JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


Handbooks

The Skeptics Handbook

Think it has been debunked? See here.

The Skeptics Handbook II

Climate Money Paper


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GoldNerds

The nerds have the numbers on precious metals investments on the ASX



Archives

Books

Giant double whirlpools in the ocean and the DIY ones you can make in your pool

How much don’t we know?

Giant pairs of whirlpools travel across the ocean for months in a bizarre pair.

These large paired whirlpools, hundreds of kilometers across, travel eastward at something like 10-20cm per second. This is one pair crossing from Tasmania to NewZealand. This was there in our satellite data but “invisible” til recently. As David Evans says “I wonder what else we are observing but not seeing?”

The pair of whirlpools called Modon E travelling eastward from Tasmania to NZ.

The ocean becomes connected at two distant points as the Modon-E whirlpool pair travels from Tasmania to NZ in 2010-2011

In the mini-pool version, these rolling whirlpools are connected in a U shape under water.

Wow. PhysicsGirl shows how to make these by pushing a plate through the water, and adding food coloring. Switch on your science nerd, show the kids! (send me your photos :- ))

The two vortexes spin in opposite directions but are connected as a pair underwater. This was created by PhysicsGirl using a plate in a pool and two different food colorings.

Twin giant ocean whirlpools travel for months winding their way across oceans

Peter Dockrill reports on an interview [...]