Stable Oxygen Isotope Records (δ18O) of a High-Andean Cushion Peatland in NW Argentina (24° S) Imply South American Summer Monsoon Related Moisture Changes During the Late Holocene

Kock, Sebastian T.; Schittek, Karsten; Wissel, Holger; Vos, Heinz; Ohlendorf, Christian; Schäbitz, Frank; Lupo, Liliana Concepción; Kulemeyer, Julio José; Lücke, Andreas

doi:10.3389/feart.2019.00045

Cited by 15 publications

(26 citation statements)

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“…(c) NDJF temperature anomalies (°C) of Nevado Illimani reconstructed from ammonium concentrations (16°S, Bolivia; Kellerhals et al, ). (d) δ 18 O cell (‰ vs. VSMOW) of the Cerro Tuzgle peatland (24°S, Argentina; Kock, Schittek, Wissel, et al, ). (e) δ 18 O cell (‰ vs. VSMOW) of the Lagunillas peatland (27°S, Chile; Kock, Schittek, Mächtle, et al, ), bold and dotted lines indicate the LOESS interpolation ( f = 0.2) based on Montañez et al ().…”

Section: Resultsmentioning

confidence: 99%

“…Master core halves from LP and CTP were cut into 1‐cm slices and sampled for radiocarbon dating and cellulose extraction. Bulk peat samples were used for radiocarbon dating by Accelerator Mass Spectrometry (Poznan Radiocarbon Laboratory, Poznan, Poland) (Kock, Schittek, Wissel, et al, ; Schittek et al, ). Radiocarbon ages were calibrated to calendar ages (cal.…”

Section: Methodsmentioning

confidence: 99%

“…Monthly calculated δ 18 O precipitation isoscape data (Bowen, ; Bowen et al, ) of the study sites (Table S1) show most negative values occurring in February, the peak of the SASM‐cycle. Taken together with regional climate station data (e.g., Mina Concordia (see Kock, Schittek, Wissel, et al, ), this suggests that seasonal precipitation amount and isotopic composition are linked locally, equivalent to the oxygen isotope‐precipitation amount effect derived from Global Network of Isotopes in Precipitation station data (The International Atomic Energy Agency/World Meteorological Organization, ).…”

Section: Study Regionmentioning

confidence: 99%

“…The Cerro Tuzgle peatland (CTP; 24°09′S, 66°24′W, 4,350 m a.s.l. ; Kock, Schittek, Wissel, et al, ) and Lagunillas peatland (LP; 27°12′S, 69°17′W, 3,823 m a.s.l. ; Kock, Schittek, Mächtle, et al, ) are both located on the Puna Plateau (Figure a).…”

Section: Study Regionmentioning

confidence: 99%

“…For the southern central Andes, a connection between δ 18 O cellulose values and moisture conditions of a cushion peatland was recently shown and related, similar as above described, to the SASM‐variation (Kock, Schittek, Wissel, et al, ). Here, we further show that the δ 18 O cell pattern recorded in cushion peatland archives is (1) regionally uniform for the Puna Plateau between 24° and 27°S during the last 1,800 years and (2) strongly connected to centennial‐scale SASM‐dynamics.…”

Section: Introductionmentioning

confidence: 99%

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Multi‐Centennial‐Scale Variations of South American Summer Monsoon Intensity in the Southern Central Andes (24–27°S) During the Late Holocene

Kock

Schittek

Mächtle

et al. 2020

Geophysical Research Letters

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Oxygen isotope records of cushion‐plant peat cellulose from the southern central Andes capture evidence for significant environmental changes. We observe that the δ18Ocell peatland record from Cerro Tuzgle (24°S) is in high conformity with the respective Lagunillas peatland record (27°S). During the late Holocene, two significant fluctuations occurred and are interpreted as regional moisture signals with increased precipitation amounts indicated during multi‐centennial phases from 1,530 to 1,270 cal. yr BP and from 470 to 70 cal. yr BP. These fluctuations can be best explained by changes in the strength of the South American summer monsoon (SASM). This interpretation is further supported by consistency with northern Andean paleoclimate records (10–13°S) and very high correlation (R2 = 0.76) with the Southern Oscillation Index. The congruent precipitation signals suggest the persistent climatic control of the SASM‐strength in this latitudinal band during the last 1,800 years.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Study Regionmentioning

confidence: 99%

Section: Study Regionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi‐Centennial‐Scale Variations of South American Summer Monsoon Intensity in the Southern Central Andes (24–27°S) During the Late Holocene

Kock

Schittek

Mächtle

et al. 2020

Geophysical Research Letters

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Soils in ancient irrigated agricultural terraces in the Atacama Desert, Chile

et al. 2021

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The Atacama Desert is among the driest places on Earth, yet ancient agricultural systems are present in the region. Here, we present a study of terraced agricultural soils in the high‐altitude eastern margin of the Atacama Desert in northern Chile, mainly dating to the Late Intermediate Period (ca. 950–1400 AD) and Inka period (ca. 1400–1536 AD). Terraced fields were compartmentalized to distribute limited irrigation water originating mainly from springs. Natural soils used for agriculture are mostly Aridisols developed on Pleistocene alluvial fan terraces and hillslopes underlain by volcanic bedrock. One research objective is to evaluate long‐term soil change from agriculture. In this hyperarid climate, agriculture is only possible with irrigation, so natural soils on the same geomorphic surface adjacent to irrigated soils provide baseline data for assessing anthropogenic soil change. Data from soil profiles and surface transects indicate intentional soil change through terracing, removal of soil rock fragments, and probable fertilization. Agricultural soils have anthropogenic horizons ranging from 16 to 54 cm thick. Most agricultural soils have higher phosphorus levels, suggesting enrichment from fertilization. Changes in soil organic carbon and nitrogen are also evident. Unintentional anthropogenic soil change resulted from CaCO3 input through irrigation with calcareous spring water. Initial studies suggest that agriculture here was sustainable in the sense of conserving soils, and maintaining and possibly improving soil productivity over centuries.

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Evaluating the isotopic composition of leaf organic compounds in fog-dependent Tillandsia landbeckii across the coastal Atacama Desert: Implications for hydroclimate reconstructions at the dry limit

Jaeschke,

Böhm,

Schween

et al. 2024

Global and Planetary Change

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Stable Oxygen Isotope Records (δ18O) of a High-Andean Cushion Peatland in NW Argentina (24° S) Imply South American Summer Monsoon Related Moisture Changes During the Late Holocene

Abstract: 600 to 130 cal. yr BP. Temporal changes in the match to South American Summer Monsoon (SASM) reconstructions suggest impacts of other large-scale atmospheric variability modes or a different SASM expression at our southerly location.

Cited by 15 publications

References 71 publications

Multi‐Centennial‐Scale Variations of South American Summer Monsoon Intensity in the Southern Central Andes (24–27°S) During the Late Holocene

Multi‐Centennial‐Scale Variations of South American Summer Monsoon Intensity in the Southern Central Andes (24–27°S) During the Late Holocene

Soils in ancient irrigated agricultural terraces in the Atacama Desert, Chile

Evaluating the isotopic composition of leaf organic compounds in fog-dependent Tillandsia landbeckii across the coastal Atacama Desert: Implications for hydroclimate reconstructions at the dry limit

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