[Wonder Warthog]

"Earth’s magnetic field is caused by currents in the liquid iron outer core, which in turn are caused by the Coriolis effect of the earth’s spin, similar to how hurricanes are caused by winds moving north or south, experiencing different rotational speeds. Currents in an electrically conducting fluid are capable of retaining a magnetic field according to the dynamo theory."

True...but that same conducting medium is also moving within the sun's field, therefore it too must generate currents in said conducting medium...a mechanism that allows for direct transfer of solar energy into the earth's energy balance that does not involve photons. The cause and required effect are basic simple physics, but how does it cascade through the complexity of the earths ecosystem.

[Telepathic Intruder]

For magnetic dipoles like the sun, field strength decreases as the inverse cube of the distance. This means that the sun’s magnetic field is extremely weak, almost nonexistent, at earth’s distance. Whatever effect it has on earth is negligible.