Because it takes circa 10.000 years for an ice age to gradually come to an end; but for a climate ripple (for example, the end of the Younger Dryas) the change in weather took, 25 years later, just one year, temperature wise.
PUSH vs POP. A stack is a data structure that is used in programming. There are two basic operations that can be performed on a stack to modify its contents, which are called PUSH and POP. The main difference between PUSH and POP is what they do with the stack. PUSH is used when you want to add more entries to a stack while POP is used to remove entries from it. A stack is so named because it places the individual data entries just like a stack of books.
Push and Pop. Usually, push and pop are defined as follows: 1  push You can push one or more registers, by setting the stack pointer to a smaller value (usually by subtracting 4 times the number of registers to be pushed on the stack) and copying the registers to the stack.