Global Water Volume

The volume of a comet needed to deliver sufficient water to a sphere (Earth) in order to leave an estimated 71% sea distributed across its surface can be calculated.

The volume of the Earth excluding any water is approximated by:

4/3πr³

π = 3.142

• This assumes the Earth is a perfect sphere rather than an oblate spheroid

Earth volume = 1,083,206,917,000 cubic km

• Earth Fact Sheet
• Moon Fact Sheet

• The radius of the Earth is an average of 6371km (volumetric mean)

• Assuming an average depth of 3.79km the volume of ocean seas will be:

1,085,141,211,000 cubic km

• The volume of water will be the difference between these two quantities:

1,934,294,000 cubic km

• The proportion of water to land is roughly 71:29, so the actual volume of water will equate to:

1,373,348,740 cubic km

1.37bn cubic km (approx)

Volume of Earth's Oceans

• The diameter of a comet (water source) necessary to deliver this quantity of water would need to be about 1378 km:

r³ = 3/4 * 1,370,000,000 * 1/π

Radius = 689 km

• Earth without water = 1,083,206,917,000 cubic km
• Earth covered with water = 1,085,141,211,000 cubic km
• Difference = 1,934,294,000 cubic km
• If land:water is approx 29:71 then

Water = 1,373,348,740 cubic km

• Radius = 689 km

Diameter = 1378 km

Arctic Ocean

Environmental concerns

Antarctica

• Ice-covered: 13,720,000 km²

The baseline water temperature and the associated volume of the oceans cannot be known. This is now speculated, but scaremongering for cynical (or other) reasons is unforgivable. Science must rid itself of being corrupted by political interference. It is also possible that the alleged rising temperature is returning to an earlier (lower) value before any global cooling happened that formed the ice in the first place. This operates in a similar principle to ice contained in a drink to keep it cool. The ice melts and so removes heat from the liquid (latent heat). The volume does not change. Ice contains trapped air (ice floats) and the volume of air causes the volume of solid water (ice) to be about 10% greater than liquid water. When ice melts the trapped air is released and the volume decreases. The melting-ice volume in the Antarctic has yet a long way to go before it is exhausted. And there will be no changes in the ocean depth.

Climate Change
Global Warming
Ice, Sea Volume And Finance
Nitrogen Dioxide: New Culprit 

The reality is there are some places that are unsafe in which to be. The change in climate will continue as a cyclical event.

Earth-Moon Relationship (Hypothetical)

Origin Of Earth's Moon

Polar Ice

Sidereal And Synodic Time