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Greenhouse gas levels in Duaer

In Duaer: NOAA GML: monthly CO2 at Mauna Loa and global CO2, methane, and nitrous oxide, with the change on a year earlier. One successful search uses 1 credit.

What you get

Duaer Greenhouse gas levels reads the NOAA Global Monitoring Laboratory monthly series, newest month first, with the trend and the change on a year earlier.

Pick Duaer Data → Greenhouse gas levels in the node creator, or open the data market. Related: Climate projection, GB grid carbon intensity.

When to use it

Report the latest CO2 reading at Mauna Loa.
Chart the rise of methane over a year.

When not to use it

Future climate projections. Use Climate projection.
Grid carbon intensity. Use GB grid carbon intensity.

Search on the canvas

Open the node creator and pick Duaer Data → Greenhouse gas levels.
Fill Gas (co2, co2-global, ch4, or n2o).
Limit defaults to 10, max 20. Execute.

A search uses 1 credit only when it returns rows. No rows, wrong input, or an upstream failure uses 0.

Call the API

GET https://api.duaer.com/v1/data/greenhouse-gases?gas=co2
Authorization: Bearer <Duaer key>

The call skill below matches Copy skill in the Duaer data market, with parameters, examples, and result fields.

Call skill

Same text as Copy skill.

---
name: duaer-greenhouse-gases
description: >-
  Duaer Greenhouse gas levels. NOAA GML: monthly CO2 at Mauna Loa and global CO2, methane, and nitrous oxide, with the change on a year earlier.
  One successful search uses 1 Duaer credit.
---

# Duaer Greenhouse gas levels

Duaer Greenhouse gas levels reads the NOAA Global Monitoring Laboratory monthly series, newest month first, with the trend and the change on a year earlier.

## When to use

- Report the latest CO2 reading at Mauna Loa.
- Chart the rise of methane over a year.

## When not to use

- Future climate projections. Use https://skills.duaer.com/climate-projection.md.
- Grid carbon intensity. Use https://skills.duaer.com/grid-carbon.md.

## Call

`GET https://api.duaer.com/v1/data/greenhouse-gases?gas=co2`

Header: `Authorization: Bearer <Duaer key>`

Use an account key or a model API key.

Get a Duaer key: https://skills.duaer.com/keys.md

## Parameters

Provide `gas`.

- `gas` — `co2` (Mauna Loa), `co2-global`, `ch4`, or `n2o`. Default co2.
- `limit` — Optional. Rows to return, from 1 to 20. Default 10.

## Examples

- `GET https://api.duaer.com/v1/data/greenhouse-gases?gas=co2` — monthly CO2 at Mauna Loa.
- `GET https://api.duaer.com/v1/data/greenhouse-gases?gas=ch4` — global methane.

## Result

The response is `{ "items": [...] }`. Each item has `source`, `title`, `url`, and `summary`, plus:

- `gas`, `month` — series and YYYY-MM.
- `value`, `unit` — monthly mean, in ppm or ppb.
- `trend` — seasonally adjusted value.
- `changeOnYear` — change on the same month a year earlier.

Fields without a value are left out.

## Credits

A search that returns at least one row uses 1 credit.
An empty search, a search that finds nothing, or a failed search uses 0.
Wrong input returns 400 with a message and uses 0.
No remaining credits returns 402 and does not search.
A missing key returns 401.

## Related

- https://skills.duaer.com/climate-projection.md — Duaer Climate projection
- https://skills.duaer.com/grid-carbon.md — Duaer GB grid carbon intensity

Questions

How many credits does a Greenhouse gas levels search use in Duaer?

One credit when Duaer returns rows. A search with no rows or an error uses 0.

What is trend in Duaer Greenhouse gas levels?

The value with the seasonal cycle removed, better for long-term change.

In this section

Get started

Climate projection in Duaer

In Duaer: High-resolution CMIP6 climate model projections to 2050 for a place: mean temperature and yearly rainfall by year or decade. One successful search uses 1 credit.

Get started

GB grid carbon intensity in Duaer

In Duaer: National Grid ESO: carbon intensity of Great Britain electricity now or for the next 24 hours, by region and fuel mix. One successful search uses 1 credit.