Publications·December 30, 2020
The Data Report 2019 of the Acid Deposition Monitoring Network in East Asia (EANET) provides a comprehensive analysis of acid deposition and air concentration data collected across 13 participating countries. The report presents findings from five key environmental monitoring activities: wet deposition, dry deposition (air concentration), soil and vegetation, inland aquatic environments, and catchment-scale monitoring. It details methodologies, site classifications, and data management processes, ensuring the consistency and reliability of monitoring efforts. The results offer insights into regional air pollution trends, deposition rates, and ecosystem impacts, contributing to scientific understanding and policy-making on acid deposition. The report also includes statistical summaries, quality assurance measures, and historical data comparisons to track long-term environmental changes. This information serves as a valuable resource for researchers, policymakers, and stakeholders working towards mitigating acid deposition effects in East Asia.
The EANET Data Report 2019 presents acid deposition data and methods used across the region for calendar year 2019, compiled by the Network Center for EANET (issued December 2020) . It opens with an Introduction explaining EANET’s purpose—regional cooperation to build a common understanding of acid deposition conditions and to inform policy makers—and recalls the program’s evolution from the 1998–2000 preparatory phase into regular monitoring (from January 2001) with participation that has since expanded to 13 countries . The report contains five main technical chapters: Wet Deposition, Dry Deposition (Air Concentration), Soil & Vegetation, Inland Aquatic Environment, and Catchment-scale Monitoring, plus appendices and corrigenda .
In the Network Description, sites are classified into Urban, Rural, and Remote categories for acid deposition work, and Basic survey and Ecosystem analysis sites for ecological surveys. The section also clarifies siting purposes (e.g., urban effects on buildings/health, rural effects on crops/forests, and remote sites for background/long-range transport) . In 2019, 13 countries (Cambodia, China, Indonesia, Japan, Lao PDR, Malaysia, Mongolia, Myanmar, Philippines, Republic of Korea, Russia, Thailand, Viet Nam) operated 66 monitoring sites: 26 urban, 19 rural, and 21 remote .
The Wet Deposition chapter sets out methods for field and lab work, data management, and meteorological measurements, followed by statistics/definitions and site lists . The Dry Deposition (Air Concentration) chapter details both automatic and manual approaches: automatic monitoring targets priority species—SO₂, O₃, NO, NO₂, PM₁₀, PM₂.₅—with criteria and QA/QC referenced to the EANET Technical Manual; manual work uses filter pack and passive sampler methods to quantify gases (e.g., SO₂, HNO₃, HCl, NH₃) and particulate ions (SO₄²⁻, NO₃⁻, Cl⁻, NH₄⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺) with QA/QC procedures also specified in the manual . The report includes monitoring sites and parameters used for air concentration work in 2019 .
For Soil & Vegetation, Inland Aquatic Environment, and Catchment-scale chapters, the report provides method subsections (e.g., field operation, laboratory operation, data management/selection) and then site lists and results, indicating the multi-media scope of EANET’s ecosystem impact assessment .
Throughout, the dataset and documentation emphasize data submission by participating countries to the Network Center (by end-June each year) and the scientific review process (e.g., SAC20 review of the draft report), underscoring the regional data-sharing and QA/QC framework that underpins comparability and reliability of the results .
Key words highlighted: EANET, acid deposition, wet deposition, dry deposition (air concentration), automatic monitoring, manual monitoring, filter pack, passive sampler, SO₂, NO₂, O₃, PM₁₀, PM₂.₅, QA/QC, ion balance (R1), conductivity agreement (R2), Urban/Rural/Remote, long-range transport, soil and vegetation, inland aquatic environment, catchment-scale monitoring, data submission, SAC.