地理学报 ›› 2016, Vol. 71 ›› Issue (11): 1926-1938.doi: 10.11821/dlxb201611005

• 生态与环境 • 上一篇    下一篇

中国喀斯特关键带岩石风化碳汇评估及其生态服务功能

宋贤威1,2(), 高扬2,3(), 温学发2, 郭大立2, 于贵瑞2, 何念鹏2, 张进忠1   

  1. 1. 西南大学资源环境学院,重庆 400716
    2. 中国科学院地理科学与资源研究所 中国科学院生态网络观测与模拟重点实验室,北京 100101
    3. 中国科学院大学,北京 100049
  • 收稿日期:2016-06-24 修回日期:2016-10-08 出版日期:2016-11-25 发布日期:2016-11-29
  • 作者简介:

    作者简介:宋贤威(1993-), 男, 硕士, 主要从事环境地球化学研究。E-mail: sxwkerry@163.com

  • 基金资助:
    国家自然科学基金重大国际合作项目(41571130043);中国科学院青年创新促进会;The NSFC-RCUK_NERC Major International Joint Research Project, No.41571130043;Youth Innovation Promotion Association, CAS

Rock-weathering-related carbon sinks and associated ecosystem service functions in the karst critical zone in China

Xianwei SONG1,2(), Yang GAO2,3(), Xuefa WEN2, Dali GUO2, Guirui YU2, Nianpeng HE2, Jinzhong ZHANG1   

  1. 1. College of Resources and Environment, Southwest University, Chongqing 400716, China
    2. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-06-24 Revised:2016-10-08 Online:2016-11-25 Published:2016-11-29

摘要:

喀斯特地区的岩石风化固碳被认为是全球遗漏碳汇之一,中国喀斯特地区的分布面积达344万km2,目前对其岩溶碳汇缺乏精确、系统的评估,对碳汇产生的机制仍存在争议。本文通过对喀斯特地区碳汇研究的回顾,详细介绍了适用于喀斯特地区固碳速率的估算方法,并对喀斯特地区的岩石风化碳汇进行再评估,然后将地球关键带科学概念引入喀斯特生态系统,阐述喀斯特关键带碳汇研究对生态系统服务和功能的意义。研究结果表明,中国喀斯特地区每年因岩溶作用产生的碳汇为4.74 Tg C yr-1,未来中国需要加强岩石—土壤—水体—生物—大气复杂交互系统的基础数据收集,以明确各界面碳通量,对喀斯特关键带碳汇进行多尺度、多方法、全方位联合评估,在改善喀斯特生态系统功能、科学管理区域和国家碳收支及全球变化研究等方面为政府和学者提供参考。

关键词: 喀斯特, 关键带, 碳汇, 固碳速率, 中国

Abstract:

The global karst area is about 2.2×107 km2, wherein China reaches up to 3.44×106 km2, occupying more than one third of the global karst area. The previous studies have showed that carbon (C) sequestration rate by chemical weathering in Chinese karst zone range from 5 Tg C yr-1 to 18 Tg C yr-1, which are considered as one of important "residual land sink" in global change research. In order to accurately estimate the C sequestration rate in karst area, we put forward the concept of Earth Critical Zone (CZ) for karst ecological system. In this study, we comprehensively understand the C cycle in karst CZ, introduce the estimation of the methods on karst CZ, and then re-evaluate the C sequestration rate in the karst CZ. At last, we systematically discuss the uncertainty of the C sinks in karst CZ. The results show that the rock-weathering-related C sink rate in Chinese karst CZ is about 4.74 Tg C yr-1. In addition, we elaborate the significance of C sequestration to ecological system service in karst CZ, strive to to strengthen the C monitor at rock-soil-water-biological-atmosphere continuum level in the future, and then use different methods to estimate and evaluate C cycle at multi-scale in karst CZ.

Key words: karst, critical zone, carbon sink, carbon sequestration rate, China