Premium
Improving climatic signal representation in tropical ice cores: A case study from the Quelccaya Ice Cap, Peru
Author(s) -
Seimon Anton
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017191
Subject(s) - ice core , climatology , geology , el niño southern oscillation , tropical atlantic , sea surface temperature
The published ice core records for Quelccaya, Peru are shown to contain numerous errors in annual layer determination, introduced by the subjective methodology of the original analysis. A new methodology is presented that aligns and then merges d 18 O sample measurement profiles from the two Quelccaya cores. Absolute dating of the stratigraphy is established by comparison of prominent dust anomalies with documented earthquake reference‐marker events. The results demonstrate that the original sample measurements can register a comprehensive millennial climate history at sub‐annual resolution, thus also offering great potential for clearer interpretations of ENSO signals in tropical Andean ice cores.