Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
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A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The dotted line shows the variation in the average temperature measured during the recording. The sun and moon symbols indicate the day and night periods. E, emersion; PE, partially emersed; I, immersion; PI, partially immersed.
