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# A global atmospheric methane record from a tropical ice core

## Details

**Authors** Lamantia et al.

**Year** 2026

**Publisher** Nature

**Discipline** Climatology

**Secondary disciplines** Geology

[Read it at the publisher](https://doi.org/10.1038/s41586-026-10938-1) 
10.1038/s41586-026-10938-1

## In authors' words

### What they found (results)

A 2,000-year ice core from Nevado Huascarán (Peru) yielded the first tropical atmospheric methane record, running higher than but broadly tracking polar ice-core records, with isotopic signatures pointing to tropical wetlands (Amazon, Asia) as the dominant pre-industrial source that polar-only records had underestimated.

## Commentary

### In short

The same global methane signal reads differently depending on where on Earth it is sampled (Pvp); reconciling a tropical vantage point with the polar record required recognizing tropical wetlands as a distinct (D) , previously underweighted part (S) of the global source budget.

**Patterns it shows** D, S, P

**Added** 2026-08-22

**How to cite this** Lamantia et al. (2026). A global atmospheric methane record from a tropical ice core. Nature.