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Cordilleran ice sheet improved bedrock simulations continuous variables

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Zenodo2024-04-08 更新2026-05-26 收录
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These data contain a subset of time-dependent glacier model output variables. The ghf70 data files are an update on the reference below, fixing significant problems affecting the computation of the bedrock deformation in response to ice load (PISM Github issues #370 and #377) and the computation of ice temperature (PISM Github issue #371). The other data files additionally include spatially-variable geothermal heat flux (dav13, gou11comb, gou11simi, sha04), different lithospheric rigidity (eet30km) or mantle viscosity (num1e21), and higher horizontal resolution (3km). Reference: Seguinot, J., Rogozhina, I., Stroeven, A. P., Margold, M. and Kleman, J.: Numerical simulations of the Cordilleran ice sheet through the last glacial cycle, The Cryosphere, 10(2), 639–664, doi:10.5194/tc-10-639-2016, 2016. File names: cisbed.{res}.{forcing}.{ex.100a|ts.10a}.{ghf}.{props}.nc Horizontal resolution: 10km: 10 km horizontal resolution 5km: 5 km horizontal resolution 3km: 3 km horizontal resolution Temperature forcing: epica: EPICA ice core temperature forcing grip: GRIP ice core temperature forcing Variable types: ex.100a: spatial diagnostics every hundred years ts.10a: scalar time-series every ten years Geothermal heat flow: ghf70: constant 70 mW m-2 heat flow dav13: Davies (2013) geothermal heat flow map gou11comb: Goutorbe et al. (2011) best combination method gou11simi: Goutorbe et al. (2011) similarity method sha04: Shapiro and Ritzwoller (2004) heat flow map Bedrock properties eet30km: lithosphere elastic thickness of 30 km num1e21: astenosphere viscosity of 1e21 Pa s Data format: The data use compressed netCDF format. For quick inspection I recommend ncview. Spatial diagnostics (*.ex.100a.nc) can be converted to GeoTIFF (and other GIS formats) e.g. using GDAL: gdal_translate NETCDF:filename.nc:variable -b band filename.variable.band.tif The list of variables (subdatasets) can be obtained from ncdump or gdalinfo. Band information can be displayed with: gdalinfo NETCDF:filename.nc:variable Variable long names, units, PISM configuration parametres and additional information are contained within the netCDF metadata. Funding: Swiss National Supercomputing Centre (CSCS) grants s573 and sm13 to J. Seguinot, Swiss National Science Foundation (SNSF) grants no.~200020-169558 and 200021-153179/1 to M. Funk, and Research Foundation – Flanders (FWO) Odysseus Type II project G0DCA23N 'GlaciersMD' to H. Zekollari. Changelog: Version 1: Initial version.

本数据集包含一组随时间变化的冰川模型输出变量子集。其中ghf70数据文件是下述参考文献的更新版本,修复了影响冰荷载响应下基岩变形计算(对应PISM GitHub议题#370与#377)以及冰温计算(对应PISM GitHub议题#371)的若干重大问题。其余数据文件则额外包含空间可变的地热热流(dav13、gou11comb、gou11simi、sha04)、不同的岩石圈刚度(eet30km)或地幔黏度(num1e21),以及更高的水平分辨率(3km)。 参考文献: Seguinot J, Rogozhina I, Stroeven A P, 等. 末次冰期循环中科迪勒拉冰盖的数值模拟[J]. 冰冻圈, 2016, 10(2): 639-664. DOI:10.5194/tc-10-639-2016. 文件名格式: cisbed.{res}.{forcing}.{ex.100a|ts.10a}.{ghf}.{props}.nc 水平分辨率: 10km:10千米空间分辨率 5km:5千米空间分辨率 3km:3千米空间分辨率 温度强迫场: epica:基于EPICA冰芯的温度强迫场 grip:基于GRIP冰芯的温度强迫场 变量类型: ex.100a:每百年输出一次的空间诊断变量 ts.10a:每十年输出一次的标量时间序列变量 地热热流方案: ghf70:恒定70 mW·m⁻²的热流值 dav13:Davies(2013)地热热流分布图 gou11comb:Goutorbe等(2011)最优组合法热流场 gou11simi:Goutorbe等(2011)相似性法热流场 sha04:Shapiro与Ritzwoller(2004)热流分布图 基岩属性: eet30km:岩石圈弹性厚度为30千米 num1e21:软流圈黏度为1×10²¹ Pa·s 数据格式: 本数据集采用压缩版netCDF(网络通用数据格式)存储。如需快速预览,推荐使用ncview工具。空间诊断文件(*.ex.100a.nc)可通过GDAL工具转换为GeoTIFF(及其他GIS格式),示例命令如下: gdal_translate NETCDF:filename.nc:variable -b band filename.variable.band.tif 变量(子数据集)列表可通过ncdump或gdalinfo命令获取。波段信息可通过以下命令查看: gdalinfo NETCDF:filename.nc:variable 变量的长名称、单位、PISM配置参数及其他附加信息均存储于netCDF文件的元数据中。 资助信息: 本研究受瑞士国家超级计算中心(CSCS)项目s573与sm13资助(J. Seguinot)、瑞士国家科学基金会(SNSF)项目编号200020-169558及200021-153179/1资助(M. Funk),以及佛兰德斯研究基金会(FWO)奥德修斯II型项目G0DCA23N "GlaciersMD"资助(H. Zekollari)。 更新日志: 版本1:初始发布版本。

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2024-04-08
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