As scientists, we'd like to think it's very important. You can't go back and measure yesterday's atmosphere, so the first question is: how long is the data record to which you're referring? We at PEARL have been measuring various atmospheric parameters since 2005. Before us, it was Environment Canada, through Astro back to 1993, and before that through the Eureka weather station back to 1947. Therefore, as you heard in the previous discussion, data is always very important. It's the only way you can know where you've been in order to judge current events and to make a prediction of where you're going. Does that answer your question?
On May 8th, 2018. See this statement in context.