The times of the prayers are close together in the North – is it permissible to put them together?

No File Exists
Check below answers in case you are looking for other related questions:
How to pray and fast in countries where the day or night is continuous
Timing of ‘Isha’ prayer in regions where the red afterglow (or twilight) does not disappear until very late

No File Exists
Related Answers:
Her menses started after the time for Zuhr began; should she make it up when her period is over?
The people in his mosque pray Fajr before the proper time; should he pray with them?
Prayer and fasting of a prisoner who does not know anything about time
How to pray and fast in countries where the day or night is continuous
Timing of ‘Isha’ prayer in regions where the red afterglow (or twilight) does not disappear until very late

Recommended answers for you:
Etiquette of intimate relations
Minimum distance of travel at which it is permissible not to fast and to shorten prayers
What is the ruling on drinking one’s wife’s milk?
Where is the soul, and what happens to it, after a person has died and before he is buried?
Hitting one’s wife?