Werner Ehrmann
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View article: West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene
West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene Open
Mass loss from polar ice sheets is poorly constrained in estimates of future global sea-level rise. Today, the marine-based West Antarctic Ice Sheet is losing mass at an accelerating rate, most notably in the Thwaites and Pine Island glaci…
View article: Controls of aeolian and fluvial sediment influx to the northern Red Sea over the last 220 000 years
Controls of aeolian and fluvial sediment influx to the northern Red Sea over the last 220 000 years Open
Present-day sediment influx to the northern Red Sea is dominated by aeolian dust because of its position between the large deserts of northern Africa, the Arabian Peninsula, and the Levant, as well as the absence of discharge from perennia…
View article: Controls of aeolian and fluvial sediment influx to the northern Red Sea over the last 220 000 years
Controls of aeolian and fluvial sediment influx to the northern Red Sea over the last 220 000 years Open
Present-day sediment influx to the northern Red Sea is dominated by aeolian dust because of its position between the large deserts of northern Africa, the Arabian Peninsula and the Levant, and the absence of discharge from perennial rivers…
View article: Ice sheet–free West Antarctica during peak early Oligocene glaciation
Ice sheet–free West Antarctica during peak early Oligocene glaciation Open
One of Earth’s most fundamental climate shifts, the greenhouse-icehouse transition 34 million years ago, initiated Antarctic ice sheet buildup, influencing global climate until today. However, the extent of the ice sheet during the Early O…
View article: A large-scale transcontinental river system crossed West Antarctica during the Eocene
A large-scale transcontinental river system crossed West Antarctica during the Eocene Open
Extensive ice coverage largely prevents investigations of Antarctica’s unglaciated past. Knowledge about environmental and tectonic development before large-scale glaciation, however, is important for understanding the transition into the …
View article: Byrd Ice Core Debris Constrains the Sediment Provenance Signature of Central West Antarctica
Byrd Ice Core Debris Constrains the Sediment Provenance Signature of Central West Antarctica Open
Provenance records from sediments deposited offshore of the West Antarctic Ice Sheet (WAIS) can help identify past major ice retreat, thus constraining ice‐sheet models projecting future sea‐level rise. Interpretations from such records ar…
View article: Synchronous retreat of Thwaites and Pine Island glaciers in response to external forcings in the presatellite era
Synchronous retreat of Thwaites and Pine Island glaciers in response to external forcings in the presatellite era Open
Today, relatively warm Circumpolar Deep Water is melting Thwaites Glacier at the base of its ice shelf and at the grounding zone, contributing to significant ice retreat. Accelerating ice loss has been observed since the 1970s; however, it…
View article: Changes in the Red Sea overturning circulation during Marine Isotope Stage 3
Changes in the Red Sea overturning circulation during Marine Isotope Stage 3 Open
The oceanography of the Red Sea is controlled by the restricted exchange of water masses with the Indian Ocean and by high evaporation rates due to the arid climate of the surrounding land areas. In the northern Red Sea, the formation of o…
View article: Monsoon-driven changes in aeolian and fluvial sediment input to the central Red Sea recorded throughout the last 200 000 years
Monsoon-driven changes in aeolian and fluvial sediment input to the central Red Sea recorded throughout the last 200 000 years Open
Climatic and associated hydrological changes controlled the transport processes and composition of the sediments in the central Red Sea during the last ca. 200 kyr. Three different source areas for mineral dust are identified. The dominant…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Climatic and associated hydrological changes controlled the transport processes and composition of the sediments in the central Red Sea during the last ca. 200 kyr. Three different source areas for mineral dust are identified. Th…
View article: Reply on RC2
Reply on RC2 Open
Abstract. Climatic and associated hydrological changes controlled the transport processes and composition of the sediments in the central Red Sea during the last ca. 200 kyr. Three different source areas for mineral dust are identified. Th…
View article: Clay mineralogy of debris from the basal ice of the Byrd ice core, central West Antarctica
Clay mineralogy of debris from the basal ice of the Byrd ice core, central West Antarctica Open
This dataset contains the clay mineral assemblage of debris melted from three intervals of basal ice from the Byrd ice core. Analyses were conducted on the <2 micron fraction. The ice core the debris was extracted from was drilled at 80° 0…
View article: Clay mineralogy of debris from the basal ice of the Byrd ice core, central West Antarctica
Clay mineralogy of debris from the basal ice of the Byrd ice core, central West Antarctica Open
This dataset contains the clay mineral assemblage of debris melted from three intervals of basal ice from the Byrd ice core. Analyses were conducted on the <2 micron fraction. The ice core the debris was extracted from was drilled at 80° 0…
View article: Comment on egusphere-2023-1677
Comment on egusphere-2023-1677 Open
Abstract. The oceanography of the Red Sea is controlled by the restricted exchange of water masses with the Indian Ocean and by high evaporation rates due to the arid climate of the surrounding land areas. In the northern Red Sea, the form…
View article: Comment on egusphere-2023-1677
Comment on egusphere-2023-1677 Open
Abstract. The oceanography of the Red Sea is controlled by the restricted exchange of water masses with the Indian Ocean and by high evaporation rates due to the arid climate of the surrounding land areas. In the northern Red Sea, the form…
View article: Supplementary material to "Changes in the Red Sea Overturning Circulation during Marine Isotope Stage 3"
Supplementary material to "Changes in the Red Sea Overturning Circulation during Marine Isotope Stage 3" Open
ATable S1 Oxygen and carbon stable isotope data set used for establishing the epibenthic foraminifera composite isotope record of the KL11 core.
View article: Changes in the Red Sea Overturning Circulation during Marine Isotope Stage 3
Changes in the Red Sea Overturning Circulation during Marine Isotope Stage 3 Open
The oceanography of the Red Sea is controlled by the restricted exchange of water masses with the Indian Ocean and by high evaporation rates due to the arid climate of the surrounding land areas. In the northern Red Sea, the formation of o…
View article: Monsoon-driven changes in aeolian and fluvial sediment input to the central Red Sea recorded throughout the last 200,000 years
Monsoon-driven changes in aeolian and fluvial sediment input to the central Red Sea recorded throughout the last 200,000 years Open
Climatic and associated hydrological changes controlled the transport processes and composition of the sediments in the central Red Sea during the last ca. 200 kyr. Three different source areas for mineral dust are identified. The dominant…
View article: Holocene history of the 79° N ice shelf reconstructed from epishelf lake and uplifted glaciomarine sediments
Holocene history of the 79° N ice shelf reconstructed from epishelf lake and uplifted glaciomarine sediments Open
Nioghalvfjerdsbrae, or 79∘ N Glacier, is the largest marine-terminating glacier draining the Northeast Greenland Ice Stream (NEGIS). In recent years, its ∼ 70 km long fringing ice shelf (hereafter referred to as the 79∘ N ice shelf) has th…
View article: Holocene history of 79° N ice shelf reconstructed from epishelf lake and uplifted glacimarine sediments
Holocene history of 79° N ice shelf reconstructed from epishelf lake and uplifted glacimarine sediments Open
Nioghalvfjerdsbrae, or 79° N Glacier, is the largest marine-terminating glacier draining Northeast Greenland Ice Stream (NEGIS). In recent years, it’s ~70 km-long fringing ice shelf (hereafter referred to as 79° N ice shelf) has thinned, a…
View article: History of Anvers-Hugo Trough, western Antarctic Peninsula shelf, since the Last Glacial Maximum. Part I: Deglacial history based on new sedimentological and chronological data
History of Anvers-Hugo Trough, western Antarctic Peninsula shelf, since the Last Glacial Maximum. Part I: Deglacial history based on new sedimentological and chronological data Open
Reconstructing the advance and retreat of past ice sheets provides important long-term context for recent change(s) and enables us to better understand ice sheet responses to forcing mechanisms and external boundary conditions that regulat…
View article: Boundary processes and neodymium cycling along the Pacific margin of West Antarctica
Boundary processes and neodymium cycling along the Pacific margin of West Antarctica Open
Neodymium (Nd) isotopes have been utilized as a tracer of water mass source in the modern ocean and in palaeoceanographic studies, though the oceanic cycling of Nd is not yet fully constrained. Recent studies have highlighted the importanc…
View article: History of the Larsen C Ice Shelf reconstructed from sub–ice shelf and offshore sediments
History of the Larsen C Ice Shelf reconstructed from sub–ice shelf and offshore sediments Open
Because ice shelves respond to climatic forcing over a range of time scales, from years to millennia, an understanding of their long-term history is critically needed for predicting their future evolution. We present the first detailed rec…
View article: West Antarctic archipelago covered by cool-temperate forests during early Oligocene glaciation
West Antarctic archipelago covered by cool-temperate forests during early Oligocene glaciation Open
<p>The Eocene-Oligocene Transition (~34.4&#8211;33.7 Ma) marks a major step in the long-term evolution from the greenhouse climate of the Early Palaeogene to the icehouse regime of the Late Neogene and Quaternary. However, it rem…