# Rising sea level

If the entire world’s population jumped into the ocean at the same time totally submerging themselves, sea level would rise by 0.0014mm, the thickness of a plastic bag. Here’s my logic.

The average male weighs 82kg; female 70kg. Assuming a body density the same as water (hence why we float, but only just), that gives us 1g/cm3, or respective body volumes of 0.082 and 0.070 cubic metres.

With 1.01 males per female and a world population of 6.6bn, we have 3,316,417,910 males and 3,283,582,090 females with combined body volumes of 502,686,567 cubic metres. The world’s oceans and seas occupy 361 million square kilometres of the world’s surface, so evenly applying the volume to that area gives you 0.0014mm.

Jump in on your tod, and the water level will rise by a fifth of the width of an atom’s nucleus.

Feel small?

5 Responses to “Rising sea level”

1. art vandelay on November 14th, 2007 21:44

Though for real fatties it might be a 1/4 of an atom’s nucleus.

Imagine the shame.

2. shahed on November 15th, 2007 07:41

It’d be interesting to factor in the rate of water displacement because I’m betting that China’s and India’s coasts will submerge faster than say that of Greenland’s what with the population ratios being 1:23460 for China and 1:20052 for India and all.

3. Dan on November 15th, 2007 20:08

The assumption is that we wait until the sea rights itself and that all of the displacement evens itself out. By which time everyone will be dead from holding their breath. So, where can I get 6.6 billion snorkels?

4. IPCC on November 17th, 2007 07:23

I would not worry about that, turns out the the north pole will melt over summer so plastic bags are academic really.

5. Jump In on November 19th, 2007 02:37

You have far to much time on your hands. I think you should tie a cement block to each of your feet and jump in somewhere deep.