A5089786563- Climate variability and models
- Meteorological Phenomena and Simulations
- Oceanographic and Atmospheric Processes
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Ocean Waves and Remote Sensing
- Plant Water Relations and Carbon Dynamics
- Atmospheric Ozone and Climate
- Hydrology and Drought Analysis
- Hydrology and Watershed Management Studies
- Geological and Geophysical Studies
- Geophysics and Gravity Measurements
- Climate change impacts on agriculture
- Global Energy and Sustainability Research
- Ocean Acidification Effects and Responses
- demographic modeling and climate adaptation
- Hydrological Forecasting Using AI
- Fire effects on ecosystems
- Plant Ecology and Soil Science
NOAA Geophysical Fluid Dynamics Laboratory
2016-2025
National Oceanic and Atmospheric Administration
2016-2025
Princeton University
2012-2024
University of Miami
2024
GenomeDesigns Lab (United States)
2023-2024
US Climate Variability and Predictability Program
2020
Massachusetts Institute of Technology
2019
NSF National Center for Atmospheric Research
2018
Barcelona Supercomputing Center
2018
Universitat Politècnica de Catalunya
2018
A coordinated set of global coupled climate model [atmosphere–ocean general circulation (AOGCM)] experiments for twentieth- and twenty-first-century climate, as well several change commitment other experiments, was run by 16 modeling groups from 11 countries with 23 models assessment in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4). Since completed, output another has been added to dataset, so participation is now 17 12 24 models. This effort, subsequent...
Abstract The formulation and simulation characteristics of two new global coupled climate models developed at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL) are described. were designed to simulate atmospheric oceanic variability from the diurnal time scale through multicentury change, given our computational constraints. In particular, an important goal was use same model for both experimental seasonal interannual forecasting study this has been achieved. Two versions described, called...
Abstract The Geophysical Fluid Dynamics Laboratory (GFDL) has developed a coupled general circulation model (CM3) for the atmosphere, oceans, land, and sea ice. goal of CM3 is to address emerging issues in climate change, including aerosol–cloud interactions, chemistry–climate coupling between troposphere stratosphere. also designed serve as physical system component earth models decadal prediction near-term future—for example, through improved simulations tropical land precipitation...
Prominent multidecadal fluctuations of India summer rainfall, Sahel and Atlantic Hurricane activity have been observed during the 20th century. Understanding their mechanism(s) will enormous social economic implications. We first use statistical analyses to show that these climate phenomena are coherently linked. Next, we GFDL CM2.1 model variability in ocean can cause variations rainfall (as inferred from vertical wind shear changes). These results suggest interpret recent change cannot...
A fully coupled ocean-atmosphere model is shown to have irregular oscillations of the thermohaline circulation in North Atlantic Ocean with a time scale approximately 50 years. The oscillation appears be driven by density anomalies sinking region (approximately 52°N 72°N) combined much smaller opposite sign broad, rising region. spatial pattern see surface temperature associated this bears an encouraging resemblance observed interdecadal variability Atlantic. sea induce air over northern...
Abstract In this study, a mechanism is demonstrated whereby large reduction in the Atlantic thermohaline circulation (THC) can induce global-scale changes Tropics that are consistent with paleoevidence of global synchronization millennial-scale abrupt climate change. Using GFDL’s newly developed coupled ocean–atmosphere model (CM2.0), response to sustained addition freshwater model’s North simulated. This forcing substantially weakens THC, resulting southward shift intertropical convergence...
We compared the temporal variability of heat content world ocean, global atmosphere, and components Earth's cryosphere during latter half 20th century. Each component has increased its (the atmosphere ocean) or exhibited melting cryosphere). The estimated increase observed ocean (over depth range from 0 to 3000 meters) between 1950s 1990s is at least one order magnitude larger than in any other component. Simulation results using an atmosphere-ocean general circulation model that includes...
Abstract The authors present results for simulated climate and change from a newly developed high-resolution global model [Geophysical Fluid Dynamics Laboratory Climate Model version 2.5 (GFDL CM2.5)]. GFDL CM2.5 has an atmospheric resolution of approximately 50 km in the horizontal, with 32 vertical levels. horizontal ocean ranges 28 tropics to 8 at high latitudes, This allows explicit simulation some mesoscale eddies ocean, particularly lower latitudes. Analyses are presented based on...
Abstract The fast and slow components of global warming in a comprehensive climate model are isolated by examining the response to an instantaneous return preindustrial forcing. is characterized initial exponential decay with e-folding time smaller than 5 yr, leaving behind remnant that evolves more slowly. component estimated be small at present, as measured mean near-surface air temperature, and, examined, grows 0.4°C 2100 A1B scenario from Special Report on Emissions Scenarios (SRES),...
An atmospheric general circulation model with prescribed sea surface temperature and cloudiness was integrated for 50 years in order to study atmosphere-land interactions. The temporal variability of soil moisture precipitation have been studied an effort understand the interactions these variables other components climate system. Temporal analysis has shown that spectra monthly mean over land are close white at all latitudes, total variance decreasing poleward. In contrasts, red, become...
The Sahel, the transition zone between Saharan desert and rainforests of Central Africa Guinean Coast, experienced a severe drying trend from 1950s to 1980s, which there has been partial recovery. Continuation either or more recent ameliorating would have far-ranging implications for economy ecology region. Coupled atmosphere/ocean climate models being used simulate future had difficulty simulating Sahel rainfall variations comparable those observed, thus calling into question their ability...
The response of the Southern Hemisphere (SH), extratropical, atmospheric general circulation to transient, anthropogenic, greenhouse warming is investigated in a coupled climate model. extratropical consists SH summer half-year poleward shift westerly jet and year-round positive wind anomaly stratosphere tropical upper troposphere. Along with jet, there several related fields, including belt eddy momentum-flux convergence mean meridional overturning atmosphere ocean. tropospheric projects...
Abstract The Intergovernmental Panel on Climate Change (IPCC) fifth assessment of projected global and regional ocean temperature change is based climate models that have coarse (∼100 km) atmosphere resolutions. In the Northwest Atlantic, ensemble has a warm bias in sea surface due to misrepresentation Gulf Stream position; thus, existing projections are unrealistic circulation. Here we compare simulations an atmospheric CO 2 doubling response from four varying resolution. We find highest...
Abstract The authors characterize impacts on heat in the ocean climate system from transient mesoscale eddies. Their tool is a suite of centennial-scale 1990 radiatively forced numerical simulations three GFDL coupled models comprising Climate Model, version 2.0–Ocean (CM2-O), model suite. CM2-O differ their resolution: CM2.6 uses 0.1° grid, CM2.5 an intermediate grid with 0.25° spacing, and CM2-1deg nominal 1.0° grid. Analysis budget reveals that eddies act to transport upward manner...
Abstract Tropical cyclones (TCs) are a hazard to life and property prominent element of the global climate system; therefore, understanding predicting TC location, intensity, frequency is both societal scientific significance. Methodologies exist predict basinwide, seasonally aggregated activity months, seasons, even years in advance. It shown that newly developed high-resolution model can produce skillful forecasts seasonal on spatial scales finer than from months seasons advance season....
Decadal predictions have a high profile in the climate science community and beyond, yet very little is known about their skill. Nor there any agreed protocol for estimating This paper proposes sound coordinated framework verification of decadal hindcast experiments. The illustrated hindcasts tailored to meet requirements specifications CMIP5 (Coupled Model Intercomparison Project phase 5). chosen metrics address key questions information content initialized hindcasts. These are: (1) Do...
[1] In this paper, we found that the Atlantic Multidecadal Oscillation (AMO) can contribute to Pacific Decadal (PDO), especially component of PDO is linearly independent El Niño and Southern (ENSO), i.e. North (NPMO), associated Pacific/North America (PNA) pattern. Using a hybrid version GFDL CM2.1 climate model, show AMO provides source multidecadal variability Pacific, needs be considered along with other forcings for change. The lagged response forcing through atmospheric teleconnections...
Abstract Identifying the prime drivers of twentieth-century multidecadal variability in Atlantic Ocean is crucial for predicting how will evolve coming decades and resulting broad impacts on weather precipitation patterns around globe. Recently, Booth et al. showed that Hadley Centre Global Environmental Model, version 2, Earth system configuration (HadGEM2-ES) closely reproduces observed variations area-averaged North sea surface temperature twentieth century. The simulated HadGEM2-ES are...