# Variables in the ensemble samples

**URL:** <https://forums.jcsda.org/t/variables-in-the-ensemble-samples/710>\
**Category:** JEDI\
**Created:** [November 7, 2025, 3:00pm UTC](https://forums.jcsda.org/t/variables-in-the-ensemble-samples/710 "2025-11-07T15:00:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![LL\_GZ](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.jcsda.org/ll_gz/32/107_2.png) [@LL\_GZ](https://forums.jcsda.org/u/LL_GZ)\
**Post date:** [November 7, 2025, 3:00pm UTC](https://forums.jcsda.org/t/variables-in-the-ensemble-samples/710/1 "2025-11-07T15:00:23Z")

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When using MPAS-JEDI for ensemble variational data assimilation, what variables need to be included in the generated sample files?

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**Author:** ![byoung-joo](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.jcsda.org/byoung-joo/32/126_2.png) [@byoung-joo](https://forums.jcsda.org/u/byoung-joo)\
**Post date:** [November 11, 2025, 5:40pm UTC](https://forums.jcsda.org/t/variables-in-the-ensemble-samples/710/2 "2025-11-11T17:40:58Z")

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Hi @LL_GZ ,

These variables are typically used for ensemble covariance of variational application.

> <https://github.com/JCSDA/mpas-jedi/blob/develop/test/testinput/namelists/stream_list.atmosphere.ensemble>

Thank you,  
BJ