| Title | Late Holocene precipitation variability recorded in the sediments of Reloncaví Fjord (41°S, 72°W), Chile |
| Publication Type | Journal Article |
| Year of Publication | 2015 |
| Authors | Rebolledo L, Lange CB, Bertrand S, Muñoz P, Salamanca M, Lazo P, Iriarte JL, Vargas G, Pantoja S, Dezileau L |
| Journal | Quaternary Research |
| Volume | 84 |
| Pagination | 21-36 |
| Date Published | Jul |
| ISSN | 0033-5894 |
| Accession Number | WOS:000358816900003 |
| Abstract | We present reconstructions of late Holocene changes in the source of organic matter and siliceous export production in the Relocanví Fjord (41°S, 72°W), Northern Chilean Patagonia, based on organic carbon content, δ13Corg, N/C ratio, diatom assemblages and biogenic silica contents from three sediment cores. The age models are based on a combination of 210Pb profiles, AMS 14C dating, and on the first occurrence of the diatom Rhizosolenia setigera f. pungens, as a stratigraphic marker in the fjords. The cores span the last 300 to 700 yr. Diatoms dominate the siliceous assemblages in the three cores (98% on average). Our results suggest that precipitation seasonality in the region of Reloncaví was high in CE 1300–1400 and CE 1700–1850, with a clear decreasing trend since CE 1850. The latter trend is in agreement with instrumental records and tree-ring reconstructions. These fluctuations seem to be associated with the Southern Annular Mode (SAM). |
| DOI | 10.1016/j.yqres.2015.05.006 |
