Centre for Atmospheric and Oceanic Sciences (CAOS): Recent submissions
Now showing items 61-80 of 100
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Role of Aerosols in Modulating the Intraseasonal Oscillations of Indian Summer Monsoon
(2017-12-05)In this thesis, we have presented a systematic analysis of the change of cloud properties due to variation in aerosol concentration over Indian region using satellite observations, and Weather Research and Forecasting Model ... -
A Tale of Two Gradients : Atmospheric Dynamics in an Inhomogeneous Background
(2017-11-29)The effects of a non-zero background state on atmospheric dynamics is explored through simple models and observations. Firstly, we examine the effects of moisture gradients on the stability and propagation of Rossby waves ... -
Modeling of Solar Radiation Management : A Comparison of Simulations using Reduced Solar Constant and Stratospheric Aerosols
(2017-11-22)The climatic effects of Solar Radiation Management (SRM) geoengineering have been often modeled by simply reducing the solar constant. This is most likely valid only for space sunshades and not for atmosphere and surface ... -
Fine-Scale Structure Of The Diurnal Cycle Of Global Tropical Rainfall
(2016-11-16)The fine-scale structure of global (30N-30S) tropical rainfall is characterised using 13 years (1998-2010) of 3-hourly and daily, 0.25-degree Tropical Rainfall Measuring Mission (TRMM) 3B42 rainfall product. At the outset, ... -
Scaling Characteristics Of Tropical Rainfall
(2016-11-15)We study the space-time characteristics of global tropical rainfall. The data used is from the Tropical Rainfall Measuring Mission (TRMM) and spans the years 2000-2009. Using anomaly fields constructed by removing a single ... -
Role Of Sea Surface Temperature Gradient In Intraseasonal Oscillation Of Convection In An Aquaplanet Model
(2016-11-15)In this thesis we examine intra-seasonal oscillations (ISO) in the aqua-planet setup of the Community Atmospheric Model (CAM) version 5.1, mainly based on July and January climatological sea surface temperature (SST). We ... -
Variation Of Marine Boundary Layer Characteristic Over Bay Of Bengal And Arabian Sea
(2016-05-04)The atmospheric boundary layer (ABL) is the lowest layer of the atmosphere where surface effects are felt on time scales of about an hour. While its properties are determined by the surface characteristics, season and ... -
Water Soluble Inorganic Aerosol Chemical Characteristics Over An Urban Site In Southern India
(2015-12-08)Aerosol are solid or liquid particles suspended in the atmosphere ranging in size from 10 3 to 102 m. Aerosol influence both the regional and global climate of the earth by its direct and indirect effect. Role of atmospheric ... -
Assesment Of Air Quality And Anthropogenic Aerosol Fraction Over India Using Observations And Model
(2014-12-11)Air quality degradation is emerging to be an issue of major concern in India. Recent investigations have shown that anthropogenic aerosols have significant impact on climate as well as on health. In fourth assessment report ... -
Observed Subseasonal Variability Of Temperarture And Salinity In The Tropical Indian Ocean
(2013-06-10)Subseasonal variability of tropical Indian Ocean sea surface temperature is thought to influence the active-break cycle of the Asian monsoon. There are several open questions related to the role of surface fluxes, large-scale ... -
A Two Dimensional Plume In A Rotating Fluid
(2012-05-30) -
Retrieval Of Dust Aerosols Using METEOSAT Infrared Radiance
(2011-05-04) -
Investigation Of Aerosol Characteristics Over Inland, Coastal And Island Locations In India
(2011-02-10)This thesis is based on measurements of aerosol optical and microphysical properties made at inland, coastal and island locations in India. Aerosol vertical distribution measurements have also been made both using surface ...