DOI: 10.5281/zenodo.2648763
title: Arctic Ocean freshwater dynamics: transient response to increasing river runoff and precipitation [dataset]

description: This dataset contains the underlying data for the manuscript Brown et al., Arctic Ocean freshwater dynamics: transient response to increasing river runoff and precipitation, submitted to JGR-Oceans

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Descriptors in the filenames, shown below as *, correspond to the various simulations, as follows:

Simulations forced with JRA-25 reanalysis data:<br>
AR: Unperturbed control simulation<br>
B1: Simulation involving a step change in river runoff of -30%  <br>
C1: Simulation involving a step change in river runoff of +30% <br>
B7: Simulation involving a step change in precipitation of -30% <br>
C8: Simulation involving a step change in precipitation of +30% 

Simulations forced with the CORE-II climatology:<br>
AR_CORE: Unperturbed control simulation <br>
P-30_CORE: Simulation involving a step change in precipitation of -30% <br>
P+30_CORE: Simulation involving a step change in precipitation of +30% 

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The files named as fwvolume_Sref35_*.nc contain the variables:

freshwater:   horizontally-integrated liquid freshwater volume in m^3<br>
freshwater_pos:  as before, but including only positive values in the integration<br>
h_f:  basin-mean freshwater height in m<br>
h_f_pos:  as before, but including only positive values in the integration

The reference salinity used in each case is 35.

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The files named as freshwater_h_f_*.nc contain horizontally-gridded, depth-integrated liquid freshwater heights in m.  The integration is made to a depth of 276.68m.

h_f_34p8: freshwater height, using a reference salinity of 34.8 <br>
h_f_34p8_pos: as before, but including only positive values in the integration<br>
h_f_35: freshwater height, using a reference salinity of 35 <br>
h_f_35_pos: as before, but including only positive values in the integration

The grid for these files is grid.nc

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The files named as fluxes_ed3_*.nc contain strait-integrated volume fluxes (in m^3 s^-1) into and out of the Arctic domain: 

f: liquid volume flux<br>
fw: freshwater, with variables numbered 1 using a reference salinity of 34.8 and those numbered 2 using a reference salinity of 35<br>
ice: sea ice volume flux

The first dimension, ngate, of the variables indicates the strait:

1) Fram Strait<br>
2) Barents Sea Opening<br>
3) Bering Strait<br>
4) Amundsen Gulf<br>
5) McClure Strait<br>
6) Canadian Arctic Archipelago<br>
7) Nares Strait

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Sea ice volumes (in m^3) for the JRA-25 forced simulations are contained in the files named area_int_*.nc with variable name "ivol"

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Basin-integrated liquid freshwater volumes for a further series of JRA-forced runoff perturbation experiments are contained within the file FWLvol_AO_Sref35_runoff.mat:

R_10: a step increase in runoff of 10%<br>
R_60: a step increase in runoff of 60%<br>
R_100: a step increase in runoff of 100%

The reference salinity is 35 and depth of integration 276.68m