Thank you, found it.
Here:
http://en.wikipedia.org/wiki/Atmospheric_escape
So, under normal circumstances the Earth is loosing about nine and a half billion kilograms of hydrogen every hundred years.
Is there any data on how much the upper atmosphere nuclear explosions increased this loss?
It also indicates that:
“Recent models indicate that stripping by solar wind accounts for less than 1/3 of total non-thermal loss processes.”