Ian Snowball
Biographic Data
| ID | 5600022 |
|---|---|
| NAME | Ian Snowball |
| GIVEN NAMES | Ian |
| FAMILY NAME | Snowball |
| SIGNATURE | SNOWBALL I |
| AFFILIATIONS | Lund University |
| ORCID | 0000-0002-6257-3088 |
| VERIFIED | Yes |
| TOTAL WORKS | 18 |
| TOTAL CITATIONS | 49 |
| AUTHOR COUNT | 18 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2021 |
| H-INDEX | 5 |
Enviromagnetic study of Late Quaternary environmental evolution in Lower Volga loess sequences, Russia
The late Quaternary development of the Lower Volga region of Russia is characterized by an alternating influence of marine and continental environments resulting from fluctuations in Caspian Sea level during the last glaciation. However, sediments deposited under continental conditions have received very little research attention compared to the under- and overlying marine deposits, such that even their origin is still in debate. Detailed magneti…
Is ‘deep-water formation’ in the Baltic Sea a key to understanding seabed dynamics and ventilation changes over the past 7,000 years
Echoes from the Past
Integrated sediment multiproxy studies and modeling were used to reconstruct past changes in the Baltic Sea ecosystem. Results of natural changes over the past 6000 years in the Baltic Sea ecosystem suggest that forecasted climate warming might enhance environmental problems of the Baltic Sea. Integrated modeling and sediment proxy studies reveal increased sea surface temperatures and expanded seafloor anoxia (in deep basins) during earlier natur…
Radiocarbon Wiggle-Match Dating of Bulk Sediments—How Accurate can It Be
We used the radiocarbon wiggle-match dating technique to date the varved sediments of Lake Gyltigesjön in southern Sweden with the main aim to construct an accurate chronology covering the period between about 3000 and 2000 cal BP. Wiggle-match dating was applied to bulk sediments to evaluate the possibility of constructing accurate chronologies in the absence of terrestrial plant macrofossils and when the amount of old carbon in the sediments is…
Coastal paleo-environment and sea-level change at Macassa Bay, southern Mozambique, since c 6600 cal BP
Drill cores from mega-paleo Lake Bungunnia
Early- and mid-Holocene palaeoenvironments as revealed by mineral magnetic, geochemical and palynological data of sediments from Bai Nuur and Ulan Nuur, southeastern inner Mongolia Plateau, China
Palaeomagnetic intensity data
Reconstructions of solar activity prior to AD 1600 rely on estimates of the past production rates of cosmogenic radionuclides in the Earth's atmosphere. These rates are modulated by the strength of the solar magnetic field and the intensity of the Earth's geomagnetic dipole. One of the largest uncertainties associated with these reconstructions originates from palaeointensity data and to show how errors in palaeomagnetic data influence reconstruc…
Climate change and human settlement as drivers of late-Holocene vegetational change in the Faroe Islands
Changes in Faroese land surfaces during the late Holocene reflect intimate interactions between cultural and environmental development. Analyses of fossil wood, pollen and plant macrofossils indicate that the present open landscape replaced shrubby vegetation that was present from c. 6000 BC Up to C. AD 660. Conditions altered during the late Holocene, with loss of woody vegetation and increasing erosion: trends that were initiated prior to human…
Palaeolimnological and sedimentary responses to Holocene forest retreat in the Scandes Mountains, west-central Sweden
A suite of analyses was performed on sediments accumulated during the last 10 700 years in Lake Spaime, a small, hydrologically open water body in the modem alpine tundra zone of the Scandes Mountains, west-central Sweden. The study aimed to evaluate (1) the nature of climate changes that forced the late-Holocene lowering of altitudinal tree limit in the region, the timing of which is known from prior studies based on radiocarbon dating of subfos…
Bacterial magnetite in Swedish varved lake-sediments
Documentation of the physical properties of annually laminated (varved) sediments at a sub-annual to decadal resolution for environmental interpretation
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that signi” cant environmental changes took place between c. 6000 and 5700 bc. This interval is characterized by an increase in mineral-matter accumulation, which is a proxy for winter-snow accumulation, and a statistically signi” cant decrease in total pollen in‘ ux (predominantly Pinus, Betula and A…
Geomagnetic field variations in northern Sweden during the Holocene quantified from varved lake sediments and their implications for cosmogenic nuclide production rates
Palaeomagnetic analyses were conducted on two varved lake-sediment sequences in northern Sweden. The magnetic properties of the sediment sequences are dominated by stable single-domain magnetite with characteristics typical of bacterial magnetosomes. Alternating field demagnetization measurements indicate that the single-domain magnetite is the dominant carrier of a stable natural remanent magnetization. Temporal variations in inclination and dec…
The mineral magnetic properties of an annually laminated Holocene lake-sediment sequence in northern Sweden
Detailed mineral magnetic measurements were conducted on a 9000-year varved lake sediment sequence in northern Sweden (Lake Sarsjön). The results demonstrate that the paramagnetic susceptibility reflects the concentration of detrital minerogenic material in the lake sediments, which is controlled to a large extent by the intensity of the spring snow melt. In contrast, the concentration of ferrimagnetic magnetite (reflected by initial magnetic sus…
Interpretation of the glacio lacustrine record in northern Sweden
Lake sediment studies of Holocene glacial activity in the Kårsa valley, northern Sweden
A multidisciplinary study of lake sediments deposited in lake basins in the Kårsa valley, northern Sweden, suggests the complete disappearance of the Kårsa glacier during the early and mid-Holocene. Glacier reformation, indicated by the deposition of sediment with a fine particle size distribution and low organic content in the three lakes, took place at c. 3000 14 C years BP. This interpretation contrasts with a study based on the weight loss-on…
A mineral magnetic study of Holocene sediment yields and deposition patterns in the Llyn Geirionydd catchment, north Wales
Mineral magnetic investigations of sediment cores and catchment materials from Llyn Geirionydd (north Wales) form the basis of a study of Holocene sediment yields and deposition patterns. Catchment soils and bedrock materials are highly variable in magnetic concentration. In contrast, the lake sediments are more homogenous in magnetic concentration. Magnetic hysteresis properties of catchment materials, bulk sediments and magnetic extracts demons…
Lake sediment studies of Holocene glacial activity in the Kårsa valley, northern Sweden
A multidisciplinary study of lake sediments deposited in lake basins in the Kårsa valley, northern Sweden, suggests the complete disappearance of the Kårsa glacier during the early and mid-Holocene. Glacier reformation, indicated by the deposition of sediment with a fine particle size distribution and low organic content in the three lakes, took place at c. 3000 14 C years BP. This interpretation contrasts with a study based on the weight loss-on…
Geomagnetic field variations in northern Sweden during the Holocene quantified from varved lake sediments and their implications for cosmogenic nuclide production rates
Palaeomagnetic analyses were conducted on two varved lake-sediment sequences in northern Sweden. The magnetic properties of the sediment sequences are dominated by stable single-domain magnetite with characteristics typical of bacterial magnetosomes. Alternating field demagnetization measurements indicate that the single-domain magnetite is the dominant carrier of a stable natural remanent magnetization. Temporal variations in inclination and dec…
The mineral magnetic properties of an annually laminated Holocene lake-sediment sequence in northern Sweden
Detailed mineral magnetic measurements were conducted on a 9000-year varved lake sediment sequence in northern Sweden (Lake Sarsjön). The results demonstrate that the paramagnetic susceptibility reflects the concentration of detrital minerogenic material in the lake sediments, which is controlled to a large extent by the intensity of the spring snow melt. In contrast, the concentration of ferrimagnetic magnetite (reflected by initial magnetic sus…
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that signi” cant environmental changes took place between c. 6000 and 5700 bc. This interval is characterized by an increase in mineral-matter accumulation, which is a proxy for winter-snow accumulation, and a statistically signi” cant decrease in total pollen in‘ ux (predominantly Pinus, Betula and A…
Climate change and human settlement as drivers of late-Holocene vegetational change in the Faroe Islands
Changes in Faroese land surfaces during the late Holocene reflect intimate interactions between cultural and environmental development. Analyses of fossil wood, pollen and plant macrofossils indicate that the present open landscape replaced shrubby vegetation that was present from c. 6000 BC Up to C. AD 660. Conditions altered during the late Holocene, with loss of woody vegetation and increasing erosion: trends that were initiated prior to human…
Echoes from the Past
Integrated sediment multiproxy studies and modeling were used to reconstruct past changes in the Baltic Sea ecosystem. Results of natural changes over the past 6000 years in the Baltic Sea ecosystem suggest that forecasted climate warming might enhance environmental problems of the Baltic Sea. Integrated modeling and sediment proxy studies reveal increased sea surface temperatures and expanded seafloor anoxia (in deep basins) during earlier natur…
Radiocarbon Wiggle-Match Dating of Bulk Sediments—How Accurate can It Be
We used the radiocarbon wiggle-match dating technique to date the varved sediments of Lake Gyltigesjön in southern Sweden with the main aim to construct an accurate chronology covering the period between about 3000 and 2000 cal BP. Wiggle-match dating was applied to bulk sediments to evaluate the possibility of constructing accurate chronologies in the absence of terrestrial plant macrofossils and when the amount of old carbon in the sediments is…
A mineral magnetic study of Holocene sediment yields and deposition patterns in the Llyn Geirionydd catchment, north Wales
Mineral magnetic investigations of sediment cores and catchment materials from Llyn Geirionydd (north Wales) form the basis of a study of Holocene sediment yields and deposition patterns. Catchment soils and bedrock materials are highly variable in magnetic concentration. In contrast, the lake sediments are more homogenous in magnetic concentration. Magnetic hysteresis properties of catchment materials, bulk sediments and magnetic extracts demons…
Lake sediment studies of Holocene glacial activity in the Kårsa valley, northern Sweden
A multidisciplinary study of lake sediments deposited in lake basins in the Kårsa valley, northern Sweden, suggests the complete disappearance of the Kårsa glacier during the early and mid-Holocene. Glacier reformation, indicated by the deposition of sediment with a fine particle size distribution and low organic content in the three lakes, took place at c. 3000 14 C years BP. This interpretation contrasts with a study based on the weight loss-on…
Interpretation of the glacio lacustrine record in northern Sweden
The mineral magnetic properties of an annually laminated Holocene lake-sediment sequence in northern Sweden
Detailed mineral magnetic measurements were conducted on a 9000-year varved lake sediment sequence in northern Sweden (Lake Sarsjön). The results demonstrate that the paramagnetic susceptibility reflects the concentration of detrital minerogenic material in the lake sediments, which is controlled to a large extent by the intensity of the spring snow melt. In contrast, the concentration of ferrimagnetic magnetite (reflected by initial magnetic sus…
Bacterial magnetite in Swedish varved lake-sediments
Documentation of the physical properties of annually laminated (varved) sediments at a sub-annual to decadal resolution for environmental interpretation
Rapid early-Holocene environmental changes in northern Sweden based on studies of two varved lake-sediment sequences
Mineral magnetic, organic carbon and pollen studies of two varved Holocene lake-sediment sequences in the boreal forest of northern Sweden indicate that signi” cant environmental changes took place between c. 6000 and 5700 bc. This interval is characterized by an increase in mineral-matter accumulation, which is a proxy for winter-snow accumulation, and a statistically signi” cant decrease in total pollen in‘ ux (predominantly Pinus, Betula and A…
Geomagnetic field variations in northern Sweden during the Holocene quantified from varved lake sediments and their implications for cosmogenic nuclide production rates
Palaeomagnetic analyses were conducted on two varved lake-sediment sequences in northern Sweden. The magnetic properties of the sediment sequences are dominated by stable single-domain magnetite with characteristics typical of bacterial magnetosomes. Alternating field demagnetization measurements indicate that the single-domain magnetite is the dominant carrier of a stable natural remanent magnetization. Temporal variations in inclination and dec…
Palaeolimnological and sedimentary responses to Holocene forest retreat in the Scandes Mountains, west-central Sweden
A suite of analyses was performed on sediments accumulated during the last 10 700 years in Lake Spaime, a small, hydrologically open water body in the modem alpine tundra zone of the Scandes Mountains, west-central Sweden. The study aimed to evaluate (1) the nature of climate changes that forced the late-Holocene lowering of altitudinal tree limit in the region, the timing of which is known from prior studies based on radiocarbon dating of subfos…
Climate change and human settlement as drivers of late-Holocene vegetational change in the Faroe Islands
Changes in Faroese land surfaces during the late Holocene reflect intimate interactions between cultural and environmental development. Analyses of fossil wood, pollen and plant macrofossils indicate that the present open landscape replaced shrubby vegetation that was present from c. 6000 BC Up to C. AD 660. Conditions altered during the late Holocene, with loss of woody vegetation and increasing erosion: trends that were initiated prior to human…
Palaeomagnetic intensity data
Reconstructions of solar activity prior to AD 1600 rely on estimates of the past production rates of cosmogenic radionuclides in the Earth's atmosphere. These rates are modulated by the strength of the solar magnetic field and the intensity of the Earth's geomagnetic dipole. One of the largest uncertainties associated with these reconstructions originates from palaeointensity data and to show how errors in palaeomagnetic data influence reconstruc…
Coastal paleo-environment and sea-level change at Macassa Bay, southern Mozambique, since c 6600 cal BP
Drill cores from mega-paleo Lake Bungunnia
Early- and mid-Holocene palaeoenvironments as revealed by mineral magnetic, geochemical and palynological data of sediments from Bai Nuur and Ulan Nuur, southeastern inner Mongolia Plateau, China
Radiocarbon Wiggle-Match Dating of Bulk Sediments—How Accurate can It Be
We used the radiocarbon wiggle-match dating technique to date the varved sediments of Lake Gyltigesjön in southern Sweden with the main aim to construct an accurate chronology covering the period between about 3000 and 2000 cal BP. Wiggle-match dating was applied to bulk sediments to evaluate the possibility of constructing accurate chronologies in the absence of terrestrial plant macrofossils and when the amount of old carbon in the sediments is…
Echoes from the Past
Integrated sediment multiproxy studies and modeling were used to reconstruct past changes in the Baltic Sea ecosystem. Results of natural changes over the past 6000 years in the Baltic Sea ecosystem suggest that forecasted climate warming might enhance environmental problems of the Baltic Sea. Integrated modeling and sediment proxy studies reveal increased sea surface temperatures and expanded seafloor anoxia (in deep basins) during earlier natur…
Is ‘deep-water formation’ in the Baltic Sea a key to understanding seabed dynamics and ventilation changes over the past 7,000 years
Enviromagnetic study of Late Quaternary environmental evolution in Lower Volga loess sequences, Russia
The late Quaternary development of the Lower Volga region of Russia is characterized by an alternating influence of marine and continental environments resulting from fluctuations in Caspian Sea level during the last glaciation. However, sediments deposited under continental conditions have received very little research attention compared to the under- and overlying marine deposits, such that even their origin is still in debate. Detailed magneti…
Geology (17 works) · Geology and Paleoclimatology Research (17 works) · Paleontology (14 works) · Geomagnetism and Paleomagnetism Studies (12 works) · Sediment (12 works) · Holocene (11 works) · Geological formations and processes (10 works) · Geography (9 works) · Oceanography (7 works) · Geomorphology (6 works)