A new study of a volcanic crater lake in Vietnam’s central highlands analyzes sediment cores from the Biển Hồ maar. These geochemical and sedimentological analyses show increases in sedimentation rates during the time of US military activities in the 1960s-70s, a decrease in sedimentation correlating with reforestation projects around the rim during the 1990s, and a drop in nutrients when a concrete sill was installed to limit water exchange ten years ago. Set alongside other data, this record will also provide calibration for producing longer records from the maar. Read the full study here.
Climate History Network