I What is the average annual accumulation of cosmic dust on Earth?

[swampwiz]

By "accumulation", I mean depth at the Earth's surface (i.e., whatever volume it is would be divided up the surface area). This dust would be from anything (e.g., meteors, stardust, etc.), but would only count stuff that ends up as dust (i.e., no gas or liquid). I guess a follow-on question would be how much water collects.

 

[PeroK]

Have you tried an internet search?

 

[Ibix]

The mass is 4x10⁷kg/year according to this paper (which is linked off the Wikipedia page on cosmic dust, so you should have been able to find easily). The Earth's surface area is something like 5×10¹⁴m², so around 10^-7kg/m²/year. Typical density of rock is around 3-5×10³kg/m³, for a depth of less than 10^-10m/year. On that scale, what fraction is or isn't rock really isn't important.

 

[Vanadium 50]

Have you tried an internet search?

It's swampwiz. So no.

We should be honored to always be his first stop.