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.
Long-term trends in the bulk δ15N of recent and fossil (pre-AD 1900) Northeast Channel corals. Fossil corals were sampled at approximately annual resolution, and dated with conventional 14C and 210Pb dating (SI Text); horizontal error bars integrate both dating error and specimen life-span. Vertical error bars and gray shaded region represent 95% confidence intervals. Note break in x-axis scale.
