Oza, Harsh; Padhya, Virendra; Ganguly, Akash; Pandey, Amit; Chakra, Swagatika; Deshpande, R D: Monthly amount-weighted stable isotope composition of precipitation from 41 IWIN stations across India, 2005-2016 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995469 (dataset in review)
Abstract:
This dataset provides monthly amount-weighted precipitation isotope observations from 41 stations across India, collected under the aegis of the National Programme on Isotope Fingerprinting of Waters of India (IWIN), a multi-institutional precipitation isotope monitoring network. It contains 1,034 station-month records from station-specific observation periods falling between June 2005 and September 2016. Each record includes station identifier, station name, WGS84 latitude and longitude, elevation, Köppen-Geiger climate class, monthly rainfall amount, δ18O, δ2H, and d-excess. Rainwater was collected using the IWIN rainwater sampling protocol designed to minimise evaporation. The sampler used a funnel connected to an airtight carboy, with a floating ball to reduce evaporation when rainfall was absent, a wire mesh to exclude coarse debris, a long air-outlet tube to limit air exchange, and a cloth cover to protect collected water from direct sunlight. Two sampling protocols were employed across the network: fortnightly accumulated samples (29 stations), collected on the 1st and 16th of each month, and daily accumulated samples (12 stations), collected each morning following a rainfall event the previous day. Collected water was mixed, measured, transferred to plastic bottles filled nearly to the brim, sealed with inner stubs and pilferage-proof caps, and preserved without chemical additives. Oxygen and hydrogen isotope ratios were measured at the Physical Research Laboratory, Ahmedabad, by continuous-flow IRMS using a Thermo Scientific Delta V Plus with GasBench II. Analytical precision was ±0.1‰ for δ18O and ±1.0‰ for δ2H. d-excess is calculated as δ2H - 8 × δ18O.
Keyword(s):
Funding:
Government of India (GOI), grant/award no. IR/S4/ESF-05/2004: National Programme on Isotope Fingerprinting of Waters of India
Coverage:
Median Latitude: 22.751986 * Median Longitude: 78.496235 * South-bound Latitude: 8.500000 * West-bound Longitude: 69.670000 * North-bound Latitude: 34.080000 * East-bound Longitude: 94.910000
Date/Time Start: 2005-06-01T00:00:00 * Date/Time End: 2016-09-01T00:00:00
Minimum ELEVATION: 3.0 m a.s.l. * Maximum ELEVATION: 1711.0 m a.s.l.
Event(s):
IWIN_1 (IWIN station 1 Ahmedabad) * Latitude: 23.020000 * Longitude: 72.570000 * Date/Time Start: 2005-06-01T00:00:00 * Date/Time End: 2016-09-30T00:00:00 * Elevation: 51.0 m * Location: Ahmedabad, India * Campaign: IWIN (National Programme for Isotope Fingerprinting of Waters of India) * Method/Device: Rain water collector (RAIN) * Comment: Ahmedabad; BSh - Arid, steppe, hot
IWIN_2 (IWIN station 2 Akola) * Latitude: 20.710000 * Longitude: 77.010000 * Date/Time Start: 2009-11-01T00:00:00 * Date/Time End: 2010-11-30T00:00:00 * Elevation: 294.0 m * Location: Akola, India * Campaign: IWIN (National Programme for Isotope Fingerprinting of Waters of India) * Method/Device: Rain water collector (RAIN) * Comment: Akola; BSh - Arid, steppe, hot
IWIN_3 (IWIN station 3 Anand) * Latitude: 22.560000 * Longitude: 72.960000 * Date/Time Start: 2008-09-01T00:00:00 * Date/Time End: 2011-09-30T00:00:00 * Elevation: 43.0 m * Location: Anand, India * Campaign: IWIN (National Programme for Isotope Fingerprinting of Waters of India) * Method/Device: Rain water collector (RAIN) * Comment: Anand; Aw - Tropical, savannah
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Oza, Harsh | |||
| 2 | DATE/TIME | Date/Time | Oza, Harsh | Geocode | ||
| 3 | LATITUDE | Latitude | Oza, Harsh | Geocode | ||
| 4 | LONGITUDE | Longitude | Oza, Harsh | Geocode | ||
| 5 | ELEVATION | Elevation | m a.s.l. | Oza, Harsh | Geocode | |
| 6 | Station ID | Stat ID | Oza, Harsh | |||
| 7 | Station label | Station | Oza, Harsh | |||
| 8 | Köppen-Geiger climate classification | Köppen-Geiger | Oza, Harsh | |||
| 9 | Precipitation | Precip | mm | Oza, Harsh | ||
| 10 | δ18O, precipitation | δ18O precip | ‰ SMOW | Oza, Harsh | ThermoFisher Delta V Plus IRMS with a Gasbench II interface | |
| 11 | δ Deuterium, precipitation | δD precip | ‰ SMOW | Oza, Harsh | ThermoFisher Delta V Plus IRMS with a Gasbench II interface | |
| 12 | Deuterium excess | d xs | ‰ | Oza, Harsh | ThermoFisher Delta V Plus IRMS with a Gasbench II interface |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
7238 data points
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