The melting of the polar ice caps has direct effects on global weather patterns.

1. Disrupted Ocean Currents: The freezing and thawing cycles of water contribute to the rise and decline of temperatures in the earth’s oceans which in turn may destroy some of the ocean currents including the Gulf stream. Ocean currents help to circulate air around the globe and prevent certain regions from becoming extremely hot or cold causing a change in climate disruption such as extreme heat waves, or major flooding.

2. Sea Level Rise: The Greenland and Antarctic ice sheets contain vast amounts of fresh water that melted could cause the sea level to rise which in turn causes coastal areas to erode and inundate without considering the impact on the economy in those regions. Furthermore, this would lead to a change in behavioral tendencies of people within those regions and exacerbate extreme normal occurrences.

3. Altered Circulation in the Atmosphere: The effect of ice thawing is felt on the pressure and temperature of the atmosphere, which then interrupts the normal flow of the wind including the jet streams. In most cases this kind of circulation causes many storms, which are also stronger than usual and occur more frequently.
To sum it up, no matter how tenuous the links between the melting of polar ice and the earth’s magnetic field, the secondary repercussions on global weathering are quite elementary. Polar ice melt, as it seems, is a very intricate concern dealing with a lot of factors that govern the composition and the behaviour of climate and ecosystems across the globe.