@JimmyB You got it! Those are some proxy records we can use as stand-ins for climate records. I use tree-rings to look back on past droughts going back 2,000+ yrs. Ice cores go back much further 800,000 to 1 million+ yrs. Sediment goes back 10,000 to 100,000+ yrs but the temporal resolution of ice and sediment is not annual. The annual or even subannual (trees actually put on two types of rings a year) is why I like dendrochronology so much. I mostly teach now and try to publish with students
