中国南方生态系统的酸沉降临界负荷

Critical loads of acid deposition for ecosystems in South China.

将中国南方生态系统的酸沉降敏感性等级与用ＭＡＧＩＣ模型在对应样点计算的临界负荷值相结合，对中国南方生态系统的酸沉降临界负荷进行了研究，并编制了１°×１°经纬度网格的临界负荷图．研究结果表明，中国南方生态系统硫沉降临界负荷大多在２．３～５．２ｇ／ｍ２ａ之间，在地域分布上由东南向西北逐渐增大，其中临界负荷小于３．０ｇ／ｍ２ａ的极敏感地区为浙江南部、广东与福建交界地区、贵州西南部和广西中部．

The critical loads of acid deposition for ecosystems in South China are studied by combining ecosystem sensitivity with site specific studies, which are done using MAGIC model. A critical load map of acid deposition for ecosystems in South China with a resolution of 1°×1° is produced. The result showed that the critical loads of sulfur for ecosystems in South China vary from 2.3～5.2 g/m 2a and increase from the southeast to the northwest on the whole. The four most sensitive areas where the critical loads are less than 3.0 g/m 2a are the south of Zhejiang Province, the areas between Fujian and Guangdong Provinces, the southwest part of Guizhou Province and the central part of Guangxi Zhuang Autonomous Region.