{"id":22156061,"url":"https://github.com/daniel-furman/ice-densification-research","last_synced_at":"2025-07-09T06:07:43.052Z","repository":{"id":134531096,"uuid":"294229605","full_name":"daniel-furman/ice-densification-research","owner":"daniel-furman","description":"All data and analyses to reproduce my ice material science research, as published in Penn Science: Furman and Goldsby, 2021. ","archived":false,"fork":false,"pushed_at":"2021-05-05T21:39:56.000Z","size":7416,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-03-24T14:37:32.716Z","etag":null,"topics":["compaction","dislocation-creep","firn","grain-size","ice-sheets","material-science","mechanism-maps","rheology","scientific-computing","sympy-library"],"latest_commit_sha":null,"homepage":"https://nbviewer.jupyter.org/github/daniel-furman/ice-densification-research/blob/master/Firn_notebook.ipynb","language":"Jupyter Notebook","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/daniel-furman.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-09-09T21:06:32.000Z","updated_at":"2023-07-18T09:12:42.000Z","dependencies_parsed_at":"2023-06-17T13:15:43.769Z","dependency_job_id":null,"html_url":"https://github.com/daniel-furman/ice-densification-research","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/daniel-furman/ice-densification-research","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daniel-furman%2Fice-densification-research","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daniel-furman%2Fice-densification-research/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daniel-furman%2Fice-densification-research/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daniel-furman%2Fice-densification-research/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/daniel-furman","download_url":"https://codeload.github.com/daniel-furman/ice-densification-research/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daniel-furman%2Fice-densification-research/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":264403798,"owners_count":23602621,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["compaction","dislocation-creep","firn","grain-size","ice-sheets","material-science","mechanism-maps","rheology","scientific-computing","sympy-library"],"created_at":"2024-12-02T02:35:10.084Z","updated_at":"2025-07-09T06:07:43.035Z","avatar_url":"https://github.com/daniel-furman.png","language":"Jupyter Notebook","funding_links":[],"categories":[],"sub_categories":[],"readme":"## The Rheological Behavior of Firn: Experimental Observations of Dislocation Creep via Grain Boundary Sliding\n\n*How does grain size, strain state, and microstructure influence the rheological behavior of ice compaction among glaciers and ice sheets?*\n\n**[`Firn_notebook.ipynb`](https://nbviewer.jupyter.org/github/daniel-furman/Furman-and-Goldsby/blob/master/Firn_notebook.ipynb)**\n\n ---\n \n \nExperimental results | Mechanism map for firn  \n:-------------------------------------------:|:------------------------------:\n![](data/exp-interv.png) | ![](data/map.png)\n\n\n### Key Points\n\n---\n\n* Constant stress laboratory experiments were performed on H20 ice powder samples with roughly uniform grain size varying from 5 to 550 micrometers (µm) in radius. \n*\tTwo rheologically-distinct creep regimes emerged, characterized by their grain size sensitivity and stress dependence: dislocation creep (n ~ 3.7, p ~ 0) and disGBS (n ~ 1.6, p ~ 0.9). \n*\tFlow laws resolved the disGBS mechanism as predominantly rate-limiting for natural conditions, such as in glaciers and ice sheets.  \n\n### Data\n\n---\n\nOutput from compaction tests (compaction*.csv) and pressure-density profiles (site-name*.csv) are contained in the data/ subfolder. \n\n\n### Paper Figures\n\n---\n\nFigure 1: From (a) [Breant et al. (2017)](https://doi.org/10.5194/cp-13-833-2017) (their Figure 3) and (b) [Faria et al. (2014)](https://doi.org/10.1016/j.jsg.2013.11.003) (their Figure 7). \u003cbr\u003e\u003cbr\u003e\nFigure 2: Photographs taken in the laboratory and diagram made with PowerPoint \u003cbr\u003e\u003cbr\u003e\nFigure 3: `flow_law_fiting.py` \u003cbr\u003e\u003cbr\u003e\nFigure 4: `mechanism_maps.py` \u003cbr\u003e\u003cbr\u003e\nTable S1: `calc_dens_rates.py` \u003cbr\u003e\u003cbr\u003e\n\n### Workflow\n\n---\n\nThe programming workflow is available in [`Firn_notebook.ipynb`](https://nbviewer.jupyter.org/github/daniel-furman/Furman-and-Goldsby/blob/master/Firn_notebook.ipynb), where each .py script is ran in an easy to follow sequence.\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdaniel-furman%2Fice-densification-research","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdaniel-furman%2Fice-densification-research","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdaniel-furman%2Fice-densification-research/lists"}