There is no scientific or documented phenomenon known as the "dust dowl effect". It's possible that you've encountered a misspelling or a term specific to a particular field or context.

Could you please provide more information or context about where you encountered this term? For example:

* Where did you read or hear about it? (e.g., a book, website, conversation)

* What was the context? (e.g., a scientific experiment, a historical event, a fictional story)

With more information, I might be able to help you understand what you're looking for.