ORCHIDEE MICT-LEAK (r5459), a global model for the production, transport, and transformation of dissolved organic carbon from Arctic permafrost regions - Part 1: Rationale, model description, and simulation protocol
ORCHIDEE MICT-LEAK (r5459), a global model for the production, transport, and transformation of dissolved organic carbon from Arctic permafrost regions - Part 1: Rationale, model description, and simulation protocol
复制标题
DOI：
10.5194/gmd-12-3503-2019
复制
发表时间：
2019-08-12
影响因子：
5.1
通讯作者：
Ciais, Philippe
中科院分区：
文献类型：
--
作者：
Bowring, Simon P. K.;Lauerwald, Ronny;Ciais, Philippe
很少有地球系统模型充分代表了独特的冻土土壤地球化学及其各自的过程，这大大有助于不确定性，估计他们的反应，以及整个地球，变暖。同样地，在地球系统模型中，被称为“无限碳循环”的河流成分很少被认识到。水文动员的有机材料从一个类似的1330-1580 PgC碳储量的河流网络的结果，无论是沉积沉降或大气“逃避”，过程普遍预计将增加与放大北极气候变暖。在这里，生产，运输和大气中释放的溶解有机碳（DOC）从高纬度永久冻土到内陆沃茨和海洋中明确表示的第一次在陆地表面组件（ORCHIDEE）的CMIP 6全球气候模式（研究所皮埃尔西蒙拉普拉斯- IPSL）。该模型，ORCHIDEE MICT-LEAK，它代表了先前描述的ORCHIDEE版本MICT和LEAK的合并，机械地表示（a）植被和土壤物理过程的高纬度雪，冰，土壤现象和（B）DOC和CO2的循环，包括大气逃逸，沿着陆地-水生连续体从土壤通过河流网络到海岸在0.5至2度的分辨率。本文，第一次在一个两部分的研究，提出了包括这些过程中的高纬度特定的陆面模型的基本原理，然后描述了该模型的重点是新的过程实现，其次是模型配置和模拟协议的总结。这些模拟运行的结果，进行了勒拿河流域，对观测数据在本研究的第二部分进行了评估。
Few Earth system models adequately represent the unique permafrost soil biogeochemistry and its respective processes; this significantly contributes to uncertainty in estimating their responses, and that of the planet at large, to warming. Likewise, the riverine component of what is known as the "boundless carbon cycle" is seldom recognised in Earth system modelling. The hydrological mobilisation of organic material from a similar to 1330-1580 PgC carbon stock to the river network results in either sedimentary settling or atmospheric "evasion", processes widely expected to increase with amplified Arctic climate warming. Here, the production, transport, and atmospheric release of dissolved organic carbon (DOC) from high-latitude permafrost soils into inland waters and the ocean are explicitly represented for the first time in the land surface component (ORCHIDEE) of a CMIP6 global climate model (Institut Pierre Simon Laplace - IPSL). The model, ORCHIDEE MICT-LEAK, which represents the merger of previously described ORCHIDEE versions MICT and LEAK, mechanistically represents (a) vegetation and soil physical processes for high-latitude snow, ice, and soil phenomena and (b) the cycling of DOC and CO2, including atmospheric evasion, along the terrestrial-aquatic continuum from soils through the river network to the coast at 0.5 to 2 degrees resolution. This paper, the first in a two-part study, presents the rationale for including these processes in a high-latitude-specific land surface model, then describes the model with a focus on novel process implementations, followed by a summary of the model configuration and simulation protocol. The results of these simulation runs, conducted for the Lena River basin, are evaluated against observational data in the second part of this study.