北部 (běi bù) means “northern part” | MotiTan Chinese Dictionary

More examples

北部的夏天通常不太热。běi bù de xià tiān tōng cháng bú tài rè

Summer in the northern part is usually not very hot.

A larger area's northern side viewed as one connected geographic section rather than as a single point.

北方běi fāng: The north as a broad geographic region.
北边běi biān: The north side or location of a particular place.

某一地区或国家的北边部分，指位于该地区北侧的区域或范围。mǒu yí dì qū huò guó jiā de běi biān bù fèn zhǐ wèi yú gāi dì qū běi cè de qū yù huò fàn wéi

北 (běi, "north") + 部 (bù, "section") forms a compound for the section of a larger area that lies on its north side.

In weather and regional news, this word often follows a country, province, or city name in reports about conditions or transport.