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You searched for: Source 2012 v.121 no.3 Remove constraint Source: 2012 v.121 no.3 Subject Earth system science Remove constraint Subject: Earth system science
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1. Characteristic features of winter precipitation and its variability over northwest India

Author:
R K YADAV; K RUPA KUMAR; M RAJEEVAN
Source:
Journal of earth system science 2012 v.121 no.3 pp. 611-623
ISSN:
0253-4126
Subject:
temporal variation; statistics; rivers; water supply; winter; meteorology; Earth system science; hills; glaciers; melting; atmospheric precipitation; crops; India; Himalayan region
Abstract:
... Northwestern parts of India receive considerable amount of precipitation during the winter months of December–March. Although, it is only about 15% of the annual precipitation, the precipitation is very important for rabi crops and to maintain the glaciers extend in the Himalaya, which melt and supply water to the rivers during other seasons. The precipitation is mainly associated with the sequenc ...
DOI:
10.1007/s12040-012-0184-8

2. Chemical characterisation of meltwater draining from Gangotri Glacier, Garhwal Himalaya, India

Author:
VIRENDRA BAHADUR SINGH; AL RAMANATHAN; JOSE GEORGE POTTAKKAL; PARMANAND SHARMA; ANURAG LINDA; MOHD FAROOQ AZAM; C CHATTERJEE
Source:
Journal of earth system science 2012 v.121 no.3 pp. 625-636
ISSN:
0253-4126
Subject:
geochemistry; cations; watersheds; analytical chemistry; sulfates; rocks; weathering; anions; sodium; oxidation; protons; Earth system science; calcium; bicarbonates; potassium; statistical analysis; ionic strength; hydrochemistry; snowmelt; carbonates; nitric oxide; chlorides; glaciers; magnesium; carbonation; sulfides; nitrates; India; Himalayan region
Abstract:
... A detailed analytical study of major cations (Ca2 + , Mg2 + , Na + , K + ) and anions (SO[Formula: see text], HCO[Formula: see text], Cl − , NO[Formula: see text] of meltwater draining from Gangotri Glacier was carried out to understand major ion chemistry and to get an insight into geochemical weathering processes controlling hydrochemistry of the glacier. In the meltwater, the abundance order of ...
DOI:
10.1007/s12040-012-0177-7

3. Diagenesis of Holocene reef and associated beachrock of certain coral islands, Gulf of Mannar, India: Implication on climate and sea level

Author:
S KRISHNA KUMAR; N CHANDRASEKAR; P SERALATHAN; J DAJKUMAR SAHAYAM
Source:
Journal of earth system science 2012 v.121 no.3 pp. 733-745
ISSN:
0253-4126
Subject:
sediments; freshwater; ephemeral streams; energy; islands; sea level; Earth system science; sediment transport; rocks; terraces; corals; climatic factors; India
Abstract:
... The reef and associated beachrock from certain Gulf of Mannar islands (Rameswaram, Kurusadai, Shingle and Appa Island) were studied to assess the diagenetic evidences. Sixty samples were collected from marine terraces and reef platforms. The samples comprised of coral rubbles, shell fragments and lithic fractions. The presence of corals in the form of framework or isolated patches on the reef flat ...
DOI:
10.1007/s12040-012-0183-9

4. Effect of cloud occurrences on tropospheric ozone over, Alipore (22.52°N, 88.33°E), India

Author:
P K JANA; D SARKAR; D K SAHA; S K MIDYA
Source:
Journal of earth system science 2012 v.121 no.3 pp. 711-722
ISSN:
0253-4126
Subject:
sulfur dioxide; solar radiation; Earth system science; ozone; rain; nitrogen dioxide; troposphere; India
Abstract:
... The paper presents the nature of annual cycles of tropospheric ozone, cloud occurrences, NO2, rainfall, SO2, SPM, CO, non-methane hydrocarbon and surface solar radiation for the period October 2004 to June 2009 over Alipore (22.52°N, 88.33°E), India. Annual cycle of low-level cloud occurrences depicts that the low-level cloud over Alipore had been noticed to occur for many days and nights, parti ...
DOI:
10.1007/s12040-012-0196-4

5. Gravity anomalies, crustal structure and rift tectonics at the Konkan and Kerala basins, western continental margin of India

Author:
SHEENA V DEV; M RADHAKRISHNA; SHYAM CHAND; C SUBRAHMANYAM
Source:
Journal of earth system science 2012 v.121 no.3 pp. 813-822
ISSN:
0253-4126
Subject:
topography; basins; Earth system science; models; tectonics; gravity; India
Abstract:
... Litho-stratigraphic variation of sedimentary units constructed from seismic sections and gravity anomaly in the Konkan and Kerala basins of the western continental margin of India (WCMI) have been used to model processes such as lithospheric rifting mechanism, its strength, and evolution of flank uplift topography that led to the present-day Western Ghats escarpment. Based on the process-oriented ...
DOI:
10.1007/s12040-012-0186-6

6. Petrology, geochemistry of hornblende gabbro and associated dolerite dyke of Paharpur, Puruliya, West Bengal: Implication for petrogenetic process and tectonic setting

Author:
ADITI MANDAL; ARIJIT RAY; MAYUKHEE DEBNATH; SANKAR PRASAD PAUL
Source:
Journal of earth system science 2012 v.121 no.3 pp. 793-812
ISSN:
0253-4126
Subject:
zirconium; fractionation; geochemistry; Earth system science; tectonics; strontium; melting; plagioclase; barium; gneiss; India
Abstract:
... Paharpur gabbroic intrusive is an arcuate body running east–west paralleling the foliation of Chhotanagpur Granite Gneiss which acts as country rock. The main gabbroic body is intruded by a number of dolerite dykes running north–south. It is composed of clinopyroxene (Wo48En40Fs12–Wo51En40Fs09, mg no. 72–82), plagioclase (An52–An90), hornblende (magnesian hornblende to ferro-tschermackit ...
DOI:
10.1007/s12040-012-0195-5

7. Provenance of the Late Neogene Siwalik sandstone, Kumaun Himalayan Foreland Basin: Constraints from the metamorphic rank and index of detrital rock fragments

Author:
POONAM JALAL; SUMIT K GHOSH
Source:
Journal of earth system science 2012 v.121 no.3 pp. 781-792
ISSN:
0253-4126
Subject:
metamorphic rocks; Earth system science; tectonics; provenance; sandstone; Himalayan region
Abstract:
... An understanding about lithology, tectonics and unroofing history of provenance is mostly drawn from the compositional and textural parameters of the detrital fragments. We here use different metamorphic ranks (Rm) and metamorphic index (MI) values of rock fragments present in Late Neogene Siwalik sandstone of the Ramganga sub-basin to infer the provenance history. The study indicates maximum cont ...
DOI:
10.1007/s12040-012-0189-3

8. Stochastic finite-fault modelling of strong earthquakes in Narmada South Fault, Indian Shield

Author:
P SENGUPTA
Source:
Journal of earth system science 2012 v.121 no.3 pp. 837-846
ISSN:
0253-4126
Subject:
Earth system science; earthquakes; models; hazard characterization
Abstract:
... The Narmada South Fault in the Indian peninsular shield region is associated with moderate-to-strong earthquakes. The prevailing hazard evidenced by the earthquake-related fatalities in the region imparts significance to the investigations of the seismogenic environment. In the present study, the prevailing seismotectonic conditions specified by parameters associated with source, path and site con ...
DOI:
10.1007/s12040-012-0187-5

9. A new atlas of temperature and salinity for the North Indian Ocean

Author:
A CHATTERJEE; D SHANKAR; S S C SHENOI; G V REDDY; G S MICHAEL; M RAVICHANDRAN; V V GOPALKRISHNA; E P RAMA RAO; T V S UDAYA BHASKAR; V N SANJEEVAN
Source:
Journal of earth system science 2012 v.121 no.3 pp. 559-593
ISSN:
0253-4126
Subject:
Earth system science; salinity; climatology; temperature; Bay of Bengal; Indian Ocean
Abstract:
... The most used temperature and salinity climatology for the world ocean, including the Indian Ocean, is the World Ocean Atlas (WOA) (Antonov et al 2006, 2010; Locarnini et al 2006, 2010) because of the vast amount of data used in its preparation. The WOA climatology does not, however, include all the available hydrographic data from the Indian Exclusive Economic Zone (EEZ), leading to the potential ...
DOI:
10.1007/s12040-012-0191-9

10. Detection of Mg spinel lithologies on central peak of crater Theophilus using Moon Mineralogy Mapper (M3) data from Chandrayaan-1

Author:
D LAL; P CHAUHAN; R D SHAH; S BHATTACHARYA; AJAI; A S KIRAN KUMAR
Source:
Journal of earth system science 2012 v.121 no.3 pp. 847-853
ISSN:
0253-4126
Subject:
Earth system science; absorption; iron; models; magnesium; minerals; reflectance; India
Abstract:
... Spectral reflectance data derived from Moon Mineralogy Mapper (M3) onboard India’s Chandrayaan-1 has revealed Fe bearing Mg-spinel-rich lithology on central peaks of the crater Theophilus. These newly identified Fe bearing Mg-spinel-rich rock types are defined by their strong 2-μm absorption and lack of 1-μm absorptions in spectral reflectance response. Such lithology has been reported previou ...
DOI:
10.1007/s12040-012-0193-7

11. Geoinformatics for assessing the morphometric control on hydrological response at watershed scale in the Upper Indus Basin

Author:
SHAKIL AHMAD ROMSHOO; SHAKEEL AHMAD BHAT; IRFAN RASHID
Source:
Journal of earth system science 2012 v.121 no.3 pp. 659-686
ISSN:
0253-4126
Subject:
sediment yield; morphometry; Earth system science; hydrograph; geomorphology; watersheds; rain; land cover; Soil and Water Assessment Tool model; runoff; vegetation
Abstract:
... Five watersheds (W1, W2, W3, W4 and W5) in the upper Indus basin were chosen for detailed studies to understand the influences of geomorphology, drainage basin morphometry and vegetation patterns on hydrology. From the morphometric analysis, it is evident that the hydrologic response of these watersheds changes significantly in response to spatial variations in morphometric parameters. Results ind ...
DOI:
10.1007/s12040-012-0192-8

12. Occurrence of helically coiled microfossil Obruchevella in the Owk Shale of the Kurnool Group and its significance

Author:
MUKUND SHARMA; YOGMAYA SHUKLA
Source:
Journal of earth system science 2012 v.121 no.3 pp. 755-768
ISSN:
0253-4126
Subject:
sediments; Earth system science; microfossils; radiometry; burrows; limestone; shale; India
Abstract:
... The present study reports occurrence of helically coiled microfossil Obruchevella Reitlinger from the Owk Shale of the Kurnool Group from the peninsular India. The age of the Kurnool Group is poorly constrained due to the absence of direct radiometric dating and meager palaeobiological data. Occurrence of Obruchevella is considered as a typical Vendian marker genus recorded mostly from close to th ...
DOI:
10.1007/s12040-012-0182-x

13. Optimising view angles for the estimation of leaf area index via entropy-difference analysis

Author:
YANJUAN YAO; QIANG LIU; QINHUO LIU; YANHUA GAO
Source:
Journal of earth system science 2012 v.121 no.3 pp. 687-695
ISSN:
0253-4126
Subject:
canopy; Earth system science; data collection; leaf area index; entropy; remote sensing; reflectance; algorithms
Abstract:
... It is important to evaluate the information content of remote sensing data in order to synthetically use multi-source remote sensing data to improve the accuracy and consistency of land surface parameter retrieval. This paper presents a technique for information content evaluation of multi-spectral/angular remote sensing data for the leaf area index (LAI) inversion, the method of entropy-differenc ...
DOI:
10.1007/s12040-012-0178-6

14. Seasonal variability in aerosol optical and physical characteristics estimated using the application of the Ångström formula over Mohal in the northwestern Himalaya, India

Author:
RAJ PAUL GULERIA; JAGDISH CHANDRA KUNIYAL; NAND LAL SHARMA; PITAMBER PRASAD DHYANI
Source:
Journal of earth system science 2012 v.121 no.3 pp. 697-710
ISSN:
0253-4126
Subject:
winter; Earth system science; monsoon season; aerosols; seasonal variation; wavelengths; India; Himalayan region
Abstract:
... Investigations of aerosol optical and physical characteristics using the application of Ångström formula and second order polynomial fit were carried out from April 2006 to March 2009 at Mohal in the Kullu valley. The measurements of spectral aerosol optical depths (AODs) were conducted using multi-wavelength radiometer (MWR). The AOD at 0.5 μm wavelength on daily basis (mean ± standard devia ...
DOI:
10.1007/s12040-012-0194-6

15. Spectral evaluation of Earth geopotential models and an experiment on its regional improvement for geoid modelling

Author:
B EROL
Source:
Journal of earth system science 2012 v.121 no.3 pp. 823-835
ISSN:
0253-4126
Subject:
monitoring; Earth system science; models; gravity; spectral analysis; case studies; algorithms; satellites; Turkey (country)
Abstract:
... As the number of Earth geopotential models (EGM) grows with the increasing number of data collected by dedicated satellite gravity missions, CHAMP, GRACE and GOCE, measuring the differences among the models and monitoring the improvements in gravity field recovery are required. This study assesses the performance of recent EGMs derived from CHAMP, GRACE, and other data in comparison to the earlier ...
DOI:
10.1007/s12040-012-0190-x

16. Temporal geoelectric behaviour of dyke aquifers in northern Deccan Volcanic Province, India

Author:
GAUTAM GUPTA; VINIT C ERRAM; SUYASH KUMAR
Source:
Journal of earth system science 2012 v.121 no.3 pp. 723-732
ISSN:
0253-4126
Subject:
attitudes and opinions; Earth system science; canals (waterways); monsoon season; rocks; groundwater flow; aquifers; dams (hydrology); seasonal variation; groundwater; electrical resistance; India
Abstract:
... Vertical electrical resistivity soundings (VES) were carried out over four major dykes of Nandurbar district in the northern Deccan Volcanic Province (DVP) of Maharashtra to investigate the subsurface geological conditions, with an aim of identifying zones with groundwater resource potential. Dykes can act as pathways or barrier to the groundwater flow depending upon the intensity of fracturing in ...
DOI:
10.1007/s12040-012-0180-z