Mr. Obvious wrote:What it all means is that all of these "conversions" are not scientific and it is not possible to give an exact number
they are as "scientific" as anywhere you will find on web
they combine the ncaa app which is gold-standard tool for altitude conversions anywhere on web, but clearly they only seem to convert for aerobic handicap & not include less air-resistance of altitude
therfore combine with wind-altitude calcultor which is gold standard for it's field
combining both gives figures many experienced observers woud expect for an altitude conversion
Clearly a 27'11 at A is an outstanding mark and likely worth something better than that at sea level. How much is up to some interpretation and speculation.
for kenyans mostly all brought up at altitude, i doubt for 10k the final number is more than +/- 5s out
before someone brings up the interminable paul kipsiele who is always claimed can't run at altitude, let me point out his nairobi best is 8'13.98 for 4th in a race won by by kemboi in 8'13.56 in trials for '08 games
he lost a mass sprint finish not ground into the dirt by the altitude
no one makes the pace in a kenyan trials race over 3ksc so it always comes down to the sprint which is his real weakness not ability to run at altitude
the nairobi best ever is 8'11.73 by brimin in '12