1. Background

Reactive nitrogen (Nr), including ammonia (NH3) and nitrogen oxides (NOx), has been produced by anthropogenic activities. Release of Nr to the environment is thought to pose substantial threats to human and ecosystem health. Therefore, to achieve sustainable nitrogen utilization, it is necessary to reduce Nr loss to the environment (Hayashi et al. 2021, Environmental Pollution).

To tackle the above issue, the resolution “Sustainable Nitrogen Management (UNEA 5.2),” which was adopted at the Fifth Session of the United Nations Environment Assembly, encouraged countries to develop national action plans for sustainable nitrogen management and to accelerate actions to significantly reduce nitrogen waste globally by 2030 and beyond.

NOx from fuel/waste combustion are precursors of photochemical oxidants and PM2.5, with adverse effects on human health and terrestrial ecosystems. NH3 emitted into the atmosphere from agricultural activities also contributes to the formation of PM (e.g., NH4NO3, (NH4)2SO4). Excessive nitrogen input from the atmosphere has adverse effects on terrestrial ecosystems and inland waters, including acidification and eutrophication (Yamashita et al. 2022, Science of the Total Environment). Thus, the Nr problem is also an atmospheric environmental problem.

EANET has been monitoring atmospheric deposition of these Nr species, because they are also important as acid deposition. EANET has the potential to contribute to the understanding of nitrogen flows from the atmosphere to ecosystems and to the discussion on sustainable nitrogen management.

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2. Objectives

This seminar aims to foster a shared understanding of sustainable nitrogen management within the EANET community and to facilitate discussions on how EANET data can contribute to addressing global nitrogen challenges, as well as identifying which aspects of EANET’s monitoring activities should be prioritized to support this goal.

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3. Concept Note, Agenda, and Speakers

Download the concept note and program here.

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For further inquiries, contact the Network Center for the EANET