When you're flying from the US to Asia (or the other way) over the pacific, do you have there such variable...

Question

..... routes as you have when flying over the Atlantic (the so called NAT tracks), which are changed daily because of jetstreams?

Answer 1

No. And the NAT tracks are changed with the north south movement of the pacific high pressure system, not the jet stream. This allows for the possibility of tail winds in both dirictions because of the anticyclonic rotation around a high pressure system.