IPCC Projection (AR 4, 2007) The annual mean rainfall exhibits increasing trends in Bangladesh. Decadal rain anomalies are above long term averages since.

IPCC Projection (AR 4, 2007)

• The annual mean rainfall exhibits increasing trends in Bangladesh. Decadal rain anomalies are above long term averages since 1960s.

• Serious and recurring floods have taken place during 2002, 2003, and 2004. Cyclones originating from the Bay of Bengal have been noted to decrease since 1970 but the intensity has increased.

IPCC Projection (AR 4, 2007)

• Salt water from the Bay of Bengal is reported to have penetrated 100 km or more inland along tributary channels during the dry season.

• The precipitation decline and droughts has resulted in the drying up of wetlands and severe degradation of ecosystems.

Summary of Climate Change induced disasters

• Increase of intensity and duration of floods, water logging, flash flood.

• Increase of moisture stress (droughts)• Intensified storm surge, wave heights, erratic

precipitation• Salinity intrusion (100 km inside the country

during dry season)• Slow-onset impacts (salinization, dryness,

ecosystem degradation etc)• Sea Level rise up to 69 cm.

Too much water during monsoon More Floods

F l_ p r o n e .s h pS e v e r e R iv e r F lo o d i n gM o d e r a te R i v e r F l o o d in gL o w R i v e r F l o o d i n gS e v e r e F la s h F l o o d i n gM o d e r a te F l a s h F l o o d in gL o w F la s h F l o o d i n gS e v e r e T i d a l S u r g eM o d e r a te T id a l S u r g eN o t F lo o d P r o n e

Water shortage during dry periodsMore Drought

EXISTING DROUGHT

DROUGHT CLASSES (RABI SEASON)

Very Severe Drought

Severe Drought

Moderate Drought

Less Moderate Drought

Slight Drought

Very Slight to Nil

Severe & Moderate

Moderate & Less Moderate

Sunderbans

Forest

ADDITIONAL DROUGHT PRONE AREAS IN 2030

ADDITIONAL DROUGHT PRONE AREAS IN 2075

PRECIS Simulation at BUET

• Simulated for period of 1961-1990 by Dr. Nazrul Islam, Physics department, BUET

• Calibrated with observed rainfall and temperature data (1961-1990)

• Verification of model using 1991-2007 data

• Future scenarios will be generated.

Mean Rainfall and Temperature (1961-1990)

Rainfall Temperature

8 8 8 9 9 0 9 1 9 22 0 . 6

2 1 . 6

2 2 . 6

2 3 . 6

2 4 . 6

2 5 . 6

2 6 . 6

LO NGI T UDE (E)

LAT

ITU

DE

(N)

PR EC IS R ain fa ll JJAS 1961-90

m m /d

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

12.5

13

13.5

14

14.5

15

15.5

16

8 8 8 9 9 0 9 1 9 22 0 . 6

2 1 . 6

2 2 . 6

2 3 . 6

2 4 . 6

2 5 . 6

2 6 . 6

LO NGI T UDE (E)

LAT

ITU

DE

(N)

O bserved R ainfa ll JJAS 1961-90

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

m m /d

MODEL OBSERVATION

Comparison of results (1961-1990)

Monthly Temperature (1960-1990)

0

5

10

15

20

25

30

35

Jan

Feb

Mar

Apr

May Ju

n

Jul

Aug

Sep Oct

Nov

Dec

Tem

pera

ture

(C

)

Obs Temp_1961-1990

blsula Temp_1961-1990

Plan of using PRECIS

Component 1: knowledge Center – Creating knowledge base and database of climate

change scenarios in regional scale. – Understanding and interpretation of model results.

Building awareness of the people for future climate induced risks.

– House of various climate models and outputs.– Training of Trainers (TOT) for building capacity of the

organization through organizing regional and local workshops and seminars.

Plan of using PRECIS

• Component-2: Research

– Use of PRECIS results for Agriculture, Fisheries and other sectors.

– Forecasting of disasters such as flood and cyclone

– Coupling of hydrological and climate models

In 2008, Bangladesh University and Engineering Technology (BUET) has

establish a Climate Change Study Cell

The vision of the Climate The vision of the Climate Change Study Cell is to Change Study Cell is to establish itself as the establish itself as the premier knowledge center premier knowledge center on climate change risk and on climate change risk and adaptation for Bangladesh.adaptation for Bangladesh.

Mission of the cell To improve knowledge about climate change and

associated risk to Bangladesh;

To increase awareness of the planners, policy makers about the effects of climate change;

To become institutional home for climate modeling and predicting future scenarios;

To strengthen capacity of professionals in climate change modeling; and

To share knowledge and expertise with other organizations.

Activities

Following list of activities has been proposed for this cell. Research Short coursesWorkshopSeminarAdvisory ServicesConferencePublications of JournalsClimate change Database Dissemination of information through web

Thank you!

http://teacher.buet.ac.bd/diriwfm/climate/