Time series · co2-monthly

Monthly atmospheric CO2

Monthly mean atmospheric carbon dioxide at Mauna Loa Observatory (1958 to present) and the global marine-surface average (1979 to present), with the seasonal-cycle-removed trend.

Updates
Monthly
Coverage
—
Current version
—
Last published
—
Validation
—
License
US Government work
Commercial use
Allowed

Chart

Monthly atmospheric CO2

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Source: NOAA GML.
Show the data as a table

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Use the API

Each series and location is its own small file. The examples follow the series and location picked above. See the docs for versions, caching and errors.

curl

# One series for one place (.json or .csv)
curl -s "https://api.climatedata.dev/v1/co2-monthly/average/noaa-mlo.json"

# Every series and place in one file
curl -sO "https://api.climatedata.dev/v1/co2-monthly/download/co2-monthly.csv"

Python (polars)

import polars as pl

# One series for one place
df = pl.read_csv("https://api.climatedata.dev/v1/co2-monthly/average/noaa-mlo.csv")

# Every series and place, with series and location columns
everything = pl.read_parquet("https://api.climatedata.dev/v1/co2-monthly/download/co2-monthly.parquet")

JavaScript

const res = await fetch("https://api.climatedata.dev/v1/co2-monthly/average/noaa-mlo.json");
if (!res.ok) throw new Error((await res.json()).detail); // errors are problem+json
const { meta, data } = await res.json();
console.log(meta.location_name, data.at(-1)); // { date, value, ... }

Downloads

The whole dataset in one file, with series and location columns. Parquet keeps the column types and is much smaller.

Schema and series

Each series file has these columns. The bulk downloads add series and location columns in front.

Column Type Unit Can be empty Description
date month (YYYY-MM) — no —
value number ppm no —
uncertainty number ppm yes —
interpolated true / false — yes —

Series

Series id Name
average Monthly mean mole fraction
trend Monthly mean with the average seasonal cycle removed

Locations

Covers 2 places.

Location id Name
noaa-mlo Mauna Loa Observatory, Hawaii
world Global marine surface average

Source and license

Source
NOAA Global Monitoring Laboratory, Trends in Atmospheric Carbon Dioxide
Publisher
NOAA GML
License
US Government work (public domain in the United States) (LicenseRef-US-Government-Work)
Commercial use
Allowed

Credit the source with this exact text:

Lan, X., Tans, P. and K.W. Thoning: Trends in globally-averaged CO2 determined from NOAA Global Monitoring Laboratory measurements. NOAA GML (https://gml.noaa.gov/ccgg/trends/). Mauna Loa data from March 1958 to April 1974 obtained by C. David Keeling, Scripps Institution of Oceanography.

Checked every 1 day. If the source hasn't changed in 45 days, the status page flags it as stale.

Endpoints

Every URL for this dataset. To pin the current version, put it after the id: /v1/co2-monthly@<version>. The API reference describes each response.

What URL
Metadata: version, coverage, downloads, validation /v1/co2-monthly
Versions and monthly snapshots /v1/co2-monthly/versions
Series and locations /v1/co2-monthly/locations
Monthly mean mole fraction (JSON) /v1/co2-monthly/average/{location}.json
Monthly mean mole fraction (CSV) /v1/co2-monthly/average/{location}.csv
Monthly mean with the average seasonal cycle removed (JSON) /v1/co2-monthly/trend/{location}.json
Monthly mean with the average seasonal cycle removed (CSV) /v1/co2-monthly/trend/{location}.csv
Whole dataset (CSV) /v1/co2-monthly/download/co2-monthly.csv
Whole dataset (Parquet) /v1/co2-monthly/download/co2-monthly.parquet