自然资源学报 ›› 2021, Vol. 36 ›› Issue (7): 1873-1892.doi: 10.31497/zrzyxb.20210717

• 其他研究论文 • 上一篇    下一篇

中国生态脆弱区叶面积指数变化的主导气象因子研究

孙康慧1,2,3(), 曾晓东1,4,5(), 李芳1   

  1. 1.中国科学院大气物理研究所国际气候与环境科学中心,北京 100029
    2.江西省气象台,南昌 330096
    3.成都信息工程大学大气科学学院,成都 610225
    4.中国科学院大学,北京 100049
    5.南京信息工程大学气象灾害预报预警与评估协同创新中心,南京 210044
  • 收稿日期:2019-12-11 修回日期:2020-06-30 出版日期:2021-07-28 发布日期:2021-09-28
  • 通讯作者: 曾晓东(1969-),男,北京人,博士,研究员,研究方向为植被生态动力学模式、全球变化中的植被大气相互作用。E-mail: xdzeng@mail.iap.ac.cn
  • 作者简介:孙康慧(1994-),女,河南周口人,硕士,研究方向为气候变化与生态变化。E-mail: Skanghui@outlook.com
  • 基金资助:
    国家重点研发计划(2017YFA0604804);国家自然科学基金项目(41575109);国家自然科学基金项目(41475099)

Study on the dominant climatic driver affecting the changes of LAI of ecological fragile zones in China

SUN Kang-hui1,2,3(), ZENG Xiao-dong1,4,5(), LI Fang1   

  1. 1. International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, CAS, Beijing 100029, China
    2. Jiangxi Provincial Meteorological Observatory, Nanchang 330096, China
    3. School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China
    4. University of Chinese Academy of Sciences, Beijing 100049, China
    5. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2019-12-11 Revised:2020-06-30 Online:2021-07-28 Published:2021-09-28

摘要:

开展气候变化背景下中国生态脆弱区叶面积指数(LAI)变化的主导气象因子研究,对揭示该区陆地生态系统的变化规律和生态系统对气候变化的动态响应具有重要意义,并为生态恢复建设提供科学依据。基于CN0 5.1气象数据和全球陆表特征参量(GLASS)LAI产品,利用主成分分析方法研究了中国生态脆弱区1982—2017年LAI的变化特征及其主导气象因子。结果显示:1982—2017年,中国生态脆弱区气温基本呈上升趋势,而降水趋势的区域差异显著。大部分生态脆弱区LAI呈增长趋势,包括干旱半干旱、黄土高原、青藏高原和西南岩溶山地石漠化脆弱区大部,以及北方农牧林草脆弱区西部和东南部、南方农牧脆弱区北部和东南部。中国生态脆弱区LAI增长的主导气象因子是气温,其中生态脆弱区大部LAI增长的主导气象因子是日平均气温,而干旱半干旱脆弱区西部和南方农牧脆弱区LAI增长的主导气象因子分别是和日最低和最高气温。研究表明,在研究时段升温对我国生态脆弱区植被生长有积极影响,但在一些区域受湿度状况调制。

关键词: 叶面积指数, 主导气象因子, 气候变化, 生态脆弱区, 中国

Abstract:

Studying the dominant climatic driver affecting the changes of leaf area index (LAI) in China's ecological fragile zones under the background of climate change is of great significance in revealing the changes of land ecosystem and its dynamic response to climate change, as well as ecological restoration. Based on CN0 5.1 climatic data and Global Land Surface Satellite (GLASS) product of LAI, we study the changes of LAI and its dominant climatic driver in China's ecological fragile zones from 1982 to 2017, using Principal Component Analysis. Results show that temperature is on the rise in ecological fragile zones, while the regional difference of precipitation changes is significant. LAI showed an increasing trend from 1982 to 2017 in most of the ecological fragile zones, including arid and semi-arid region, Loess Plateau, Tibetan Plateau, and karst areas in Southwestern China, as well as the west and southeast of the farming, pasture, forest and grassland ecological fragile zone of Northern China and the north and southeast of the farming and pasture ecological fragile zone of Southern China. Temperature, especially daily average temperature, is the dominant climatic driver for LAI growth in most of the ecological fragile zones in China, while daily minimum and maximum temperature dominate the west of arid and semi-arid region and the south agriculture and pasture ecological fragile zone, respectively. This study emphasizes the positive impact of warming on vegetation growth in the present, however, it also depends on humidity condition.

Key words: leaf area index, climatic driver, climate change, ecological fragile zone, China