Helen L Neil
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View article: Little Ice Age effects on Southern Ocean thermohaline circulation
Little Ice Age effects on Southern Ocean thermohaline circulation Open
The Little Ice Age (LIA) was one of the strongest climate perturbations in the last millennium, with widespread albeit asynchronous periods of cooling globally1. Its effects on oceanic properties and thermohaline circulation have been ques…
View article: Maieretal_NZJG_SeafloorPockmarksSouthWestland_SupplementaryFiles
Maieretal_NZJG_SeafloorPockmarksSouthWestland_SupplementaryFiles Open
Supplementary Files including data from Maier, Orpin and Neil journal article "Seafloor pockmarks on the South Westland margin of the South Island/Te Waipounamu, Aotearoa New Zealand" in New Zealand Journal of Geology and Geophysics Table …
View article: What We Do in the Shallows: Natural and Anthropogenic Seafloor Geomorphologies in a Drowned River Valley, New Zealand
What We Do in the Shallows: Natural and Anthropogenic Seafloor Geomorphologies in a Drowned River Valley, New Zealand Open
© Copyright © 2020 Watson, Neil, Ribó, Lamarche, Strachan, MacKay, Wilcox, Kane, Orpin, Nodder, Pallentin and Steinmetz. The shallow marine environment represents a region of high biological productivity, ecological diversity, and complex …
View article: Focused fluid seepage related to variations in accretionary wedge structure, Hikurangi margin, New Zealand
Focused fluid seepage related to variations in accretionary wedge structure, Hikurangi margin, New Zealand Open
Hydrogeological processes influence the morphology, mechanical behavior, and evolution of subduction margins. Fluid supply, release, migration, and drainage control fluid pressure and collectively govern the stress state, which varies betw…
View article: CO<sub>2</sub> Release From Pockmarks on the Chatham Rise‐Bounty Trough at the Glacial Termination
CO<sub>2</sub> Release From Pockmarks on the Chatham Rise‐Bounty Trough at the Glacial Termination Open
Seafloor pockmarks of varying size occur over an area of 50,000 km 2 on the Chatham Rise, Canterbury Shelf and Inner Bounty Trough, New Zealand. The pockmarks are concentrated above the flat‐subducted Hikurangi Plateau. Echosounder data id…
View article: Atmosphere‐Ocean CO<sub>2</sub> Exchange Across the Last Deglaciation From the Boron Isotope Proxy
Atmosphere‐Ocean CO<sub>2</sub> Exchange Across the Last Deglaciation From the Boron Isotope Proxy Open
Identifying processes within the Earth System that have modulated atmospheric pCO 2 during each glacial cycle of the late Pleistocene stands as one of the grand challenges in climate science. The growing array of surface ocean pH estimates…
View article: Modern, Preindustrial, and Past (Last 25 ka) Carbon Isotopic (δ<sup>13</sup>C) Variability in the Surface Waters of the Southwest Pacific
Modern, Preindustrial, and Past (Last 25 ka) Carbon Isotopic (δ<sup>13</sup>C) Variability in the Surface Waters of the Southwest Pacific Open
Carbon stable isotopes (δ 13 C) in modern seawater samples and planktic foraminifera Globigerina bulloides from core top and downcore sediments are used to estimate the distribution of δ 13 C of dissolved inorganic carbon (DIC) in the surf…
View article: Modern, pre-industrial and past (last 25 ka) carbon isotopic (δ13C) variability in the surface waters of the southwest Pacific
Modern, pre-industrial and past (last 25 ka) carbon isotopic (δ13C) variability in the surface waters of the southwest Pacific Open
Carbon stable isotopes of Globigerina bulloides from 68 core tops and 19 cores (published and unpublished) were compiled for the SW Pacific to determine latitudinal changes in d13CG.bulloides for the Holocene and changes since the glacial …
View article: Pore water geochemistry of sediment core PC83-1 at Chatham Rise, Canterbury Shelf and Inner Bounty Trough, New Zealand
Pore water geochemistry of sediment core PC83-1 at Chatham Rise, Canterbury Shelf and Inner Bounty Trough, New Zealand Open
Pore water geochemistry of sediment core PC75-2 at Chatham Rise, Canterbury Shelf and Inner Bounty Trough, New Zealand
View article: Deglacial isotope analysis from sediment core PC75 and PC83 and a global sea surface pH/pCO2 composite
Deglacial isotope analysis from sediment core PC75 and PC83 and a global sea surface pH/pCO2 composite Open
2 new deglacial planktic boron isotope records from the Southwest Pacific. pH/pCO2 calculated from 12 boron isotope records from the global ocean were compiled to determine the history of air-sea exchange of CO2 since the glacial (last 25k…
View article: Erosion of the Southern Alps of New Zealand during the last deglaciation
Erosion of the Southern Alps of New Zealand during the last deglaciation Open
During the Quaternary, periodic glaciations transformed mountain landscapes. However, characterizing the way in which mountain erosion changes between glacier- and river-dominated conditions has been elusive. Here, using samples from an of…
View article: Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand
Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand Open
The Southern Hemisphere westerly winds (SHWWs) play a major role in controlling wind-driven upwelling of Circumpolar Deep Water (CDW) and outgassing of CO2 in the Southern Ocean, on interannual to glacial–interglacial timescales. Despite t…
View article: Evidence for a Holocene Climatic Optimum in the southwest Pacific: A multiproxy study
Evidence for a Holocene Climatic Optimum in the southwest Pacific: A multiproxy study Open
The early Holocene sea surface temperature (SST) gradient across the subtropical front (STF) to the east of New Zealand was ~2°C (measured between core sites MD97‐2121 and MD97‐2120): considerably less than the ~6°C modern gradient between…
View article: Supplementary material to "Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand"
Supplementary material to "Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand" Open
Table S1.Water and particulate organic matter isotope results from CTD samples collected on 14PL001 and 15PL001.Cruise Sample Location Weather conditions Water column depth (m) δ¹⁵NAIR (‰) δ¹³CVPDB (‰) C/N δ¹⁸OVSMOW (‰) δ¹³CDICVPDB (‰) 14P…
View article: Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand
Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand Open
The Southern Hemisphere westerly winds (SHWW) play a major role in controlling wind-driven upwelling of Circumpolar Deep Water (CDW) and outgassing of CO2 in the Southern Ocean on interannual to glacial-interglacial timescales. Despite the…
View article: Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux
Age, 232Th, 230Th, 238U, CaCO3, organic carbon, lithogenic fraction, opal, and iron concentrations of 4 sediment cores from the southwest Pacific, with calculated 230Th-normalized mass flux Open
Increased export production (EP) in the Subantarctic Zone (SAZ) of the Southern Ocean due to iron fertilisation has been proposed as a key mechanism for explaining carbon drawdown during the last glacial maximum (LGM). This work reconstruc…