Sunspots, solar flares, and seasonal shifts in radiation received by the northern and southern hemispheres due to the tilt of the earth's axis, all cause significant changes in these fields.
(seasonal shifts in radiation; received; by the northern and southern hemispheres; due to the tilt of the earth's axis) (Sunspots, solar flares, and seasonal shifts in radiation; cause; significant changes in these fields)
seasonal shifts in radiation Sunspots, solar flares, and seasonal shifts in radiation
received cause
by the northern and southern hemispheres due to the tilt of the earth's axis
significant changes in these fields