Mushy layer growth and convection, with application to sea ice
Sea ice is a reactive porous medium of ice crystals and liquid brine, which is an example of a mushy layer. The phase behaviour of sea ice controls the evolving material properties and fluid transport through the porous ice, with consequences for ice growth, brine drainage from the ice to provide bu...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Published: |
Royal Society
2019
|
| _version_ | 1826279487271075840 |
|---|---|
| author | Wells, A Hitchen, J Parkinson, J |
| author_facet | Wells, A Hitchen, J Parkinson, J |
| author_sort | Wells, A |
| collection | OXFORD |
| description | Sea ice is a reactive porous medium of ice crystals and liquid brine, which is an example of a mushy layer. The phase behaviour of sea ice controls the evolving material properties and fluid transport through the porous ice, with consequences for ice growth, brine drainage from the ice to provide buoyancy fluxes for the polar oceans, and sea-ice biogeochemistry. We review work on the growth of mushy layers and convective flows driven by density gradients in the interstitial fluid. After introducing the fundamentals of mushy-layer theory, we discuss the effective thermal properties including the impact of salt transport on mushy-layer growth. We present a simplified model for diffusively controlled growth of mushy layers with modest cooling versus the solutal freezing-point depression. For growth from a cold isothermal boundary, salt diffusion modifies mushy layer growth by around 5-20% depending on the far-field temperature and salinity. We also review work on the onset, spatial localisation and nonlinear development of convective flows in mushy layers, highlighting recent work on transient solidification and models of nonlinear convection with dissolved solid-free brine channels. Finally, future research opportunities are identified, motivated by geophysical observations of ice growth. |
| first_indexed | 2024-03-06T23:59:27Z |
| format | Journal article |
| id | oxford-uuid:7569bfa6-e16d-4c5f-8d2a-bcde770feaa2 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:59:27Z |
| publishDate | 2019 |
| publisher | Royal Society |
| record_format | dspace |
| spelling | oxford-uuid:7569bfa6-e16d-4c5f-8d2a-bcde770feaa22022-03-26T20:09:13ZMushy layer growth and convection, with application to sea iceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7569bfa6-e16d-4c5f-8d2a-bcde770feaa2Symplectic Elements at OxfordRoyal Society2019Wells, AHitchen, JParkinson, JSea ice is a reactive porous medium of ice crystals and liquid brine, which is an example of a mushy layer. The phase behaviour of sea ice controls the evolving material properties and fluid transport through the porous ice, with consequences for ice growth, brine drainage from the ice to provide buoyancy fluxes for the polar oceans, and sea-ice biogeochemistry. We review work on the growth of mushy layers and convective flows driven by density gradients in the interstitial fluid. After introducing the fundamentals of mushy-layer theory, we discuss the effective thermal properties including the impact of salt transport on mushy-layer growth. We present a simplified model for diffusively controlled growth of mushy layers with modest cooling versus the solutal freezing-point depression. For growth from a cold isothermal boundary, salt diffusion modifies mushy layer growth by around 5-20% depending on the far-field temperature and salinity. We also review work on the onset, spatial localisation and nonlinear development of convective flows in mushy layers, highlighting recent work on transient solidification and models of nonlinear convection with dissolved solid-free brine channels. Finally, future research opportunities are identified, motivated by geophysical observations of ice growth. |
| spellingShingle | Wells, A Hitchen, J Parkinson, J Mushy layer growth and convection, with application to sea ice |
| title | Mushy layer growth and convection, with application to sea ice |
| title_full | Mushy layer growth and convection, with application to sea ice |
| title_fullStr | Mushy layer growth and convection, with application to sea ice |
| title_full_unstemmed | Mushy layer growth and convection, with application to sea ice |
| title_short | Mushy layer growth and convection, with application to sea ice |
| title_sort | mushy layer growth and convection with application to sea ice |
| work_keys_str_mv | AT wellsa mushylayergrowthandconvectionwithapplicationtoseaice AT hitchenj mushylayergrowthandconvectionwithapplicationtoseaice AT parkinsonj mushylayergrowthandconvectionwithapplicationtoseaice |