@article{fdi:010083966,
  title = {{C}limatic controls on a {H}olocene mercury stable isotope sediment record of {L}ake {T}iticaca},
  author = {{J}iskra, {M}. and {G}u{\'e}dron, {S}t{\'e}phane and {T}olu, {J}. and {F}ritz, {S}. {C}. and {B}aker, {P}. {A}. and {S}onke, {J}. {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ercury ({H}g) records in sediment archives inform past patterns of {H}g deposition and the anthropogenic contribution to global {H}g cycling. {N}atural climate variations complicate the interpretation of past {H}g accumulation rates ({H}g{AR}s), warranting additional research. {H}ere, we investigated {H}g stable isotopes in a ca. 8k year-long sediment core of {L}ake {T}iticaca and combined isotopic data with organic biomarkers and biogeochemical measurements. {A} wet period in the early {H}olocene (8000-7300 {BP}) induced strong watershed erosion, leading to a high {H}g{AR} (20.2 +/- 6.9 mu g m(-2) year(-1)), which exceeded the 20th century {H}g{AR} (8.4 +/- 1.0 mu g m(-2) year(-1)). {G}eogenic {H}g input dominated during the early {H}olocene (f(geog) = 79%) and played a minor role during the mid- to late {H}olocene (4500 {BP} to present; f(geog) = 20%) when atmospheric {H}g deposition dominated. {S}ediment {D}elta {H}g-200 values and the absence of terrestrial lignin biomarkers suggest that direct lake uptake of atmospheric {H}g(0), and subsequent algal scavenging of lake {H}g, represented an important atmospheric deposition pathway (42%) during the mid- to late {H}olocene. {D}uring wet episodes of the late {H}olocene (2400 {BP} to present), atmospheric {H}g({II}) deposition was the dominant source of lake sediment {H}g (up to 82%). {S}ediment {D}elta {H}g-199 values suggest that photochemical reduction and re-emission of {H}g(0) occurred from the lake surface. {H}g stable isotopes show promise as proxies for understanding the history of {H}g sources and transformations and help to disentangle anthropogenic and climate factors influencing {H}g{AR} observed in sediment archives.},
  keywords = {{H}g stable isotopes ; climate variations ; {H}olocene ; atmospheric ; deposition ; erosion ; sediment archive ; {BOLIVIE} ; {PEROU} ; {TITICACA} {LAC}},
  booktitle = {},
  journal = {{ACS} {E}arth and {S}pace {C}hemistry},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[12 p.]},
  ISSN = {2472-3452},
  year = {2022},
  DOI = {10.1021/acsearthspacechem.1c00304},
  URL = {https://www.documentation.ird.fr/hor/fdi:010083966},
}