Merge pull request #1772 from OceanParcels/CROCO_fix_sigma_calculation #363

Job	Run time
mypy	3m 50s
py3.13 \| macos \| integration tests	19m 35s
py3.13 \| macos \| unit tests	10m 38s
py3.13 \| ubuntu \| integration tests	18m 0s
py3.13 \| ubuntu \| unit tests	13m 16s
py3.13 \| windows \| integration tests	31m 58s
py3.13 \| windows \| unit tests	20m 31s
py3.10 \| ubuntu \| integration tests	19m 38s
py3.10 \| ubuntu \| unit tests	12m 50s
py3.11 \| ubuntu \| unit tests	13m 24s
py3.12 \| ubuntu \| unit tests	13m 17s
merge-test-artifacts	3s
	2h 57m 0s

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