On the Predictability of Northeast Monsoon Rainfall over South Peninsular India in General Circulation Models

2013 ◽  
Vol 170 (11) ◽  
pp. 1945-1967 ◽  
Author(s):  
Archana Nair ◽  
Nachiketa Acharya ◽  
Ankita Singh ◽  
U. C. Mohanty ◽  
T. C. Panda
Keyword(s):  
General Circulation ◽  
Monsoon Rainfall ◽  
General Circulation Models ◽  
Northeast Monsoon ◽  
Peninsular India ◽  
Northeast Monsoon Rainfall

Combined effect of MJO, ENSO and IOD on the intraseasonal variability of northeast monsoon rainfall over south peninsular India

2018 ◽  
Vol 51 (9-10) ◽  
pp. 3865-3882 ◽  
Author(s):  
P. P. Sreekala ◽  
S. Vijaya Bhaskara Rao ◽  
K. Rajeevan ◽  
M. S. Arunachalam
Keyword(s):  
Monsoon Rainfall ◽  
Intraseasonal Variability ◽  
Combined Effect ◽  
Northeast Monsoon ◽  
Peninsular India ◽  
Northeast Monsoon Rainfall

scholarly journals Role and impact of Siberian High on the temporal variation of Indian northeast monsoon rainfall

MAUSAM ◽  
2021 ◽  
Vol 60 (4) ◽  
pp. 505-520
Author(s):  
B. GEETHA ◽  
Y. E. A. RAJ
Keyword(s):  
Bay Of Bengal ◽  
Tamil Nadu ◽  
Monsoon Rainfall ◽  
Northeast Monsoon ◽  
Peninsular India ◽  
Sea Level Pressure ◽  
Siberian High ◽  
Northeast Monsoon Rainfall ◽  
Latitudinal Position ◽  
The Relationship

The relation between the intensity of Siberian High, defined as the mean sea level pressure over the Siberian region bounded by 87.5 & 102.5° E longitudes and 47.5 & 52.5° N latitudes (PSH) and Indian northeast monsoon rainfall has been studied in antecedent and concurrent modes based on monthly/seasonal mean PSH and monthly/seasonal rainfall data of Tamil Nadu (NMR) for the 34 year period, 1971 to 2004. It has been found that a positive relationship exists between the PSH and NMR of October-November (ON) which is significant in the antecedent mode [PSH(AS/Sep)] and modest in concurrent mode. The relationship turns negative for NMR (Dec) with both PSH(Sep) (antecedent) and PSH(Dec) (concurrent).  By and large, negative anomaly profile of PSH during September-November (SON) followed by a positive PSH (Dec) anomaly is associated with a deficient NMR, but, a normal to positive PSH anomaly profile in SON becoming  negative in December is associated with an excess NMR. The manifestation of PSH on NMR has been shown to be by way of modulating the strength of low level easterlies over the Bay of Bengal off the southeast coast of peninsular India as well as the latitudinal positions of Sub Tropical Ridge at 200 hPa (STR) and Equatorial Trough at 850 hPa (ET) over India.  An intense PSH (Sep) is associated with strengthening of easterlies over the Bay of Bengal as well as southward location of STR/ET thereby favouring  a good NMR (ON).  During December, a weaker than normal PSH (Dec) is associated with northward location of ET from its normal latitudinal position near the equator which becomes conducive for good NMR(Dec). That a weaker than normal PSH in December is associated with good NMR(Dec) is comprehended from an analysis of time series of PSH.  It has been found that the PSH itself undergoes a phase change in December on most occasions, i.e., an intense PSH (Nov) is by and large, followed by a weaker than normal PSH (Dec) and vice versa.

scholarly journals Multi-model ensemble schemes for predicting northeast monsoon rainfall over peninsular India

2011 ◽  
Vol 120 (5) ◽  
pp. 795-805 ◽  
Author(s):  
NACHIKETA ACHARYA ◽  
S C KAR ◽  
MAKARAND A KULKARNI ◽  
U C MOHANTY ◽  
L N SAHOO
Keyword(s):  
Monsoon Rainfall ◽  
Northeast Monsoon ◽  
Model Ensemble ◽  
Peninsular India ◽  
Northeast Monsoon Rainfall

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.

Northeast monsoon rainfall variability over the southern Peninsular India associated with multiyear La Niña events

2019 ◽  
Vol 53 (9-10) ◽  
pp. 6265-6291 ◽  
Author(s):  
K. Prasanna ◽  
Prem Singh ◽  
Jasti S. Chowdary ◽  
C. V. Naidu ◽  
Anant Parekh ◽  
...  
Keyword(s):  
Monsoon Rainfall ◽  
Rainfall Variability ◽  
La Niña ◽  
Northeast Monsoon ◽  
Peninsular India ◽  
La Nina ◽  
Northeast Monsoon Rainfall
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