tpo24 听写 conversation2

Well, the hydrological cycle, I remember we went over a diagram in class. And from what I remember, water changes back and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow as precipitation. It’s constantly being recycled through evaporation and condensation. Ok, I guess what I am really confused about is how the topography of the land, mountains and valleys the stuff affects precipitation. Precipitation is influenced by topography among other things. Why don’t we talk about lake effects snow? It’s a phenomenon that occurs anywhere that you have a large lake that doesn’t freeze and has cold air flowing over it., mostly the Northern Hemisphere. Like the great lakes in the United States. What happens is that cold arctic air blows across the lake from the north in winter. And as the air crosses the lake, the lower layer is warmed by the lake water which is much warmer than the arctic air. And as this layer is warmed and picks up moisture it becomes lighter than the air above it. So, it starts to rise right. And clouds begin to form. When the air gets close to the shore. It’s slowed down by the land, and starts pile up. So, it rises even faster because it has nowhere else to go. That’s where topography comes into the picture. And it snows because as the air rises, it cools off and loses its capacity to hold water vapor. That’s right. Ok, thanks.