Fig. 3From: High-resolution mapping and time-series measurements of 222Rn concentrations and biogeochemical properties related to submarine groundwater discharge along the coast of Obama Bay, a semi-enclosed sea in JapanDistributions of 222Rn (dpm/L) in a March, b June, c July, and d September, determined by monitoring the coastline from a boat. All the data in March are shown in the same panel, although each datum was obtained on a different dayBack to article page