scholarly journals Progress Towards Achieving the Challenge of Indian Summer Monsoon Climate Simulation in a Coupled Ocean-Atmosphere Model

2017 ◽  
Vol 9 (6) ◽  
pp. 2268-2290 ◽  
Author(s):  
Anupam Hazra ◽  
Hemantkumar S. Chaudhari ◽  
Subodh Kumar Saha ◽  
Samir Pokhrel ◽  
B. N. Goswami
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Climate Simulation ◽  
Monsoon Climate ◽  
Ocean Atmosphere ◽  
Atmosphere Model

scholarly journals Indian Ocean and Indian summer monsoon: relationships without ENSO in ocean–atmosphere coupled simulations

2016 ◽  
Vol 49 (4) ◽  
pp. 1429-1448 ◽  
Author(s):  
Julien Crétat ◽  
Pascal Terray ◽  
Sébastien Masson ◽  
K. P. Sooraj ◽  
Mathew Koll Roxy
Keyword(s):  
Indian Ocean ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Ocean Atmosphere

Drivers of the Indian summer monsoon climate variability

2021 ◽  
pp. 1-28
Author(s):  
Jasti S. Chowdary ◽  
Shang-Ping Xie ◽  
Ravi S. Nanjundiah
Keyword(s):  
Climate Variability ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Monsoon Climate

scholarly journals Sensitivity of Soil Water in Community Atmosphere Model (CAM3) for Indian Summer Monsoon (ISM)

2020 ◽  
pp. 397-410
Author(s):  
Sukanta Kumar Das
Keyword(s):  
Soil Water ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Soil Conditions ◽  
Community Atmosphere Model ◽  
Accumulated Rainfall ◽  
Dry Soil ◽  
Atmosphere Model ◽  
The Impact ◽  
The Relationship

The study has been attempted to investigate the relationship between the soil-water and the Indian summer monsoon (ISM) rainfall through the simulation of a global climate model named Community Atmosphere Model (CAM3). Two sets of simulation have been done during monsoon season for the years 2009 to 2012 using the pre-monsoon (May) and the previous winter season (December of previous year) state of soil-water as the model initial conditions. The control simulation and four sensitivity cases assuming 25% and 50% dryer and wetter soil-water respectively have been considered for all the aforesaid four years and for both the set of experiments. It has been observed that the impact of upper level soil-water persist for 15 to 20 days of simulation during the summer monsoon; the middle and lower layer soil state persist for a longer period of time due to its slow-varying nature with time. The daily surface temperature shows strong coupling with the upper layer of soil-water. When taken into comparison with the wet soil conditions, the dry soil state in most of the circumstances causes less rainfall.  The Pearson correlation coefficient (PCC) and partial correlation technique have been implied to demonstrate the relationship between the daily soil-water columns, subsequent 30-days accumulated rainfall and past 21-days accumulated rainfall. Strong negative correlation has been reported between the soil-water and subsequent 30-days accumulated (All-India Rainfall) AIR for different simulation cases with dry soil conditions; however, the relation weakened and turned positive over some parts of the region for the simulations with wet soil conditions.

The role of water vapor and cloud feedback on the evolution of the Indian summer monsoon over the last 22,000 years

2020 ◽  
Author(s):  
Chetankumar Jalihal ◽  
Jayaraman Srinivasan ◽  
Arindam Chakraborty
Keyword(s):  
Water Vapor ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Climate Simulation ◽  
Net Energy ◽  
Effect Of Water ◽  
Radiative Feedbacks ◽  
The Impact ◽  
The Last Glacial

<p>In the paleo literature, the emphasis has been on the role of insolation in driving monsoons on orbital timescales, but not on the role of feedbacks internal to the climate system. Here, using the energetics framework, we have underscored the effect of water vapor on the Indian summer monsoon over the last 22,000 years in transient climate simulation, called the TraCE-21K. We show that water vapor amplifies the impact of variations in insolation during cold climates like the Last Glacial Maximum. Insolation affects water vapor through its impact on sea surface temperature. During warmer periods like the Holocene, insolation drives monsoon through its influence on the net energy at the top of the atmosphere. Cloud radiative feedbacks are prominent during these periods. Thus, there are two pathways through which insolation drives monsoons. These pathways can be delineated quantitatively using the energetics. We show further that simultaneous variations in greenhouse gases and ice sheets enhance the effect of water vapor on monsoons. Hence, the sensitivity of monsoon to local summer insolation is different during different periods. Our results suggest that feedbacks play a crucial role in the evolution of Indian monsoon on orbital timescales.</p>

scholarly journals Roles of land surface albedo and horizontal resolution on the Indian summer monsoon biases in a coupled ocean–atmosphere tropical-channel model

2016 ◽  
Vol 48 (5-6) ◽  
pp. 1571-1594 ◽  
Author(s):  
Guillaume Samson ◽  
Sébastien Masson ◽  
Fabien Durand ◽  
Pascal Terray ◽  
Sarah Berthet ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Land Surface ◽  
Surface Albedo ◽  
Channel Model ◽  
Horizontal Resolution ◽  
Ocean Atmosphere

scholarly journals Projection of Indian summer monsoon climate in 2041-2060 by multiregional and global climate models

2015 ◽  
Vol 120 (5) ◽  
pp. 1776-1793 ◽  
Author(s):  
Xiaorui Niu ◽  
Shuyu Wang ◽  
Jianping Tang ◽  
Dong-Kyou Lee ◽  
William Gutowski ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Climate Models ◽  
Global Climate ◽  
Global Climate Models ◽  
Monsoon Climate

scholarly journals Large scale fluctuations of the Continental Tropical Convergence Zone (CTCZ) during pilot CTCZ phase-2009 and the evolution of monsoon drought in 2009

MAUSAM ◽  
2021 ◽  
Vol 61 (1) ◽  
pp. 47-74 ◽  
Author(s):  
D. R. SIKKA ◽  
AJIT TYAGI ◽  
L. C. RAM
Keyword(s):  
Summer Monsoon ◽  
Large Scale ◽  
Monsoon Season ◽  
Convergence Zone ◽  
Pilot Phase ◽  
Monsoon Climate ◽  
Summer Monsoon Season ◽  
Complex Interactions ◽  
Ocean Atmosphere ◽  
Regional Monsoon

Summer monsoon season of the year 2009 resulted in a major drought on the scale of India with rainfall deficiency of 23% from the normal. This was the monsoon season when a pilot phase of the programme Continental Tropical Convergence Zone (CTCZ), a planned multiyear programme to understand the complex interactions among the land, ocean, atmosphere, biosphere components of the regional monsoon climate system, was undertaken. The paper attempts to document the major features in the evolution of monsoon 2009 and provides a preliminary diagnosis of the causes for monsoon drought.

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