It is known that in the east of Australia there is a large annual amount of atmospheric precipitation.

It is known that in the east of Australia there is a large annual amount of atmospheric precipitation. what are the main reasons for this?

In warm climatic zones where Australia is located (subequatorial, tropical and subtropical), trade winds and monsoons bring the bulk of moisture to the continent. And they always blow from the east. Since there is a long mountain system in the east of the mainland, the clouds collide with it, and most of the moisture in the form of rain falls on the slopes of these mountains. And thus, the eastern territories of the continent are more humid than the west, where the already dry trade winds reach, and turn vast lands into desert.