作為變化的重要議題、與氣候變化同步引起日益關注的氮沉降問題(在變化中與climate change相對應,又稱chemical change),與氣候變化一樣已日益成為變化研究的熱點問題。我國氮沉降研究一般采取離子交換樹脂法和降水采集法(盛文萍等,2010;王德宜等,2010;張國森等,2003),然后拿到實驗室進行分析,如張國森等(2003)在野外采集雨水后帶到實驗室分析硝態氮、亞硝態氮及氨氮濃度。相對于我國零散的大氣氮沉降研究,上對氮沉降的監測研究更加重視和系統化,如歐洲RECOVER:2010 項目(designed to assess the impact of current and future anthropogenic pressures on sensitive European freshwater ecosystems)對30個酸雨敏感區監測點的分析結果,氮沉降如果超過10kgNha-1yr-1的閾值,將導致河流氮飽和趨勢和硝態氮濃度的增高。歐洲WARMER(Water Risk Management in Europe)項目研究設計了微環流分析技術(Micro Loop Flow Analysis)以就地或原位持續監測陸地及水體氮素營養鹽的動態變化(Moscetta etc. 2009)。
4.Moscetta, P., L. Sanfilippo, E. Savino, etc. Instrumentation for continuous monitoring in marine environment. IEEE Oceans’09 conference. Biloxi(USA), 2009
5.Wright R. F., C. Alewell, J. Cullen, etc. Trends in nitrogen deposition and leaching in acid-sensitive streams in Europe. Recover:2010 project report, 2010