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Use literals in double precision #12

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tenomoto opened this issue Oct 1, 2022 · 1 comment
Open

Use literals in double precision #12

tenomoto opened this issue Oct 1, 2022 · 1 comment

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@tenomoto
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tenomoto commented Oct 1, 2022

Unlike Python, the type of a numeric literal is implicitly assumed. Float literals are assumed to be real*4. We need to either explicitly add a type like tref = 288.0_p or promote all floats without type specification with a command line option -fdefault-real-8. With tref = 288.0, tref is declared to be real(p), but an imprecise value of real*4 is assigned without _p after the literal or without the option.
@tenomoto
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tenomoto commented Oct 1, 2022

The difference of surface pressure with and without -fdefault-real-8 (modified minus original).
ps198201100000

@samhatfield samhatfield mentioned this issue Oct 5, 2022
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