Identification

Title

Towards characterizing the variability of statistically consistent Community Earth System Model simulations

Abstract

Large, complex codes such as earth system models are in a constant state of development, requiring frequent software quality assurance. The recently developed Community Earth System Model (CESM) Ensemble Consistency Test (CESM-ECT) provides an objective measure of statistical consistency for new CESM simulation runs, which has greatly facilitated error detection and rapid feedback for model users and developers. CESM-ECT determines consistency based on an ensemble of simulations that represent the same earth system model. Its statistical distribution embodies the natural variability of the model. Clearly the composition of the employed ensemble is critical to CESM-ECT's effectiveness. In this work we examine whether the composition of the CESM-ECT ensemble is adequate for characterizing the variability of a consistent climate. To this end, we introduce minimal code changes into CESM that should pass the CESM-ECT, and we evaluate the composition of the CESM-ECT ensemble in this context. We suggest an improved ensemble composition that better captures the accepted variability induced by code changes, compiler changes, and optimizations, thus more precisely facilitating the detection of errors in the CESM hardware or software stack as well as enabling more in-depth code optimization and the adoption of new technologies.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7xd13br

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2016-07-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact