POC measured on water bottle samples during John P. Tully cruise IOS_96-01

c=beamc-adjc, 1-m pathlength SeaTech transmissometer at 660nm data are reproducible to better than 0.001 in deep water. Clear water value for c is 0.364.参数c为光束衰减校正值（beamc-adjc），即采用1米光程的SeaTech透射仪在660纳米波长下采集的数据，其在深水中的可重现性优于0.001。纯净水体对应的c值为0.364。