Supplementary material to "Estimation of Canada’s methane emissions: inverse modelling analysis using the ECCC measurement network"
Notice bibliographique
Résumé
Alert (ALT, 82.5˚ N, 62.5˚ W), Nunavut, has been referred to as an Arctic background site, being located thousands of kilometres from major source regions.The Alert observatory is ~6 km away from the military base camp.The lack of local source surrounding the site results in no significant diurnal variation in observed atmospheric CH4 concentrations all year around.In the winter, under weak vertical mixing, well-defined synoptic variations are observed due to inter-continental scale transport along with mainly anthropogenic CH4 originating from the Eurasia continent (Worthy et al., 2009).The measurements at Alert can represent the large-scale background conditions like long-term trend and mean seasonal cycle in the Arctic (Worthy et al., 2009).Behchoko (BCK, 62.8˚ N, 115.9˚W), Northwest Territories, is located on the northwest tip of Great Slave Lake.The continuous measurement was started in October 2012.The air sampling intake is at the top of a 60 m communication tower in a local power generation station: 10 km away from the town of Behchoko, a community ~80 km northwest of Yellowknife, the capital of Northwest Territories.Mixed forests, lakes and ponds surround BCK.Chibougamau (CHM, 49.7˚ N, 74.3˚ W) and Chapais (CPS, 49.8N, 75.0W),Quebec: CHM is surrounded by boreal forest and lakes, located 30 km south of the town of Chibougamau in central Quebec.CHM's continuous GHG measurement program started in August 2007 and was replaced with CPS in 2011.CPS is located ~45 km northwest of CHM, 10 km north of the town of Chapais.The air sampling was started at an 8 m tower and then moved to a 40 m tower in September 2014.Churchill (CHL, 58.7˚ N, 93.8 ˚ W), Manitoba, is located on the west coast of Hudson Bay.The GHG monitoring program began with flask air sampling in 2007 before the continuous measurement system started in October 2011.The sampling equipment is installed in the Churchill Northern Studies Research Facility, ~23 km east of Churchill.CHL is situated with Arctic tundra to the north and in the northern perimeter of the Hudson Bay Lowland, the largest boreal wetland in North America.Downsview (DWS, 43.8˚ N, 79.5˚ W), Ontario, is located in the ECCC GHG laboratory.DWS is in the suburbs of Toronto, ~15 km north of the downtown, surrounded by a mixture of residential and industrial areas with the adjacent green space in the south.The air sampling intake is installed 20 m above ground, on the top of the laboratory building.Continuous measurement has been steadily operated since 2012.East Trout Lake (ETL, 54.4˚ N, 105˚ W), Saskatchewan, is located near the southern edge of the boreal forest, ~140 km north of the closest town, Prince Albert.ETL started in 2005 as a replacement for Candle Lake (CDL), south of 50 km of ETL.CDL began in 2002 as a part of the Boreal Ecosystem Research and Monitoring Site (BERMS) and Fluxnet Canada research program.The air sampling intake is installed on a 105 m communication tower.Egbert (EGB, 44.2˚ N, 79.8˚ W), Ontario, is ~100 km north of Toronto, on the campus of the Centre for Atmospheric Research Experiments (CARE), a laboratory of ECCC.As a regionally representative site, EGB provides the infrastructure for long-term atmospheric observations of air quality, tropospheric ozone, and greenhouse gases.The GHG measurement started in March 2005.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,011 |
| Méta-épidémiologie (sens strict) | 0,002 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,002 | 0,004 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,002 | 0,001 |
| Science ouverte | 0,003 | 0,001 |
| Intégrité de la recherche | 0,002 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,680 | 0,184 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».