A5057827069- Geology and Paleoclimatology Research
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Meteorological Phenomena and Simulations
- Isotope Analysis in Ecology
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Geological Studies and Exploration
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Paleontology and Stratigraphy of Fossils
- Pleistocene-Era Hominins and Archaeology
- Marine and coastal ecosystems
- Climate change and permafrost
- Archaeology and ancient environmental studies
- Amazonian Archaeology and Ethnohistory
- Geological and Geophysical Studies
- Groundwater and Isotope Geochemistry
- Evaluation Methods in Various Fields
- Aeolian processes and effects
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Geomagnetism and Paleomagnetism Studies
- Fluid Dynamics and Thin Films
University of Miami
2022-2024
Woods Hole Oceanographic Institution
2024
Nanjing University of Information Science and Technology
2015-2023
The Ohio State University
2018-2023
University of Wollongong
2023
NSF National Center for Atmospheric Research
2023
Laoshan Laboratory
2023
Qingdao National Laboratory for Marine Science and Technology
2020-2021
Antarctic paleotemperatures It has been widely thought that East Antarctica was ∼9°C cooler during the Last Glacial Maximum, close to ∼10°C difference between then and now determined independently for West Antarctica. Buizert et al. used borehole thermometry, firn density reconstructions, climate modeling show temperature in actually only ∼4° 7°C Maximum. This result important consequences our understanding of climate, polar amplification, global change. Science , abd2897, this issue p. 1097
Pan-Asian monsoon water isotope variability is found accompanied by a continental-scale hydroclimate footprint.
Abstract The sea surface temperature (SST) in the subpolar North Atlantic decreased during past century, a remarkable feature known as “warming hole (WH).” It is commonly claimed that WH results from slowdown of meridional overturning circulation. However, using an ensemble Community Earth System Model coupled to slab ocean model simulation, we show atmosphere alone can account for ∼50% observed cooling trend and ∼90% relative change global ocean. We find this caused by increased local...
Glacial wintertime sea ice mutes abrupt Heinrich Stadial 1 cooling in Greenland oxygen isotope records.
Abstract Recent paleoclimate reconstructions have suggested millennial‐scale variability in the Indo‐Pacific Warm Pool region coincident with events of last deglaciation. Here, we present a new stalagmite oxygen isotope record from northern Borneo, which today is located near center region's mean annual intertropical convergence zone. The spans full deglaciation, and reveals for first time distinct variations at this location connected Bølling‐Allerød onset Younger Dryas event. deglaciation...
Abstract Long-standing interpretations of the Last Glacial Maximum (21,000 ± 2000 years ago) in Australia suggest that period was extremely cold and arid, during which Indo-Australian summer monsoon system collapsed, human populations declined retreated to ecological refuges survive. Here, we use transient iTRACE simulations, combined with palaeoclimate proxy records archaeological data re-interpret late terminal Pleistocene – 11,000 years) Australia. The model suggests climates peak were...
Proxy reconstructions suggest that increasing global mean sea surface temperature (GMSST) during the last deglaciation was accompanied by a comparable or greater increase in ocean (GMOT), corresponding to large heat storage efficiency (HSE; ∆GMOT/∆GMSST). An increased GMOT is commonly attributed warming at sites of deepwater formation, but winter ice covered much these source areas deglaciation, which would imply an HSE less than 1. Here, we use climate model simulations and proxy-based...
Abstract Insolation changes play an important role in driving monsoon at orbital time scales. One key issue that has remained outstanding is whether the Asian driven by local insolation from Northern Hemisphere (NH) or remote Southern (SH) band. Here, we perform a set of sensitivity experiments to quantify impacts and on Afro‐Asian summer 11 ka BP relative present. We show overwhelmingly precession induced change tropical‐subtropical NH. The NH high latitudes also affects monsoon. In...
Abstract The Atlantic multidecadal variability (AMV) – a basin-scale sea surface temperature (SST) fluctuation in the has dramatic influences on climate 1–8 . Understanding its causes important social-ecological implications. However, driver of AMV and impacts remains debated because limitations current models 9–13 Here we identify systematic interhemispheric SST bias CMIP6 that biased trends large-scale atmospheric circulation rainfall simulations. After removing bias, find simulated...
Abstract The deglacial hydroclimate in South China remains a long-standing topic of debate due to the lack reliable moisture proxies and inconsistent model simulations. A recent proxy suggests that became wet cold stadials during last deglaciation, with intensification proposed be contributed mostly by East Asian summer monsoon (EASM). Here, based on simulation state-of-the-art climate well reproduces evolution EASM, winter (EAWM) associated water isotopes Asia, we propose intensified is...
The northern North Atlantic (NNA) subsurface temperature in response to the slowdown of meridional overturning circulation (AMOC) is crucial for ice sheet calving and recovery AMOC Heinrich events. Paleoclimate proxies modeling studies suggest that NNA exhibits a robust warming during 1, but with less clear Younger Dryas (YD). mechanism potentially different responses has remained not well understood. Previous show depending on hosing at locations. Here, by examining suite "water-hosing"...
Abstract The response of the atmospheric energy (heat) transport (AHT) to a perturbation oceanic heat (OHT) is studied theoretically in zonal mean balance model, with focus on effect climate feedback, especially its spatial variation, Bjerknes compensation (BJC). It found that BJC depends critically feedback. For stable climate, which negative feedback dominant, AHT always compensates OHT opposite direction. Furthermore, if local everywhere, will be weaker than (undercompensation) because...
Abstract. The last deglaciation (∼20–11 ka BP) is a period of major, long-term climate transition from glacial to interglacial state that features multiple centennial- decadal-scale abrupt variations whose root cause still not fully understood. To better understand this time period, the Paleoclimate Modelling Intercomparison Project (PMIP) has provided framework for an internationally coordinated endeavour in simulating whilst encompassing broad range models. Here, we present multi-model...
Pleistocene Ice Ages display abrupt Dansgaard–Oeschger (DO) climate oscillations that provide prime examples of Earth System tipping points—abrupt transition may result in irreversible change. Greenland ice cores key records DO variability, but gas-calibrated estimates the temperature change magnitudes have been limited to central and northwest Greenland. Here, we present ice-core δ 15 N-N 2 from south (Dye 3) coastal east (Renland) calibrate local water isotope thermometer a Greenland-wide...
Abstract Statistical model results suggest that the declining growth rate from autumn to spring is key cause El Niño‐Southern Oscillation (ENSO) persistence barrier (SPB). Using a dynamical approach, we develop physical mechanisms responsible for ENSO SPB in framework of recharge oscillator by adding seasonally varying Bjerknes (BJ) stability index and linking it with rate. By decomposing BJ index, indicated seasonal thermodynamic damping thermocline positive feedback play an important role...
Abstract Reconstructing the history of polar temperature from ice core water isotope ( δ 18 O) calibration has remained a challenge in paleoclimate research, because our incomplete understanding various temperature– O relationships. This paper resolves this classical problem new framework called unified slope equations (USE), which illustrates general relations among spatial and temporal O–surface slopes. The USE is applied to Antarctica change during last deglaciation model simulations...
Abundant proxy records suggest a profound reorganization of the Atlantic Meridional Overturning Circulation (AMOC) during Last Glacial Maximum (LGM, ~21,000 y ago), with North Deep Water (NADW) shoaling significantly relative to present-day (PD) and forming Intermediate (GNAIW). However, almost all previous observational modeling studies have focused on zonal mean two-dimensional AMOC feature, while recent progress in understanding modern reveals more complicated three-dimensional structure,...
Abstract We present a theoretical study on local and remote responses of atmosphere ocean meridional heat transports (AHT OHT, respectively) to climate forcing in coupled energy balance model. show that, general, surface flux forces opposite AHT OHT the so-called compensation response, while net into system same direction collaboration response. Furthermore, unless oceanic thermohaline circulation is significantly changed, response far away from region tends be dominated by because effective...