Roland Zech
Biographic Data
| ID | 5598459 |
|---|---|
| NAME | Roland Zech |
| GIVEN NAMES | Roland |
| FAMILY NAME | Zech |
| SIGNATURE | ZECH R |
| AFFILIATIONS | ETH Zurich |
| ORCID | 0000-0002-4267-1350 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 1 |
| AUTHOR COUNT | 16 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2005 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
The Holocene formation of inland sand dunes in the North of Schleswig-Holstein (Northern Germany) and its palaeoenvironmental significance
Geomorphological investigations were carried out in the Süderlügum inland dune field and at two existing dune outcrops near Enge-Sande (North Frisia). The focus was on the age of the dunes, possible anthropogenic or climatically induced reactivation phases and their triggers against the backdrop of a palaeoenvironmental reconstruction. To this end, corings and outcrops were created, which were described and classified in terms of soil geography. …
Assessing Lock-in Depth and Establishing a Late Holocene Paleomagnetic Secular Variation Record From the Mongolian Altai
Although paleomagnetic secular variations (PSV) often corroborate radiocarbon ( 14 C)-based lacustrine sediment chronologies, this is not the case at the high-altitude site Khar Nuur in the Mongolian Altai Mountains. Our results show that the inclination pattern resembles those from a regional reference record from Shireet Naiman Nuur and global geomagnetic field models very well, but with a constant offset of 730 ± 90 yr. Possible reservoir effe…
Evidence for strong relations between the upper Tagus loess formation (central Iberia) and the marine atmosphere off the Iberian margin during the last glacial period
During glacial times, the North Atlantic region was affected by serious climate changes corresponding to Dansgaard-Oeschger cycles that were linked to dramatic shifts in sea temperature and moisture transfer to the continents. However, considerable efforts are still needed to understand the effects of these shifts on terrestrial environments. In this context, the Iberian Peninsula is particularly interesting because of its close proximity to the …
Approaches and challenges to the study of loess—Introduction to the LoessFest Special Issue
In September 2016, the annual meeting of the International Union for Quaternary Research’s Loess and Pedostratigraphy Focus Group, traditionally referred to as a LoessFest, met in Eau Claire, Wisconsin, USA. The 2016 LoessFest focused on “thin” loess deposits and loess transportation surfaces. This LoessFest included 75 registered participants from 10 countries. Almost half of the participants were from outside the United States, and 18 of the pa…
Comparative 14 C and OSL dating of loess-paleosol sequences to evaluate post-depositional contamination of n -alkane biomarkers
There is an ongoing controversial discussion as to whether n- alkane lipid biomarkers—and organic matter of loess in general—reflect a synsedimentary paleoenvironmental/climate signal or whether they are significantly affected by postdepositional “contamination,” for example related to root and rhizomicrobial activity. In order to address this issue at our study site (the Middle to Late Weichselian loess-paleosol sequence Gleina in Saxony, German…
Late Quaternary relative humidity changes from Mt. Kilimanjaro, based on a coupled 2H-18O biomarker paleohygrometer approach
Radiocarbon Dating of Leaf Waxes in the Loess-Paleosol Sequence Kurtak, Central Siberia
Loess-paleosol sequences (LPS) are valuable archives for Quaternary climate and environmental changes. So far, LPS are generally dated using luminescence, with ~10% uncertainties, or radiocarbon ( 14 C) analyses in the rare cases that charcoal or macrofossils are available. For this study, we determined 14 C ages of leaf waxes (long-chain n -alkanes) extracted from the LPS Kurtak in central Siberia. 14 C ages range from 16.7 to 22.9 ka cal BP for…
Evidence for humid conditions during the last glacial from leaf wax patterns in the loess–paleosol sequence El Paraíso, Central Spain
A late pleistocene glacial chronology from the Kitschi-Kurumdu Valley, Tien Shan (Kyrgyzstan), based on 10 Be surface exposure dating
Surface exposure dating has become a helpful tool for establishing numeric glacial chronologies, particularly in arid high-mountain regions where radiocarbon dating is challenging due to limited availability of organic material. This study presents 13 new 10 Be surface exposure ages from the Kitschi-Kurumdu Valley in the At Bashi Range, Tien Shan. Three moraines were dated to ~ 15, 21 and > 56 ka, respectively, and corroborate previous findings t…
The late Pleistocene glaciation in the Bogchigir Valleys (Pamir, Tajikistan) based on 10 Be surface exposure dating
Glacial chronologies from the Pamir may not only provide insights into past changes in temperature, but also into past changes in precipitation related to the northern-hemispheric westerlies and the monsoonal circulation. We present 18 new exposure ages from the Bogchigir Valleys that complement and refine our previous studies in these valleys. The most extensive dated glaciation in the area occurred ~ 100 ka, during Marine Oxygen Isotope Stage (…
Compound-specific δD in a loess-paleosol on Mt Kilimanjaro – A record of the Indian Ocean Dipole during the Late Quaternary
Early Last Glacial Maximum in the Kitschi-Kurumdu Valley, Tien Shan, based on 10Be surface exposure dating
A permafrost glacial hypothesis – Did permafrost carbon dynamics control atmospheric CO2 and Pleistocene climate
Reconstruction of a complex late Quaternary glacial landscape in the Cordillera de Cochabamba (Bolivia) based on a morphostratigraphic and multiple dating approach
Although glacial landscapes have previously been used for the reconstruction of late Quaternary glaciations in the Central Andes, only few data exist for the Eastern Cordillera in Bolivia. Here, we present results from detailed morphostratigraphic mapping and new data of surface exposure dating (SED), optically stimulated luminescence (OSL), and radiocarbon dating ( 14 C) from the Huara Loma Valley, Cordillera de Cochabamba (Bolivia). Discrepanci…
Late Quaternary environmental changes in Misiones, subtropical NE Argentina, deduced from multi-proxy geochemical analyses in a palaeosol-sediment sequence
Late Quaternary glacial and climate history of the Pamir Mountains derived from cosmogenic 10 Be exposure ages
Moraines southwest of Lake Yashilkul, Pamir, Tajikistan, were dated using 10 Be exposure ages of boulder surfaces. We found evidence for (1) an extensive glaciation ∼60,000 yr ago; (2) a less extensive glacial advance, which deposited a characteristic hummocky moraine lobe with exposure ages ranging from ∼11,000 to 47,000 yr, probably deposited at or before 47,000 yr ago; and (3) lateral moraines with exposure ages of ∼40,000 yr, 27,000 yr and 19…
Radiocarbon Dating of Leaf Waxes in the Loess-Paleosol Sequence Kurtak, Central Siberia
Loess-paleosol sequences (LPS) are valuable archives for Quaternary climate and environmental changes. So far, LPS are generally dated using luminescence, with ~10% uncertainties, or radiocarbon ( 14 C) analyses in the rare cases that charcoal or macrofossils are available. For this study, we determined 14 C ages of leaf waxes (long-chain n -alkanes) extracted from the LPS Kurtak in central Siberia. 14 C ages range from 16.7 to 22.9 ka cal BP for…
Late Quaternary glacial and climate history of the Pamir Mountains derived from cosmogenic 10 Be exposure ages
Moraines southwest of Lake Yashilkul, Pamir, Tajikistan, were dated using 10 Be exposure ages of boulder surfaces. We found evidence for (1) an extensive glaciation ∼60,000 yr ago; (2) a less extensive glacial advance, which deposited a characteristic hummocky moraine lobe with exposure ages ranging from ∼11,000 to 47,000 yr, probably deposited at or before 47,000 yr ago; and (3) lateral moraines with exposure ages of ∼40,000 yr, 27,000 yr and 19…
Late Quaternary environmental changes in Misiones, subtropical NE Argentina, deduced from multi-proxy geochemical analyses in a palaeosol-sediment sequence
Reconstruction of a complex late Quaternary glacial landscape in the Cordillera de Cochabamba (Bolivia) based on a morphostratigraphic and multiple dating approach
Although glacial landscapes have previously been used for the reconstruction of late Quaternary glaciations in the Central Andes, only few data exist for the Eastern Cordillera in Bolivia. Here, we present results from detailed morphostratigraphic mapping and new data of surface exposure dating (SED), optically stimulated luminescence (OSL), and radiocarbon dating ( 14 C) from the Huara Loma Valley, Cordillera de Cochabamba (Bolivia). Discrepanci…
A late pleistocene glacial chronology from the Kitschi-Kurumdu Valley, Tien Shan (Kyrgyzstan), based on 10 Be surface exposure dating
Surface exposure dating has become a helpful tool for establishing numeric glacial chronologies, particularly in arid high-mountain regions where radiocarbon dating is challenging due to limited availability of organic material. This study presents 13 new 10 Be surface exposure ages from the Kitschi-Kurumdu Valley in the At Bashi Range, Tien Shan. Three moraines were dated to ~ 15, 21 and > 56 ka, respectively, and corroborate previous findings t…
The late Pleistocene glaciation in the Bogchigir Valleys (Pamir, Tajikistan) based on 10 Be surface exposure dating
Glacial chronologies from the Pamir may not only provide insights into past changes in temperature, but also into past changes in precipitation related to the northern-hemispheric westerlies and the monsoonal circulation. We present 18 new exposure ages from the Bogchigir Valleys that complement and refine our previous studies in these valleys. The most extensive dated glaciation in the area occurred ~ 100 ka, during Marine Oxygen Isotope Stage (…
Compound-specific δD in a loess-paleosol on Mt Kilimanjaro – A record of the Indian Ocean Dipole during the Late Quaternary
Early Last Glacial Maximum in the Kitschi-Kurumdu Valley, Tien Shan, based on 10Be surface exposure dating
A permafrost glacial hypothesis – Did permafrost carbon dynamics control atmospheric CO2 and Pleistocene climate
Evidence for humid conditions during the last glacial from leaf wax patterns in the loess–paleosol sequence El Paraíso, Central Spain
Comparative 14 C and OSL dating of loess-paleosol sequences to evaluate post-depositional contamination of n -alkane biomarkers
There is an ongoing controversial discussion as to whether n- alkane lipid biomarkers—and organic matter of loess in general—reflect a synsedimentary paleoenvironmental/climate signal or whether they are significantly affected by postdepositional “contamination,” for example related to root and rhizomicrobial activity. In order to address this issue at our study site (the Middle to Late Weichselian loess-paleosol sequence Gleina in Saxony, German…
Late Quaternary relative humidity changes from Mt. Kilimanjaro, based on a coupled 2H-18O biomarker paleohygrometer approach
Radiocarbon Dating of Leaf Waxes in the Loess-Paleosol Sequence Kurtak, Central Siberia
Loess-paleosol sequences (LPS) are valuable archives for Quaternary climate and environmental changes. So far, LPS are generally dated using luminescence, with ~10% uncertainties, or radiocarbon ( 14 C) analyses in the rare cases that charcoal or macrofossils are available. For this study, we determined 14 C ages of leaf waxes (long-chain n -alkanes) extracted from the LPS Kurtak in central Siberia. 14 C ages range from 16.7 to 22.9 ka cal BP for…
Approaches and challenges to the study of loess—Introduction to the LoessFest Special Issue
In September 2016, the annual meeting of the International Union for Quaternary Research’s Loess and Pedostratigraphy Focus Group, traditionally referred to as a LoessFest, met in Eau Claire, Wisconsin, USA. The 2016 LoessFest focused on “thin” loess deposits and loess transportation surfaces. This LoessFest included 75 registered participants from 10 countries. Almost half of the participants were from outside the United States, and 18 of the pa…
Evidence for strong relations between the upper Tagus loess formation (central Iberia) and the marine atmosphere off the Iberian margin during the last glacial period
During glacial times, the North Atlantic region was affected by serious climate changes corresponding to Dansgaard-Oeschger cycles that were linked to dramatic shifts in sea temperature and moisture transfer to the continents. However, considerable efforts are still needed to understand the effects of these shifts on terrestrial environments. In this context, the Iberian Peninsula is particularly interesting because of its close proximity to the …
Assessing Lock-in Depth and Establishing a Late Holocene Paleomagnetic Secular Variation Record From the Mongolian Altai
Although paleomagnetic secular variations (PSV) often corroborate radiocarbon ( 14 C)-based lacustrine sediment chronologies, this is not the case at the high-altitude site Khar Nuur in the Mongolian Altai Mountains. Our results show that the inclination pattern resembles those from a regional reference record from Shireet Naiman Nuur and global geomagnetic field models very well, but with a constant offset of 730 ± 90 yr. Possible reservoir effe…
The Holocene formation of inland sand dunes in the North of Schleswig-Holstein (Northern Germany) and its palaeoenvironmental significance
Geomorphological investigations were carried out in the Süderlügum inland dune field and at two existing dune outcrops near Enge-Sande (North Frisia). The focus was on the age of the dunes, possible anthropogenic or climatically induced reactivation phases and their triggers against the backdrop of a palaeoenvironmental reconstruction. To this end, corings and outcrops were created, which were described and classified in terms of soil geography. …
Geology and Paleoclimatology Research (16 works) · Geography (12 works) · Physical geography (12 works) · Glacial period (10 works) · Pleistocene-Era Hominins and Archaeology (9 works) · Geology (8 works) · Geology (7 works) · Holocene (7 works) · Last Glacial Maximum (7 works) · Loess (7 works)