Add support for changing the year when starting a branch run
还没有人认领这个 Issue。
评估
- 难度
- 5/5
- 预计耗时
- 一周以上
- 新手友好度
- 25/100
- Issue 类型
- 功能
- 描述清晰度
- 需要澄清
- 活跃度
- 停滞
- 领域
- backend
调研方向
首先跟踪 CESM branch-run 的设置以及 restart files 如何保留日历，并将其与 issue 中描述的 hybrid-run 路径进行比较。当一个 branch 能够将年份重置为 0001 或选择任意年份，同时保留 restart 的月份和日期，且不会出现从 9999 到 10000 的失败时，即可视为完成；首先解决日历与五位或六位数年份之间的权衡。
由索引模型根据 Issue 内容生成。
描述
A user ran 9982 years of a 3 degree ocean-ice run (the CORE forcing dataset covers 62 years, so this represents 161 cycles). They then tried to branch off the run for a couple of experiments, and ran into an illegal linear times issue when 9999-12-31 tried to roll over to 10000-01-01. (I believe he's using CESM 2.1, which is MCT-based rather than NUOPC-based, so the error message out of a recent beta tag might be different.)
Anyway, setting up a branch run instead of a hybrid is preferable because a hybrid run doesn't start the ocean component until the second coupling interval... so a branch would be a bit-for-bit continuation while a hybrid would change answers. However, he currently has to use a hybrid because the branch forces the user to keep the calendar from the run being continued.
While I could see an issue with creating a branch run B from the January 1st restart files from run A and trying to claim B starts in the middle of the year, a way to either reset the year to 0001 or set it to an arbitrary YYYY value while keeping the month and day constant would be helpful.
At a recent CSEG meeting, we discussed another option for supporting this use case: using 5 or 6 digits for the year instead of the current 4 digits. That seems more complicated than letting users branch from 9999 and reset the calendar back to 0001, and also has the potential for creating other issues (such as https://github.com/ESMCI/cime/issues/2903).
- 主要语言
- Python
- 星标
- 495
- 派生
- 253
- 平均合并
- 34 分钟
- 30 天内合并 PR
- 4
环境准备
- 没有 Dockerfile 或 Docker Compose 文件
- 有 Pull Request 模板
- 没有贡献指南
从这里开始
- 先读完整个 Issue，再读项目的贡献指南。
- 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
- Fork 仓库，在一个分支上完成修改。
- 提交 Pull Request，并在描述里引用这个 Issue 编号。
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难度 5/5 一周以上 新手友好度 25/100
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