Browsing by Author "Karapurkar, S.G."
Now showing items 1-11 of 11
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Carbon and nitrogen isotopic composition of suspended particulate organic matter in Zuari Estuary, west coast of India
Bardhan, P.; Karapurkar, S.G.; Shenoy, D.M.; Kurian, S.; Sarkar, A.; Maya, M.V.; Naik, H.; Varik, S.; Naqvi, S.W.A. (Elsevier, 2015)The spatio-temporal variations of the δ13C and δ15N of suspended particulate organic matter (SPOM), along with ancillary chemical and hydrographic parameters, have been examined monthly for one year (October 2010 to September ... -
Chemical, isotopic and amino acid composition of Mukundpura CM2.0 (CM1) chondrite: Evidence of parent body aqueous alteration
Rudraswami, N.G.; Naik, A.K.; Tripathi, R.P.; Bhandari, N.; Karapurkar, S.G.; Prasad, M.S.; Babu, E.V.S.S.K.; VijayaSarathi, U.V.R. (Elsevier, 2019)The carbonaceous chondrites are intriguing and unique in the sense that they are the only rocks that provide pristine records of the early solar nebular processes. We report here results of a detailed mineralogical, chemical, ... -
Coupling between suboxic condition in sediments of the western Bay of Bengal and southwest monsoon intensification: A geochemical study
Pattan, J.N.; Mir, I.A.; Parthiban, G.; Karapurkar, S.G.; Matta, V.M.; Naidu, P.D.; Naqvi, S.W.A. (Elsevier, 2013)Reconstruction of paleo-redox conditions in a radiocarbon (14C) dated sediment core (SK-218/1), covering the past 45 ka (thousand calendar years), collected from the western Bay of Bengal (Lat: 14 degrees 02′N; Long: 82 ... -
Intra-annual variability of carbon and nitrogen stable isotopes in suspended organic matter in waters of the western continental shelf of India
Maya, M.V.; Karapurkar, S.G.; Naik, H.; Roy, R.; Shenoy, D.M.; Naqvi, S.W.A. (The European Geosciences Union, 2011)Intra-annual variations of delta sup(13)C and delta sup(15)N of watercolumn suspended particulate organic matter (SPOM) have been investigated to understand the biogeochemical cycling of C and N in the Western Continental ... -
Isotopic composition of nitrate and particulate organic matter in a pristine dam reservoir of western India: Implications for biogeochemical processes
Bardhan, P.; Naqvi, S.W.A.; Karapurkar, S.G.; Shenoy, D.M.; Kurian, S.; Naik, H. (European Geosciences Union, 2017)Isotopic composition of nitrate (δ<sup>15</sup>N and δ<sup>18</sup>O) and particulate organic matter (POM; δ<sup>15</sup>N and δ<sup>13</sup>C) were measured in the Tillari Reservoir, located at the ... -
Organic carbon dynamics in the continental shelf waters of the eastern Arabian Sea
Shetye, S.S.; Nandakumar, K.; Kurian, S.; Gauns, M.; Shenoy, D.M.; Naik, H.; Vidya, P.J.; Karapurkar, S.G. (Springer, 2022)The seasonal and spatial distribution of total organic carbon (TOC) is presented for the coastal waters of the eastern Arabian Sea, which experiences seasonal suboxia during the late southwest monsoon (SWM).This study ... -
Sedimentary pigments and nature of organic matter within the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (Indian margin)
Rasiq, K.T.; Kurian, S.; Karapurkar, S.G.; Naqvi, S.W.A. (Elsevier, 2016)Sedimentary pigments, carbon and nitrogen content and their stable isotopes were studied in three short cores collected from the oxygen minimum zone (OMZ) of the Eastern Arabian Sea (EAS). Nine pigments including chlorophyll ... -
Stable carbon and nitrogen isotopic composition of PM10 over Indo-Gangetic Plains (IGP), adjoining regions and Indo-Himalayan Range (IHR) during a winter 2014 campaign
Sen, A.; Karapurkar, S.G.; Saxena, M.; Shenoy, D.M.; Chaterjee, A.; Choudhuri, A.K.; Das, T.; Khan, A.H.; Kuniyal, J.C.; Pal, S.; Singh, D.P.; Sharma, S.K.; Kotnala, R.K.; Mandal, T.K. (Springer Berlin Heidelberg, 2018)For source identification, a field campaign involving simultaneous sampling of particulate matter (PM10) was conducted at eight sampling sites in the Indian mainland during winter 2014. The sampling sites include Delhi ... -
Study on Ambient Air Quality of Megacity Delhi, India During Odd-Even Strategy
Sharma, S.K.; Agarwal, P.; Mandal, T.K.; Karapurkar, S.G.; Shenoy, D.M.; Peshin, S.K.; Gupta, A.; Saxena, M.; Jain, S.; Sharma, A.; Saraswati (Springer India, 2017)State Government of Delhi had adopted odd-even scheme on vehicles plying in megacity Delhi to understand and improve the air quality of Delhi. To understand the effect of odd-even scheme on the concentration of pollutants, ... -
Total organic carbon and its role in oxygen utilization in the eastern Arabian Sea
Shetye, S.S.; Kurian, S.; Vidya, P.J.; Gauns, M.; Shenoy, D.M.; Aparna, S.G.; Nandakumar, K.; Karapurkar, S.G. (Elsevier Ltd, 2021)We report seasonal and temporal variation of total organic carbon (TOC) in the eastern Arabian Sea (AS). In comparison to the deep, TOC in the top 100 m showed spatial variation with higher concentrations towards northern ... -
Variation in the Indian summer monsoon intensity during the Bolling-Allerod and Holocene
Kessarkar, P.M.; Rao, V.P.; Naqvi, S.W.A.; Karapurkar, S.G. (American Geophysical Union, 2013)Variations in the Indian summer monsoon (ISM) intensity during the last 16.7 ka have been studied using organic carbon (C<sub>org</sub>), delta <sup>15</sup>N of sedimentary organic matter, CaCO<sub>3</sub>, sediment ...