Reconstructing recent land–ocean changes in the Brazilian Southern Coast using sedimentary proxies and tracking airborne 210 Pb

Reconstructing nutrient fluxes (C,N,P) to the Santa Catarina Bay (SCB) during last century through high-resolution sedimentary proxies and 210 Pb dating. The fluxes and stable isotopes (δ 13 C, δ 15 N) showed clear relationship with population growth and silting of rivers. The SCB central zone experienced gradual change from mesotrophic towards eutrophic conditions while the littoral zone showed rapid change, since the 1960s, probably caused by channelization and posterior dredging of rivers. 210 Pb influx at sediment–water interface highest in the central zone pointed to 222 Rn transport by Hadley and Ferrel cells, suggesting that atmospheric supply was related to mid-latitudes of South Atlantic Central Waters.