A5100670562- Climate variability and models
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Hydraulic and Pneumatic Systems
- Global Energy and Sustainability Research
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Hydrology and Watershed Management Studies
- Fluid Dynamics and Mixing
- Environmental Changes in China
- Tribology and Lubrication Engineering
- Climate change impacts on agriculture
- Crystallography and molecular interactions
- Cavitation Phenomena in Pumps
- Stellar, planetary, and galactic studies
- Oil and Gas Production Techniques
- Water Systems and Optimization
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Science, Research, and Medicine
Georgia Institute of Technology
2018-2024
Xuzhou University of Technology
2024
NSF National Center for Atmospheric Research
2023
Xinjiang University
2023
Princeton University
2016-2019
NOAA Geophysical Fluid Dynamics Laboratory
2016-2018
University of Miami
2013-2016
Nanjing University
2011
Responses of tropical cyclones (TCs) to CO2 doubling are explored using coupled global climate models (GCMs) with increasingly refined atmospheric/land horizontal grids (~ 200 km, ~ 50 km and 25 km). The three exhibit similar changes in background fields thought regulate TC activity, such as relative sea surface temperature (SST), potential intensity, wind shear. However, frequency decreases substantially the model, while model shows no significant change. also has a substantial...
There is a lack of consensus on the physical mechanisms that drive anthropogenic weakening tropical circulation. This study investigates relative roles direct CO2 forcing, mean SST warming, and pattern change circulation using an ensemble AMIP aquaplanet simulations. In terms circulation, warming dominates over forcing through its control hydrological cycle tropospheric stratification. spatial weakening, however, three agents are all important contributors, especially ocean. The increasing...
The impact of long-term sea surface temperature (SST) change on the atmospheric circulation is studied by comparing general model (AGCM) simulations forced with a spatially uniform SST increase and structured increase. calculated from response an ensemble coupled ocean-atmosphere models to increased CO2. Most pattern confined equatorial Indo-Pacific. However, under two types forcing similar over rest tropics almost identical in extratropics, indicating that future has overall little and,...
There is large uncertainty in the model simulation of regional climate change from anthropogenic forcing. Recent studies have tried to link such intermodel differences pattern sea surface temperature (SST) change. On other hand, coupled models also contain systematic biases their climatology, largely due drift SSTs. To extent that projected changes depend on mean state, present-day climatology contribute spread projections. By comparing atmospheric general circulation (AGCM) simulations...
Abstract There is large uncertainty in the simulation of transient climate sensitivity. This study aims to understand how such related base by comparing two simulations with same model but which CO2 increased from either a preindustrial (1860) or present-day (1990) control simulation. allows different ocean circulations that are representative those current models be imposed upon single model. As result, projects sensitivities comparable multimodel spread. The greater warming 1990-start run...
Abstract The driving of tropical precipitation by the variability underlying sea surface temperature (SST) plays a critical role in atmospheric general circulation. To assess sensitivity to SST variability, it is necessary observe and understand relationship between SST. However, precipitation–SST relationships from any coupled atmosphere–ocean system can be difficult interpret given challenge disentangling SST-forced response intrinsic variability. This study demonstrates that two...
Abstract Atmospheric general circulation models (AGCMs) are often considered inadequate for studying natural climate variability because of their lack coupling with an underlying ocean. This two-way air–sea results in inconsistency surface energetics. study aims to determine whether the also undermines AGCM’s ability simulate anthropogenic change. A comparison between coupled and atmospheric GCM simulations shows that change can be well reproduced by AGCM errors due primarily limited...
The surface Walker and tropical tropospheric circulations have been inferred to slow down from historical observations model projections, yet analysis of large-scale wind predictions is lacking. Satellite measurements speed indicate strengthening trends averaged over the global oceans that are supported by precipitation evaporation changes. Here we use corrected anemometer-based show has not decreased in oceans, despite its reduction region circulation. Historical simulations future...
The intrinsic atmospheric and ocean-induced tropical precipitation variability is studied using millennial control simulations with various degrees of ocean coupling. A comparison between the coupled simulation atmosphere-only climatological sea surface temperatures (SSTs) shows that a substantial amount generated without oceanic influence. This features red noise spectrum from daily to monthly time scales white beyond scale. impact inappreciable for submonthly but important at interannual...
Abstract Most climate models project an enhanced mean sea surface temperature (SST) warming in the equatorial Pacific and Atlantic, a zonal SST dipole Indian Ocean. The remote influences of these change patterns remain uncertain. To examine extent to which changes tropical Atlantic Oceans modulate Ocean, we compare nudging experiments with prescribed structured uniform tropics outside Pacific. We find that Oceans, respectively, drive canonical La Niña‐like elongated cooling through Bjerknes...
The binary systems consisting of a Be star and white dwarf (BeWDs) are very interesting.They can originate from the binaries composed subdwarf O or B (BesdOBs), they merge into red giants via luminous nova evolve double WD potentially detected by $LISA$ mission. Using method population synthesis, we investigate formation destiny BeWDs,and discuss effects metallicity ($Z$) common envelope evolution parameters. We find that BesdOBs significant progenitors BeWDs. About 30\% ($Z=0.0001$)-50\%...
Abstract Sea surface temperature anomalies (SSTa) in the Western North Pacific (WNP) have been linked to development of El Niño Southern Oscillation (ENSO) events a full year advance. However, contribution WNP precursor temporal evolution and spatial complexity ENSO remains unclear. Using preindustrial experiment Community Earth System Model as control climate, partially coupled is conducted which SSTa are restored model climatology. By comparing perturbed control, we able clearly...
Abstract The past few years have seen a growing investment in the development of global eddy‐resolving ocean models, but impact incorporating such high resolution on precipitation responses to CO 2 forcing has yet be investigated. This study analyzes changes from suite Geophysical Fluid Dynamics Laboratory models (0.1°), eddy‐permitting (0.25°), and eddy‐parameterizing (1°) models. incorporation eddy does not challenge large‐scale structure results substantial regional differences,...
Abstract One of the most puzzling observed features recent climate has been a multidecadal surface cooling trend over subpolar Southern Ocean (SO). In this study we use large ensembles simulations with multiple models to role SO meridional overturning circulation (MOC) in these sea temperature (SST) trends. We find that competing processes play prominent roles, consistent mechanisms proposed literature for cooling. Early (twentieth century and early twenty-first century) internal variability...
Abstract The Walker circulation (WC) responds to CO 2 forcing at both short and long timescales. In climate models, the fast response accounts for a substantial portion of total responses, but its mechanisms, particularly those pertaining air‐sea interactions, remain unclear. We find contrasting WC responses in first years abrupt forcing, determined by models' coupling strength equatorial Pacific. models with strong coupling, wind anomalies induced instantaneous land‐sea thermal contrast...
Abstract A valve seat structure with some bionic drainage of the regulating was designed which is inspired by cuttlefish. The development and collapse cavitation flow in this investigated numerical simulation, experimental measurement theoretical analysis. influence on internal distribution three-dimensional morphology also fully discussed. results show that hole destroyed law ring channel, accelerated mainly concentrates inner surface seat. Furthermore, causes vortex to break into smaller...
Abstract Regional hydrological sensitivity (i.e., precipitation change per degree local surface warming) contributes substantially to the uncertainty in future projections over tropical oceans. Here, we investigate of relative (P*, divided by basin average precipitation) sea temperature (SST) dissecting it into three components, namely P* SST (SST rel , minus mean SST) changes, convergence and gradient changes. We show that relationships between P*, convergence, gradients are largely...
Cavitation may quickly damage the surfaces of valve core and seat, causing noise, vibration problems. Different cavitation stages will affect regulating valve's flow characteristics to different degrees. Flow rate is one basic parameters in a hydraulic system, which innovatively used evaluate flow. By analyzing deviation ratio K between actual theoretical rate, flows are divided into four stages, dynamic behavior discussed using high-speed camera image processing technology. When zero, it...