This is an exaple of verbal Irony. the character said "it is so cold" when it is obviously very cold.
This is an example of situational irony. You would not expect a police man to be breaking the law. They should be following the law and arresting others.
This is an example of dramatic irony. The characters are amazed at the beauty and do not know that they are actually going to die when they they say that they could. The viewer knows that the characters are actually going to die and they are just watching and waiting for the tragic event to finally happen