QAnalySeries – a cross-platform time series tuning and analysis tool

Section: Age Modelsupporting

confidence: 64%

“…For core MD99‐2331, we tuned the %CaCO 3 record (Gouzy et al., 2004) to the core MD95‐2042 XRF‐%CaCO 3 record on SpeleoAge. We manually tuned the records with the QAnalySeries software version 1.4.2 (Kotov & Pälike, 2018) that reimplements the major functionality of the AnalySeries software developed by Paillard et al. (1996).…”

Section: Methodsmentioning

confidence: 99%

The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160‐45 ka BP Period Off the Iberian Margin

Davtian

Bard

Darfeuil

et al. 2021

“…Time series analyses were conducted using the QAnalySeries (Kotov & Pälike, 2018) and the Arand software package (Howell, 2012). QAnalySeries was used to align the composite percent opal record to the global δ 18 O stack (Lisiecki & Raymo, 2005) (LR04).…”

Section: Approachmentioning

confidence: 99%

A 1 Million Year Record of Biogenic Silica in the Indian Ocean Sector of the Southern Ocean: Regional Versus Global Forcing of Primary Productivity

Kaiser

Billups

Bradtmiller

2021

The oceanic and atmospheric components of the global carbon cycle are directly linked through photosynthesis and the export of marine organic matter to the deep ocean, remineralization, and upwelling of respired carbon back into the atmosphere. The Antarctic Zone of the Southern Ocean, where deep waters upwell on the large scale, thus plays an important role in ocean-atmosphere CO 2 transfer and hence glacial to interglacial-scale climate change (e.g., Sigman & Boyle, 2000). As reviewed in detail recently by Sigman et al. (2021), several mechanisms affect the upper water column structure in this region and thereby CO 2 exchange including wind-driven upwelling and sea ice extent. In the former, changes in westerly wind strength or their position above the Antarctic Zone cause variations in the degree of upwelling of nutrient-rich deeper water (e.g.

“…In order to assess how much, if any, material had been lost from the top of the Kasten core and piston core during coring operations and reaffirm the continuity of the records, a composite depth section was generated between multi‐, Kasten, and piston cores at each location. MS was used to correlate the cores and generate composite depth using the QAnalyseries software (Kotov & Pälike, 2018). Tie points were visually picked so as to align the similar features between the MS records.…”

Section: Methodsmentioning

confidence: 99%

Controls Since the mid‐Pleistocene Transition on Sedimentation and Primary Productivity Downslope of Totten Glacier, East Antarctica

Holder

Duffy

Opdyke

et al. 2020

The rapidly thinning Totten Glacier on the Sabrina Coast, East Antarctica, is the primary drainage outlet for ice within the Aurora Subglacial Basin, which could destabilize under the current atmospheric warming trend. There is growing need for direct geological evidence from the Sabrina Coast to frame late twentieth century Totten melting in the context of past warm climate analogs. Addressing this need, sediment archives were recovered from two sites on the Sabrina Coast slope and rise that record changes in terrigenous sedimentation and primary productivity in the region over glacial cycles since the mid‐Pleistocene transition (MPT). This research presents physical properties, grain size, diatom abundance and assemblages, and geochemical analysis from the two sites to determine how the processes that control sedimentation change between glacial and interglacial phases. The stratigraphic sequences in both cores record cyclic variations in physical properties and diatom abundances, which radiocarbon and biostratigraphic chronologies reveal as 100 Kyr glacial‐interglacial cyclicity. During glacials, terrigenous sediment deposition is enhanced by advanced grounded ice on the shelf, while primary productivity is restricted due to permanent summer sea ice extending past the continental slope. During interglacials, pelagic sedimentation suggests high surface productivity associated with contractions of regional sea ice cover. Comparison with post‐MPT slope records from Wilkes Land and the Amundsen Sea shows that this pattern is consistent in slope sediments around the margin. The higher‐amplitude variations in Antarctic ice volume and sea ice extent post‐MPT ensure that these signals are pervasive around the Antarctic margin.