Supporting model output for article "Relative Impact of Sea Ice and Temperature Changes on Arctic Marine Production"

The following is a summary of processed model output data from a series of HiLAT model runs. A description of the model runs and visualization of model output and analysis can be found in the accompanying manuscript.

Gibson, G.A., Weijer, W., Jeffery, N. and Wang, S (2020) Relative impact of sea ice and temperature changes on Arctic marine production. Journal of Geophysical Research: Biogeosciences. DOI: 10.1029/2019JG005343

The model outputs and accompanying research was supported by the  National Science Foundation 173886 and by DOE | SC |Biological and Environmental Research (BER).

There are 4 versions of most output file types, corresponding to the 4 experiments that were conducted.

These experiments are:

i) the baseline model simulation (Base);

ii) a moderate ice reduction experiment (S1);

iii) a dramatic ice reduction experiment (S2); and

iv) an atmospheric warming scenario (RCP45).

Each of the 4 experiments is described in detail in Gibson et al (2020).

Many variables in the output files are regional averages where model regions are indicated by a number *note - for aesthetics, the numbering used in the model output files differs slightly from the numbering used in the accompanying manuscript. 

Bering Sea =1

Chukchi Sea =2 

East Siberian Sea =3

Laptev Sea =4 

Beaufort Sea =5

Barents Sea =6

Canadian =7 

Eurasian Basins =8 

Nordic Seas =9

Labrador Sea=10

Kara Sea =11

Grid

gx1v6_polar_mask.10.12.18.nc  This file is the original grid file used for all model runs with the addition of Arctic_Region and Antarctic_Polar_Front variables which indicates which grid cells are in the model regions described above.

Forcing

ncep_RCP45 ncep.t_10.T62.*.nc where * is 1948-2009 These files contain the modified atmospheric forcing used for the RCP45 model experiment. The unmodified NCEP forcing is freely publically available elsewhere to not duplicated here

Ice

Ice-Regional-Monthly-177-186-*.nc where * indicates model run - Base, S1, S2 or RCP45. These file contain the monthly averaged ice variables (ice area, ice algae production) for each model region for the last ten years of the model run.

cice-monthly-177-186-*.nc where * indicates model run - Base, S1, S2 or RCP45. These file are the monthly averaged output filed from the cice model. Variables are averaged over each model analysis region.

Ice_snow_depth_region_Avg-137-186-*.nc where * indicates model run - Base, S1, S2 or RCP45. These file contain the regionally averaged ice and snow depth for each analysis region.

IceVol_Base-137-186.nc Contains ice variable file for the baseline model run. Model contains ice variables hi and aice for every grid cell of the model domain. Ice volume was computed as hi * Tarea (from grid file).

Annual-SummerAvg-IceArea-177-186_*.nc  Where * indicates model run - Base, S1, S2 or RCP45. Each of these files contains the annual average ice area averaged over Summer months (JuneAugust) for last 10 years of model run (200-2009) for each grid cell in the HiLAT model

Ocean variables

TempNitrate TEMP_NO-177-186.nc This file contains model estimates of temperature and nitrate for the baseline model run for model years 177-186 (2000-2009, the last en years of the model run) for the upper five model layers (500, 1500, 2500, 3500, 4500 cm).

CO2flux

AnnAvgAllCflux*.nc

Where * indicates model run - Base, S1, S2 or RCP45. Each of these files contains the annual average CO2 Flux for last 10 years of model run (200-2009) for each grid cell of the HiLAT model.

CO2flux_region_avg-177-186-*.nc  Where * indicates model run - Base, S1, S2 or RCP45. Each of these files contains the annual average CO2 Flux for last 10 years of model run (2000-2009) for each region of the HiLAT model.

Ocean Production

OceanProd_Year-147-156-*.nc OceanProd_Year-157-166-*.nc OceanProd_Year-167-176-*.nc OceanProd_Year-177-186-*.nc Where * indicates model run - Base, S1, S2 or RCP45. These file contain the annual average vertically integrated ocean phytoplankton production for each grid cell. Each file contains 10 model years  is the sum of diatoms, diazotrophs, phaeocystis, and smaller phytoplankton.

Region_production_by_phyto_group-diat_ps-137-186-*.nc Where * indicates model run - Base, S1, S2 or RCP45. These file contain the annual average vertically integrated ocean phytoplankton production for each region. Each file contains group specific production for diatoms, diazotrophs, phaeocystis, and smaller phytoplankton.

OceanProd_Daily-177-186-BASE.nc This file contains the daily average vertically integrated ocean phytoplankton production for each grid cell. The file contains 10 model years. Production is the sum of all four phytoplankton groups - diatoms, diazotrophs, phaeocystis, and smaller phytoplankton.

PAR

PAR-MonthyAvg-177-168-*.nc

Photosynthetically Active Radiation in the ocean. Where * indicates model run - Base, S1, S2 or RCP45.

以下为一系列HiLAT模型运行后经处理的模型输出数据汇总。关于模型运行流程、模型输出可视化与分析方法的详细说明，可参见随附的研究手稿。

Gibson, G.A.、Weijer, W.、Jeffery, N.与Wang, S.（2020）《海冰与温度变化对北极海洋生产力的相对影响》，《地球物理研究杂志：生物地球科学》，DOI: 10.1029/2019JG005343

本模型输出及配套研究得到美国国家科学基金会（National Science Foundation）项目编号173886，以及美国能源部（DOE）科学局（SC）生物与环境研究局（BER）的资助。

多数输出文件类型包含4个版本，分别对应本次开展的4组对照试验。

本次设置的4组试验如下：
i) 基准模型模拟（Base）；
ii) 海冰适度消融试验（S1）；
iii) 海冰大幅消融试验（S2）；
iv) 大气增温情景试验（RCP45）。
4组试验的详细说明详见Gibson等人（2020）的研究。

输出文件中的多数变量为区域平均值，模型区域以数字标识。*注：为美观起见，模型输出文件中使用的区域编号与随附手稿中的编号略有差异。
白令海=1
楚科奇海=2
东西伯利亚海=3
拉普捷夫海=4
波弗特海=5
巴伦支海=6
加拿大海盆=7
欧亚海盆=8
挪威海=9
拉布拉多海=10
喀拉海=11

网格文件
gx1v6_polar_mask.10.12.18.nc：该文件为所有模型运行所使用的原始网格文件，新增了`Arctic_Region`与`Antarctic_Polar_Front`变量，用于标识各网格单元属于前文所述的哪个模型区域。

强迫场数据
ncep_RCP45 ncep.t_10.T62.*.nc（其中*代表1948-2009）：此类文件包含RCP45试验所使用的修正后大气强迫场数据。未修正的NCEP强迫场数据可在其他渠道免费获取，故此处不再重复提供。

海冰相关数据
Ice-Regional-Monthly-177-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含模型运行最后10年中，各模型区域的逐月平均海冰变量数据（海冰面积、冰藻生产力）。

cice-monthly-177-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件为cice模型输出的逐月平均数据，变量已在各模型分析区域内完成平均。

Ice_snow_depth_region_Avg-137-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含各分析区域的区域平均海冰与积雪厚度数据。

IceVol_Base-137-186.nc：该文件为基准模型模拟的海冰变量数据，包含模型全域每个网格单元的海冰厚度（hi）与海冰面积（aice）变量。海冰体积通过公式hi × Tarea（取自网格文件）计算得到。

Annual-SummerAvg-IceArea-177-186_*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含模型运行最后10年（2000-2009）中，每年夏季（6-8月）的平均海冰面积数据，覆盖HiLAT模型的所有网格单元。

海洋变量数据
TempNitrate TEMP_NO-177-186.nc：该文件包含基准模型模拟在模型年份177-186（即2000-2009，模型运行最后10年）中，上层5个模型层（深度分别为500、1500、2500、3500、4500 cm）的温度与硝酸盐浓度模拟结果。

二氧化碳通量数据
AnnAvgAllCflux*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含模型运行最后10年（2000-2009）中，HiLAT模型每个网格单元的年平均二氧化碳通量数据。

CO2flux_region_avg-177-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含模型运行最后10年（2000-2009）中，HiLAT模型各区域的年平均二氧化碳通量数据。

海洋生产力数据
OceanProd_Year-147-156-*.nc、OceanProd_Year-157-166-*.nc、OceanProd_Year-167-176-*.nc、OceanProd_Year-177-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含各网格单元的年平均垂直积分海洋浮游植物生产力数据。每个文件对应10个模型年，生产力为硅藻、固氮蓝藻、棕囊藻与小型浮游植物的总生产量。

Region_production_by_phyto_group-diat_ps-137-186-*.nc（*代表模型试验组：Base、S1、S2或RCP45）：此类文件包含各区域的年平均垂直积分海洋浮游植物生产力数据，每个文件分别给出硅藻、固氮蓝藻、棕囊藻与小型浮游植物的类群特异性生产量。

OceanProd_Daily-177-186-BASE.nc：该文件包含基准试验组中各网格单元的日平均垂直积分海洋浮游植物生产力数据，覆盖10个模型年，生产力为硅藻、固氮蓝藻、棕囊藻与小型浮游植物的总生产量。

光合有效辐射（PAR）数据
PAR-MonthlyAvg-177-168-*.nc
海洋光合有效辐射数据（*代表模型试验组：Base、S1、S2或RCP45）。