Carbon Cycle Greenhouse Gases - NOAA Global Monitoring Laboratory

Carbon Cycle Greenhouse Gases - NOAA Global Monitoring Laboratory
An official website of the United States government
Here's how you know
Official websites use .gov
.gov
website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Global Monitoring Laboratory
Carbon Cycle Greenhouse Gases
The Carbon Cycle Greenhouse Gases (CCGG) research area operates the
Global Greenhouse Gas Reference Network
, measuring the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO
), methane (CH
), and nitrous oxide (N
O), as well as carbon monoxide (CO) which is an important indicator of air pollution.
CCGG is also active in the development of a global model called 'CarbonTracker', a
measurement and modeling system developed to keep track of sources (emissions to the atmosphere) and sinks (removal from the atmosphere) of carbon dioxide around the world. A version of CarbonTracker for methane (CH
) has also been developed, as well as CarbonTracker-Lagrange (CT-L), a regional inverse modeling framework designed for estimating North American greenhouse gas emissions and uptake fluxes.
Sites
Datasets
Data Viewer
News
Estimated Global Daily CO
April 22, 2026
427.59
ppm
Can we see a change in the CO
record because of COVID-19?
About
Reference Network Overview
Flask Sampling Network
In-Situ Measurements
Aircraft Measurements
AirCore Sampling System
Data
Data Summary
Trends in CO
, CH
, N
O, SF
Obs
ervation
Pack
age
MBL Reference
Products
CarbonTracker CO
CarbonTracker CH
CarbonTracker Lagrange
Greenhouse Gas Index
Information
Figures
Education and Outreach
How CO
is Measured
Isotope Measurements
WMO Standard Comparison