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.
Seasonal trends of June–August (JJA), September–November (SON), December–February (DJF), and March–May (MAM) mean Arctic LSAT for 1908–1942. See legends inside the panel for meaning of symbols and lines. Error bars for simulated and 20CRv2c trends indicate the two-tailed 95% confidence interval for their ensemble mean.
