We know two reasons. First reason. The land area in the northern hemisphere is larger than in the southern. The second reason. In the equator-subtropics band, there are few lakes in both the northern and southern hemispheres due to intense evaporation. In temperate latitudes, where there are many lakes in the northern hemisphere, there is practically no land in the southern hemisphere. Remark. If the ice of Antarctica melts, then in the southern hemisphere the number of lakes will increase dramatically due to the increase in land area.

Hello Soran; There are certainly a number of good answers to your question. Here is mine. Lakes fill with sediment rapidly and so most are transformed into wetlands and meadows pretty quickly. Since the last glacial maximum about 18,000 years bp, the number of such transformations has steadily increased. Many mountain lakes persist because they are only recently exposed as glaciers retreat...they are new.

One other mechanism is the formation of cut-off meanders in low-elevation rivers. Those probably have very short life expectancies as their nearby river continues to change course. Best regards, Jim Des Lauriers

The most natural lakes are located in the northern part of the Earth because this area experiences colder climates, which allows for larger bodies of water to form and remain solidified for longer periods of time. The cold temperatures also create an environment where water is less likely to evaporate, resulting in deeper and larger natural lakes. Additionally, the northern region of the Earth has many mountainous areas, which can provide further runoff for lake formation.