The Design Document page provides a description of the algorithms, implementation and planned testing including unit, verification, validation and performance testing. Please read Step 1.3 Performance Expectations that explains feature documentation requirements from the performance group point of view.
Design Document
| Expand | ||
|---|---|---|
| ||
The first table in Design Document gives overview of this document, from this info the Design Documents Overview page is automatically created. In the overview table below 4.Equ means Equations and Algorithms, 5.Ver means Verification, 6.Perf - Performance, 7. Val - Validation
Use the symbols below (copy and paste) to indicate if the section is in progress or done or not started. |
...
| Page Properties | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||||||||
|
...
| Expand | |||
|---|---|---|---|
| |||
|
Title: Gravity Wave Modifications for Improved QBO
Requirements and Design
E3SM Group_name (for example Watercycle) Water Cycle
Date:
Summary
The convective gravity wave (GW) source parameterization in large part controls the stratospheric quasi-biennial oscillation (QBO). In E3SM, v1 the QBO is too strong and too fast. We have made modifications to parameters in the GW parameterization that improve the representation of the QBO in terms of the period and amplitude.
Requirements
Requirement: Minor changes to source and namelist
Date last modified:
Contributors: Wuyin Lin, Jadwiga (Yaga) Richter (Unlicensed)
Algorithmic Formulations
Design solution: All the code mods that are required are as follows:
real(r8), parameter :: CF = 12.5_r8
and in user_nl_cam
effgw_beres = 0.35
Date last modified:
Contributors: Jadwiga (Yaga) Richter (Unlicensed) Chih-Chieh-Jack Chen Wuyin Lin
Design and Implementation
Implementation:
Transfer above parameters to code
Date last modified:
Contributors: Jadwiga (Yaga) Richter (Unlicensed) Wuyin Lin
Planned Verification and Unit Testing
Verification and Unit Testing:
Date last modified:
Contributors: Wuyin Lin
How will XXX be tested? i.e. how will be we know when we have met requirement XXX. Will these unit tests be included in the ongoing going forward?
Planned Validation Testing
Validation Testing:
30 yrs AMIP and coupled simulations: comparisons of QBO in simulations with above parameter changes in E3SMv1 (already ran and submitted for publication);
Evaluation of resolved wave spectra. Need to have daily means of: PRECT, OMEGA500, FLUT, U200, and U850 in output.
Date last modified:
Contributors: Jadwiga (Yaga) Richter (Unlicensed)
Planned Performance Testing
Performance Testing:
Date last modified:
Contributors: Jadwiga (Yaga) Richter (Unlicensed) Wuyin Lin
Performance of the code should not be affected. Only parameter changes. Timings can be compared to previous runs.
...