ameza ocean heat content (take 2)

[ggebbie]

plenty of duplicated code in vars2sigma. Merged but should be a better way to reuse code, eliminate copy/paste bugs.

Any need for test.jl? Seems to repeat information included in src/ECCOtour.jl

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -4.41 :warning:

Comparison is base (a9372b2) 30.62% compared to head (eda3e2a) 26.21%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #61 +/- ## ========================================== - Coverage 30.62% 26.21% -4.41% ========================================== Files 4 4 Lines 983 1148 +165 ========================================== Hits 301 301 - Misses 682 847 +165 ``` | [Impacted Files](https://app.codecov.io/gh/ggebbie/ECCOtour.jl/pull/61?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=G+Jake+Gebbie) | Coverage Δ | | |---|---|---| | [src/ECCOtour.jl](https://app.codecov.io/gh/ggebbie/ECCOtour.jl/pull/61?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=G+Jake+Gebbie#diff-c3JjL0VDQ090b3VyLmps) | `32.26% <0.00%> (-4.86%)` | :arrow_down: | | [src/MatrixFilter.jl](https://app.codecov.io/gh/ggebbie/ECCOtour.jl/pull/61?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=G+Jake+Gebbie#diff-c3JjL01hdHJpeEZpbHRlci5qbA==) | `0.00% <0.00%> (ø)` | |

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