A5032863941- Groundwater and Isotope Geochemistry
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Tropical and Extratropical Cyclones Research
- Geology and Paleoclimatology Research
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Hydrology and Watershed Management Studies
- Spectroscopy and Laser Applications
- Coastal and Marine Dynamics
- Per- and polyfluoroalkyl substances research
- Flood Risk Assessment and Management
- Marine and environmental studies
Indian Institute of Science Bangalore
2015-2020
Utrecht University
2019
Abstract Isotopic ratios of rainwaters are believed to decrease with the amount rainfall. However, analyses isotopic composition rainwater and water vapor samples collected from Bangalore during monsoon period 2013 fail show any simple relationship local meteorological parameters whereas good correlation regional integrated convective activity. The is particularly high when averaging done over preceding 8 15 days, showing influence mixing or residence time scale atmospheric moisture. This...
Stable Hydrogen and Oxygen isotopic composition of water vapor, rainwater surface seawater show a distinct trend across the latitude over Southern Indian Ocean. Our observations on seawater, vapor transect covering tropical Ocean to regions showed strong latitudinal dependency; characterized by zonal process evaporation precipitation. The sampling points were spread diverse zones SST, wind speed rainfall regimes. observed physical parameters such as sea temperature, relative humidity oceanic...
Triple oxygen isotope systematics has evolved as a powerful tool in understanding various earth system processes. It proven reliable assessing paleoenvironmental conditions from natural archives (e.g., waters, ice cores, biota, sediments, etc.) owing to recent advances high-precision mass spectrometric analysis. Toward the standardization of triple analyses carbonates, we describe procedure Δ′17O analysis carbonates by two-step protocol: acid digestion evolve CO2 followed catalytic CO2–O2...
Abstract Variations in the isotope ratios ( 18 O/ 16 O and D/H) of meteoric water at continental stations serve as valuable tracers for hydrological cycle. In present study, we investigated role sea surface temperature, wind speed, relative humidity, rainout processes on stable isotopic composition 2010 monsoon rainwater Bangalore. The over ocean influences temperature humidity which turn influence vapor composition. Arabian Sea land mass (Western Ghats) during advection air parcel to...
Rationale The doubly substituted isotopologues (e.g., 18 O O, 17 O) in atmospheric 2 are potential tracers for ozone photochemistry and temperatures. Their low abundances isobaric interference the major analytical challenges. 253 Ultra high‐resolution stable isotope ratio mass spectrometer is suitable resolving interferences. Methods from air purified using gas chromatography on a packed column filled with molecular sieve 5 Å cooled to −78°C. δ Δ 35 36 values measured extracted at medium...
<p>Abundances of <sup>17</sup>O<sup>18</sup>O and <sup>18</sup>O<sup>18</sup>O (also called clumped isotopes denoted by Δ<sub>35</sub> Δ<sub>36</sub>) O<sub>2</sub>  in firn ice core air are novel tracers that can be useful to study past changes...