Suburban evapotranspiration estimates in Vancouver from energy balance measurements
Bibliographic record
Abstract
This study is concerned with the energy balance of a suburban area of south central Vancouver and in particular with the role of evapotranspiration in this balance. In the late summer - early fall of 1977 a measurement program was conducted to determine the energy balance components using the Bowen ratio - energy balance approach. The Bowen ratio was obtained from differential psychrometric measurements taken above mean roof-level. Net radiation was measured directly and the volumetric heat storage was parameterized in terms of net radiation. The results indicate that the Bowen ratio - energy balance approach is applicable to suburban environments. An error analysis developed for the reversing psychrometer system indicates that the errors in the turbulent fluxes were typically 10 - 20%. The turbulent latent heat flux was always a significant and often the dominant energy sink for this 'surface'. This is shown to be largely due to soil moisture replenishment by precipitation and irrigation (especially lawn sprinkling). The turbulent fluxes tended to be in-phase with net radiation during the day. This appears to be a result of the decreasing importance of non-radiative controls (especially the vapour pressure deficit) on evapotranspiration as the land use changes from rural to heavily urbanized. Sustained periods of positive turbulent fluxes were recorded at night, however the Bowen ratio was predominantly negative indicating that only one turbulent flux was positive. The data do not reveal any dependence on wind direction. The influence (if any) of the sea breeze could not be isolated. The equilibrium evapotranspiration rate often closely approximated the measured evapotranspiration.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".