A5077198208- Oceanographic and Atmospheric Processes
- Climate variability and models
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Marine and coastal ecosystems
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Geological formations and processes
- Arctic and Antarctic ice dynamics
- Geological and Geophysical Studies
- Wave and Wind Energy Systems
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- Environmental Toxicology and Ecotoxicology
- Coastal and Marine Dynamics
- Fish Biology and Ecology Studies
- Crustacean biology and ecology
- Methane Hydrates and Related Phenomena
- Marine Biology and Environmental Chemistry
- Cryospheric studies and observations
Texas A&M University
2017-2025
Texas A&M University System
2021
Ocean University of China
2019
Qingdao National Laboratory for Marine Science and Technology
2019
University of California, Los Angeles
2009-2012
Planetary Science Institute
2009-2011
Indian Institute of Science Bangalore
2005-2007
National Institute of Oceanography
1996
Eddy detection and tracking algorithms are applied to both satellite altimetry a high-resolution (dx = 5 km) climatological model solution of the U.S. West Coast study properties surface undercurrent eddies in California Current System.Eddy show remarkable similarity space time, even somewhat polarity.Summer fall most active seasons for eddy generation, while there is less seasonal variation at surface.Most have radii range 25-100 km, sea level anomaly amplitudes 1-4 cm, vorticity normalized...
Abstract Upwelling along ocean eastern boundaries is expected to intensify due coastal wind strengthening driven by increasing land-sea contrast according the Bakun hypothesis. Here, latest high-resolution climate simulations that exhibit drastic improvements of upwelling processes reveal far more complex future changes. The Southern Hemisphere systems show a in winds with rapid warming, whereas Northern decrease comparable warming trend. mechanism cannot explain these Heat budget analysis...
Abstract In this paper we summarize improvements in climate model simulation of eastern boundary upwelling systems (EBUS) when changing the forcing dataset from Coordinated Ocean-Ice Reference Experiments (CORE; ∼2° winds) to higher-resolution Japanese 55-year Atmospheric Reanalysis for driving ocean–sea ice models (JRA55-do, ∼0.5°) and also due refining ocean grid spacing 1° 0.1°. The focus is on sea surface temperature (SST), a key variable studies, which typically too warm representation...
The equatorial Indian Ocean (EIO) exhibited anomalous conditions characteristic of an dipole (IOD) during 2006. eastern EIO had cold sea surface temperature anomalies (SSTA), lower level, shallow thermocline and higher chlorophyll than normal. in the east, restricted to south equator, were highest off Sumatra. western pole IOD was marked by warm SSTA deeper with maxima on either side equator. An ocean general circulation model forced QuikSCAT winds reproduces 2006 remarkably well. switch...
An Ocean General Circulation Model of the Indian with high horizontal (0.25° × 0.25°) and vertical (40 levels) resolutions is used to study dynamics thermodynamics Arabian Sea mini warm pool (ASMWP), warmest region in northern during January–April. The model simulates seasonal cycle temperature, salinity currents as well winter time temperature inversions southeastern (SEAS) quite realistically climatological forcing. experiment which maintained uniform 35 psu over entire domain reproduces...
Abstract Observations, primarily from satellites, have shown a statistical relationship between the surface wind stress and underlying sea temperature (SST) on intermediate space time scales, in many regions inclusive of eastern boundary upwelling current systems. In this paper, empirical SST–wind is utilized to provide simple representation mesoscale air–sea coupling for an oceanic model forced by winds, namely, Regional Oceanic Modeling System (ROMS). This formulation applied idealized...
Sea level anomalies (SLA) from satellite altimetry (1993–2003) reveal the westward movement of mesoscale eddies in Gulf Aden. Inside gulf move at a speed ∼6.0–8.5 cm s −1 , comparable to first‐mode baroclinic Rossby wave 7.2 . We show that eddies, which enter Arabian Sea, owe their existence more than one mechanism. Local Ekman pumping western is important during summer monsoon (June–September). In May and latter half (late July September) fall intermonsoon (October), dominant mechanism...
The generation mechanisms and properties of the mesoscale eddies in northeastern tropical Pacific (NETP) are studied using a series numerical solutions satellite observations. spatial temporal resolution mountain wind jets over Gulfs Tehuantepec Papagayo essential for an accurate modeling regional variability. Three previously proposed eddy local transient forcing, combined low‐frequency boundary remote equatorial Kelvin wave forcing. In our model, wind‐forcing was represented by fields with...
Among various forms of atmospheric response to ocean mesoscale eddies, the rainfall is most difficult quantify and subject considerable uncertainty. Here robustness examined by comparing three different satellite-derived datasets: Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA), NOAA Climate Prediction Center (CPC) morphing technique (CMORPH) global precipitation, newly available Integrated Retrievals for Global Measurement (IMERG) that based on latest...
Numerical simulations using a high resolution (0.25° × 0.25°, 40 levels) OGCM of the Indian Ocean are used to study formation mechanisms temperature inversions (TI) in southeastern Arabian Sea (SEAS) during winter. To west and south India, haline stratification is necessary pre‐requisite for TI formation. Off southern tip low‐salinity water advected from Bay Bengal cooled by strong winds leads In part SEAS, advection this cooler over warm salty SEAS occur at deeper depth (∼80 m) due...
Abstract Mesoscale eddies have been extensively studied based on the sea surface height anomaly (SSHA). However, it is temperature (SSTA) that vital to mesoscale eddy–atmosphere interactions. In this study, we analyze amplitude relationship between SSHA and SSTA (referred as H-T relationship) in Kuroshio–Oyashio extension (KOE) region using both observational reanalysis data. It found spatial distribution of variance not coincident with variance. The former peaks Kuroshio around 35°N whereas...
Abstract A previously uninvestigated necking‐down region in the Gulf of Mexico, associated with Loop Current eddy (LCE) separations is defined by 8–16 days variance below system (LCS) around 88.5°W, using an Ocean‐Atmosphere Coupled Regional‐Community Earth System Model (R‐CESM) 9‐year nature run, which reveals mechanisms (LC) deep dynamics. Scaled wavelet analysis flow fields five regions at 27.5 kg/m 3 potential density layer under LCS shows that reproduced R‐CESM model dynamics, aligning...
Abstract Based on eddy‐rich (0.1° horizontal resolution for ocean) Community Earth System Model simulations, we compute the Ekman pumping induced vertical eddy heat flux using two formulations: classical and Stern‐Ekman pumping. The mechanisms yield similar patterns in eddy‐induced flux, showing strong upward ocean frontal regions such as western boundary current regions. Using Gulf Stream Extension region an example, estimate (1) is 23% 12% of total at 50 m depth during summer winter,...
Abstract The development of high-resolution, fully coupled, regional Earth system model systems is important for improving our understanding climate variability, future projections, and extreme events at scales. Here we introduce present an overview the newly developed Regional Community System Model (R-CESM). Different from other existing models, R-CESM based on version 2 (CESM2) framework. We have incorporated Weather Research Forecasting (WRF) Ocean Modeling (ROMS) into CESM2 as...