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Madhav Haridas, M. K.
- Studies of Forest Fire Induced Changes in Atmosphere over Uttarakhand, India, Using Space Based Observations and Model Simulations
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PDF Views:91
Authors
Affiliations
1 National Remote Sensing Centre, Hyderabad 500 037, IN
1 National Remote Sensing Centre, Hyderabad 500 037, IN
Source
Current Science, Vol 114, No 12 (2018), Pagination: 2504-2512Abstract
The northern Indian state of Uttarakhand had witnessed an episode of intense forest fire during April–May 2016. The present study analyses the changes in trace gas and other atmospheric constituents induced by the forest fire using satellite data. The study reveals elevated levels of CO, NO2, ozone and aerosol optical depth (AOD) over the affected region. Higher levels of CO are observed at altitudes of 2–3 km. The column amount of CO has almost doubled from mean background values, whereas NO2 has increased by almost three times to values normally seen over highly polluted cities. Increase in ozone is only moderate and AOD has risen towards the end of the main phase of the fire episode. Weather research and forecasting simulations of wind and planetary boundary layer height are also performed and the results discussed. The study shows the potential of Earth-Observation Satellites to track and monitor such environmental impacts effectively.Keywords
Aerosol Optical Depth, Forest Fire, Trace Gas.Full Text
References
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- Detection of Atmospheric Lightning Activity with Ground-Based Radiofrequency Receivers – Establishment and Initial Results
Abstract Views :250 |
PDF Views:72
Authors
Alok Taori
1,
Arun Suryavanshi
2,
R. Goenka
1,
B. Gharai
1,
M. K. Madhav Haridas
1,
M. V. R. Seshasai
1,
D. Dutta
1,
Uday Raj
1,
Chiranjivi Jayaram
3
Affiliations
1 National Remote Sensing Centre (NRSC), Hyderabad, 500 037, IN
2 Regional Remote Sensing Centre (Central), NRSC, Nagpur 440 033, IN
3 Regional Remote Sensing Centre (East), NRSC, Kolkata 700 156, IN
1 National Remote Sensing Centre (NRSC), Hyderabad, 500 037, IN
2 Regional Remote Sensing Centre (Central), NRSC, Nagpur 440 033, IN
3 Regional Remote Sensing Centre (East), NRSC, Kolkata 700 156, IN
Source
Current Science, Vol 118, No 7 (2020), Pagination: 1112-1117Abstract
Understanding atmospheric lightning flashes and their occurrences is one of the most important aspects of the Earth’s climate science. Real-time lightning data have profound importance in climate science, air-quality research and atmospheric nitrogen budget, apart from lightning being one of the major natural disasters. Keeping these in view, a lightning detection sensor (LDS) network has been established at six locations in India, viz. Kolkata, Ranchi, Raipur, Bhubaneswar, Nagpur and Visakhapatnam. Preliminary analysis of the data suggests that it is possible to detect the phenomenon and identify vulnerable zones of lightning activity. We analysed the Kolkata, Ranchi and Visakhapatnam data during June–July 2017 to identify the areas with major impact by cloud-to-ground lightning events and also see if a warning can be provided based on single-sensor data. Status of the ongoing development in LDS network is discussed here based on the current understanding of existing lightning detection networks.Keywords
Cloud-to-ground Events, Lighting Detection, Natural Hazards, Radiofrequency Sensors.Full Text
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