1/8˚ resolution MOM6-COBALT daily physical and biogeochemical diagnostics for 2016
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The files in this dataset contain daily mean chlorophyll (µg/kg), pH, nitrate (mol/kg), dissolved oxygen (mol/kg), potential temperature (˚C) and salinity model outputs for 2016 for the region between 20-55˚N, 135-111˚W. Data was extracted from a global grid run with coupled ocean-ice model configured using the Modular Ocean Model 6 (MOM6, https://github.com/NOAA-GFDL/MOM6 ) and Sea Ice Simulator (SIS2) developed at the NOAA Geophysical Fluid Dynamics Laboratory (Adcroft et al., 2019). The horizontal resolution of the grid is 1/8˚, which is considered eddying and no eddy parameterization was included. Vertically, the model uses 75 hybrid vertical-sigma2 layer coordinates that is remapped onto 35 World Ocean Atlas/Coupled Model Intercomparison Project standard depth levels. The atmospheric forcing was derived from the Japanese 55-year Reanalysis version 1.5 (JRA55 1.5, https://jra.kishou.go.jp/JRA-55/index_en.html#jra-55). The model is driven by river freshwater runoff from a monthly climatology derived from Dai and Trenberth (2002) and Dai et al. (2009), which can be assessed at https://rda.ucar.edu/datasets/ds551.0/. A remapping scheme was used to add freshwater into the appropriate coastal grid cells near the river mouths. The biogeochemical model used was the Carbon, Ocean Biogeochemistry and Lower Trophics (COBALTv2, Stock et al., 2020), which uses 33 tracers for representation of coupled elemental cycles of carbon, nitrogen, phosphorus, iron, silicon, alkalinity, oxygen and lithogenic matter and associated plankton food web dynamics. More details about the model setup are described in Liu et al. (2019) and Liu et al. (2021). This work was part of a PMEL-led project "A Pilot BGC Argo Float Array in the California Current Large Marine Ecosystem" funded by NOAA Research. References: Adcroft, A., Anderson, W., Blanton, C., Bushuk, M., Dufour, C.O., Dunne, J.P., Griffies, S.M. et al. (2019). The GFDL Global Ocean and Sea Ice Model OM4.0: Model description and simulation features. Journal of Advances in Modeling Earth System, doi: 10.1029/2019MS001726 Dai, A., T. Qian, K. E. Trenberth, and J. D Milliman, 2009: Changes in continental freshwater discharge from 1948-2004. J. Climate, 22, 2773-2791 Dai, A., and K. E. Trenberth, 2002: Estimates of freshwater discharge from continents: Latitudinal and seasonal variations. J. Hydrometeorol., 3, 660-687 Liu, X., Dunne, J.P., Stock, C. A., Harrison, M.J., Adcroft, A., Resplandy, L. (2019). Simulating Water Residence Time in the Coastal Ocean: A Global Perspective. Geophysical Research Letters, 46, 22, 13910-13919. Doi:10.1029/2019GL085097 Liu, X., Stock, C.A., Dunne, J.P., Lee, M., Shevliakova, E., Malyshev, S., Milly, P.C.D (2021). Simulated Global Coastal Ecosystem Responses to a Half-Century Increase in River Nitrogen Loads. Stock, C. A., Dunne, J. P., Fan, S., Ginoux, P., John, J., Krasting, J. P., et al. (2020). Ocean biogeochemistry in GFDL's Earth System Model 4.1 and its response to increasing atmospheric CO<sub>2</sub>. <em>Journal of Advances in Modeling Earth Systems</em>, <em>12</em>, e2019MS002043. https://doi.org/10.1029/2019MS002043
本数据集包含2016年北纬20°至55°、西经111°至135°海域的逐日平均叶绿素（µg/kg）、pH、硝酸盐（mol/kg）、溶解氧（mol/kg）、位温（potential temperature，℃）及盐度的模式输出结果。 数据提取自耦合海冰模式的全球网格模拟结果，该耦合模式由美国国家海洋和大气管理局地球物理流体动力学实验室（NOAA Geophysical Fluid Dynamics Laboratory）开发的模块化海洋模式6（Modular Ocean Model 6，MOM6，https://github.com/NOAA-GFDL/MOM6）与海冰模拟器2（Sea Ice Simulator 2，SIS2）构建配置而成（Adcroft等，2019）。 该网格的水平分辨率为1/8°，可解析中尺度涡旋，未设置涡旋参数化方案。 垂直方向上，模式采用75层混合垂直σ2坐标，并将结果重映射至35层世界海洋图集（World Ocean Atlas）/耦合模式比较计划（Coupled Model Intercomparison Project）标准深度层。 模式的大气强迫场来自日本55年再分析资料第1.5版（Japanese 55-year Reanalysis version 1.5，JRA55 1.5，https://jra.kishou.go.jp/JRA-55/index_en.html#jra-55）。 模式的径流驱动数据采用基于Dai与Trenberth（2002）及Dai等（2009）的月尺度气候态河流淡水径流数据，该数据集可通过https://rda.ucar.edu/datasets/ds551.0/获取。 研究采用重映射方案，将淡水径流分配至河口附近的对应沿岸网格单元中。 本数据集采用的生物地球化学模式为碳-海洋生物地球化学与低营养级生物模式（Carbon, Ocean Biogeochemistry and Lower Trophics，COBALTv2，Stock等，2020），该模式通过33种示踪剂表征碳、氮、磷、铁、硅、碱度、溶解氧及陆源碎屑的耦合元素循环，以及相关的浮游生物食物网动力学过程。 关于模式配置的更多细节可参见Liu等（2019）与Liu等（2021）的研究。 本研究是由美国国家海洋和大气管理局研究部（NOAA Research）资助、由太平洋海洋环境实验室（Pacific Marine Environmental Laboratory，PMEL）牵头的"A Pilot BGC Argo Float Array in the California Current Large Marine Ecosystem"（加利福尼亚流大型海洋生态系统生物地球化学Argo浮标试点阵列）项目的一部分。 参考文献： 1. Adcroft, A., Anderson, W., Blanton, C., Bushuk, M., Dufour, C.O., Dunne, J.P., Griffies, S.M. 等（2019）. GFDL全球海洋与海冰模式OM4.0：模式描述与模拟特性. 《地球系统建模进展杂志》, doi: 10.1029/2019MS001726 2. Dai, A., Qian, T., Trenberth, K.E. & Milliman, J.D., 2009：1948-2004年全球大陆淡水径流变化. 《气候杂志》, 22, 2773-2791 3. Dai, A. & Trenberth, K.E., 2002：全球大陆淡水径流估算：纬度与季节变化特征. 《水文气象学杂志》, 3, 660-687 4. Liu, X., Dunne, J.P., Stock, C.A., Harrison, M.J., Adcroft, A., Resplandy, L.（2019）. 沿海海洋水体停留时间的全球模拟研究. 《地球物理研究通讯》, 46(22), 13910-13919. Doi:10.1029/2019GL085097 5. Liu, X., Stock, C.A., Dunne, J.P., Lee, M., Shevliakova, E., Malyshev, S., Milly, P.C.D（2021）. 半个世纪河流氮负荷增加下的全球沿海生态系统模拟响应 6. Stock, C.A., Dunne, J.P., Fan, S., Ginoux, P., John, J., Krasting, J.P. 等（2020）. GFDL地球系统模式4.1中的海洋生物地球化学过程及其对大气CO₂浓度升高的响应. 《地球系统建模进展杂志》, 12, e2019MS002043. https://doi.org/10.1029/2019MS002043
