assembly of twelve existing records into the twelve slots the vegetation archetypes use, and assembled is the method a composition sidecar takes. The composite produces no value of its own.
Completeness and uniquenesssupported
The uses block fills all twelve slots the vegetation archetypes use, namely albedo, emissivity, water_storage, leaf_area_index, leaf_growth_power, drainage, max_vegetation_conductance, porosity, biogen_co2, snow_lim_patch, vegetation_growth and ohm, which is the slot vocabulary every land_cover.grass, land_cover.dectr and land_cover.evetr archetype in the database uses, so no slot is missing. The ohm slot names one record in all four positions. archetypes/surfaces/grass/helsinki-finland--irrigated-grass-jarvi-et-al-2014 takes the same ten components and differs in exactly the two slots that should differ, drainage and max_vegetation_conductance, taking records/surfaces/grass/helsinki--jarvi2014--drainage--grass-irrigated ("Grass, irrigated") and records/surfaces/grass/vancouver--jarvi2011--max-conductance ("Irrigated Grass"). The pair is a deliberate irrigated and unirrigated split, not a duplication.

Scientific note

The assembly is coherent as an unirrigated Helsinki grass surface, and the unirrigated qualifier is carried by the drainage and conductance components; the Vargo albedo component is an irrigation-neutral grassland class. Four of twelve components declare place helsinki; snowpack limit and drainage are generic literature inputs, while water storage is a site-scoped Swindon import. Three matters remain: the Swindon selection needs a Helsinki composition rationale; the conductance component's path reads vancouver--jarvi2011 while the record declares place generic and source breuer2003, which its own evidence review must settle, and it is classed generic where the irrigated sibling's conductance is classed city. What a maintainer has to settle here is the ohm slot. All four season and wetness positions take records/ohm/generic--unreferenced--all-vegetation--vegetation-average-200-this-is-the-average-of-codes-20-30-50-51-52-53-60-i-e-includes-soil-and-water, a set the record itself describes as an average that includes soil and water, while five of the nine grass composites take the grass-specific "Short grass [30]" set instead. Only this entry and its irrigated sibling take the average. Changing it would change a model input, so the decision is a maintainer's and should be taken for both entries at once.

Model-ready fragment

Paste under land_cover.grass in a SUEWS YAML configuration; every value carries its citation.

alb_min:
  value: 0.19
  ref:
    ID: vargo2013
    DOI: 10.1016/j.jenvman.2012.10.007
    desc: generic, generic
alb_max:
  value: 0.19
  ref:
    ID: vargo2013
    DOI: 10.1016/j.jenvman.2012.10.007
    desc: generic, generic
emis:
  value: 0.93
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic
storage_drain_params:
  store_min:
    value: 1.9
    ref:
      ID: ward2018
      DOI: 10.1002/joc.5200
      desc: swindon, site
  store_max:
    value: 1.9
    ref:
      ID: ward2018
      DOI: 10.1002/joc.5200
      desc: swindon, site
  drain_eq:
    value: 2
    ref:
      ID: umep-dev2020a-docs
      DOI: null
      desc: generic, generic
  drain_coef_1:
    value: 0.013
    ref:
      ID: jarvi2011
      DOI: 10.1016/j.jhydrol.2011.10.001
      desc: generic, generic
  drain_coef_2:
    value: 1.71
    ref:
      ID: jarvi2011
      DOI: 10.1016/j.jhydrol.2011.10.001
      desc: generic, generic
lai:
  lai_type:
    value: 1
    ref:
      ID: havu-m2024-data
      DOI: 10.5281/zenodo.10572180
      desc: helsinki, city
  lai_min:
    value: 1.6
    ref:
      ID: havu-m2024-data
      DOI: 10.5281/zenodo.10572180
      desc: helsinki, city
  lai_max:
    value: 5.9
    ref:
      ID: havu-m2024-data
      DOI: 10.5281/zenodo.10572180
      desc: helsinki, city
  lai_power:
    growth_lai:
      value: 0.04
      ref:
        ID: havu-m2024-data
        DOI: 10.5281/zenodo.10572180
        desc: helsinki, city
    growth_gdd:
      value: 0.002
      ref:
        ID: havu-m2024-data
        DOI: 10.5281/zenodo.10572180
        desc: helsinki, city
    senescence_lai:
      value: -1.5
      ref:
        ID: havu-m2024-data
        DOI: 10.5281/zenodo.10572180
        desc: helsinki, city
    senescence_sdd:
      value: 0.0005
      ref:
        ID: havu-m2024-data
        DOI: 10.5281/zenodo.10572180
        desc: helsinki, city
  base_temperature:
    value: 5
    ref:
      ID: jarvi2014
      DOI: 10.5194/gmd-7-1691-2014
      desc: helsinki, city
  base_temperature_senescence:
    value: 10
    ref:
      ID: jarvi2014
      DOI: 10.5194/gmd-7-1691-2014
      desc: helsinki, city
  gdd_full:
    value: 300
    ref:
      ID: jarvi2014
      DOI: 10.5194/gmd-7-1691-2014
      desc: helsinki, city
  sdd_full:
    value: -450
    ref:
      ID: jarvi2014
      DOI: 10.5194/gmd-7-1691-2014
      desc: helsinki, city
wet_threshold:
  value: 1.9
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic
max_conductance:
  value: 33.1
  ref:
    ID: breuer2003
    DOI: 10.1016/S0304-3800(03)00274-6
    desc: generic, generic
alpha_bio_co2:
  value: 0.031
  ref:
    ID: bellucco2017
    DOI: 10.1016/j.agrformet.2016.12.011
    desc: helsinki, site
beta_bio_co2:
  value: 5.312
  ref:
    ID: havu-m2024-data
    DOI: 10.5281/zenodo.10572180
    desc: helsinki, site
theta_bio_co2:
  value: 0.723
  ref:
    ID: bellucco2017
    DOI: 10.1016/j.agrformet.2016.12.011
    desc: helsinki, site
resp_a:
  value: 1.2
  ref:
    ID: havu-m2024
    DOI: 10.1016/j.ufug.2024.128261
    desc: helsinki, site
resp_b:
  value: 0.09
  ref:
    ID: havu-m2024
    DOI: 10.1016/j.ufug.2024.128261
    desc: helsinki, site
min_res_bioco2:
  value: 0.6
  ref:
    ID: jarvi2019
    DOI: 10.1029/2018JD029576
    desc: finland, site
snowpack_limit:
  value: 190
  ref:
    ID: jarvi2014
    DOI: 10.5194/gmd-7-1691-2014
    desc: generic, generic, land_cover
ohm_coef:
  summer_wet:
    a1:
      value: 0.336
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a2:
      value: 0.313
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a3:
      value: -31.4
      ref:
        ID: unreferenced
        DOI: null
        desc: null
  summer_dry:
    a1:
      value: 0.336
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a2:
      value: 0.313
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a3:
      value: -31.4
      ref:
        ID: unreferenced
        DOI: null
        desc: null
  winter_wet:
    a1:
      value: 0.336
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a2:
      value: 0.313
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a3:
      value: -31.4
      ref:
        ID: unreferenced
        DOI: null
        desc: null
  winter_dry:
    a1:
      value: 0.336
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a2:
      value: 0.313
      ref:
        ID: unreferenced
        DOI: null
        desc: null
    a3:
      value: -31.4
      ref:
        ID: unreferenced
        DOI: null
        desc: null

Composition review

Curation requiredReview procedure

Composite metadata

Scopecity
Targetland_cover.grass · docs
Origin“Helsinki, Finland” (verbatim legacy string)
Schema2026.5 · legacy row 24240006
Report an issue