scholarly journals The Anomalous Character of Northeast Monsoon Precipitation over Southern India-Revelation Through an Array of Instrumental, Proxy Records and Future Projections

2020 ◽  
Author(s):  
Sayak Basu ◽  
Prasanta Sanyal ◽  
Ambili Anoop
Keyword(s):  
Southern India ◽  
Northeast Monsoon ◽  
Monsoon Precipitation ◽  
Future Projections ◽  
Proxy Records ◽  
Anomalous Character

Palaeoflood Records from Upper Kaveri River, Southern India: Evidence for Discrete Floods During Holocene

2010 ◽  
Vol 37 (-1) ◽  
pp. 49-55 ◽  
Author(s):  
Vishwas Kale ◽  
Hema Achyuthan ◽  
Manoj Jaiswal ◽  
Somasis Sengupta
Keyword(s):  
Flash Floods ◽  
Southern India ◽  
Western Ghat ◽  
Flood Events ◽  
Monsoon Precipitation ◽  
Short Term ◽  
Gradual Decline ◽  
High Discharge ◽  
Flood Level ◽  
High Flood

Palaeoflood Records from Upper Kaveri River, Southern India: Evidence for Discrete Floods During Holocene A record of six discrete middle Holocene floods has been established based on sedimentological and stratigraphical studies in the upper Kaveri catchment at Siddapur. The flood events are represented by six discrete, sharp-bounded, sand-silt couplets. Texturally and geochemically the suite of couplets is quite distinct from the overlying and underlying structureless fluvial deposits. Based on OSL ages the suite of couplets cover the Holocene from ~8 to ~2 ka. Such evidence is not present or reported from any other river originating in the Western Ghat in the Indian Peninsula. We argue that the six couplets represent short-term, high discharge events or flash floods. The initiation of this phase of flash floods broadly corresponds with the southward migration of ITCZ and a gradual decline in Indian summer monsoon precipitation starting at ~7.8 ka. Comparison of the elevation of the highest couplet with the high flood level (HFL) of the 1961 extraordinary flood on Kaveri demonstrates that the 20th century flood was higher than the mid-Holocene palaeofloods.

scholarly journals The effect of ENSO / Anti ENSO on northeast monsoon rainfall

MAUSAM ◽  
2021 ◽  
Vol 50 (4) ◽  
pp. 343-354
Author(s):  
U. S. DE ◽  
R. K. MUKHOPADHYAY
Keyword(s):  
Tamil Nadu ◽  
Arabian Sea ◽  
Monsoon Rainfall ◽  
Southern Oscillation ◽  
Northeast Monsoon ◽  
Monsoon Precipitation ◽  
Peninsular India ◽  
Enso Events ◽  
The North ◽  
Northeast Monsoon Rainfall

Northeast monsoon precipitation data of 5 meteorological sub-divisions in India, spanning the period 1901-97, were analysed to identify the effect of ENSO/Anti ENSO events on the rainfall over southern peninsular India. ENSO/Anti ENSO years were selected on the basis of seasonal Southern Oscillation Index (SOI). The analysis revealed that ENSO years were generally associated with enhanced northeast monsoon precipitation while there was reduced precipitation during Anti ENSO years, the reduction in Anti ENSO years being significant for Tamil Nadu (at 0.1% level), for Kerala (at 1% level) and for South Peninsular India (at 1% level). Of 22 ENSO years, 18 years were found to be either flood or wet years, while 11 years out of 15 Anti ENSO years were found to be either drought or dry years.   During ENSO years, the Sea Surface Temperature (SST) anomalies both over the Arabian Sea and the Bay of Bengal were positive during the months October to December, while the reverse was the case during Anti ENSO years. A concurrent significant positive correlation was noted between SST over east central Arabian Sea and the north central Bay regions and northeast monsoon rainfall.   The cyclonic systems were observed to form relatively at lower latitudes during ENSO years as compared to those during Anti ENSO years. These systems were also found to move in a more westerly direction, hit Tamil Nadu and south Andhra coast, thus giving more rain over peninsula during ENSO years. The ridge line at 200 hPa level during ENSO years was located 3° south as compared to its location during Anti ENSO years.

Southern India sees drop in HIV

Nature ◽  
2006 ◽  
Author(s):  
Helen Pearson
Keyword(s):  
Southern India

Description of a new species of Callocleonymus Masi (Hymenoptera: Chalcidoidea: Pteromalidae) from India

ENTOMON ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 111-116
Author(s):  
Ankita Gupta ◽  
Namitha George ◽  
P. M. Sureshan
Keyword(s):  
New Species ◽  
Southern India ◽  
Indian Species ◽  
A New Species

The first Indian species of the genus Callocleonymus Masi viz. C. indiaensis sp. nov., is formally described from Bengaluru in southern India.

Transient high-resolution regional climate simulation for Greece over the period 1960-2100: evaluation and future projections

2015 ◽  
Vol 64 (2) ◽  
pp. 123-140 ◽  
Author(s):  
P Zanis ◽  
E Katragkou ◽  
C Ntogras ◽  
G Marougianni ◽  
A Tsikerdekis ◽  
...  
Keyword(s):  
High Resolution ◽  
Regional Climate ◽  
Climate Simulation ◽  
Regional Climate Simulation ◽  
Future Projections
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