呼吸驱动的CO2脉冲主导澳大利亚通量的变异
摘要：澳大利亚大陆对全球陆地二氧化碳（CO2）吸收的年际变化做出了重要贡献。然而，偏远地区缺乏现场观测数据，使得无法解析导致CO2通量变异的过程。本文通过对2009-2018年间卫星观测的大气CO2测量进行分析，发现澳大利亚大陆经常出现干季末期的CO2脉冲。由于季节性变化相比之前的自上而下推断和自下而上估计要高2-3倍，这些脉冲在很大程度上控制着澳大利亚的CO2平衡的年际变化。CO2脉冲出现在降雨开始后不久，是由于澳大利亚半干旱地区光合作用吸收前土壤呼吸增强所驱动的。土壤重湿过程的建议性大陆尺度相关性对于我们对全球气候 - 碳循环反馈的理解和模拟具有重大影响。
作者：Eva-Marie Metz (1), Sanam N. Vardag (1 and 2), Sourish Basu (3 and 4), Martin Jung (5), Bernhard Ahrens (5), Tarek El-Madany (5), Stephen Sitch (6), Vivek K. Arora (7), Peter R. Briggs (8), Pierre Friedlingstein (9 and 10), Daniel S. Goll (11), Atul K. Jain (12), Etsushi Kato (13), Danica Lombardozzi (14), Julia E.M.S. Nabel (5 and 15), Benjamin Poulter (16), Roland S''ef''erian (17), Hanqin Tian (18), Andrew Wiltshire (19), Wenping Yuan (20), Xu Yue (21), S"onke Zaehle (5), Nicholas M. Deutscher (22), David W.T. Griffith (22) and Andr''e Butz (1 and 2 and 23) ((1) Institute of Environmental Physics, Heidelberg University, Germany, (2) Heidelberg Center for the Environment (HCE), Heidelberg University, Germany, (3) Goddard Space Flight Center, NASA, Maryland, USA, (4) Earth System Science Interdisciplinary Center, University of Maryland, Maryland, USA, (5) Max Planck Institute for Biogeochemistry, Jena, Germany, (6) College of Life and Environmental Sciences, University of Exeter, Devon, UK, (7) Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, Canada, (8) Climate Science Centre, CSIRO Oceans and Atmosphere, Canberra, Australia, (9) College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom, (10) Laboratoire de M''et''eorologie Dynamique, Institut Pierre-Simon Laplace, CNRS-ENS-UPMC-X, Paris, France, (11) Universit''e Paris Saclay, CEA-CNRS-UVSQ, LSCE/IPSL, France, (12) Department of Atmospheric Sciences, University of Illinois, Urbana, USA, (13) Institute of Applied Energy, Tokyo, Japan, (14) Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, USA, (15) Max Planck Institute for Meteorology, Hamburg, Germany, (16) Biospheric Sciences Laboratory, Goddard Space Flight Center, NASA, Maryland, USA, (17) CNRM, Universit''e de Toulouse, M''et''eo-France, CNRS, Toulouse, France, (18) International Center for Climate and Global Change Research, School of Forestry and Wildlife Sciences, Auburn University, USA, (19) Met Office Hadley Centre, Exeter, UK, (20) School of Atmospheric Sciences, Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, China, (21) School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China, (22) Centre for Atmospheric Chemistry, School of Chemistry, University of Wollongong, Wollongong, Australia, (23) Interdisciplinary Center for Scientific Computing, Heidelberg University, Germany)
论文ID：2207.06869
分类：Atmospheric and Oceanic Physics
分类简称：physics.ao-ph
提交时间：2023-05-03