1/8˚ resolution MOM6-COBALT daily physical and biogeochemical diagnostics for 2008

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 2008 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 CO2. Journal of Advances in Modeling Earth Systems, 12, e2019MS002043. https://doi.org/10.1029/2019MS002043

本数据集包含2008年北纬20°至55°、西经111°至135°海域的逐日平均模型输出数据，涵盖叶绿素（µg/kg）、pH值、硝酸盐（mol/kg）、溶解氧（mol/kg）、位温（˚C）及盐度等参数。
该数据集的数据源自美国国家海洋和大气管理局（NOAA）地球物理流体动力学实验室开发的耦合海冰模式，其采用模块化海洋模式6（Modular Ocean Model 6, MOM6，https://github.com/NOAA-GFDL/MOM6）与海冰模拟器2（Sea Ice Simulator, SIS2）构建，相关信息参见Adcroft等人2019年的研究。
该模式网格的水平分辨率为1/8°，可解析中尺度涡旋，未包含涡旋参数化方案。模式垂直方向采用75层混合垂直σ2坐标，并重映射至35层世界海洋图集/耦合模式比对项目标准深度层。
模式的大气强迫场源自日本55年再分析资料版本1.5（Japanese 55-year Reanalysis version 1.5, JRA55 1.5，https://jra.kishou.go.jp/JRA-55/index_en.html#jra-55）。
该模式的径流强迫采用基于Dai与Trenberth（2002）及Dai等人（2009）研究得到的月尺度气候态淡水径流数据，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注入河口附近的对应近海网格单元中。
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等人2020年研究），该模式通过33个示踪剂表征碳、氮、磷、铁、硅、碱度、溶解氧及陆源物质的耦合元素循环，以及相关的浮游食物网动力学过程。关于模式配置的更多细节可参见Liu等人2019年与2021年的研究成果。
本研究隶属于由NOAA研究计划资助、太平洋海洋环境实验室（Pacific Marine Environmental Laboratory, PMEL）主导的项目“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”。

参考文献：

Adcroft, A.、Anderson, W.、Blanton, C.、Bushuk, M.、Dufour, C.O.、Dunne, J.P.、Griffies, S.M. 等人（2019）. GFDL全球海洋与海冰模式OM4.0：模式描述与模拟特征. 《Journal of Advances in Modeling Earth Systems》，doi: 10.1029/2019MS001726

Dai, A.、Qian, T.、Trenberth, K. E. 及Milliman, J. D.（2009）. 1948-2004年大陆淡水径流量变化. 《Journal of Climate》，22卷，2773-2791页

Dai, A. 及Trenberth, K. E.（2002）. 大陆淡水径流量估算：纬度与季节变化. 《Journal of Hydrometeorology》，3卷，660-687页

Liu, X.、Dunne, J.P.、Stock, C. A.、Harrison, M.J.、Adcroft, A.、Resplandy, L. 等人（2019）. 模拟近海水停留时间：全球视角. 《Geophysical Research Letters》，46卷，22期，13910-13919页，doi:10.1029/2019GL085097

Liu, X.、Stock, C.A.、Dunne, J.P.、Lee, M.、Shevliakova, E.、Malyshev, S.、Milly, P.C.D 等人（2021）. 模拟全球近海生态系统对半个世纪河流氮负荷增加的响应

Stock, C. A.、Dunne, J. P.、Fan, S.、Ginoux, P.、John, J.、Krasting, J. P. 等人（2020）. GFDL地球系统模式4.1中的海洋生物地球化学及其对大气CO2增加的响应. 《Journal of Advances in Modeling Earth Systems》，12卷，e2019MS002043，https://doi.org/10.1029/2019MS002043