Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Observations of temperatures at 70 (±2) mbar (≈18 km) during ozonesonde ascents in the 1990s for Resolute and Ny Alesund in the Arctic as compared with Neumayer and South Pole in the Antarctic. The portions of the year when temperatures fell below −80°C (the conditions for which ozone depletion chemistry is expected to be most rapid) are also shown.
