Evergreen trees · albedo · SUEWS parameter database

browse · records/surfaces/evetr/se-england--ward2016--albedo.yml

Evergreen trees · albedoevetr evidence record

alb_min0.1

alb_max0.1

albedo evetr generic generic Land-cover class Järvi 2011

Parameters

Names follow the SUEWS YAML specification; click one for its definition in the configuration reference.

`alb_min`	0.1
`alb_max`	0.1

Provenance evidence

Awaiting sign-off

Published value · assessed by provenance-audit · 2026-09-02. Agent assessment is evidence preparation, not human verification.

The Surface Urban Energy and Water Balance Scheme (SUEWS): Evaluation in Los Angeles and Vancouver.Parameter source

Where: Table 2(a), SUEWS parameters by surface type, p. 223

The Conif. Trees column publishes albedo alpha_i = 0.10. Footnote f cites Oke (1987) as the upstream literature source for the surface radiative properties.

Surface Urban Energy and Water Balance Scheme (SUEWS): Development and evaluation at two UK sitesLater compilation

Where: Table 2, original and adjusted albedo model inputs, p. 8

Shows evergreen-tree albedo as 0.10 in both the original and adjusted columns. Section 4.2.2 explains that evergreen seasonal variation was neglected because its cover was negligible at the two UK sites; Ward et al. did not derive or adjust this value.

Assessment findings

Name	supported The label identifies the published parameter class or model configuration.
Target	supported The source uses the parameter for the same SUEWS target represented by the record.
Values	supported Järvi et al. Table 2(a) publishes coniferous-tree albedo 0.10, and Ward et al. carry the same 0.10 minimum and maximum into their UK application without adjustment.
Source	supported Järvi et al. are the checked parameter publication for the exact coniferous-tree value. Ward et al. later reuse it unchanged in the UK configuration.
Place	supported Generic records a literature model default rather than a location-specific determination. The stable path and origin retain the later SE England application lineage.
Representativeness	supported The value is a general SUEWS coniferous-tree input reused unchanged at London and Swindon; neither paper presents it as a site, city or regional empirical determination.
Applicable Scale	supported Järvi et al. tabulate the value for the coniferous-tree land-cover class, so land_cover is the supported application scale.
Method	supported The database adopts the published land-cover parameter directly without performing a new measurement or fit.
Identity	supported The record preserves one migrated SE England application row while its evidence fields now describe the generic coniferous-tree value it actually reuses. Stable path, origin and legacy ID remain migration identity rather than evidence-scope claims.

Scientific note

Järvi et al. Table 2(a) publishes coniferous-tree albedo 0.10. Ward et al. later carry it unchanged as both minimum and maximum in the London and Swindon configuration; they do not adjust or independently evaluate an evergreen albedo. The record now describes this as a generic land-cover literature parameter while preserving its stable path, raw origin and legacy identity. Neither value changes.

Model-ready fragment

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

alb_min:
  value: 0.1
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic, land_cover
alb_max:
  value: 0.1
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic, land_cover