Mouse you are trying to go same route as climate alarmist. Grand solar minimum is like whilibird said a reduction in sun activity. This causes cooling due to less plasma hitting planet. The added danger is migrating pole which in right sequence will drop or severely reduce our natural emf shielding by changing strength and location of non coverage
The ice age and cooling happens over time each year it’s not a instant freeze like the woolly mammoth in Russia … that is attributed to polar shift. As the PLASMA streams slow from sun al less cme and filaments happen as sun surface is cooling it cools our solar system think turning down furnace. You ask why Australia is hot one place being hot for a short period is proof of non grand solar minium? When you cool down anything it’s not all equal and at same time look at a 5 year world tempreture…. the use of antarctic ice sheet is false info… look at the volcanic action under the sheet it’s available and then tell me it’s from co2 loosing g the ice sheet.
Is grand solar minimum 100 proven no but we are seeing slow down of the sun surface activity.