Analysis of extreme events in a few selected stations in Bangladesh using RClimDex

Ahsan Uddin Ahmed, Md. Nazrul Islam1 and Anwar Ali

Bangladesh Unnayan Parishad, Niketon, Gulshan-1, Dhaka-1212, Bangladesh

1Department of Physics, Bangladesh University of Engineering & Technology, Dhaka-1000

Regional Workshop on Climate Extreme Indices and Indicators for Monitoring Trends in South Asia, 02-06 January 2006, Islamabad, Pakistan

30N

20N

10N

EQ60E 70E 80E 90E 100E

GeoFea

INDIA

BAY OF BENGAL

MY

AN

MA

R

TIBETAN PLATEAU

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IAIN

DIA

1997 19988 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

No Significant break point found

Tmin MinSeg=5

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

8 8 8 9 9 0 9 1 9 2 9 3

Longitude (E )

8 8 8 9 9 0 9 1 9 2 9 3

2 1

2 2

2 3

2 4

2 5

2 6

La

titu

de

(N

)

2 1

2 2

2 3

2 4

2 5

2 6

Barisa lBhola

Bogra

C handpur

C hittagong(AP)

C om illa

C ox's Bazar

D haka

D inajpur

Faridpur

Ishurd i (AP)

Jessore(AP)

Khepupara

Khulna

Kutubdia

M . C ourt

M adaripur

M ym ensingh

Patuakhali

R ajshahi

R angam ati

R angpur

Sandw ipSatkh ira S itakunda

Srim ongal

Sylhet

Tangail

TeknafBAY O F BEN G AL

IN D IA

IN D IA

IND

IA

1987

1984

-800

-600

-400

-200

0

200

400

600

800

1950

1952

1954

1956

1958

1960

1962

1964

1966

1968

1970

1972

1974

1976

1978

1980

1982

1984

1986

1988

1990

1992

1994

1996

1998

2000

Year

Annual r

ain

fall

anom

ally

(m

m)

Flood

0

500

1000

1500

2000

250019

71

1973

1975

1977

1979

1981

1983

1985

1987

1989

1991

1993

1995

1997

1999

R95

p (

mm

)

r95pRaj r95pRan r95pCox

2527293133353739414345

19

71

19

73

19

75

19

77

19

79

19

81

19

83

19

85

19

87

19

89

19

91

19

93

19

95

19

97

19

99

TX

x (

C)

apr_Ran apr_Raj apr_Cox

APRIL

02468

1012141618

1971

1973

1975

1977

1979

1981

1983

1985

1987

1989

1991

1993

1995

1997

1999

TN

n (

C)

dec_Ran dec_Raj dec_Cox

DECEMBER

Concluding Remarks

Analyzing 29 years (1971-1999) data for 3 stations over Bangladesh, a few extreme events are detected.

Checking with METADATA may confirm the extreme events.