scholarly journals A review of Nowcasting of convective weather over the Indian region

MAUSAM ◽  
2021 ◽  
Vol 70 (3) ◽  
pp. 465-484
Author(s):  
SOMA SEN ROY ◽  
M. MOHAPATRA ◽  
AJIT TYAGI ◽  
S. K. ROY BHOWMIK
Pleione ◽  
2017 ◽  
Vol 11 (2) ◽  
pp. 455
Author(s):  
V. Saio ◽  
H. Tynsong ◽  
Shahida P. Quazi ◽  
V. P. Upadhyay ◽  
S. K. Aggarwal

2005 ◽  
Vol 20 (4) ◽  
pp. 1847-1849 ◽  
Author(s):  
P.M. Raagam ◽  
K. Rema Devi
Keyword(s):  

Author(s):  
Scott C. Levi

While it may seem counterintuitive, the increase in Mughal India’s maritime trade contributed to a tightening of overland commercial connections with its Asian neighbors. The primary agents in this process were “Multanis,” members of any number of heavily capitalized, caste-based family firms centered in the northwest Indian region of Multan. The Multani firms had earlier developed an integrated commercial system that extended across the Punjab, Sind, and much of northern India. In the middle of the sixteenth century, Multanis first appear in historical sources as having established their own communities in Central Asia and Iran. By the middle of the seventeenth century, at any given point in time, a rotating population of some 35,000 Indian merchants orchestrated a network of communities that extended across dozens, if not hundreds, of cities and villages in Afghanistan, Central Asia, and Iran, stretching up the Caucasus and into Russia.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Slobodan Nickovic ◽  
Bojan Cvetkovic ◽  
Slavko Petković ◽  
Vassilis Amiridis ◽  
Goran Pejanović ◽  
...  

AbstractIce particles in high-altitude cold clouds can obstruct aircraft functioning. Over the last 20 years, there have been more than 150 recorded cases with engine power-loss and damage caused by tiny cloud ice crystals, which are difficult to detect with aircraft radars. Herein, we examine two aircraft accidents for which icing linked to convective weather conditions has been officially reported as the most likely reason for catastrophic consequences. We analyze whether desert mineral dust, known to be very efficient ice nuclei and present along both aircraft routes, could further augment the icing process. Using numerical simulations performed by a coupled atmosphere-dust model with an included parameterization for ice nucleation triggered by dust aerosols, we show that the predicted ice particle number sharply increases at approximate locations and times of accidents where desert dust was brought by convective circulation to the upper troposphere. We propose a new icing parameter which, unlike existing icing indices, for the first time includes in its calculation the predicted dust concentration. This study opens up the opportunity to use integrated atmospheric-dust forecasts as warnings for ice formation enhanced by mineral dust presence.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Suvarna Fadnavis ◽  
Rolf Müller ◽  
Tanusri Chakraborty ◽  
T. P. Sabin ◽  
Anton Laakso ◽  
...  

AbstractThe Indian summer monsoon rainfall (ISMR) is vital for the livelihood of millions of people in the Indian region; droughts caused by monsoon failures often resulted in famines. Large volcanic eruptions have been linked with reductions in ISMR, but the responsible mechanisms remain unclear. Here, using 145-year (1871–2016) records of volcanic eruptions and ISMR, we show that ISMR deficits prevail for two years after moderate and large (VEI > 3) tropical volcanic eruptions; this is not the case for extra-tropical eruptions. Moreover, tropical volcanic eruptions strengthen El Niño and weaken La Niña conditions, further enhancing Indian droughts. Using climate-model simulations of the 2011 Nabro volcanic eruption, we show that eruption induced an El Niño like warming in the central Pacific for two consecutive years due to Kelvin wave dissipation triggered by the eruption. This El Niño like warming in the central Pacific led to a precipitation reduction in the Indian region. In addition, solar dimming caused by the volcanic plume in 2011 reduced Indian rainfall.


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