Addition for or of wind characteristics

[madbkr]

Description of the issue

The new tasks-module for the OEO deals with task and subtask definitions to describe research data. One phrase that regularly pops up in there is wind characteristics.
In a meeting @stap-m and I agreed to add a little explanation what wind characteristics are in the definitions where those are mentioned, see also #1891

However wind characteristics may be worth becoming it's own class. If so we should discuss where in the OEO it would fit. An idea that was mentioned would be as a process attribute.

According to @tpelser, who provided the tasks for the module, wind characteristics include speed, direction, frequency, turbulence, and seasonal or diurnal patterns.

Ideas of solution

If you already have ideas for the solution describe them here

Workflow checklist

• [ x] I discussed the issue with someone else than me before working on a solution
• [ x] I already read the latest version of the workflow for this repository
• [ x] The goal of this ontology is clear to me

I am aware that

• [ x] every entry in the ontology should have a definition
• [ x] classes should arise from concepts rather than from words