The major lightning regions and associated casualties over India     

Yadava  Pramod Kumar  Soni  Manish  Verma  Sunita  Kumar  Harshbardhan  Sharma  Ajay  Payra  Swagata 《Natural Hazards》2020,101(1):217-229

Natural Hazards - Lightning, a climate-related highly localized natural phenomenon, claims lives and damage properties. These losses could only be reduced by the identification of active seasons...  相似文献   

Rapid flash flood calamity in Chamoli,Uttarakhand region during Feb 2021: an analysis based on satellite data     

Verma  Sunita  Sharma  Ajay  Yadava  Pramod Kumar  Gupta  Priyanshu  Singh  Janhavi  Payra  Swagata 《Natural Hazards》2022,112(2):1379-1393

Natural Hazards - The present study investigates the accelerating factors for extreme flash flood at Chamoli district of Uttarakhand on 7 February 2021. The Sentinel-2A and 2B satellite data have...  相似文献   

Aerosol particle behavior during Dust Storm and Diwali over an urban location in north western India     

Prakash  Divya  Payra  Swagata  Verma  Sunita  Soni  Manish 《Natural Hazards》2013,69(3):1767-1779

In this study, the aerosol behavior during two contradictory events, i.e., dust storm (DS) and Diwali (DW) has been studied over Jaipur. The aerosol particle number concentration shows distinct features between DS and DW events. The total ANC was found minimum during DS while maximum during DW. The 24 h mean of total ANC was 9.15 × 10⁴ (±7.71 × 10⁴) and 5.38 × 10⁵ (±3.73 × 10⁵ particles/l) during DS and DW, respectively. The total ANC increases from 7.78 × 10⁴ to 5.32 × 10⁵ and 3.52 × 10⁵ to 1.70 × 10⁶ particles/l in 24 h during DS and DW, respectively. In DS, the ANC in coarse mode (2 < particle diameter < 20 μm) is significantly high while in DW, the ANC in fine mode (0.3 < particle diameter < 2 μm) exhibits higher concentration. During dust episode, a significant change in ANC (3.0 × 10³ to 1.12 × 10⁵ particles/l) was observed for the particle of size range in 2.0–20 μm with a slight increase in particles number concentration (7.48 × 10⁴ to 4.20 × 10⁵ particles/l) in 0.3–2.0 μm range is also observed. During DS, the fine and coarse mode particles increased 4.61 and 36.44 times while during DW, it increased 3.83 and 0.95 times, respectively. The relatively high particle levels during DW are attributed for two reasons: local emissions due to burning of fire crackers and meteorological conditions, i.e., low wind speeds and low mixing-layer heights lead to relatively high particle concentrations.

  相似文献