Monitoring of Atmospheric Gases

Trace gas data sets measured by Canadian and U.S. ground-based monitoring networks from 1982 to the present including non-methane hydrocarbons (NMHC), ozone (O3) and total gaseous mercury (TGM). Included are Canadian federal and provincial networks (past and present) and U.S. historical networks (for data not available elsewhere).

These data sets are associated with various networks that monitor a variety of trace and reactive gases.

Non-Methane Hydrocarbons were measured and monitored in a study at Egbert, Ontario at the Centre for Atmospheric Research and Experiments, CARE.

Ozone which comprises Ground Level Ozone or GLO3 which is predominantly measured by the Canadian Air and Precipitation Monitoring Network (CAPMoN) or as part of a targeted special study at a specific site and Stratospheric ozone and ultraviolet radiation which is measured by the Canadian Brewer Spectrophotometer Network (CBSN) and vertical profiles of stratospheric ozone are measured and monitored by the Canadian Ozonesonde Network.

Total Gaseous Mercury (TGM) is measured by several networks and studies such as: the Canadian Mercury Monitoring Network, CAMNET (which is no longer in operation), Canadian Air and Precipitation Monitoring Network, CAPMoN; Environment and Climate Change Canada-Pacific and Northern Region, PNR, ECCC; Environment and Climate Change Canada-Quebec Region, ECCC-QR; and Environment and Climate Change Canada-Air Quality Research Division, ECCC_AQRD.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 22:04 (UTC)
Created	April 17, 2026, 22:04 (UTC)
contact_person	{}
criticality_level	[]
data_dictionary	[]
geographic_scope	[]
open_canada_collection	primary
open_canada_date_published	2016-08-10 00:00:00
open_canada_keywords	{"fr": ["Air", "qualité de l’air", "surveillance atmosphérique", "gaz atmosphériques", "réseaux et études", "NAtChem", "RCEPA", "réseau de surveillance des gaz à effet de serre", "GGMN", "étude de l’ozone au mont Sutton", "étude de l’ozone à Alert", "Mercure gazeux total", "MGT", "ozone", "ozone au niveau du sol", "ozone troposphérique", "ozone stratosphérique", "colonne d’ozone total", "profils verticaux", "spectrophotomètre Brewer", "sonde d’ozone", "gaz à effet de serre", "GES", "monoxyde de carbone", "CO", "dioxyde de carbone", "CO2", "méthane", "CH4", "hydrocarbures non méthaniques", "HCNM"], "en": ["Air", "Air Quality", "Atmospheric Monitoring", "NAtChem", "Networks and Studies", "CAPMoN", "Pacific and Northern Region", "PNR", "Atmospheric Gases", "Total Gaseous Mercury", "TGM", "ozone", "ground level ozone", "tropospheric ozone", "stratospheric ozone", "total column ozone", "vertical profiles", "Brewer spectrophotometer", "ozonesonde", "greenhouse gases", "GHG", "carbon monoxide", "CO", "carbon dioxide", "CO2", "methane", "CH4", "NonMethane Hydrocarbons", "NMHC", "Egbert", "Mount Sutton", "Alert"]}
open_canada_subject	["nature_and_environment"]
sensitivity_level	unrestricted
title_fr	Surveillance des gaz atmosphériques
update_frequency	as_needed