A5066038767- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Geophysics and Gravity Measurements
- Marine and environmental studies
- Pleistocene-Era Hominins and Archaeology
- Climate variability and models
- Geological Studies and Exploration
- Climate change and permafrost
- Arctic and Antarctic ice dynamics
- Evolution and Paleontology Studies
- Hydrocarbon exploration and reservoir analysis
- Oceanographic and Atmospheric Processes
- earthquake and tectonic studies
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Geophysical and Geoelectrical Methods
- Coastal and Marine Dynamics
- High-pressure geophysics and materials
- Geological and Geophysical Studies Worldwide
- Karst Systems and Hydrogeology
- Big Data and Digital Economy
Kumamoto University
2021-2025
International University of Kagoshima
2023-2024
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2017-2023
University of Bremen
2019-2023
Bolin Centre for Climate Research
2016
Stockholm University
2016
Australian National University
2013-2016
University of Manitoba
2006-2009
Geological Survey of Canada
2009
Dublin Institute For Advanced Studies
2009
Abstract The evolution of past global ice sheets is highly uncertain. One example the missing problem during Last Glacial Maximum (LGM, 26 000-19 000 years before present) – an apparent 8-28 m discrepancy between far-field sea level indicators and modelled from sheet reconstructions. In absence reconstructions, researchers often use marine δ 18 O proxy records to infer volume prior LGM. We present a reconstruction for 80 years, called PaleoMIST 1.0, constructed independently records. Our...
Abstract Recent evidence shows that wind‐driven ocean currents, like the western boundary are strongly affected by global warming. However, due to insufficient observations both on temporal and spatial scales, impact of climate change large‐scale gyres is still not clear. Here, based satellite sea surface height temperature, we find a consistent poleward shift major gyres. Due strong natural variability, most observed gyre shifts statistically significant, implying variations may contribute...
Abstract The Asian monsoon (AM) played an important role in the dynastic history of China, yet it remains unknown whether AM-mediated shifts Chinese societies affect earth surface processes to point exceeding natural variability. Here, we present a dust storm intensity record dating back first unified dynasty China (the Qin Dynasty, 221–207 B.C.E.). Marked increases activity coincided with dynasties large populations during strong AM periods. By contrast, reduced corresponded decreased...
Abstract An abundance of evidence indicates that the tropics are expanding. Despite many attempts to decipher cause, underlying dynamical mechanism driving tropical expansion is still not entirely clear. Here, based on observations, multimodel simulations from Coupled Model Intercomparison Project phase 5 (CMIP5) and purposefully designed numerical experiments, variations trends width explored a regional perspective. We find closely follows displacement oceanic midlatitude meridional...
Late glacial sea level curves located in the Cascadia subduction zone (CSZ) fore arc southwestern British Columbia show that isostatic adjustment (GIA) was rapid when Cordilleran Ice Sheet collapsed late Pleistocene. GIA modeling with a linear Maxwell rheology indicates observations can be equally well fit across wide range of asthenospheric thicknesses, provided viscosity is varied from 3 × 10 18 Pa s for thin (140 km) asthenosphere to 4 19 thick (380 asthenosphere. Present‐day vertical...
Abstract. Rapid monsoon changes since the last deglaciation remain poorly constrained due to scarcity of geological archives. Here we present a high-resolution scanning X-ray fluorescence (XRF) analysis 13.5 m terrace succession on western Chinese Loess Plateau (CLP) infer rapid deglaciation. Our results indicate that Rb∕Sr and Zr∕Rb are sensitive indicators chemical weathering wind sorting, respectively, which further linked strength East Asian summer (EASM) winter (EAWM). During...
ABSTRACT The evolution of Northern Hemisphere ice sheets through the last glacial cycle is simulated with index method by using climate forcing from one General Circulation Model, COSMOS. By comparing results to geological reconstructions, we first show that modelled capable capturing main features ice-sheet evolution. However, large deviations exist, likely due absence nonlinear interactions between sheet and other components. model uncertainties are examined output nine models Paleoclimate...
Using transient climate forcing based on simulations from the Alfred Wegener Institute Earth System Model (AWI-ESM), we simulate evolution of Greenland Ice Sheet (GrIS) last interglacial (125 ka, kiloyear before present) to 2100 AD with Parallel (PISM). The impact paleoclimate, especially Holocene climate, present and future GrIS is explored. Our past show close agreement reconstructions respect recent timing peaks in ice volume Greenland. maximum minimum at around 18–17 ka 6–5 lag...
Abstract. During the Late Pleistocene and Holocene retreat of paleo-ice sheets in North America Europe, vast proglacial lakes existed along land terminating margins. These impacted ice sheet dynamics by imposing boundary conditions analogous to a marine margin. Such lacustrine cause changes geometry, stress balance frontal ablation therefore affect mass entire sheet. Despite this, dynamically evolving have rarely been considered detail modeling endeavors. In this study, we describe...
Starting ~20,000 years ago, the North American Ice-sheet Complex receded. As it did, its meltwater formed proglacial lakes, altered water tables, and flowed through rivers to sea. These waters in turn shaped landscape ocean circulation. Here we reconstruct spatially resolved pattern of wetlands, river discharge using an updated modeling approach. We Laurentide Ice Sheet ICESHEET v2.0, which prescribes a basal stress field mapped ice margins produce maps steady-state thickness. After...
Abstract. We describe a program that produces paleo-ice sheet reconstructions using an assumption of steady-state, perfectly plastic ice flow behaviour. It incorporates three input parameters: margin, basal shear stress and topography. Though it is unlikely sheets were ever in complete steady-state conditions, this method can produce without relying on complicated unconstrained parameters such as climate dynamics. This makes advantageous to use glacial-isostatic adjustment modelling, which...
Abstract. Coastal southeast South America is one of the classic locations where there are robust, spatially extensive records past high sea level. Sea-level proxies interpreted as last interglacial (Marine Isotope Stage 5e, MIS 5e) exist along length Uruguayan and Argentinian coast with exceptional preservation especially in Patagonia. Many coastal deposits correlated to 5e solely because they form next-highest terrace level above Holocene highstand; however, dating control exists for some...
Geological indicators of past relative sea level changes are fundamental to reconstruct the extent former ice sheet during interglacials, which considered analogs for future climate conditions.Four dating from Holocene Pliocene, have left sea-level imprints in proximity coastal town Camarones Central Patagonia, Argentina.Sea-level index points were preserved as beach ridges deposited by storm waves above modern level.We used highly accurate survey techniques measure elevation these...
Previous modelling efforts have investigated climate responses to different Milankovitch forcing during Marine Isotope Stage (MIS) 13. During this time the has been highly variable at atmospheric CO2 concentrations of ~240 ppm. As yet, ice sheet-climate feedbacks were missing in previous studies. Therefore we use state-of-the-art coupled climate-ice sheet model, AWI-ESM-1.2, investigate MIS-13 and corresponding Northern Hemisphere (NHIS) evolution by performing simulations under three...
Abstract. Because global sea level during the last interglacial (LIG; 130–115 ka) was higher than today, LIG is a useful approximate analogue for improving predictions of future sea-level rise. Here, we synthesize proxies in glaciated Northern Hemisphere inclusion World Atlas Last Interglacial Shorelines (WALIS) database. We describe 82 sites from Russia, northern Europe, Greenland and North America variety settings, including boreholes, riverbank exposures along coastal cliffs. Marine...