CMIP5里Ensemble 到底什么意思？

xuhaifei

Ensemble 到底什么意思？比如搜索出来ensemble=r1i1p1   ensemble=r3i1p1 选哪个数据呢？谁能仔细说说 谢谢了

xuhaifei

氤氲墓魂 发表于 2015-10-16 12:44
r- historical runs initialized from different times of a control run.
i- initialization method indi ...

我搜索出来只有ensemble=r1i1p1   ensemble=r3i1p1，是不是两个都下载下来，读取完数据后，取他们的集合平均值来做研究？

氤氲墓魂

r- historical runs initialized from different times of a control run.
i- initialization method indicator
p- 'perturbed physics' number

十一郎

你好，楼主，同样的困惑呐，你解决了没，可否交流一下，谢了

小菜朱

CMIP原文里关于r,f,i,p的解释如下A small amount  of manual input will be required to describe how the simulations vary across the four “ensemble axes”, i.e. the realization (r), initialization (i), perturbation (p) and forcing (f) axes of the ensemble. If the ensemble does not vary along one of these axes then no action is necessary. This extra information will be collected either via spreadsheet or in an iPython notebook.
以及CMIP6的文章里也解释了这些编号：1Here, we distinguish between an applied input perturbation
(e.g. the imposed change in some model constituent, property, or boundary condition), which we refer to somewhat generically as a “forcing”, and radiative forcing, which can be precisely defined. Even if the forcings are identical, the resulting radiative forcing depends on a model’s radiation scheme (among other factors) and will differ among model
以f为例，所强调的是模式运行时官方所提供的不同的强迫场，因为也没法评定哪一个强迫场更好，所以就允许不同的模式组更加不同的情况来使用，如果你不是评估这个强迫场的不确定性的话，应该就没有必要来考虑f后面这个系数的差别，不同模式你就确保这个f后面系数一致，所以可以比较就好了

阿藜

小菜朱 发表于 2019-10-25 15:04
CMIP原文里关于r,f,i,p的解释如下A small amount  of manual input will be required to describe how the  ...

你好，请问cmip5和cmip6的这种说明文件论坛里有吗，或者方便的话，可以给我发一个下载地址吗？谢谢

nnlovess

有同样的困惑，不过看了解答貌似有了想法

Murray

那r，i，
p怎么选择呢