NSF 20-022 Frequently Asked Questions (FAQs) for Navigating the New Arctic, FY 2020 have released!
https://www.nsf.gov/pubs/2020/nsf20022/nsf20022.jsp
NSF 20-514 Navigating the New Arctic solicitation:
https://www.nsf.gov/pubs/2020/nsf20514/nsf20514.htm
More about NNA including their Office Hours Series: