Editing Ammonia production (mass)

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{| class="wikitable" style="float:right; clear:right; margin:0 0 1em 1em; width:320px;"
|+ SIGNAL Earth Structured Data
|-
! Object type
| Damage Signal
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! SIGNAL Earth ID
| DS-00066
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! Observable type
| Ammonia production (mass)
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! Unit
| t (metric tons of ammonia produced)
|-
! Temporal structure
| Periodic
|-
! Monitoring backbone
| —
|}
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{{SignalTerm|type=DS|id=DS-00066|label=Ammonia production (mass)}} refers to the total quantity of ammonia synthesized globally, measured in metric tons. Ammonia is a critical chemical primarily used in agriculture as a fertilizer, as well as in various industrial processes. The scale of ammonia production has significant environmental implications, including contributions to greenhouse gas emissions and impacts on nitrogen cycles. Understanding the magnitude and trends of ammonia production is essential for assessing its role as a human-driven environmental pressure within the global system. This signal captures ammonia production as a driver or stressor within the human domain, reflecting its influence on environmental quality and ecosystem processes.

== Geographic / System Context ==
Ammonia production occurs worldwide, with major industrial centers distributed across continents including Asia, Europe, North America, and others. The geographic distribution of production facilities is influenced by factors such as proximity to natural gas resources, energy availability, and agricultural demand. The global nature of ammonia production links diverse regions through supply chains and environmental impacts, making it a phenomenon of international environmental relevance. Production volumes vary regionally, reflecting differing agricultural practices and industrial capacities.

== Monitoring and Measurement ==
Monitoring ammonia production involves compiling data from industrial reporting, trade statistics, and energy use records. Agencies and organizations track production volumes periodically, often on an annual basis, using standardized measurement conventions expressed in metric tons. Life cycle assessments and environmental impact studies further analyze ammonia production's energy consumption and greenhouse gas emissions. While specific monitoring institutions are yet to be designated within the SIGNAL framework, existing industrial and environmental databases provide foundational data for this signal.

Within the SIGNAL system, ammonia production (mass) is treated as a defined environmental signal whose boundaries and measurement conventions are described below.

== Signal Definition ==
This signal quantifies the total mass of ammonia produced globally over defined time periods, expressed in metric tons (t). It represents the aggregate output of ammonia synthesis processes, including conventional industrial methods such as the Haber-Bosch process, as well as emerging renewable and by-product-based production pathways. The signal functions as a DRIVER condition within the human domain, indicating anthropogenic pressure on environmental systems through chemical production activities.

== Boundary Conditions ==
Boundary inclusions encompass all industrial and commercial ammonia production processes worldwide, regardless of feedstock or technology. This includes ammonia generated from fossil fuel-based methods, renewable resources, and industrial by-products. Boundary exclusions include ammonia present in natural biogeochemical cycles not directly attributable to human production activities, as well as ammonia emissions or environmental concentrations downstream of production. The signal focuses strictly on production mass rather than environmental dispersion or impact metrics.

== Aggregation Semantics ==
Geographically, ammonia production data are aggregated at global and regional scales to capture spatial distribution and trends. Temporally, the signal is aggregated periodically, typically on an annual basis, to reflect production cycles and reporting intervals. Cross-signal aggregation may consider ammonia production alongside related environmental signals such as greenhouse gas emissions or nitrogen deposition to assess combined environmental pressures. Aggregations aim to support comparative analysis and integrated assessment within the SIGNAL framework.

== Observational Status ==
Current monitoring of ammonia production relies on industrial reporting and life cycle assessment studies, with data availability varying by region and production method. The signal is periodically updated to reflect changes in production technology, feedstock sources, and market demand. Future SIGNAL releases may incorporate enhanced spatial resolution, integration with emissions data, and improved temporal granularity. The monitoring backbone and stressor classification for this signal remain to be fully established within the SIGNAL system.

== Related Signals ==
* None specified

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== Key Associated People ==
* '''Xinyu Liu''' (Argonne National Laboratory) [Lead author]
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== Sources ==
* [https://pubs.rsc.org/en/content/articlelanding/2020/gc/d0gc02301a Life cycle energy use and greenhouse gas emissions of ammonia production from renewable resources and industrial by-products — 2020]
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