Phase relation between CAPE and precipitation at diurnal scales over the Indian summer monsoon region

2015 ◽  
Vol 16 (3) ◽  
pp. 346-354 ◽  
Author(s):  
Kandula Venkata Subrahmanyam ◽  
Karanam Kishore Kumar ◽  
Alur Narendra Babu
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Phase Relation ◽  
Monsoon Region ◽  
Summer Monsoon Region

scholarly journals Land surface processes over Indian summer monsoon region: A review

MAUSAM ◽  
2021 ◽  
Vol 70 (4) ◽  
pp. 691-708
Author(s):  
U. C. MOHANTY ◽  
H. P. NAYAK ◽  
P. SINHA ◽  
K. K. OSURI ◽  
D. NIYOGI
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Land Surface ◽  
Surface Processes ◽  
Monsoon Region ◽  
Land Surface Processes ◽  
Summer Monsoon Region

scholarly journals A long-term observational analysis of aerosol-cloud-rainfall associations over Indian Summer Monsoon region

2016 ◽  
Author(s):  
Chandan Sarangi ◽  
Sachchida Nand Tripathi ◽  
Vijay P. Kanawade ◽  
Ilan Koren ◽  
D. Sivanand Pai
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Satellite Observations ◽  
Monsoon Region ◽  
Cloud Systems ◽  
Aerosol Cloud ◽  
Aerosol Loading ◽  
Surface Rainfall ◽  
Summer Monsoon Region ◽  
Ice Phase

Abstract. Monsoonal rainfall is the primary source of surface water in India. Using 12 years of in-situ and satellite observations, we examined association of aerosol loading with cloud fraction, cloud top pressure, cloud top temperature, and daily surface rainfall over Indian summer monsoon region (ISMR). The analyses showed positive correlations between aerosol loading and cloud properties as well as rainfall. A decrease in outgoing longwave radiation and increase in reflected shortwave radiation at the top of the atmosphere with an increase in aerosol loading further supported a seminal role of aerosols on cloud systems. Significant perturbation in liquid- and ice-phase microphysics was also evident over ISMR. For the polluted cases, delay in the onset of collision-coalescence processes and enhancement in the condensation efficiency, allows for more condensate mass to be lifted up to the mixed-colder phases. This results in the higher mass concentration of bigger sized ice-phase hydrometeors and, therefore, implies that the delayed rain processes eventually lead to more surface rainfall. Numerical simulation of a typical rainfall event case over ISMR using spectral bin microphysical scheme coupled with Weather Research Forecasting (WRF-SBM) model was also performed. Simulated microphysics also illustrated the initial suppression of warm rain coupled with increase in updraft velocity under high aerosol loading leads to enhanced super-cooled liquid droplets above freezing level and ice-phase hydrometeors, resulting in increased accumulated surface rainfall. Thus, both observational and numerical analysis suggest that high aerosol loading may induce cloud invigoration and thereby increasing surface rainfall over the ISMR. While the meteorological variability influence the strength of the observed positive associations, our results suggest that the persistent aerosol-associated deepening of cloud systems and intensification of surface rain amounts was applicable to all the meteorological sub-regimes over the ISMR. Hence, we believe that these results provide a step forward in our ability to address aerosol-cloud-rainfall associations based on satellite observations over ISMR.

scholarly journals Behavior of predicted convective clouds and precipitation in the high-resolution Unified Model over the Indian summer monsoon region

2017 ◽  
Vol 4 (5) ◽  
pp. 303-313 ◽  
Author(s):  
A. Jayakumar ◽  
Jisesh Sethunadh ◽  
R. Rakhi ◽  
T. Arulalan ◽  
Saji Mohandas ◽  
...  
Keyword(s):  
High Resolution ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Unified Model ◽  
Monsoon Region ◽  
Convective Clouds ◽  
Summer Monsoon Region

scholarly journals Investigation of the aerosol–cloud–rainfall association over the Indian summer monsoon region

2017 ◽  
Vol 17 (8) ◽  
pp. 5185-5204 ◽  
Author(s):  
Chandan Sarangi ◽  
Sachchida Nand Tripathi ◽  
Vijay P. Kanawade ◽  
Ilan Koren ◽  
D. Sivanand Pai
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Satellite Observations ◽  
Monsoon Region ◽  
Cloud Systems ◽  
Aerosol Cloud ◽  
Aerosol Loading ◽  
Surface Rainfall ◽  
Summer Monsoon Region ◽  
Ice Phase

Abstract. Monsoonal rainfall is the primary source of surface water in India. Using 12 years of in situ and satellite observations, we examined the association of aerosol loading with cloud fraction, cloud top pressure, cloud top temperature, and daily surface rainfall over the Indian summer monsoon region (ISMR). Our results showed positive correlations between aerosol loading and cloud properties as well as rainfall. A decrease in outgoing longwave radiation and an increase in reflected shortwave radiation at the top of the atmosphere with an increase in aerosol loading further indicates a possible seminal role of aerosols in the deepening of cloud systems. Significant perturbation in liquid- and ice-phase microphysics was also evident over the ISMR. For the polluted cases, delay in the onset of collision–coalescence processes and an enhancement in the condensation efficiency allows for more condensate mass to be lifted up to the mixed colder phases. This results in the higher mass concentration of larger-sized ice-phase hydrometeors and, therefore, implies that the delayed rain processes eventually lead to more surface rainfall. A numerical simulation of a typical rainfall event case over the ISMR using a spectral bin microphysical scheme coupled with the Weather Research Forecasting (WRF-SBM) model was also performed. Simulated microphysics also illustrated that the initial suppression of warm rain coupled with an increase in updraft velocity under high aerosol loading leads to enhanced super-cooled liquid droplets above freezing level and ice-phase hydrometeors, resulting in increased accumulated surface rainfall. Thus, both observational and numerical analysis suggest that high aerosol loading may induce cloud invigoration, thereby increasing surface rainfall over the ISMR. While the meteorological variability influences the strength of the observed positive association, our results suggest that the persistent aerosol-associated deepening of cloud systems and an intensification of surface rain amounts was applicable to all the meteorological sub-regimes over the ISMR. Hence, we believe that these results provide a step forward in our ability to address aerosol–cloud–rainfall associations based on satellite observations over the ISMR.

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