Winds FL410 - FL510 over the Pacific
I was wondering about the usual winds at these levels between YSSY and KLAX and trying to settle an argument. ATPL met notes state that above the tropapause the winds generally die off. Is that true in real life, or is there still a stronger prevailing westerly flow ablove FL410. Also understood is that the tropopause gets higher as you get closer to the equator.
Basis for the discusion is about the Citation CJ3 for trans pacific ops. sector lengths would be right on the range limit. Particualar HNL - LAX. There for the requirement to to find out abot the winds.
Cheers