Correlation Study of Tourist Respiration with Travertine Landscape Degradation in Jiuzhaigou

QIU Guoyu1,†, XIANG Jiao1, YAN Chunhua1, QIN Longjun1, MAO Peng1, XIONG Bowen1, LI Ruili1, TANG Ya2, DU Jie3, QIAO Xue2, SHEN Xiaoxue1, SHI Cong1, JIANG Xianchenghao1, CHEN Zhi1, SHI Zhe1, HUANG Ying1, DING Junjie1

1. School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055; 2. Department of Environment, College of Architecture and Environment, Sichuan University, Chengdu 610065; 3. Jiuzhaigou Administrative Bureau, Tibetan Qiang Autonomous Prefecture of Ngawa 623402; † E-mail: qiugy@pkusz.edu.cn

Abstract With the continuous increase of global CO2 emission, the CO2 emission of tourists leads to an increase rate of atmospheric CO2 around popular scenic spots which is much higher than global average. Based on the eddy covariance system, long-term monitoring of CO2 concentration was conducted in Rhino Lake, Shuzheng Village, Jiuzhaigou World Heritage. Combined with the annual runoff and the rate of travertine loss (CACO3) based on CO2 concentration, the annual amount of travertine loss in Jiuzhaigou World Heritage Site was estimated to explore the mechanism of travertine degradation. The research finds that the breath of tourists can increase the local atmospheric CO2 concentration by 250–300 ΜL/L, which can increase travertine loss rate by 18%–21%. Increase in CO2 caused by the breath of tourists is the main reason leading to the degradation and disappearance of the world heritage travertine. CO2 emission of tourists is indeed destroying the world heritage. Key words world heritage; CO2; tourist; travertine degradation

众所周知, 地球大气CO2的平均浓度已经超过400 ΜL/L[1]。在全球 CO2浓度持续升高的背景下,持续不断的游客数量增加会进一步升高热门景点周围的 CO2浓度, 由此引起的对世界遗产环境的负面

影响, 尤其是对其可持续性的不确定性影响, 引起广泛关注[2–3]。

世界自然遗产有漫长的历史(几万至几十万年),是地球历史的宝贵产物[4]。钙华是含碳酸氢钙的地

四川省科技计划(2021YFH0082)和“九寨沟世界自然遗产地植被演替与景观生态环境保护”项目(5132202020000046)资助收稿日期: 20210322; 修回日期: 20211215