Weather modification means somehow, on a local or regional basis, to dramatically change the character of weather. It's not raining- changed to-it's now raining. Weather moderation means modestly changing the existing weather for a better, more beneficial condition. Its raining too much in a flood prone area- changed to- some of the excess rain is translocated to a drier area.
Many Western states now attempt weather modification with cloud seeding using silver iodide crystals or salt and smoke particles. The effectiveness is still under study. California, for example, uses cloud seeding in an attempt to increase snow in the Sierra Mountains. By definition, moisture in the atmosphere must be available and that moisture that comes down as rain is removed from the atmosphere. It's a dramatic change because without cloud seeding maybe that moisture would provide snow in the Utah mountains. In the West, stealing someone's water is bad juju .
On the other hand, if it's raining so much that Western coastal areas are in flood, somehow moving that excess rain to the high mountains as snow is termed moderation. Most of the rain that floods the coast is lost to the sea. So moving some of that excess moisture (as rain-runoff) from the coast to the high mountains (as snow-stored) is beneficial. It's raining-Moderation applied-it's still raining. No moisture is stolen from the atmospheric river.
The weather modification case is bad as moisture that could be shared or intercepted by other mountains of the West is "stolen" by the Sierra cloud seeding effort. The weather moderation case is beneficial in that it saves moisture that would otherwise flood to the sea and saves it as snow. My following post will discuss my moderation method and the evidence I have gathered to demonstrate that the method works.