大たい気き組そ成せい

Meanings

1

noun

atmospheric composition

Technical term used in earth science, environmental science, and related fields.

turn into, become, get

大たい気き
大気 means 'atmosphere' in general, while 大気組成 specifically refers to the chemical makeup of the atmosphere.
組そ成せい
組成 means 'composition' or 'makeup' and can be used for various materials; 大気組成 is a specific compound for atmospheric composition.

Compound of 大気 (atmosphere) and 組成 (composition).