Samples of bryophytes or wood were extracted for AMS radiocarbon dates and calibrated for calendar years BP (cal yr BP); see details in Vitt & House (2021). 4.3. Cellulose extraction and isotope analysis Water samples were analyzed for δ18O and δ2H by isotope ratio mass spectrometry using...
According to the crop phenological calendar in Northeast China, crops were ripe once a year due to the winter being cold and the ground being covered with snow. The growing season of crops was concentrated from May to October according to agricultural phenology in the study area. In the first...
Subsequent to this, we assigned calendar years using the cross-dating methodology, verifying alignments between extremely narrow and wide rings [24]. The quality control of cross-dating was conducted using the COFECHA program [25], while the generation of a standard chronology was facilitated ...
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Radiocarbon dates were calibrated and converted into calendar dates with the OxCal v4.4 program for Windows [77] and the Southern Hemisphere terrestrial dataset SHCal20 [78]. 2.4. Stable Isotope Analysis A series of wood aliquots of approximately 0.5–1 × 10−3 m width were separated along ...
This refers to the discrepancy between the calendar age and that of the organisms or materials found within the lake sediment owing to the mixing of water with varying residence times and the incorporation of older carbon from the catchment area [11,12]. Additionally, conflicting proxies within ...
However, global climate change leads to dramatic changes in the hydrological regime of rivers including late freezing and early melting, which cause changes in the fishing calendar and the availability of natural storage reservoirs [6]. Decreasing consumption of traditional foods associated with a ...