relative absorption band depth from 660 to 670 nm
Concentration of chlorophyll a and its derivatives
; paleoData_variableName changed - was originally Trough (R660;670) (Total chlorin1); paleoData_variableName changed - was originally RABD660_670
annual T signal is negative (note erratum to original paper). Relative absorption band depth from 660 to 670 nm is a proxy for concentration of chlorophyll a and its derivatives. Note data gap.