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You seem to have JavaScript disabled on your browser. Since parts of this website are written in JavaScript, please renable it in order to have the best experience possible. Return to Main Menu Membership Join AMS Giving Donate Giving Levels and Funds Other Estate Gifts Give a Gift and Receive an Income Back Use Appreciated Assets Giving Stories AMS Giving Program Our Publications Journals Online Glossary of Meteorology Special Collections AMS Bookstore Publishing with AMS Attend a Meeting Participate Education Careers Stay Informed Get Involved Take Action Join a Community Give to AMS Sponsor AMS Events Resources from AMS Find an Expert Explore AMS Search Search Donate Your Account Hi, {{ memberDetails.firstName }}! My Account AMS Community AMS Code of Conduct New! Random Glossary Term Log out Log out Search --- AMS Meetings and COVID-19 With many of our meetings taking place weeks, and even months away, the AMS Meetings staff and volunteers continue moving forward with all AMS meetings as planned. Read More Who We Are The AMS is a global community committed to advancing weather, water, and climate science and service. Learn about AMS What We Do Science We advance understanding through high-impact, peer-reviewed scientific publications—including the Bulletin of the American Meteorological Society ( BAMS ). Community We bring together atmospheric scientists, professionals, students, authors, educators, researchers, and weather enthusiasts from around the world to share and collaborate. Advancement We offer certification programs, online learning, and other professional development opportunities so that our members can learn, grow, and succeed. Outreach We help educators and policy-makers bring the very latest weather, water, and climate science to bear on our nation’s future… and the world’s. Mary Glackin AMS President AMS provides access to the latest science as well as a community to help you advance. Mary Glackin, AMS President Get Involved Publish Your Work Educate with AMS Organize a Webinar Get Certified Volunteer for AMS Join a Local Chapter Attend a Meeting Join a vibrant community of almost 12,000 professionals, students, and enthusiasts who share knowledge, improve technology, and disseminate science to ensure that our planet can thrive. Join Today Donate to AMS Advertise with AMS Sponsor AMS Events Students & AMS Find an Expert Visit the Newsroom Awards and Honors AMS annually recognizes numerous individuals and organizations across the water, weather, and climate enterprise. If you know of a colleague or organization worthy of recognition, please submit a nomination. Read More Recorded Presentations Recorded presentations from the 100th Annual Meeting are now available! Read More Summer Policy Colloquium Do you want to put your science to work? Applications are now open for the 2020 AMS Summer Policy Colloquium in DC! Read More Glossary Term of the Week Polar Stratospheric Clouds (Abbreviated PSC; also called nacreous clouds, mother-of-pearl clouds; rarely, luminous clouds.) Clouds are cirrus or altocumulus lenticularis, and show very strong irisation similar to that of mother-of-pearl, especially when the sun is several degrees below the horizon. To the Glossary Stay Connected Subscribe to our Soundings newsletter or AMS on the Air podcast. Subscribe to newsletter Listen to AMS on the Air Get Social Real-time updates on contests, meetings, deadlines, and more. Facebook LinkedIn Twitter Instagram YouTube RSS -- Search Corporate Patron Follow us Facebook LinkedIn Twitter YouTube RSS -- Instagram RSS -- Soundings Our monthly newsletter for AMS members and friends. Subscribe Read the Latest Issue Learn more about AMS Mission of AMS News Awards & Honors Statements Annual Reports Organization and Administration Affiliate Sites Journals Online AMS Bookstore Archived Meeting Presentations Front Page Blog Living on the Real World Blog AMS Policy Forum Contact AMS Email & Phone Contacts amsinfo@ametsoc.org Phone: 617-227-2425 Fax: 617-742-8718 Headquarters: 45 Beacon Street Boston, MA 02108-3693 DC Office: 1200 New York Ave NW, Suite 500, Washington, DC 20005-3928 © Copyright 2020 American Meteorological Society | Privacy Policy and Disclaimer...