Reviews and syntheses: Carbonyl sulfide as a multi-scale tracer for carbon and water cycles
Reviews and syntheses: Carbonyl sulfide as a multi-scale tracer for carbon and water cycles
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DOI：
10.5194/bg-15-3625-2018
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发表时间：
2017-10
期刊：
影响因子：
4.9
通讯作者：
M. Whelan;S. Lennartz;T. Gimeno;R. Wehr;G. Wohlfahrt;Yuting Wang;Linda M. J. Kooijmans;T. Hilton-T.-Hilto
中科院分区：
文献类型：
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作者：
M. Whelan;S. Lennartz;T. Gimeno;R. Wehr;G. Wohlfahrt;Yuting Wang;Linda M. J. Kooijmans;T. Hilton-T.-Hilto
抽象的。在过去的十年中，人们对羰基硫（OCS 或 COS）的观察结果进行了研究，将其作为植物吸收碳的指标。 OCS 会被光合作用过程中与 CO2 相互作用的酶破坏，即碳酸酐酶 (CA) 和 RuBisCO，其中 CA 是更重要的一种。大气中 OCS 的大部分来源在地理上与这个大型植物汇是分开的，而二氧化碳的来源和汇位于生态系统中。因此，OCS 的减少可以与二氧化碳的吸收相关，而不会增加同等规模排放的复杂性。在这里，我们回顾了我们对全球 OCS 循环及其在生态系统碳循环科学中的应用的理解状况。 OCS 吸收与植物碳吸收密切相关，特别是在区域范围内。 OCS 可以与生态系统功能的其他独立测量结合使用，例如太阳诱导荧光以及碳和水同位素研究。需要做更多的工作来覆盖 OCS 观测的全球范围，并将这种强大的大气示踪剂与仍然存在碳和水循环基本问题的系统联系起来。
Abstract. For the past decade, observations of carbonyl sulfide (OCS or COS) have been investigated as a proxy for carbon uptake by plants. OCS is destroyed by enzymes that interact with CO2 during photosynthesis, namely carbonic anhydrase (CA) and RuBisCO, where CA is the more important one. The majority of sources of OCS to the atmosphere are geographically separated from this large plant sink, whereas the sources and sinks of CO2 are co-located in ecosystems. The drawdown of OCS can therefore be related to the uptake of CO2 without the added complication of co-located emissions comparable in magnitude. Here we review the state of our understanding of the global OCS cycle and its applications to ecosystem carbon cycle science. OCS uptake is correlated well to plant carbon uptake, especially at the regional scale. OCS can be used in conjunction with other independent measures of ecosystem function, like solar-induced fluorescence and carbon and water isotope studies. More work needs to be done to generate global coverage for OCS observations and to link this powerful atmospheric tracer to systems where fundamental questions concerning the carbon and water cycle remain.