This level is free of local wind and topographic effects (such as sea breezes, downslope winds etc). Some charts show geopotential height, which approximates the actual height of a pressure surface ...

confirming the ability to deliver a safe, modern, fully mechanised copper mine. o Undiscounted free cash flows of AUD219 million (ZAR2,744 million), pre-tax; o Peak funding requirements of AUD103 ...