全球碳循环研究中的δ
  <sup>13</sup>C方法及其进展

doi:10.11867/j.issn.1001-8166.2011.11.1225

随着分析技术的进步，δ¹³C观测在全球碳循环研究中越来越受到重视。在讨论关于碳循环中δ¹³C的Suess效应、分布特征和同位素分馏等基本概念的基础上，结合现有的观测事实，介绍应用δ¹³C辨别碳的源汇问题的方法，通过比较不同Keeling Plot方法分析该方法在研究大气CO₂背景特征中的意义。着重讨论δ¹³C在研究大气CO₂变化中的作用，以及在全球碳循环评估，尤其是利用观测的海水溶解无机碳的δ¹³C估算海洋吸收率研究中不同方法的特点及存在的问题，展望δ¹³C研究的发展趋势。

关键词: δ¹³C, 大气CO_2, 同位素分馏, 全球碳循环, 海洋吸收

With the development of analytical technique, δ¹³C observations have been paid more attentions in the study of global carbon cycle. Based on the discussion the fundamental concepts of δ¹³C in the global carbon cycle, such as δ¹³C Suess Effect, observed δ¹³C ranges of various carbon reservoirs and fractionation between them, this article introduces the analytical methods in applying δ¹³C to distinguish carbon source and sink by combining with current observational facts. The roles of δ¹³C in the study of seasonal and interannual variations of atmospheric CO₂ are discussed based on the facts that the δ¹³C from ocean is similar to that of atmosphere but that from terrestrial biosphere is much smaller than that of atmosphere. The various Keeling Plot approaches are introduced to show the achievements in analyzing the background characteristics of atmospheric CO₂ and its applicability is also discussed. The mass balance methods using observed atmospheric δ¹³C are analyzed to represent how to only use atmospheric δ¹³C data studying the missing carbon problems. The various δ¹³C inventory techniques in the assessment of global carbon cycle, particularly oceanic uptake rate, are analyzed to point out their features and shortages, and these techniques offer no model approaches to investigate the global carbon cycle. We stress that the uncertainties between inventory approaches are mainly from the observational errors, not from the techniques. Finally, the prospects of δ¹³C research in the global carbon cycle for both observational and theoretical fields are also discussed, especially the model based simulations. 

Key words: δ¹³C, Atmospheric CO₂, Isotopic fractionation, Global carbon cycle, Oceanic uptake

中图分类号:

X523

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摘要

δ 13C Methods and Its Progress in the Study of Global Carbon Cycle

δ ¹³C Methods and Its Progress in the Study of Global Carbon Cycle