ADJ

calm, congenial, convivial, cosy, family, friendly, happy, homely, informal, pleasant, relaxed, warm, welcoming
(highly) charged, emotional, heavy, hostile, oppressive, stifling, strained, tense
carnival, electric, heady, lively
Before the parade, the atmosphere was electric
intimate, romantic
gloomy
rarefied, unique
the rarefied atmosphere of academic life

VERB + ATMOSPHERE

create
She tries to create an atmosphere of calm and security for her children
poison, ruin, sour, spoil
His blunt comments really soured the atmosphere
clear, improve, lighten
His funny remarks lightened the atmosphere
be aware of, be sensitive to, sense
She could sense the hostile atmosphere in the room

ATMOSPHERE + VERB

be charged (with sth)
The atmosphere was charged with excitement
pervade sth, prevail
A relaxed atmosphere prevails in the club

PREP

~ between
Since their argument there had been a strained atmosphere between them

ADJ

heavy, humid, oppressive, polluted, smoky, stale, stifling, stuffy

VERB + ATMOSPHERE

poison, pollute
Pesticides can kill wildlife and pollute the atmosphere
clear
Last night's storm had cleared the atmosphere

ADJ

lower, upper

VERB + ATMOSPHERE

enter, leave, re-enter
The spaceship should re-enter the earth's atmosphere later today
be emitted/released into, escape into
Dangerous gases have escaped into the upper atmosphere

PREP

in the ~
levels of radiation in the atmosphere