Atmospheric Sulfur and Nitrogen Deposition in Five Nature Reserves of Sichuan Basin to Qinghai-Tibetan Plateau Transect Region,Southwest-ern China  

作　　者：XU Zhongjun SHU Xi YANG Han FU Liqiang LIU Tingting XIA Zhonglin QIAO Xue TANG Ya 

机构地区：[1]Institute of New Energy and Low-carbon Technology,Sichuan University,Chengdu 610065,China [2]State Key Laboratory of Hy-draulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China [3]Siguniang Mountains Administration Bureau,Aba 624200,China [4]Mabian Dafengding Administration Bureau,Leshan 614600,China [5]National Forest Ecosystem Observation and Research Station,Mount Emei Scenic Area Management Committee,Leshan 614202,China [6]College of Architecture and Environment,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Geographical Science》2024年第6期1060-1072,共13页中国地理科学（英文版）

基　　金：Under the auspices of National Natural Science Foundation of China(No.41929002);Science and Technology Department of Sichuan Province(No.2021YFS0338)。

摘　　要：Enhanced sulfur and nitrogen deposition has been observed in many transect regions worldwide,from urban/agricultural areas to mountains.The Sichuan Basin(SCB),with 18 prefectural cities,is the most economically-developed region in western China,while the rural Qinghai-Tibetan Plateau(QTP)lies west of the SCB.Previous regional and national atmospheric modeling studies have sug-gested that large areas in the SCB-to-QTP transect region experience excessive deposition of sulfur and nitrogen.In this study,we applied a passive monitoring method at 11 sites(one in urban Chengdu and 10 from fivenature reserves)in this transect region from September 2021 to October 2022 to confirm the high sulfur and nitrogen deposition fluxes and to understand the gaps between the modeling and observation results for this transect region.These observations suggest that the five reserves are under eutrophication risk,and only two reserves are partially under acidification risk.Owing to the complex topography and landscapes,both sulfur and nitrogen deposition and critical loads exhibit large spatial variations within a reserve,such as Mount Emei.Regional atmospheric modeling may not accurately capture the spatial variations in deposition fluxes within a reserve;however,it can capture general spatial patterns over the entire transect.This study demonstrates that a combination of state-of-the-art atmospheric chemical models and low-cost monitoring methods is helpful for ecological risk assessments at a regional scale.

关 键 词：acid deposition ion exchange resin critical load ACIDIFICATION EUTROPHICATION Sichuan Basin to Qinghai-Tibetan Plateau transect region China 

分 类 号：X36[环境科学与工程—环境工程] X16[天文地球—大气物理学与大气环境] P402[天文地球—大气科学及气象学]