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SAARC STORM A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region SAARC Someshwar Das* SAARC Meteorological Research Centre, Dhaka, Bangladesh *Permanent Affiliation:

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slide1

SAARC STORM

A Coordinated Field Experiment on Severe Thunderstorm Observations and Regional Modeling over the SAARC Region

SAARC

Someshwar Das*

SAARC Meteorological Research Centre,

Dhaka, Bangladesh

*Permanent Affiliation:

National Centre for Medium Range Weather Forecasting, NOIDA-Delhi, India

south asian association for regional cooperation saarc saarc meteorological research centre smrc

South Asian Association for Regional Cooperation (SAARC)SAARC Meteorological Research Centre (SMRC)

Dhaka, Bangladesh

SMRC

outline
OUTLINE

Part - 1

SAARC

  • Introduction
  • Thunderstorm Climatology
  • STORM Programme
  • Summary of pilot experiments 2006, 2007 & 2009
  • Coordinated Field Experiment over E & NE India, Bangladesh, Nepal & Bhutan

Part - 2

  • Weather Hazards & Their Mitigation in the SAARC countries
socio economic impact of severe thunderstorm kal baisaki
Socio-Economic Impact of Severe Thunderstorm (Kal Baisaki)
  • Severity of NORWESTERS: next to Tropical Cyclones
  • Average frequency of occurrence:

Kalbaisaki is 28 (±5) in pre-monsoon period

Tropical Cyclones (2) (±1)

  • Hail Storms and Squall Winds:

Loss of human life and animals;

Extensive damage to standing crops and property

  • Highest lightning-associated casualty in the world.
  • Highest frequency of hail storms in the world.
  • Frequency of occurrence is second highest to that in the central regions of United States.
  • May lead to flash floods
  • Major aviation hazard; with several reported air plane accidents.
  • Most Tornadoes in the country are associated with Kal Baisaki
typical damages by a severe thunderstorm 22nd april 2003 dhubri assam
Typical damages by a Severe Thunderstorm:22nd April 2003, Dhubri,Assam.
  • Number of affected Villages :6
  • Population Affected : 4900
  • No. of human lives lost : 35
  • No. of persons with serious injuries : 150
  • No. of persons with minor injuries : 1350
  • No. of cattle head lost : 517
  • No. of poultry lost : 1340
  • No. of houses fully damaged : 1350
  • No of houses partially damaged : 650
  • Total estimated damage :Rs. 2.00 Crore

*National Disaster Management Cell (MHA, Govt. of India)

slide11

SAARC

Monthly distribution of Hail storms in India

Diurnal variation of Hail storms in India

slide13

What is STORM Programme?

SAARC

A Comprehensive Observational and Modeling study on genesis, evolution and life cycle ofintense tropical convective Storms

storm objectives
STORM-Objectives

SAARC

  • To understand: genesis, development and propagation of severe thunderstorms
  • To enhance the knowledge: Dynamical and thermodynamical structure role of microphysical processes for intensification
  • To study behavior of atmospheric electrification during intensification process and interaction with cloud microphysical processes
  • Development of meso-scale prediction system with improved forecast skill
slide16

Pilot Experiment (20N-27N, 86-90E), 2006

Scale Environment of STORM

Synoptic Scale Environment and mesoscale;

SAARC

slide17

Guwahati

SAARC

Patna

Murshidabad

Asnsol

Ranchi

Kolkata

Digha

Bhubaneswar

Outer and Inner Meso - Net Quadrangles

slide19

Map depicting Outer and Inner Meso-Net Quadrangles

SAARC

North-Eastern Sector

Eastern Sector

slide20

SAARC

List of installed locations of AWS in the NER as on 24th February 2007

slide21

SAARC STORM Programme

Phase-1: Nor’westers

Participating countries:

India, Bangladesh, Nepal & Bhutan

coordinated joint field experiment
Coordinated Joint Field Experiment

Bangladesh:

Surface obs: 35

Pilot Balloon: 10

RS/ RW : 3

DWR : 3

Bhutan:

Surface (Class-1): 21

AWS :

India

Surface obs: 559

Pilot Balloon: 62

RS/ RW : 39

DWR : 5

Nepal

Surface (Class-1): 27

AWS : 15

Moh

Gua

Pat

Mol

Dha

Aga

Ran

Kol

Khe

Cox

Pilot Field Experiment conducted during 1-31 May 2009

slide23

ISRO (India) will provide

50 AWS 3 GPS Sondes 1 Doppler Radar

SAARC

To be installed

24 AWS & 1 GPS Sonde in Bangladesh

16 AWS, 1 GPS Sonde and 1 Doppler Radar in Nepal

10 AWS & 1 GPS Sonde in Bhutan

To fill up the Data gap regions during the main Expts.

The AWS will be fitted with Satellite telemetry systems

slide24

SAARC STORM: ROAD MAP

SAARC

International Programme Committee (IPC)

Phase-1:2009-2011

Nor’westers

India, Bangladesh, Nepal, Bhutan

Phase-2: 2011-2013

Deep, Moist & Dry Storms

India, Pakistan, Afghanistan

Phase-3: 2013-2015

Maritime & Continental Storms

India, Sri Lanka, Maldives

Seven Working Groups

Field Experiment

& Implementation

Weather Advisory &

Program Management

Capacity Building

& Coordination

Database Management

Cloud Microphysics &

Atmospheric Electricity

Mesoscale Data

Assimilation & Modeling

Observational Analysis

& Parameterization of

Physical Processes

part 2
Part – 2

SAARC

Weather Hazards & Their Mitigation: Focus of South Asian Countries

weather hazards their mitigation in the saarc countries
Weather Hazards & Their Mitigation in the SAARC countries

** SAARC Disaster Management Centre, New Delhi, India

weather hazards their mitigation in the saarc countries27
Weather Hazards & Their Mitigation in the SAARC countries

** SAARC Disaster Management Centre, New Delhi, India

radar network
Radar Network

Bhuj

D

D

D

D

(C or X)

Kochi

S-Band: 2-4 GHz (7-15 cm)

C-Band: 4-8 GHz (4-7 cm)

X-Band: 8-16 GHz (2-4 cm)

D: Doppler Radar

(S band; 2.8 GHz)

slide30

BMD (Dhaka) RADAR Specifications

  • Used BMD S-band radar, wavelength: ~10 cm
  • Coverage 600 km by 600 km
  • Grids points 240 x 240
  • Grids Resolution 2.5 km x 2.5 km, only PPI scan
  • Dhaka radar collects reflectivity data and automatically converted into rain status and stored in six categories: status 1, status 2, status 3, status 4, status 5, status 6