Decadal Variations in Oceanic Properties of the Arabian Sea Water Column since Geosecs
Bibliographic Data
| ID | 9242572 |
|---|---|
| Authors | Ravi Bhushan (0000-0003-1347-5446), Koushik Dutta (0000-0002-5976-7965), Rajesh Agnihotri (0000-0003-2069-0734), R Rengarajan, Satinder Pal Singh (0000-0001-7510-5980) |
| Year | 2014 |
| Volume | 56 |
| Issue | 1 |
| Pages | 313-325 |
| Publication date | 2014-01-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.2458/56.16963 |
| OpenAlex | W1977886123 |
| Language | EN |
| References cited | 28 |
This article reports temporal changes in the measured oceanic geochemical properties of the Arabian Sea and the equatorial Indian Ocean by reoccupying six stations investigated during the GEOSECS expedition in 1977 and 1978. Observed differences are interpreted in terms of plausible changes in the environment and climate that have occurred in response to natural or anthropogenic processes. The depth profiles of major parameters such as dissolved oxygen, ΣCO 2 , major nutrients (silicates, nitrates, and phosphates), and radiocarbon in dissolved inorganic carbon were measured during the cruises between 1994 and 1998 along with temperature and salinity. Most stations in the Arabian Sea show an increase in salinity by ∼0.2 to 0.3 salinity units in the top 400 m, whereas one station in the equatorial Indian Ocean showed a decrease in salinity by ∼0.1 units, indicating a likely change in the evaporation-precipitation (E-P) balance. The ΣCO 2 increased by an average of 8 μM within the top 1200 m of the Arabian Sea. The depth profiles of nitrates and dissolved oxygen for the central Arabian Sea stations show significant variations, while only marginal changes are seen for silicates and phosphates relative to the GEOSECS data. The decrease in Δ 14 C of surface waters is due to the steady decrease in atmospheric 14 C concentration since GEOSECS, and the Δ 14 C increase in subsurface waters is attributed to the downward vertical diffusion of bomb 14 C interpreted in terms of atmosphere to ocean transfer and lateral advection of water masses
Advection · Biogeochemical cycle · Dissolved organic carbon · Precipitation · Salinity · Seawater · Surface water · Water column · Chemistry · Environmental Science · Marine and coastal ecosystems · Marine and fisheries research · Oceanographic and Atmospheric Processes · Environmental Chemistry · Geology · Oceanography
Increase in the Asian Southwest Monsoon During the Past Four Centuries
Variability of subsurface denitrification and surface productivity in the coastal eastern Arabian Sea over the past seven centuries
Geosecs Indian Ocean and Mediterranean Radiocarbon
Atmospheric 14 C Variability Recorded in Tree Rings from Peninsular India
Bomb 14C in the Indian Ocean Measured by Accelerator Mass Spectrometry
Physical Research Laboratory (Chemistry) Radiocarbon Date List I
Discussion Reporting of 14 C Data
| Citation velocity | historical |
|---|---|
| Highly cited | No |