Bhat

Information about Bhat

Published on November 21, 2007

Author: Mentor

Source: authorstream.com

Content

Slide1:  Science and Observation Plans CTCZ & STORM G. S. Bhat Centre for Atmospheric & Oceanic Sciences Indian Institute of Science Bangalore India The 1st MAHASRI/AMY Workshop, Tokyo 8,10 January 2007 Slide3:  CTCZ Brief Background Slide4:  GPCP Precipitation Climatology MAY JULY Slide5:  MAY (HOT & DRY) JULY (WARM & WET) Surface temperature during May & July (AIRS/NASA) Slide6:  Low pressure area Monsoon Though MT ( Heat Low Dynamic Low) Mean SLP & Surface winds during July Axis of maximum rainfall - southward of MT Slide7:  Summer monsoon rainfall over India (June-September) Slide8:  Mean June–September rainfall over the Indian region south of 30 N Monsoon Zone Slide9:  Rain mainly results from the propagation of Monsoon systems (lows & depressions) Monsoon systems form over the surrounding North Indian Ocean & move over land Bay of Bengal Arabian Sea Slide10:  Observations – Rainfall results from Propagation of monsoon systems Models - unable to simulate this propagation in the monsoon zone Monsoon rainfall simulation - Poor CTCZ - ? Can we understand the mechanism of propagation in nature? Better prediction of Monsoon rainfall Slide12:  Major Issues to be Addressed Clouds & Cloud systems Hydrological Feedbacks Aerosols (including along FH of Himalayas) Surface Fluxes Large scale Water & Energy balance Role of Equatorial IO on monsoon Diurnal & Intraseasonal variations Slide13:  Observations include Over land AWSs (~200), Flux towers (~10), DW Radar network (IMD+IAF)~5-10 Aerosol measurements (~10) High resolution GPS radiosondes (5-10) CCN & Cloud Microphysics hydrology 2 Water sheds (Eastern India, Hymalaya foothill) Ocean - 2 to 3 ships buoy network (~90E line, 10S to 20N) Slide14:  Over land AWSs (~25-50), SRGs ~100 Flux towers (~5) DW Radar network ~3-4 Aerosol measurements (~10) High resolution radiosondes (3-4) CCN & Cloud Microphysics hydrology 1 Water shed (Hymalaya foothill) Ocean - 1 ship buoy network (~90E line) 2008 - Pilot Slide15:  STORM Programe March – May (Pre-monsoon) Severe Thunderstorms & Tornadoes NW-SE traveling systems Severe Thunderstorms – Observations & Regional Modeling Slide16:  Occurrence of Severe thunderstorms over India Very frequent over Northeast India Cloud top exceeds 65000 feet! Slide17:  Monthly Thunderstorm Occurrence Peak: April-May STORM: March-May Slide18:  Radiosonde network Mesoscale Synoptic grid AWSs ~ 40 Flux towers - 3 Cloud Electrical characteristics & Lightning detectors ~ 10 locations DWRs - 2 PILOT: 2006 Main : 2007-08 Study Area Slide19:  Megha-Tropiques: Satellite focusing on Tropical Clouds & Water Indo-French Collaboration Low inclination satellite (~TRMM) Launch year – 2009 Payloads: MADRAS (Microwave Analysis and Detection of Rain & Atmospheric Structures) SAPHIRE: Microwave Humidity sounder & Radiometer SCARAB: Slide20:  Indian Monsoon - Planetary Scale Circulation Strong links with east Asia & west Pacific MAHASRI Region very critical Slide21:  Weather knows no national boundaries India is very keen to collaborate with other Asian countries in monsoon research CTCZ & STORM: India’s contribution to MAHASRI Some data in 2008 but more extensive in 2009 Slide22:  Celebrating the Monsoon, July 24-28 2007 Indian Institute of Science Bangalore http://caos.iisc.ernet.in

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