A Method Estimating Dry Deposition for Assessment of Nitrogen Load on Forests in East Asia
A Method Estimating Dry Deposition for Assessment of Nitrogen Load on Forests in East Asia
复制标题
东亚森林氮负荷的干沉降估算方法
DOI：
10.1007/s11270-022-05874-5
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Ohizumi Tsuyoshi
中科院分区：
文献类型：
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作者：
Ban Satomi;Matsuda Kazuhide;Ohizumi Tsuyoshi
我们与东亚酸沉降监测网(EANET)合作，开发了一种合理估计氮干沉降量(HNO_3、NH_3、颗粒物NO_3−和p-NH_4+)的方法，用于评估东亚森林的氮负荷。虽然通常需要每小时的气象数据来计算干沉积速度，但实际上EANET站点只发布了每月的气象数据。因此，我们发展了基于公开的月度气象资料计算沉积速度的方法。在考虑月数据时，特别考虑了一个月内地表湿润周期的计算，这对氮组分的沉积速度有很大的影响。该方法基于每小时的气象数据，准确地重建了计算的沉积速度。2019年在东亚7个国家的22个地点进行了一项关于计算总(干和湿)氮沉降量的案例研究。在日本和东南亚的许多地点，总氮沉降量超过了1000万公斤/公顷−1年−1。在东亚中纬度和东南部地区，氮负荷对森林生态系统的风险肯定很高。
We developed a method reasonably estimating nitrogen dry deposition (HNO3, NH3, and particulate NO3−and p-NH4+), for assessing nitrogen load on forests in East Asia, in cooperation with the Acid Deposition Monitoring Network in East Asia (EANET). Although hourly meteorological data for the dry deposition velocity calculation is commonly requested, only monthly meteorological data has been released in virtually EANET sites. As a result, we developed the method calculating the deposition velocities based on publicly available monthly meteorological data. When considering monthly data, the calculation of the surface wetness period in a month, which has a large impact on the deposition velocities of nitrogen components, was especially considered. The developed method accurately recreated the calculated deposition velocities based on hourly meteorological data. A case study on calculating total (dry and wet) nitrogen deposition was carried out in 2019 at 22 sites in 7 countries in East Asia. The total nitrogen deposition amounts exceeded 10 kg N ha−1year−1in many sites in Japan and Southeast Asian sites. The risks of nitrogen load on the forest ecosystems were certainly high in mid-latitude and southeast areas in East Asia.