A5045074166- Climate variability and models
- Geology and Paleoclimatology Research
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Atmospheric chemistry and aerosols
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Climate change and permafrost
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Evolution and Paleontology Studies
- Geological Studies and Exploration
- Cryospheric studies and observations
- Marine and coastal ecosystems
- Tree-ring climate responses
- Geological formations and processes
- Isotope Analysis in Ecology
- Ocean Waves and Remote Sensing
- Trauma and Emergency Care Studies
- Species Distribution and Climate Change
- Case Reports on Hematomas
University of Tsukuba
2016-2025
Scripps Institution of Oceanography
2016-2019
University of California, San Diego
2016-2019
Meteorological Research Institute
2019
University of North Carolina at Chapel Hill
2019
The University of Tokyo
2012-2016
National Institute for Environmental Studies
2013-2016
Abstract An unprecedentedly large ensemble of climate simulations with a 60-km atmospheric general circulation model and dynamical downscaling 20-km regional has been performed to obtain probabilistic future projections low-frequency local-scale events. The the latter half twentieth century, 4 K warmer than preindustrial climate, century without historical trends associated anthropogenic effect are each simulated for more 5,000 years. From simulations, changes in extreme events available...
Abstract. Climate and environments of the mid-Pliocene warm period (3.264 to 3.025 Ma) have been extensively studied. Whilst numerical models shed light on nature climate at time, uncertainties in their predictions not systematically examined. The Pliocene Model Intercomparison Project quantifies model outputs through a coordinated multi-model multi-model/data intercomparison. commonalities for are clearly evident, we show substantial variation sensitivity implementation boundary conditions....
Abstract. The Pliocene epoch has great potential to improve our understanding of the long-term climatic and environmental consequences an atmospheric CO2 concentration near ∼400 parts per million by volume. Here we present large-scale features climate as simulated a new ensemble models varying complexity spatial resolution based on reconstructions boundary conditions (the Model Intercomparison Project Phase 2; PlioMIP2). As global annual average, modelled surface air temperatures increase...
The mid-Piacenzian climate represents the most geologically recent interval of long-term average warmth relative to last million years, and shares similarities with projected for end 21(st) century. As such, it a natural experiment from which we can gain insight into potential change impacts, enabling more informed policy decisions mitigation adaptation. Here, present first systematic comparison Pliocene sea surface temperature (SST) between an ensemble eight model simulations produced as...
Abstract The rate of increase global‐mean surface air temperature (SAT g ) has apparently slowed during the last decade. We investigated extent to which state‐of‐the‐art general circulation models (GCMs) can capture this hiatus period by using multimodel ensembles historical climate simulations. While SAT linear trend for decade is not captured their ensemble means regardless differences in model generation and external forcing, it barely represented an 11‐member a GCM, suggesting internal...
Abstract Atmospheric rivers (ARs), conduits of intense water vapor transport in the midlatitudes, are critically important for resources and heavy rainfall events over west coast North America, Europe, Africa. ARs also frequently observed northwestern Pacific (NWP) during boreal summer but have not been studied comprehensively. Here climatology, seasonal variation, interannual variability, predictability NWP (NWPARs) examined by using a large ensemble, high-resolution atmospheric general...
Sri Lanka has a tropical monsoon climate. The first intermonsoon (FIM) season is one of four rainfall seasons. Previous investigations have explored the concurrent ramifications El Niño Southern Oscillation (ENSO); however, its impact on seasonal patterns in country post-El years remains unexplored. This study aims to investigate anomalous FIM during years. Weather station data from Department Meteorology for 114 stations 1975–2019, Japanese 55-year reanalysis data, and COBE sea surface...
In this study, we constructed a perturbed physics ensemble (PPE) for the MIROC5 coupled atmosphere–ocean general circulation model (CGCM) to investigate parametric uncertainty of climate sensitivity (CS). Previous studies PPEs have mainly used atmosphere-slab ocean models. A few PPE using CGCM applied flux corrections, because perturbations in parameters can lead large radiation imbalances at top atmosphere and drifts. We developed method prevent drifts experiments without corrections....
Abstract. Based on simulations with 15 climate models in the Pliocene Model Intercomparison Project (PlioMIP), regional of East Asia (focusing China) during mid-Pliocene is investigated this study. Compared to pre-industrial, multi-model ensemble mean (MMM) all shows Asian summer winds (EASWs) largely strengthen monsoon China, and winter (EAWWs) south China but slightly weaken north mid-Pliocene. The MMM also illustrates a warmer wetter China. simulated weakened EAWWs intensified EASWs agree...
Abstract. The Pliocene Model Intercomparison Project (PlioMIP) is the first coordinated climate model comparison for a warmer palaeoclimate with atmospheric CO2 significantly higher than pre-industrial concentrations. simulations of mid-Pliocene warm period show global warming between 1.8 and 3.6 °C above surface air temperatures, significant polar amplification. Here we perform energy balance calculations on all eight coupled ocean–atmosphere within PlioMIP Experiment 2 to evaluate causes...
Eddy transport of atmospheric water vapor from the tropics is important for rainfall and related natural disasters in middle latitudes. Atmospheric rivers (ARs), intense moisture plumes that are typically associated with extratropical cyclones, often produce heavy precipitation upon encountering topography on west coasts mid-latitude North America Europe. ARs also occur over northwestern Pacific sometimes cause floods landslides East Asia, but climatological relationship between this region...
Abstract. Palaeoclimate simulations improve our understanding of the climate, inform us about performance climate models in a different scenario, and help to identify robust features system. Here, we analyse Arctic warming an ensemble 16 mid-Pliocene Warm Period (mPWP), derived from Pliocene Model Intercomparison Project Phase 2 (PlioMIP2). The PlioMIP2 simulates (60–90∘ N) annual mean surface air temperature (SAT) increases 3.7 11.6 ∘C compared pre-industrial period, with multi-model (MMM)...
Abstract Portions of East Asia often experienced extremely heavy rainfall events over the last decade. Intense atmospheric rivers (ARs), eddy transports moisture middle latitudes, contributed significantly to these events. Although previous studies pointed out that landfalling ARs will become more frequent under global warming, extent which produce extreme in a warmer climate remains unclear. Here we evaluate changes frequency and intensity AR‐related warming using set high‐resolution...
Physical processes responsible for tropospheric adjustment to increasing carbon dioxide concentration are investigated using abrupt CO2 quadrupling experiments of a general circulation model (GCM) called the interdisciplinary research on climate version 5 with several configurations including coupled atmosphere–ocean GCM, atmospheric and aqua-planet model. A similar experiment was performed in weather forecast mode explore timescales adjustment. We found that shortwave component cloud...
Abstract. In the Pliocene Model Intercomparison Project (PlioMIP), eight state-of-the-art coupled climate models have simulated mid-Pliocene warm period (mPWP, 3.264 to 3.025 Ma). Here, we compare Atlantic Meridional Overturning Circulation (AMOC), northward ocean heat transport and stratification with these models. None of participating in PlioMIP simulates a strong AMOC as suggested by earlier proxy studies. Rather, there is no consistent increase maximum among The only change shoaling...
Abstract. During an interval of the Late Pliocene, referred to here as mid-Pliocene Warm Period (mPWP; 3.264 3.025 million years ago), global mean temperature was similar that predicted for end this century, and atmospheric carbon dioxide concentrations were higher than pre-industrial levels. Sea level also today, implying a significant reduction in extent ice sheets. Thus, mPWP provides natural laboratory which investigate long-term response Earth's sheets sea warmer-than-present-day world....
Recent research indicates that the cooling trend in tropical Pacific Ocean over past 15 years underlies contemporaneous hiatus global mean temperature increase. During hiatus, displays a La Niña-like pattern while sea surface (SST) Indian has continued to This SST differs from well-known Niña-induced basin-wide across on interannual timescale. Here, based model experiments, we show during explains pronounced regional anomalies of rainfall Asian monsoon region and thermodynamic effects due...
Land–sea surface air temperature (SAT) contrast, an index of tropospheric thermodynamic structure and dynamical circulation, has shown a significant increase in recent decades over East Asia during the boreal summer. In Part I this two-part paper, observational data results transient warming experiments conducted using coupled atmosphere–ocean general circulation models (GCMs) are analyzed to examine changes land–sea thermal contrast associated atmospheric from past future. The interannual...
Abstract The eastern tropical Pacific features strong climatic asymmetry across the equator, with intertropical convergence zone (ITCZ) displaced north of equator most time. In February–April (FMA), seasonal warming in Southern Hemisphere and cooling Northern weaken asymmetry, a double ITCZ appears zonal rainband on either side equator. Results from an analysis precipitation variability reveal that relative strength between northern southern varies one year to another this meridional seesaw...
Abstract Anomalously high summertime temperatures have occurred with increasing frequency since the late 20th century. It is not clear why hot summers are becoming more frequent despite recent slowdown in rise global surface air temperature. To examine factors affecting historical variation of over Northern Hemisphere (NH), we conducted three sets ensemble simulations an atmospheric general circulation model. The model accurately reproduced interannual and long‐term increase occurrence...
A severe heat wave occurred in the southwestern United States (US) during June and July 2013. To investigate effects of natural variability anthropogenic climate change on this event, we generated large ensemble simulations possible weather using MIROC5A model forced by "historical external forcing agents, sea surface temperature (SST) observations ice (SIC) observations" both with without human influence. It was suggested that warming an atmospheric circulation regime related to SST SIC...
Abstract. Accumulations of global proxy data are essential steps for improving reliability climate model simulations the Pliocene warming climate. In Model Intercomparison Project phase 2 (PlioMIP2), a part project Paleoclimate Modelling 4, boundary forcing have been updated from PlioMIP 1 due to recent advances in understanding oceanic, terrestrial and cryospheric aspects palaeoenvironment. this study, sensitivities newly archived conditions evaluated by set using an atmosphere–ocean...