Henry F Lamb
Biographic Data
| ID | 5597968 |
|---|---|
| NAME | Henry F Lamb |
| GIVEN NAMES | Henry F |
| FAMILY NAME | Lamb |
| SIGNATURE | LAMB H F |
| AFFILIATIONS | Aberystwyth University |
| ORCID | 0000-0003-0025-0766 |
| VERIFIED | Yes |
| TOTAL WORKS | 26 |
| TOTAL CITATIONS | 118 |
| AUTHOR COUNT | 26 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1995 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 6 |
Modern pollen–vegetation relationships and human indicator taxa at high elevation human-impacted areas of the Bale Mountains, Ethiopia
Understanding the relationships between modern pollen assemblages and vegetation patterns is fundamental for reconstructing past landscapes and assessing anthropogenic impacts in ecologically sensitive high-altitude ecosystems. While previous studies in Ethiopia’s Bale Mountains explored paleo-reconstruction, quantitative approaches remain limited. This study quantifies pollen–vegetation relationships using transfer factors (TF), evaluates ecolog…
The Holocene lake-evaporation history of the afro-alpine Lake Garba Guracha in the Bale Mountains, Ethiopia, based on δ 18 O records of sugar biomarker and diatoms
In eastern Africa, there are few long, high-quality records of environmental change at high altitudes, inhibiting a broader understanding of regional climate change. We investigated a Holocene lacustrine sediment archive from Lake Garba Guracha, Bale Mountains, Ethiopia, (3,950 m asl), and reconstructed high-altitude lake evaporation history using δ 18 O records derived from the analysis of compound-specific sugar biomarkers and diatoms. The δ 18…
Paleo-Enso influence on African environmentsand early modern humans
lt;p>In this study, we synthesize terrestrial and marine proxy records, spanning the past 620,000 years, to decipher pan-African climate variability and its drivers and potential linkages to hominin evolution. We find a tight correlation between moisture availability across Africa to El Niño Southern Ocean oscillation (ENSO) variability, a manifestation of the Walker Circulation, that was most likely driven by changes in Earth’s eccentricity. Our…
The new Garba Guracha palynological sequence: Revision and data expansion
In the context of the DFG-funded project ‘Mountain Exile Hypothesis’ (FOR2358) we retrieved a 15.5 m long sediment core from Garba Guracha (GG) (Bale Mountains National Park, Ethiopia – BMNP) during February 2017. A 16,000 year record of 62 pollen samples has been previously produced from GG by Umer et al. (2007). In this data paper, we present a new palynological and macrocharcoal record, with 259 pollen and 1301 charcoal samples covering the la…
Reanalysis of the Atmospheric Radiocarbon Calibration Record from Lake Suigetsu, Japan
Terrestrial plant macrofossils from the sedimentary record of Lake Suigetsu, Japan, provide the only quasi-continuous direct atmospheric record of radiocarbon ( 14 C) covering the last 50 ka cal BP (Bronk Ramsey et al. 2012). Since then, new high precision data have become available on U-Th dated speleothems from Hulu Cave China, covering the same time range (Cheng et al. 2018). In addition, an updated varve-based chronology has also been publish…
Abrupt or gradual? Change point analysis of the late Pleistocene–Holocene climate record from Chew Bahir, southern Ethiopia
We used a change point analysis on a late Pleistocene–Holocene lake-sediment record from the Chew Bahir basin in the southern Ethiopian Rift to determine the amplitude and duration of past climate transitions. The most dramatic changes occurred over 240 yr (from ~15,700 to 15,460 yr) during the onset of the African Humid Period (AHP), and over 990 yr (from ~4875 to 3885 yr) during its protracted termination. The AHP was interrupted by a distinct …
Toward a late Quaternary tephrostratigraphic framework for connecting East African palaeoenvironmental archives
A History of Human Impact on Moroccan Mountain Landscapes
Climatic variability, plasticity, and dispersal: A case study from Lake Tana, Ethiopia
John Birks: Pioneer in quantitative palaeoecology
We describe the career of John Birks as a pioneering scientist who has, over a career spanning five decades, transformed palaeoecology from a largely descriptive to a rigorous quantitative science relevant to contemporary questions in ecology and environmental change. We review his influence on students and colleagues not only at Cambridge and Bergen Universities, his places of primary employment, but also on individuals and research groups in Eu…
Integration of the Old and New Lake Suigetsu (Japan) Terrestrial Radiocarbon Calibration Data Sets
The varved sediment profile of Lake Suigetsu, central Japan, offers an ideal opportunity from which to derive a terrestrial record of atmospheric radiocarbon across the entire range of the 14 C dating method. Previous work by Kitagawa and van der Plicht (1998a,b, 2000) provided such a data set; however, problems with the varve-based age scale of their SG93 sediment core precluded the use of this data set for 14 C calibration purposes. Lake Suiget…
Climatic change recorded in the sediments of the Chew Bahir basin, southern Ethiopia, during the last 45,000 years
New 14 C Determinations from Lake Suigetsu, Japan: 12,000 To 0 Cal BP
Calibration is a fundamental stage of the radiocarbon ( 14 C) dating process if one is to derive meaningful calendar ages from samples' 14 C measurements. For the first time, the IntCal09 calibration curve (Reimer et al. 2009) provided an internationally ratified calibration data set across almost the complete range (0 to 50,000 cal BP) of the 14 C timescale. However, only the last 12,550 cal yr of this record are composed of terrestrial data, le…
Long-term resilience, bush encroachment patterns and local knowledge in a Northeast African savanna
Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: The Isomed synthesis
Oxygen and carbon isotope composition of authigenic carbonate from an Ethiopian lake: A climate record of the last 2000 years
The oxygen and carbon isotope composition of sedimentary carbonates formed in Lake Hayq, a closed-basin lake in northern Ethiopia, suggests marked variation in the balance between precipitation and evaporation during the last 2000 years. Diatom stratigraphy shows that the lake remained deep enough to support planktonic taxa, and was never saline. The record suggests that rainfall was higher than that of the twentieth century during most of this t…
Unusual mid-Holocene abundance of Ulmus in western Ireland-human impact in the absence of a pathogen
A Holocene pollen record from Co. Clare, western Ireland, shows unusually high Ulmus pollen frequencies until about 2500 cal. BP, interrupted by four brief episodes of reduced Ulmus pollen between 6000 and 3000 cal. BR Localized anthropogenic disturbance of the vegetation during this interval is inferred from higher magnetic susceptibility of the sediments, indicating soil erosion, and from increased Poaceae and Plantago pollen. The continued abu…
Forest clearance and regrowth in northern Ethiopia during the last 3000 years
Pollen and charcoal analysis of sediment cores from two lakes in the highlands of northern Ethiopia provide evidence that the vegetation has changed in response to human impact during the last 3000 years. The natural, pre-disturbance vegetation of the area was Podocarpus-Juniperus forest. At about 500 bc, following Semitic immigration to northern Ethiopia, the forests were cleared and replaced by a secondary vegetation of Dodonaea scrub and grass…
Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years
Pollen data from a 625 cm sediment core from Crescent Island Crater, a subbasin of Lake Naivasha, Kenya, provide an 1100-year record of vegetation change at a mean time resolution of 15 years. Earlier data from the same core show a record of lake depth (and thus inferred rainfall variation) in the form of changing sedimentary facies, supported by salinity inferences based on diatom and chironomid assemblages. Stratigraphic variation in the abunda…
The environmental impact of the Minoan eruption of Santorini (Thera): Statistical analysis of palaeoecological data from Golbisar, southwest Turkey
A tephra layer originating from the mid-second millennium BC (3300 14 C yr BP) ‘Minoan’ eruption of Santorini (or Thera) in the Aegean has been found in lake sediments at G6lhisar in southwest Turkey. Microstratigraphic analyses of tephra shard concentration (TSC), pollen, diatoms, sponge spicules and nonsiliceous microfossils in sediments from Gtlhisar permit the impact of this major volcanic eruption on terrestrial and aquatic biota to be inves…
A 9000-year oxygen and carbon isotope record of hydrological change in a small Ethiopian crater lake
The stable isotope composition of authigenic calcites in a core from Lake Tilo, a small crater lake in the Ethiopian Rift Valley, provides a subcentury scale record of lake response to climatic change over the last 8850 14 C yrs (9850 cal. yrs). An unusually high range of δ 18 O and δ 13 C values (~15,) is attributed, in part, to major changes in hydrothermal groundwater flux. Although hydrothermal groundwater influx to the lake was high during t…
Groundwater-Mediated Response to Holocene Climatic Change Recorded by the Diatom Stratigraphy of an Ethiopian Crater Lake
The diatom stratigraphy of a 23-m sediment core from Lake Tilo, a maar lake in the Ethiopian Rift Valley, provides a 10,000-yr record of lake salinity and trophic status. Until 5500 14 C yr B.P., the phytoplankton was dominated by Aulacoseira granulata, with only minor changes in the abundance of other diatoms; the lake was over 50 m deep, eutrophic, and oligosaline. At 5500 yr B.P., geothermal groundwater inflow, inferred from calcite and silica…
Holocene environmental change in southwest Turkey: A palaeoecological record of lake and catchment-related changes
Carbon and oxygen isotope variations within the shell of an African land snail (Limicolaria kambeul chudeauiGermain): A high-resolution record of climate seasonality
Stable isotope analyses at high-resolution intervals along the growth axis of a shell of the land snail Limicolaria kambeul chudeaui Germain, collected in Ethiopia, show a cyclic pattern of d 18 O variation. The cycles have regular periodicity but vary in amplitude. The shape and amplitude of the shell d 18 O cycles is consistent with seasonal changes in the amount and isotopic composition of the rainfall, coupled with tempera ture and evaporativ…
Palaeoecological and archaeological evidence for human occupance in southwest Turkey: The Beyşehir occupation phase
The mountains of the Eastern Mediterranean have a long history of human occupation and exploitation of the natural environment (Grenon, Batisse 1989; McNeil 1992). Whilst the reconstruction of vegetation and human-induced landscape change is primarily based upon pollen analysis and other palaeoecological methods, the history of human occupation relies heavily upon archaeology, including field survey information and excavation reports. Both palaeo…
Climatic variability, plasticity, and dispersal: A case study from Lake Tana, Ethiopia
Reanalysis of the Atmospheric Radiocarbon Calibration Record from Lake Suigetsu, Japan
Terrestrial plant macrofossils from the sedimentary record of Lake Suigetsu, Japan, provide the only quasi-continuous direct atmospheric record of radiocarbon ( 14 C) covering the last 50 ka cal BP (Bronk Ramsey et al. 2012). Since then, new high precision data have become available on U-Th dated speleothems from Hulu Cave China, covering the same time range (Cheng et al. 2018). In addition, an updated varve-based chronology has also been publish…
Forest clearance and regrowth in northern Ethiopia during the last 3000 years
Pollen and charcoal analysis of sediment cores from two lakes in the highlands of northern Ethiopia provide evidence that the vegetation has changed in response to human impact during the last 3000 years. The natural, pre-disturbance vegetation of the area was Podocarpus-Juniperus forest. At about 500 bc, following Semitic immigration to northern Ethiopia, the forests were cleared and replaced by a secondary vegetation of Dodonaea scrub and grass…
Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years
Pollen data from a 625 cm sediment core from Crescent Island Crater, a subbasin of Lake Naivasha, Kenya, provide an 1100-year record of vegetation change at a mean time resolution of 15 years. Earlier data from the same core show a record of lake depth (and thus inferred rainfall variation) in the form of changing sedimentary facies, supported by salinity inferences based on diatom and chironomid assemblages. Stratigraphic variation in the abunda…
Palaeoecological and archaeological evidence for human occupance in southwest Turkey: The Beyşehir occupation phase
The mountains of the Eastern Mediterranean have a long history of human occupation and exploitation of the natural environment (Grenon, Batisse 1989; McNeil 1992). Whilst the reconstruction of vegetation and human-induced landscape change is primarily based upon pollen analysis and other palaeoecological methods, the history of human occupation relies heavily upon archaeology, including field survey information and excavation reports. Both palaeo…
Oxygen and carbon isotope composition of authigenic carbonate from an Ethiopian lake: A climate record of the last 2000 years
The oxygen and carbon isotope composition of sedimentary carbonates formed in Lake Hayq, a closed-basin lake in northern Ethiopia, suggests marked variation in the balance between precipitation and evaporation during the last 2000 years. Diatom stratigraphy shows that the lake remained deep enough to support planktonic taxa, and was never saline. The record suggests that rainfall was higher than that of the twentieth century during most of this t…
New 14 C Determinations from Lake Suigetsu, Japan: 12,000 To 0 Cal BP
Calibration is a fundamental stage of the radiocarbon ( 14 C) dating process if one is to derive meaningful calendar ages from samples' 14 C measurements. For the first time, the IntCal09 calibration curve (Reimer et al. 2009) provided an internationally ratified calibration data set across almost the complete range (0 to 50,000 cal BP) of the 14 C timescale. However, only the last 12,550 cal yr of this record are composed of terrestrial data, le…
The environmental impact of the Minoan eruption of Santorini (Thera): Statistical analysis of palaeoecological data from Golbisar, southwest Turkey
A tephra layer originating from the mid-second millennium BC (3300 14 C yr BP) ‘Minoan’ eruption of Santorini (or Thera) in the Aegean has been found in lake sediments at G6lhisar in southwest Turkey. Microstratigraphic analyses of tephra shard concentration (TSC), pollen, diatoms, sponge spicules and nonsiliceous microfossils in sediments from Gtlhisar permit the impact of this major volcanic eruption on terrestrial and aquatic biota to be inves…
Integration of the Old and New Lake Suigetsu (Japan) Terrestrial Radiocarbon Calibration Data Sets
The varved sediment profile of Lake Suigetsu, central Japan, offers an ideal opportunity from which to derive a terrestrial record of atmospheric radiocarbon across the entire range of the 14 C dating method. Previous work by Kitagawa and van der Plicht (1998a,b, 2000) provided such a data set; however, problems with the varve-based age scale of their SG93 sediment core precluded the use of this data set for 14 C calibration purposes. Lake Suiget…
Vegetational response to Holocene climatic change: Pollen and palaeolimnological data from the Middle Atlas, Morocco
Pollen data from a radiocarbon-dated lake-sediment core from the Middle Atlas of Morocco show that forests of evergreen and winter-deciduous oaks (Quercus rotundifolia, Q. canariensis), present from the start of the Holocene, were invaded at 6200 BP by Cedrus atlantica in low numbers. Two thousand years later, after a short period characterized by higher deciduous oak frequency, Cedrus increased to its present abundance. These changes may have be…
A History of Human Impact on Moroccan Mountain Landscapes
Long-term resilience, bush encroachment patterns and local knowledge in a Northeast African savanna
A 9000-year oxygen and carbon isotope record of hydrological change in a small Ethiopian crater lake
The stable isotope composition of authigenic calcites in a core from Lake Tilo, a small crater lake in the Ethiopian Rift Valley, provides a subcentury scale record of lake response to climatic change over the last 8850 14 C yrs (9850 cal. yrs). An unusually high range of δ 18 O and δ 13 C values (~15,) is attributed, in part, to major changes in hydrothermal groundwater flux. Although hydrothermal groundwater influx to the lake was high during t…
Unusual mid-Holocene abundance of Ulmus in western Ireland-human impact in the absence of a pathogen
A Holocene pollen record from Co. Clare, western Ireland, shows unusually high Ulmus pollen frequencies until about 2500 cal. BP, interrupted by four brief episodes of reduced Ulmus pollen between 6000 and 3000 cal. BR Localized anthropogenic disturbance of the vegetation during this interval is inferred from higher magnetic susceptibility of the sediments, indicating soil erosion, and from increased Poaceae and Plantago pollen. The continued abu…
Carbon and oxygen isotope variations within the shell of an African land snail (Limicolaria kambeul chudeauiGermain): A high-resolution record of climate seasonality
Stable isotope analyses at high-resolution intervals along the growth axis of a shell of the land snail Limicolaria kambeul chudeaui Germain, collected in Ethiopia, show a cyclic pattern of d 18 O variation. The cycles have regular periodicity but vary in amplitude. The shape and amplitude of the shell d 18 O cycles is consistent with seasonal changes in the amount and isotopic composition of the rainfall, coupled with tempera ture and evaporativ…
Paleo-Enso influence on African environmentsand early modern humans
lt;p>In this study, we synthesize terrestrial and marine proxy records, spanning the past 620,000 years, to decipher pan-African climate variability and its drivers and potential linkages to hominin evolution. We find a tight correlation between moisture availability across Africa to El Niño Southern Ocean oscillation (ENSO) variability, a manifestation of the Walker Circulation, that was most likely driven by changes in Earth’s eccentricity. Our…
Vegetational response to Holocene climatic change: Pollen and palaeolimnological data from the Middle Atlas, Morocco
Pollen data from a radiocarbon-dated lake-sediment core from the Middle Atlas of Morocco show that forests of evergreen and winter-deciduous oaks (Quercus rotundifolia, Q. canariensis), present from the start of the Holocene, were invaded at 6200 BP by Cedrus atlantica in low numbers. Two thousand years later, after a short period characterized by higher deciduous oak frequency, Cedrus increased to its present abundance. These changes may have be…
Carbon and oxygen isotope variations within the shell of an African land snail (Limicolaria kambeul chudeauiGermain): A high-resolution record of climate seasonality
Stable isotope analyses at high-resolution intervals along the growth axis of a shell of the land snail Limicolaria kambeul chudeaui Germain, collected in Ethiopia, show a cyclic pattern of d 18 O variation. The cycles have regular periodicity but vary in amplitude. The shape and amplitude of the shell d 18 O cycles is consistent with seasonal changes in the amount and isotopic composition of the rainfall, coupled with tempera ture and evaporativ…
Palaeoecological and archaeological evidence for human occupance in southwest Turkey: The Beyşehir occupation phase
The mountains of the Eastern Mediterranean have a long history of human occupation and exploitation of the natural environment (Grenon, Batisse 1989; McNeil 1992). Whilst the reconstruction of vegetation and human-induced landscape change is primarily based upon pollen analysis and other palaeoecological methods, the history of human occupation relies heavily upon archaeology, including field survey information and excavation reports. Both palaeo…
Groundwater-Mediated Response to Holocene Climatic Change Recorded by the Diatom Stratigraphy of an Ethiopian Crater Lake
The diatom stratigraphy of a 23-m sediment core from Lake Tilo, a maar lake in the Ethiopian Rift Valley, provides a 10,000-yr record of lake salinity and trophic status. Until 5500 14 C yr B.P., the phytoplankton was dominated by Aulacoseira granulata, with only minor changes in the abundance of other diatoms; the lake was over 50 m deep, eutrophic, and oligosaline. At 5500 yr B.P., geothermal groundwater inflow, inferred from calcite and silica…
Holocene environmental change in southwest Turkey: A palaeoecological record of lake and catchment-related changes
A 9000-year oxygen and carbon isotope record of hydrological change in a small Ethiopian crater lake
The stable isotope composition of authigenic calcites in a core from Lake Tilo, a small crater lake in the Ethiopian Rift Valley, provides a subcentury scale record of lake response to climatic change over the last 8850 14 C yrs (9850 cal. yrs). An unusually high range of δ 18 O and δ 13 C values (~15,) is attributed, in part, to major changes in hydrothermal groundwater flux. Although hydrothermal groundwater influx to the lake was high during t…
The environmental impact of the Minoan eruption of Santorini (Thera): Statistical analysis of palaeoecological data from Golbisar, southwest Turkey
A tephra layer originating from the mid-second millennium BC (3300 14 C yr BP) ‘Minoan’ eruption of Santorini (or Thera) in the Aegean has been found in lake sediments at G6lhisar in southwest Turkey. Microstratigraphic analyses of tephra shard concentration (TSC), pollen, diatoms, sponge spicules and nonsiliceous microfossils in sediments from Gtlhisar permit the impact of this major volcanic eruption on terrestrial and aquatic biota to be inves…
Forest clearance and regrowth in northern Ethiopia during the last 3000 years
Pollen and charcoal analysis of sediment cores from two lakes in the highlands of northern Ethiopia provide evidence that the vegetation has changed in response to human impact during the last 3000 years. The natural, pre-disturbance vegetation of the area was Podocarpus-Juniperus forest. At about 500 bc, following Semitic immigration to northern Ethiopia, the forests were cleared and replaced by a secondary vegetation of Dodonaea scrub and grass…
Vegetation response to rainfall variation and human impact in central Kenya during the past 1100 years
Pollen data from a 625 cm sediment core from Crescent Island Crater, a subbasin of Lake Naivasha, Kenya, provide an 1100-year record of vegetation change at a mean time resolution of 15 years. Earlier data from the same core show a record of lake depth (and thus inferred rainfall variation) in the form of changing sedimentary facies, supported by salinity inferences based on diatom and chironomid assemblages. Stratigraphic variation in the abunda…
Unusual mid-Holocene abundance of Ulmus in western Ireland-human impact in the absence of a pathogen
A Holocene pollen record from Co. Clare, western Ireland, shows unusually high Ulmus pollen frequencies until about 2500 cal. BP, interrupted by four brief episodes of reduced Ulmus pollen between 6000 and 3000 cal. BR Localized anthropogenic disturbance of the vegetation during this interval is inferred from higher magnetic susceptibility of the sediments, indicating soil erosion, and from increased Poaceae and Plantago pollen. The continued abu…
Oxygen and carbon isotope composition of authigenic carbonate from an Ethiopian lake: A climate record of the last 2000 years
The oxygen and carbon isotope composition of sedimentary carbonates formed in Lake Hayq, a closed-basin lake in northern Ethiopia, suggests marked variation in the balance between precipitation and evaporation during the last 2000 years. Diatom stratigraphy shows that the lake remained deep enough to support planktonic taxa, and was never saline. The record suggests that rainfall was higher than that of the twentieth century during most of this t…
Stable isotope records of Late Quaternary climate and hydrology from Mediterranean lakes: The Isomed synthesis
Long-term resilience, bush encroachment patterns and local knowledge in a Northeast African savanna
New 14 C Determinations from Lake Suigetsu, Japan: 12,000 To 0 Cal BP
Calibration is a fundamental stage of the radiocarbon ( 14 C) dating process if one is to derive meaningful calendar ages from samples' 14 C measurements. For the first time, the IntCal09 calibration curve (Reimer et al. 2009) provided an internationally ratified calibration data set across almost the complete range (0 to 50,000 cal BP) of the 14 C timescale. However, only the last 12,550 cal yr of this record are composed of terrestrial data, le…
Climatic change recorded in the sediments of the Chew Bahir basin, southern Ethiopia, during the last 45,000 years
Integration of the Old and New Lake Suigetsu (Japan) Terrestrial Radiocarbon Calibration Data Sets
The varved sediment profile of Lake Suigetsu, central Japan, offers an ideal opportunity from which to derive a terrestrial record of atmospheric radiocarbon across the entire range of the 14 C dating method. Previous work by Kitagawa and van der Plicht (1998a,b, 2000) provided such a data set; however, problems with the varve-based age scale of their SG93 sediment core precluded the use of this data set for 14 C calibration purposes. Lake Suiget…
John Birks: Pioneer in quantitative palaeoecology
We describe the career of John Birks as a pioneering scientist who has, over a career spanning five decades, transformed palaeoecology from a largely descriptive to a rigorous quantitative science relevant to contemporary questions in ecology and environmental change. We review his influence on students and colleagues not only at Cambridge and Bergen Universities, his places of primary employment, but also on individuals and research groups in Eu…
A History of Human Impact on Moroccan Mountain Landscapes
Climatic variability, plasticity, and dispersal: A case study from Lake Tana, Ethiopia
Toward a late Quaternary tephrostratigraphic framework for connecting East African palaeoenvironmental archives
Abrupt or gradual? Change point analysis of the late Pleistocene–Holocene climate record from Chew Bahir, southern Ethiopia
We used a change point analysis on a late Pleistocene–Holocene lake-sediment record from the Chew Bahir basin in the southern Ethiopian Rift to determine the amplitude and duration of past climate transitions. The most dramatic changes occurred over 240 yr (from ~15,700 to 15,460 yr) during the onset of the African Humid Period (AHP), and over 990 yr (from ~4875 to 3885 yr) during its protracted termination. The AHP was interrupted by a distinct …
Reanalysis of the Atmospheric Radiocarbon Calibration Record from Lake Suigetsu, Japan
Terrestrial plant macrofossils from the sedimentary record of Lake Suigetsu, Japan, provide the only quasi-continuous direct atmospheric record of radiocarbon ( 14 C) covering the last 50 ka cal BP (Bronk Ramsey et al. 2012). Since then, new high precision data have become available on U-Th dated speleothems from Hulu Cave China, covering the same time range (Cheng et al. 2018). In addition, an updated varve-based chronology has also been publish…
The new Garba Guracha palynological sequence: Revision and data expansion
In the context of the DFG-funded project ‘Mountain Exile Hypothesis’ (FOR2358) we retrieved a 15.5 m long sediment core from Garba Guracha (GG) (Bale Mountains National Park, Ethiopia – BMNP) during February 2017. A 16,000 year record of 62 pollen samples has been previously produced from GG by Umer et al. (2007). In this data paper, we present a new palynological and macrocharcoal record, with 259 pollen and 1301 charcoal samples covering the la…
The Holocene lake-evaporation history of the afro-alpine Lake Garba Guracha in the Bale Mountains, Ethiopia, based on δ 18 O records of sugar biomarker and diatoms
In eastern Africa, there are few long, high-quality records of environmental change at high altitudes, inhibiting a broader understanding of regional climate change. We investigated a Holocene lacustrine sediment archive from Lake Garba Guracha, Bale Mountains, Ethiopia, (3,950 m asl), and reconstructed high-altitude lake evaporation history using δ 18 O records derived from the analysis of compound-specific sugar biomarkers and diatoms. The δ 18…
Paleo-Enso influence on African environmentsand early modern humans
lt;p>In this study, we synthesize terrestrial and marine proxy records, spanning the past 620,000 years, to decipher pan-African climate variability and its drivers and potential linkages to hominin evolution. We find a tight correlation between moisture availability across Africa to El Niño Southern Ocean oscillation (ENSO) variability, a manifestation of the Walker Circulation, that was most likely driven by changes in Earth’s eccentricity. Our…
Geography (22 works) · Geology and Paleoclimatology Research (22 works) · Physical geography (17 works) · Holocene (16 works) · Geology (13 works) · Ecology (11 works) · Archaeology and ancient environmental studies (10 works) · Climate change (10 works) · Pleistocene-Era Hominins and Archaeology (9 works) · Archaeology (8 works)