A5012351384- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Aquatic Ecosystems and Phytoplankton Dynamics
- Pacific and Southeast Asian Studies
- Archaeology and ancient environmental studies
- Water Quality Monitoring Technologies
- Soil and Water Nutrient Dynamics
- Metabolomics and Mass Spectrometry Studies
- Hydrological Forecasting Using AI
- Geological and Geophysical Studies
- Flood Risk Assessment and Management
- Geological Studies and Exploration
- Aquatic Invertebrate Ecology and Behavior
- Water resources management and optimization
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Groundwater flow and contamination studies
- Animal Ecology and Behavior Studies
- Pleistocene-Era Hominins and Archaeology
- Paleontology and Stratigraphy of Fossils
- Maritime and Coastal Archaeology
- Coastal wetland ecosystem dynamics
ETH Zurich
2019-2024
Swiss Federal Institute of Aquatic Science and Technology
2019-2024
Management Research Institute
2023
Geological Institute
2020
University of the Philippines Diliman
2015-2018
University of the Philippines System
2014
Abstract The Late Holocene marks a substantial cultural and economic transition in the eastern Eurasian Steppe Altai Region with dispersal of nomadic pastoralism. So far, paleoclimate conditions during this time remain unclear controversial. Here, we present high‐resolution 4.2 ka record from Lake Khar Nuur Mongolian that is based on lake sediment proxies biomarker compound‐specific δ 2 H analyses. Our results document increased aridity before ∼3.7 cal. BP, followed by two pronounced phases...
Mesomediterranean vegetation with abundant evergreen broadleaved trees and shrubs is dominant along the coast of northern Greece. Well-dated palynological records are available from inland submediterranean zone, where absent or rare, but less known about history coastal area. For instance, it unclear when why expanded during Holocene. Here we present a new record mesomediterranean site, Limni Volvi, near Aegean Sea. To understand Holocene history, combined palynology, microscopic charcoal...
Abstract Submarine fresh groundwater discharging from discrete zones such as conduits overlain by thick sediment remains poorly documented and understood despite common anecdotal accounts of it. We analyzed this phenomenon a suite variable‐density, variably saturated flow simulations guided field studies. The observations included point flux salinity measurements using seepage meters spread across the intertidal subtidal zones. discretely measured fluxes in region were high was those zone....
Calamba and Los Baños in Laguna Province, Philippines lie between the northern part of Mt. Makiling north shore de Bay. One significant activity province is development water resorts which includes hot springs spas. Presence due to geothermal activities area. This study seeks explore nature possible impacts groundwater utilization spring Province. also analyzes issues challenges implementation policies laws regulate use these resorts. These are estimated consume large volume could result...
Abstract. Hypolimnetic anoxia in eutrophic lakes can delay lake recovery to lower trophic states via the release of sediment phosphorus (P) surface waters on short timescales shallow lakes. However, long-term effects hypolimnetic redox conditions and state sedimentary P fraction retention deep are not clear yet. withdrawal P-rich water is predicted diminish seasonal recycling from hypolimnion. Nevertheless, there a lack evidence well-dated cores, particular lakes, about impact retention. In...
A multiproxy workflow was used to assess >60 plant protection products (PPPs) in sediment samples from a Swiss lake under heavy agricultural pressure. The results show the appearance of PPPs for first time early 1960s with an overall detection 34 and herbicides fungicides found equal proportions. Paleolimnological data [e.g., chronology, hyperspectral imaging sedimentary green pigments, semiquantitative elemental composition (μXRF scans)] suggest that PPP concentrations fluxes over are not...
Lacustrine alkenones are increasingly reported in freshwater lakes worldwide, which makes them a very promising proxy to reconstruct past continental temperatures. However, more systematic understanding of ecological preferences alkenone-producers at global scale is lacking, limits our as lakes. Here we investigated 56 Swiss and report Group 1 33 them. In twelve the containing alkenones, mixed 1/Group 2 alkenone signature was detected. We used random forest (RF) model investigate influence...
Semi-arid Mongolia is a highly sensitive region to climate changes, but the region’s Holocene paleoclimatic evolution and its underlying forcing mechanisms have been subject of much recent debate. Here we present continuous 7.4 ka sediment record from high-altitude Shireet Naiman Nuur (Nuur = lake) in central Mongolian Khangai Mountains. We extensively dated sediments analyzed elemental composition bulk isotopes for lake characterization. Our results show that 14 C-dating organic carbon...
A growing interest in lacustrine alkenones as a proxy for continental paleotemperature reconstructions accompanied important methodological improvements over the past two decades. New gas chromatography (GC) columns were used alkenone analysis, that drastically improved separation, especially freshwater lakes. However, these recent advances are sometimes not sufficient separating compounds interfere with resulting chromatograms and concurrently, new chemical procedures implemented to further...
Long-chain diols are biomarkers commonly used in the marine realm to reconstruct several environmental parameters such as sea surface temperature and salinity. However, they also produced lacustrine slow-flowing river environments, a characteristic that has proved be useful trace past riverine inputs coastal sedimentary records. So far, their use settings is sparse controls not well-known. Previous studies two lakes have shown long-chain diol distribution linked changes (in small Spanish...
Remote Oceania was among the last places settled by humans. However, timing of initial human settlements and early introduction horticulture remain debated. We retrieved a sediment core close to Teouma, oldest cemetery in that reveals evidence settlement, practice, concurrent climatic conditions on island Efate, Vanuatu. Sedimentary biomarkers indicating presence (coprostanol epicoprostanol), taro cultivation (palmitone), increase simultaneously, attesting first settlers. The precipitation...
Abstract. Hypolimnetic anoxia in eutrophic lakes can delay lake recovery to lower trophic states via the release of sediment phosphorus (P) surface waters on short time scales. However, effects hypolimnetic redox conditions and eutrophication long-term P-fraction retention are not clear yet. In this study, we investigated profiles since early 1900s from Lake Burgäschi, a deep, Swiss Plateau. The changes were assessed with respect evolution (sedimentary green-pigments proxy), oxygenation...
Over the past millennium, Pacific Islands have experienced significant transformations, caused by different waves of human settlement and climatic variability. However, paucity archeological records coupled with complex setting tropical hinders our understanding environmental societal changes. In this study, we employ a multi-proxy approach on sediment cores extracted from ponds west coast Espiritu Santo, Vanuatu to investigate human-climate dynamics. Through analysis human-associated...
A growing interest in lacustrine alkenones as a proxy for continental paleotemperature reconstructions led to important methodological improvements over the past two decades. New gas chromatography (GC) columns were developed and drastically improved alkenone analysis, especially freshwater lakes. However, these recent advances are sometimes not sufficient separating compounds that interfere with resulting chromatograms concurrently, new chemical procedures implemented further clean up...
The islands of Remote Oceania were among the last places on Earth colonised by humans. Lapita seafarers carrying with them an extensive root-tuber-tree crop complex and domestic animals, rapidly transformed nearly all these previously unoccupied islands. However, timing initial settlements early introduction horticulture remain a matter debate as significant changes in climate coincided human oceanic explorations mid-late Holocene. Here we show that fossil biomarkers preserved sedimentary...
Figure S 1: Core correlation between Burg17-C and Burg17-B (the dated core) sediment images.The core picture of is true color RGB (R: 640 nm, G: 545 B: 460 nm) linear-stretch image.The was taken with a Nikon D80 digital camera.
<p>Deep marine sediments may provide insights of past climate and oceanographic events. Knowledge the events can aid in scenario setting future their consequences. A deep sea sediment core from western side Bohol Sea, a marginal located south Philippines, was used to reconstruct precipitation identify impacts level rise on circulation Sea.  Five radiocarbon dates bulk organic matter age control spanning back Last Glacial Maximum. Sedimentological (lithics carbonate...