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Adds differentiation operator#1979

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David Flack (daflack) wants to merge 4 commits intomainfrom
1959_differentiation
Open

Adds differentiation operator#1979
David Flack (daflack) wants to merge 4 commits intomainfrom
1959_differentiation

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@daflack David Flack (daflack) commented Mar 17, 2026

This is a simple differentiation operator that acts as a wrapper around iris.analysis.calculus.differentiate. Spherical coordinate differentiation is not possible with this operator.

This is an enabling PR which will allow extreme rainfall diagnostics to be calculated, but will also allow be useful for other areas. No recipes are included as it is likely to form part of recipes in the future.

Fixes #1959

Contribution checklist

Aim to have all relevant checks ticked off before merging. See the developer's guide for more detail.

  • Documentation has been updated to reflect change.
  • New code has tests, and affected old tests have been updated.
  • All tests and CI checks pass.
  • Ensured the pull request title is descriptive.
  • Ensure rose-suite.conf.example has been updated if new diagnostic added.
  • Conda lock files have been updated if dependencies have changed.
  • Attributed any Generative AI, such as GitHub Copilot, used in this PR.
  • Marked the PR as ready to review.

@daflack David Flack (daflack) self-assigned this Mar 17, 2026
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github-actions bot commented Mar 17, 2026

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@daflack David Flack (daflack) changed the title Adds a differentiation operator Adds differentiation operator Mar 17, 2026
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Cube differentiation operator (cartesian)

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