# Open Access Accumulation Chambers SAGE (Surface-Air Gas Exchange)—DIY Philosophy

## TL;DR

The paper introduces an open-access, automatic closed-chamber system for measuring gas exchange between soil/water and the atmosphere at low cost.

## Contribution

A DIY, open-access, and cost-effective closed-chamber system for greenhouse gas flux monitoring is presented.

## Key findings

- The system allows for cost-effective deployment of dense chamber networks for gas exchange monitoring.
- The design supports both portable and automatic configurations for different measurement needs.
- Full documentation, including 3D/2D plans and parts lists, is provided for replication.

## Abstract

Soil and water gas exchanges with the atmosphere can be monitored using the closed-chamber technique. In this paper, we describe our open-access automatic closed chamber that can be operated on the soil and water surface with several options and configurations.

What are the main findings?
Design of an open-access, versatile, automatic closed-chamber system for soil and water gas exchange measurements.Fully autonomous chamber description.

Design of an open-access, versatile, automatic closed-chamber system for soil and water gas exchange measurements.

Fully autonomous chamber description.

What are the implications of the main findings?
Cost-effective deployment of dense closed-chamber networks.Improved accessibility of long-term greenhouse gas flux measurement.

Cost-effective deployment of dense closed-chamber networks.

Improved accessibility of long-term greenhouse gas flux measurement.

Gas exchange between soil or water surfaces and the atmosphere is one of the main sources of greenhouse gas production and absorption. Faced with global climate change and increasing atmospheric concentrations of these gases, significant scientific efforts are being made to monitor this exchange using various techniques, including closed-chambers. Although relatively simple, this technique requires careful attention to several key points. Furthermore, any installation using commercial chambers is relatively expensive. Indeed, given the specific variability of gas exchange, a single chamber cannot assess all the gas exchange in the soil of a given plot. Several chambers are therefore necessary, which increases the overall cost of the installation. In our laboratory, we have built different types of chambers: portable “nomad” ultra-low-cost chambers for punctual, large-area measurement campaigns and “automatic” cost-effective chambers for long-term installations. In this article, we aim to share our experience by describing our achievements and providing a link to the complete documentation, which includes 3D and 2D plans, Gerber files for manufacturing printed circuit boards, and a parts list.