Meltrate of basal ice shelves at difference inclination

• Other Authors: GAYEN, BISAKHDATTA (hasPrincipalInvestigator), GAYEN, BISAKHDATTA (processor), MONDAL, MAINAK (hasPrincipalInvestigator), MONDAL, MAINAK (processor), Australian Antarctic Data Centre (publisher)
• Format: Dataset
• Language: unknown
• Published: Australian Antarctic Data Centre
• Subjects: climatologyMeteorologyAtmosphere; oceans; ICE SHEETS; EARTH SCIENCE; CRYOSPHERE; GLACIERS/ICE SHEETS; EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS > ICE SHEET MEASUREMENTS; SALINITY; SEA ICE; SNOW/ICE TEMPERATURE; SNOW/ICE; DIRECT NUMERICAL SIMULATION; DNS; SLOPE ANGLE; MELT RATE; Computer > Computer; MODELS; EARTH SCIENCE SERVICES; GEOGRAPHIC REGION > POLAR; CONTINENT > ANTARCTICA; OCEAN > SOUTHERN OCEAN; Southern Ocean; Antarc*; Antarctica; Ice Sheet; Ice Shelves; Sea ice
• Online Access: https://researchdata.ands.org.au/meltrate-basal-ice-difference-inclination/1330271; https://doi.org/10.4225/15/5b022497c7b72; https://data.aad.gov.au/metadata/records/AAS_4422_Slope_Meltrate; http://nla.gov.au/nla.party-617536

Direct Numerical Simulation (DNS) was used to study the effect of sloping the ice-shelves on the dissolution/melt rate at the ice-ocean interface. The simulations were done on the HPC Raijin at NCI, Canberra over March 2015 to June 2017. Numerical experiments were carried out over a range of slope angle (5 degrees – 90 degrees) of the ice-shelves measured from the horizon. Turbulent flow field is simulated over the domain length of 1.8 m, (for slope angle greater than or equal to 50 degrees) and 20 m (for slope angle less than or equal to 20 degrees) respectively; the flow-field is laminar otherwise. A constant ambient temperature 2.3 degrees C and salinity 35 psu is maintained throughout the simulations. The DNS successfully resolved all possible turbulence length scales and relative contributions of diffusive and turbulent heat transfer into the ice wall is measured. Data available: Excel file Meltrate_vs_slopeangle_lam_turb.xlsx contains both simulated laminar and turbulent dissolution/melt rate as a function of slope angle along with their analytical values based on laminar and turbulent scaling theory respectively.