NCEAS supports Slack for chat rooms and Google+ Hangouts for instant messaging.
Slack is a persistent chat messaging app with dedicated channels for topics and projects. Fill out the simple Slack signup form with your email address to get started. Once you are connected, join one or more channels of interest, which include:
Login to GMail via your NCEAS G Suite for Education account and use the Google Hangouts app at the bottom left of the page. If your page is displaying Google Talk, click the link to switch it to Google+ Hangouts for voice and video features.