Agriculture — Manure Management Emissions
| Object type | Damage Signal |
|---|---|
| SIGNAL Earth ID | DS-00882 |
| Observable type | — |
| Unit | — |
| Temporal structure | — |
| Monitoring backbone | — |
Agriculture — Manure Management Emissions refer to the release of methane and other greenhouse gases from the handling, storage, and treatment of animal manure. These emissions are a significant component of agricultural greenhouse gas outputs and contribute to atmospheric methane concentrations, a potent climate forcing agent. Understanding and quantifying these emissions is essential for assessing agriculture's role in global greenhouse gas inventories and climate change mitigation efforts.
Manure management emissions arise from biological processes occurring under anaerobic conditions in manure storage systems such as lagoons, pits, and tanks. The magnitude of emissions depends on factors including animal type, manure handling practices, climate, and storage duration. These emissions are distinct from enteric fermentation emissions, which originate from digestive processes within ruminant animals.
Within the broader context of agricultural environmental impacts, manure management emissions provide insight into nutrient cycling, waste management practices, and their environmental consequences. They are monitored and modeled to inform scientific assessments and policy frameworks related to agricultural sustainability and climate change.
Geographic / System Context
[edit]Manure management emissions occur globally wherever livestock are raised and manure is collected and stored. The geographic distribution is influenced by livestock density, farming systems, and regional manure management practices. These emissions are not confined to a specific geographic boundary but are widespread across diverse agricultural landscapes, including intensive livestock production regions and mixed crop-livestock systems. Climate conditions such as temperature and precipitation also affect the rate of methane generation during manure storage.
Monitoring and Measurement
[edit]Monitoring of manure management emissions involves direct measurements using flux chambers, micrometeorological methods, and remote sensing techniques. Emission factors are often derived from field studies and laboratory incubations that simulate manure storage conditions. National and international agencies compile emission inventories based on activity data and emission factors, applying models to estimate emissions at regional and global scales. Scientific institutions employ atmospheric measurements and inverse modeling to validate emission estimates. The 2017 dataset on global manure nitrogen production and application provides gridded data that support Earth system modeling of these emissions.
Within the SIGNAL system, this phenomenon is treated as a defined environmental signal whose boundaries and measurement conventions are described below.
Signal Definition
[edit]Agriculture — Manure Management Emissions are defined as the methane emissions produced during the storage, treatment, and handling of animal manure before its application to land or disposal. This includes emissions from anaerobic decomposition processes occurring in manure storage facilities such as lagoons, pits, and tanks associated with livestock operations.
Boundary Conditions
[edit]Boundary inclusions encompass methane emissions generated from all forms of manure storage and treatment associated with agricultural livestock, including liquid and solid manure systems. Emissions from manure applied to soils or manure incorporated into soil are excluded, as these are accounted for separately under soil emissions. Enteric fermentation methane emissions from animal digestion are also excluded. Emissions from non-agricultural organic waste management systems are outside the scope of this signal.
Aggregation Semantics
[edit]Geographically, manure management emissions are aggregated based on livestock population distributions and manure management practices across regions and countries. Temporally, emissions are considered over annual and seasonal cycles to capture variations in storage duration and climatic influences. Cross-signal aggregation involves combining manure management emissions with other agricultural methane sources such as enteric fermentation and emissions from livestock to provide comprehensive agricultural greenhouse gas inventories. Aggregation notes emphasize the need for consistent spatial and temporal resolution to integrate with broader methane emission datasets.
Observational Status
[edit]Current monitoring of manure management emissions relies on a combination of direct measurements, emission factor-based inventories, and modeling approaches. Data availability varies regionally, with more comprehensive datasets in developed agricultural systems. The 2017 gridded global dataset on manure nitrogen production supports improved spatial resolution in emission estimates. Future SIGNAL releases may incorporate enhanced temporal resolution, expanded geographic coverage, and integration with related agricultural emission signals to refine understanding of manure management contributions to methane budgets.
Related Signals
[edit]- Anthropogenic methane emissions
- Anthropogenic nitrous oxide emissions
- Agriculture — Emissions from livestock Emissions
- Agriculture — Enteric Fermentation Emissions
Key Associated People
[edit]- Bowen Zhang — Auburn University [Source author; High]
- Yong Hou — Wageningen University [Source author; High]
Inclusion reflects material contribution to the scientific understanding of this damage signal; it does not imply review, endorsement, or affiliation with SIGNAL Earth.
Sources
[edit]- Global manure nitrogen production and application in cropland during 1860–2014: a 5 arcmin gridded global dataset for Earth system modeling — 2017. [Dataset; Anchor; High]
- Mitigation of ammonia, nitrous oxide and methane emissions from manure management chains: a meta-analysis and integrated assessment — Global Change Biology, 2015. DOI: 10.1111/gcb.12767. [Paper; Supporting; High]
- Methane and nitrous oxide emissions from animal manure management, 1990-2003 — PBL Netherlands Environmental Assessment Agency, 2006. [Report; Supporting; Medium]