Amy Leventer
Datos Biográficos
| ID | 6370263 |
|---|---|
| NOMBRE | Amy Leventer |
| NOMBRES | Amy |
| APELLIDO | Leventer |
| FIRMA | LEVENTER A |
| AFILIACIONES | Colgate University |
| ORCID | 0000-0001-9401-0987 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 5 |
| TOTAL DE CITAS | 22 |
| TOTAL COMO AUTOR | 5 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1999 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2020 |
| ÍNDICE H | 3 |
Antarctic ecosystem responses following ice‐shelf collapse and iceberg calving
The calving of A‐68, the 5,800‐km 2 , 1‐trillion‐ton iceberg shed from the Larsen C Ice Shelf in July 2017, is one of over 10 significant ice‐shelf loss events in the past few decades resulting from rapid warming around the Antarctic Peninsula. The rapid thinning, retreat, and collapse of ice shelves along the Antarctic Peninsula are harbingers of warming effects around the entire continent. Ice shelves cover more than 1.5 million km 2 and fringe…
Mechanisms of Holocene palaeoenvironmental change in the Antarctic Peninsula region
The Antarctic Peninsula is one of the three fastest warming regions on Earth. Here we review Holocene proxy records of marine and terrestrial palaeoclimate in the region, and discuss possible forcing mechanisms underlying past change, with a specific focus on past warm periods. Our aim is to critically evaluate the mechanisms by which palaeoclimate changes might have occurred, in order to provide a longer-term context for assessing the drivers of…
Chronology of the Palmer Deep site, Antarctic Peninsula
Palmer Deep sediment cores are used to produce the first high-resolution, continuous late Pleistocene to Holocene time-series from the Antarctic marine system. The sedimentary record is dated using accelerator mass spectrometer radiocarbon methods on acid insoluble organic matter and foraminiferal calcite. Fifty-four radiocarbon analyses are utilized in the dating which provides a calibrated timescale back to 13 ka BP. Reliability of resultant ag…
Problems and Possible Solutions Concerning Radiocarbon Dating of Surface Marine Sediments, Ross Sea, Antarctica
Radiocarbon accelerator mass spectrometric (AMS) dates on the acid-insoluble fraction from 38 core tops from the western Ross Sea, Antarctica, are used to address these questions: (1) What are the apparent ages of sediments at or close to the present sediment/water interface? (2) Is there a statistically significant pattern to the spatial distribution of core top ages? and (3) Is there a “correction factor” that can be applied to these age determ…
Late Pleistocene-Holocene marine conditions in the Ross Sea, Antarctica
Statistical analyses of diatom assemblages from radiocarbon-dated sediment cores were used to reconstruct changing palaeoceanographic conditions in the western and west-central Ross Sea, Antarctica, from. c.12 14 C kyr BP to the present. Data from three Kasten cores support a north-to-south time-transgressive glacial/interglacial transition. Assemblages at the base of each core suggest that glacial processes affecting frustule preservation were s…
Mechanisms of Holocene palaeoenvironmental change in the Antarctic Peninsula region
The Antarctic Peninsula is one of the three fastest warming regions on Earth. Here we review Holocene proxy records of marine and terrestrial palaeoclimate in the region, and discuss possible forcing mechanisms underlying past change, with a specific focus on past warm periods. Our aim is to critically evaluate the mechanisms by which palaeoclimate changes might have occurred, in order to provide a longer-term context for assessing the drivers of…
Chronology of the Palmer Deep site, Antarctic Peninsula
Palmer Deep sediment cores are used to produce the first high-resolution, continuous late Pleistocene to Holocene time-series from the Antarctic marine system. The sedimentary record is dated using accelerator mass spectrometer radiocarbon methods on acid insoluble organic matter and foraminiferal calcite. Fifty-four radiocarbon analyses are utilized in the dating which provides a calibrated timescale back to 13 ka BP. Reliability of resultant ag…
Late Pleistocene-Holocene marine conditions in the Ross Sea, Antarctica
Statistical analyses of diatom assemblages from radiocarbon-dated sediment cores were used to reconstruct changing palaeoceanographic conditions in the western and west-central Ross Sea, Antarctica, from. c.12 14 C kyr BP to the present. Data from three Kasten cores support a north-to-south time-transgressive glacial/interglacial transition. Assemblages at the base of each core suggest that glacial processes affecting frustule preservation were s…
Antarctic ecosystem responses following ice‐shelf collapse and iceberg calving
The calving of A‐68, the 5,800‐km 2 , 1‐trillion‐ton iceberg shed from the Larsen C Ice Shelf in July 2017, is one of over 10 significant ice‐shelf loss events in the past few decades resulting from rapid warming around the Antarctic Peninsula. The rapid thinning, retreat, and collapse of ice shelves along the Antarctic Peninsula are harbingers of warming effects around the entire continent. Ice shelves cover more than 1.5 million km 2 and fringe…
Problems and Possible Solutions Concerning Radiocarbon Dating of Surface Marine Sediments, Ross Sea, Antarctica
Radiocarbon accelerator mass spectrometric (AMS) dates on the acid-insoluble fraction from 38 core tops from the western Ross Sea, Antarctica, are used to address these questions: (1) What are the apparent ages of sediments at or close to the present sediment/water interface? (2) Is there a statistically significant pattern to the spatial distribution of core top ages? and (3) Is there a “correction factor” that can be applied to these age determ…
Late Pleistocene-Holocene marine conditions in the Ross Sea, Antarctica
Statistical analyses of diatom assemblages from radiocarbon-dated sediment cores were used to reconstruct changing palaeoceanographic conditions in the western and west-central Ross Sea, Antarctica, from. c.12 14 C kyr BP to the present. Data from three Kasten cores support a north-to-south time-transgressive glacial/interglacial transition. Assemblages at the base of each core suggest that glacial processes affecting frustule preservation were s…
Chronology of the Palmer Deep site, Antarctic Peninsula
Palmer Deep sediment cores are used to produce the first high-resolution, continuous late Pleistocene to Holocene time-series from the Antarctic marine system. The sedimentary record is dated using accelerator mass spectrometer radiocarbon methods on acid insoluble organic matter and foraminiferal calcite. Fifty-four radiocarbon analyses are utilized in the dating which provides a calibrated timescale back to 13 ka BP. Reliability of resultant ag…
Mechanisms of Holocene palaeoenvironmental change in the Antarctic Peninsula region
The Antarctic Peninsula is one of the three fastest warming regions on Earth. Here we review Holocene proxy records of marine and terrestrial palaeoclimate in the region, and discuss possible forcing mechanisms underlying past change, with a specific focus on past warm periods. Our aim is to critically evaluate the mechanisms by which palaeoclimate changes might have occurred, in order to provide a longer-term context for assessing the drivers of…
Antarctic ecosystem responses following ice‐shelf collapse and iceberg calving
The calving of A‐68, the 5,800‐km 2 , 1‐trillion‐ton iceberg shed from the Larsen C Ice Shelf in July 2017, is one of over 10 significant ice‐shelf loss events in the past few decades resulting from rapid warming around the Antarctic Peninsula. The rapid thinning, retreat, and collapse of ice shelves along the Antarctic Peninsula are harbingers of warming effects around the entire continent. Ice shelves cover more than 1.5 million km 2 and fringe…
Geography (4 obras) · Geology (4 obras) · Geology and Paleoclimatology Research (4 obras) · Holocene (4 obras) · Isotope Analysis in Ecology (4 obras) · Oceanography (4 obras) · Physical geography (4 obras) · Holocene climatic optimum (3 obras) · Radiocarbon dating (3 obras) · Cryospheric studies and observations (2 obras)