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Co-Authors
- D. C. S. Raju
- Sourav Das
- Abhra Chanda
- Suparna Dey
- Sanjibani Banerjee
- Anirban Mukhopadhyay
- Anirban Akhand
- Amit Ghosh
- Subhajit Ghosh
- Sugata Hazra
- Aneesh A. Lotliker
- K. H. Rao
- S. B. Choudhury
- V. K. Dadhwal
- K. K. Barik
- R. Annadurai
- S. R. Panda
- J. K. Tripathy
- Shuchita Srivastava
- Asfa Siddiqui
- Prakash Chauhan
Journals
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Mitra, D.
- Carrion Flowers of Coromandel
Abstract Views :129 |
PDF Views:104
Authors
D. C. S. Raju
1,
D. Mitra
1
Affiliations
1 Botanical Survey of India, Howrah, IN
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 36, No 1-4 (1994), Pagination: 233-234Abstract
Stapelia umbellata Roxb. (Asclepiadaceae), a native species of Coromandel coast is described and its value as an ornamental is discussed.Full Text
- Comparing the Spatio-Temporal Variability of Remotely Sensed Oceanographic Parameters between the Arabian Sea and Bay of Bengal throughout a Decade
Abstract Views :246 |
PDF Views:99
Authors
Sourav Das
1,
Abhra Chanda
1,
Suparna Dey
1,
Sanjibani Banerjee
1,
Anirban Mukhopadhyay
1,
Anirban Akhand
1,
Amit Ghosh
1,
Subhajit Ghosh
1,
Sugata Hazra
1,
D. Mitra
2,
Aneesh A. Lotliker
3,
K. H. Rao
4,
S. B. Choudhury
4,
V. K. Dadhwal
4
Affiliations
1 School of Oceanographic Studies, Jadavpur University, 188 Raja S. C. Mullick Road, Kolkata 700 032, IN
2 Indian Institute of Remote Sensing, 4, Kalidas Road, Dehradun 248 001, IN
3 Indian National Centre for Ocean Information Services, Kukatpally, Hyderabad 500 090, IN
4 National Remote Sensing Centre, Balanagar, Hyderabad 500 042, IN
1 School of Oceanographic Studies, Jadavpur University, 188 Raja S. C. Mullick Road, Kolkata 700 032, IN
2 Indian Institute of Remote Sensing, 4, Kalidas Road, Dehradun 248 001, IN
3 Indian National Centre for Ocean Information Services, Kukatpally, Hyderabad 500 090, IN
4 National Remote Sensing Centre, Balanagar, Hyderabad 500 042, IN
Source
Current Science, Vol 110, No 4 (2016), Pagination: 627-639Abstract
The spatio-temporal variability of sea-surface temperature (SST), photosynthetically active radiation (PAR), chlorophyll-a (Chl-a), particulate organic carbon (POC) and particulate inorganic carbon (PIC) was evaluated in the Arabian Sea (ABS) and Bay of Bengal (BoB), from July 2002 to November 2014 by means of remotely sensed monthly composite Aqua MODIS level-3 data having a spatial resolution of 4.63 km. Throughout the time period under consideration, the surface waters of ABS (27.76±1.12°C) were slightly cooler than BoB (28.93±0.76°C); this was observed during all the seasons. On the contrary, the availability of PAR was higher in ABS (45.76±3.41 mol m-2 d-1) compared to BoB (41.75±3.75 mol m-2 d-1), and its spatial dynamics in the two basins was mainly regulated by cloud cover and turbidity of the water column. The magnitude and variability of Chl-a concentration were substantially higher in ABS (0.487±0.984 mg m-3), compared to BoB (0.187±0.243 mg m-3), and spatially higher values were observed near the coastal waters. Both POC and PIC exhibited higher magnitudes in ABS compared to BoB; however, the difference was substantially high in case of POC. None of the parameters showed any significant temporal trend during the 12-year span, except PIC, which exhibited a significant decreasing trend in ABS.Keywords
Marine Ecosystems, Oceanographic Parameters, Remote Sensing, River Basins, Spatio-Temporal Variability.Full Text
References
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- Spatio-Temporal Study of Coastal Dynamics in Odisha Coast, East Coast of India
Abstract Views :548 |
PDF Views:245
Authors
Affiliations
1 School of Civil Engineering, SRM University, Chennai-603203, IN
2 Department of Earth Sciences, Sambalpur University, Burla-768019, IN
3 Indian Institute of Remote Sensing, ISRO, Dehradun-248001, IN
1 School of Civil Engineering, SRM University, Chennai-603203, IN
2 Department of Earth Sciences, Sambalpur University, Burla-768019, IN
3 Indian Institute of Remote Sensing, ISRO, Dehradun-248001, IN
Source
International Journal of Earth Sciences and Engineering, Vol 10, No 4 (2017), Pagination: 878-884Abstract
The present study illustrates the integral approach of remote sensing and GIS for the assessment of coastal environment of a part of coastal Odisha. Multispectral and multi-temporal Landsat satellite imageries along with Linear Imaging Self scanning Sensor (LISS IV) data were used to carry out this piece of work. In this paper, an attempt has been made to study the coastal dynamics i.e., landuse/landcover (LULC), erosion and accretion of a part of Odisha coast (Baleswar, Bhadrak, Kendrapara and Jagatsinghpur districts). Supervised classification adopting maximum likelihood method was applied to analyze this work. The study resulted in different classes like Sand, mangroves, wetland, Plantation with settlement, forest, agricultural land etc. The LULC map showed that the area under plantation with settlement was larger than any other class and it also showed reduction of agricultural land in all the districts of the coastal environment. Similarly, mangroves increased in all the coastal districts. Shoreline changes (Erosion and accretion) were identified through maximum likelihood method. The analysis of LULC and shoreline changes in the study area revealed significant variations. The result showed increase in plantation with settlement and decrease in agricultural land. The map prepared for this research will contribute to both the landuse planner as well as the coastal planners for shoreline protection measurement.Keywords
LULC, Erosion, Accretion, LISS IV, Odisha Coast.Full Text
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- Effect of COVID-19 Lockdown on the Spatio-temporal Distribution of Nitrogen Dioxide Over India
Abstract Views :230 |
PDF Views:87
Authors
Affiliations
1 Marine and Atmospheric Sciences Department, Indian Institute of Remote Sensing, Dehradun 248 001, IN
1 Marine and Atmospheric Sciences Department, Indian Institute of Remote Sensing, Dehradun 248 001, IN
Source
Current Science, Vol 120, No 2 (2021), Pagination: 368-375Abstract
The nationwide lockdown was implemented in India from 25 March 2020 onwards to control the spread of deadly Coronavirus disease 2019 (COVID-19). A sudden shutdown of anthropogenic activities resulted in abrupt decrease of nitrogen dioxide (NO2) across the Indian region. OMI (Ozone Monitoring Instrument) tropospheric column NO2 observations show significantly decreased values during 2020 compared to previous years during 25 March to 19 April. The spatiotemporal variation of tropospheric column NO2 difference between 2020 and average 2017–2019 shows reduction by more than 1 × 1015 molecules/cm2 over the Indo Gangetic Plain, eastern and southern India due to lockdown. However, the western Indian region shows slight enhancement which may be attributed to combined effect of transport of polluted air from Middle East and Pakistan, and relatively higher biomass burning activity during 2020. A significant reduction is also observed on the surface distribution of NOx (NO + NO2) over different Indian cities due to COVID-19 lockdown. Maximum reduction in daily average surface NOx is observed over Kolkata (65.2 ± 18.7 ppbv to 30.3 ± 4.6 ppbv) followed by New Delhi (38.8 ± 17.5 ppbv to 11.5 ± 2.9 ppbv) which may be attributed to vehicle fleet, type of fuel used, power plants and industrial emissions.Keywords
COVID-19 Lockdown, Nitrogen Dioxide, NOx, OMI.Full Text
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