https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Evidence of thermophilisation and elevation-dependent warming during the Last Interglacial in the Italian Alps https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44651 Wed 19 Oct 2022 09:56:34 AEDT ]]> The influences of hydrology on the radiogenic and stable carbon isotope composition of cave drip water, Grotta di Ernesto (Italy) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11345 Wed 11 Apr 2018 16:56:49 AEST ]]> Holocene climate variability in north-eastern Italy: potential influence of the NAO and solar activity recorded by speleothem data https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17138 Wed 11 Apr 2018 15:27:23 AEST ]]> Stable isotopes in caves over altitudinal gradients: fractionation behaviour and inferences for speleothem sensitivity to climate change https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17137 13C enrichment at high altitudes (colder temperatures) and slow drip rates. The results obtained support modelling and laboratory cave analogue experiments that indicate temperature, drip rate, pCO2 and supersaturation are important factors controlling stable isotope fractionation, but also stress the significance of ventilation and evaporation in the cave environment. It is proposed that the effects on stable isotope ratios observed along the altitudinal gradient can be analogues for glacial to interglacial temperature changes in regions which were extensively glaciated in the past.]]> Wed 11 Apr 2018 14:51:14 AEST ]]> North Atlantic storm track changes during the Last Glacial Maximum recorded by alpine speleothems https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17140 Wed 11 Apr 2018 13:06:31 AEST ]]> A re-evaluation of the palaeoclimatic significance of phosphorus variability in speleothems revealed by high-resolution synchrotron micro XRF mapping https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17139 p) rather than the thermodynamic partition coefficient (Kp) to account for the presence of crystalline phosphate inclusions. SKp describes P enrichment in speleothems regardless of the process, as similar mechanisms of phosphate co-precipitation may be in operation in biotic and abiotic conditions. The most important implication of our study is that variability in P concentration may be related to diverse processes which can be recognized through petrographic observations and chemical mapping. In particular, there may not be a direct relation between an increase in P concentration and seasonal infiltration as has been found in some previous studies, especially if the source of this element is not the labile phosphate released through leaching during seasonal vegetation dieback in temperate climates.]]> Wed 11 Apr 2018 10:30:22 AEST ]]> Increasing Australian-Indonesian monsoon rainfall linked to early Holocene sea-level rise https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:6875 Tue 19 May 2020 10:48:38 AEST ]]> Climate variability on the Adriatic seaboard during the last glacial inception and MIS 5c from Frasassi Cave stalagmite record https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36369 Thu 02 Apr 2020 13:48:31 AEDT ]]> Karst https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:11437 Sat 24 Mar 2018 08:14:36 AEDT ]]> Speleothems as sensitive recorders of volcanic eruptions - the Bronze Age Minoan eruption recorded in a stalagmite from Turkey https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21142 Sat 24 Mar 2018 08:00:19 AEDT ]]> Regional climate variability and ecosystem responses to the last deglaciation in the northern hemisphere from stable isotope data and calcite fabrics in two northern Adriatic stalagmites https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:19954 Sat 24 Mar 2018 07:58:33 AEDT ]]> Holocene glacier history from alpine speleothems, Milchbach cave, Switzerland https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17998 Sat 24 Mar 2018 07:56:35 AEDT ]]> Vertical distribution of charcoal in a sandy soil: evidence from DRIFT spectra and field emission scanning electron microscopy https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18567 Sat 24 Mar 2018 07:50:09 AEDT ]]> A 53 year seasonally resolved oxygen and carbon isotope record from a modern Gibraltar speleothem: reconstructed drip water and relationship to local precipitation https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:5010 Sat 24 Mar 2018 07:44:12 AEDT ]]> Genesis and microstratigraphy of calcite coralloids analysed by high resolution imaging and petrography https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30181 Sat 24 Mar 2018 07:41:33 AEDT ]]> Investigating the hydrological significance of stalagmite geochemistry (Mg, Sr) using Sr isotope and particulate element records across the late glacial-to-holocene transition https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30185 c parameter, is controlled by water–rock interaction, with higher and lower Mgc during dry and wet phases, respectively. This is thought to reflect incongruent dissolution of Mg-rich phases. Correction of Sr concentrations for contributions from airborne exogenic Sr, based on 87Sr/86Sr ratios, yields the bedrock-only contribution (Src). Src variation in stalagmite calcite is influenced by speleothem growth rate and by variation of the calcite-water Sr partitioning in wet and dry phases, and only to a minor extent by incongruent dissolution of Mg-rich phases. Concentration profiles for Mgc and Srcg (corrected for growth rate effects) show inverse correlations and are inferred to show hydrological significance which is captured in a hydrological index, HI. We suggest HI provides robust information on water–rock interaction related to hydrological changes and can be utilized in both wet and semi-arid environments, provided the corrections for soil Mg and exogenic Sr can be applied with confidence. Application of the HI index allows correction of Grotta Savi oxygen isotope data, to yield a δ18Oc time series that shows when changes in moisture sources and atmospheric reorganization, or changes in moisture amount, were significant. This is especially evident during the Younger Dryas (YD). The Savi record supports the concept of a two-phase YD, marked by an increase of moisture and stronger impact of Adriatic and Mediterranean Sea influences over the northern Adriatic region from 12.3 ka onwards. Then, a large-scale atmospheric reorganization and gradual northward shift of the Polar Front caused a progressive reduction of sea influence over the region from 12.1 ka, supporting the concept of a hemispheric change.]]> Sat 24 Mar 2018 07:41:31 AEDT ]]>