CHAPTER IV Results & Discussion
4.1.3 Distribution of Observed and Simulated temperature in May 2010-2013
37
Rangpur is 26.37oC. In this month, Dhaka has also observed maximum temperature of 29.01oC.
The simulated 107 days average temperature in April 2013 is found maximum in the western region of the country (Fig.4.1.4d). The average temperature is found maximum at Rajshahi, Ishurdi, Chuadanga and Jessore regions and its highest value is 31.21oC in Chuadanga. The simulated monthly average temperature is found minimum in the south-southeastern region of the country and its values are 24.04 and 24.3oC at Sundarban and Cox’s Bazar regions respectively. The simulated monthly average temperature increases from northeastern and southeastern region towards western region. From Figs. 4.1.4(b & d), the monthly average observed temperature in April 2013 is found maximum in the southwestern region and the simulated temperature is found maximum in the western region. The observed and simulated temperatures are seen minimum in the northeastern and south-southeastern regions respectively. The difference between average observed and simulated temperature is also significant in the south-southeastern region of the country.
38
and the simulated temperature is maximum in the western region. The observed and simulated temperatures are found minimum in the northeastern and south-southeastern regions respectively. The difference between average observed and simulated temperatures is 5-6oC and is also significant in the south-southeastern region of the country.
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
Fig. 4.1.5: Distribution of (a-b) observed and (c-d) simulated temperature in May 2010 and 2011 respectively over Bangladesh
The average observed temperature in May 2011 has been found maximum (Fig. 4.1.5b) in the south-southwestern region of the country. The temperature is found maximum at Jessore, Khulna, Mongla and Khepupara region and its maximum value is 29.89oC at Mongla. The average observed temperature is found minimum in the northeastern region of Bangladesh
(a) Observed May 2010
(b) Observed May 2011
(c) Simulated May 2010
(d) Simulated May 2011
39
and its value is 26.88oC at Sylhet. The average observed temperature is found to increase from northeastern region to southwestern region of the country.
The simulated 107 days average temperature in May 2011 has maximum in the western region of the country (Fig.4.1.5d). The average temperature is found maximum at Rajshahi, Ishurdi, Chuadanga and Jessore regions and its highest value is 31.09oC at Chuadanga. The simulated monthly average temperature is found minimum in the south-southeastern region of the country and its value is 24.62 and 25.19oC at Sundarban and Cox’s Bazar regions respectively. The monthly simulated average temperature has increased from northeastern and southeastern region towards western region. From Figs. 4.1.5(b & d), the monthly average observed temperature in May 2011 is found maximum in the southwestern regions and the simulated temperature is found maximum in the western region. The observed and simulated temperatures have been found minimum in the northeastern and south-southeastern region of the country respectively. The difference between average observed and simulated temperatures is 2-3oC in the south-southeastern region of the country.
The average observed temperature in May 2012 is found maximum (Fig. 4.1.6a) in the west and southwestern region of the country i.e. Rajshahi, Ishurdi, Chuadanga, Jessore, Khulna and Mongla regions and its value is 31.39oC at Rajshahi. The northeastern region of the country has observed average temperature minimum and its value is 27.84oC at Sylhet. The average observed temperature is found to increase from northeastern region to the west- southwest and southwestern region of the country.
The simulated 107 days average temperature in May 2012 has maximum in the western region of the country (Fig.4.1.6c). The average temperature is found maximum at Dinajpur, Rajshahi and Chuadanga regions and its highest value is 32.01oC at Rajshahi. The simulated monthly average temperature has minimum value in the south-southeastern region of the country and its values are 23.31 and 25.19oC at Sundarban and Cox’s Bazar regions respectively. The monthly simulated average temperature has increased from northeastern and southeastern region towards western region. In Figs. 4.1.6(a & c), the monthly average observed temperature in May 2012 is found maximum in the southwestern regions and the simulated temperature is found maximum in the west northwestern region. The observed and simulated temperature is seen minimum in the northeastern and south-southeastern region respectively of the country. The average observed and simulated temperature difference is 3- 4oC in the south southeastern region of the country.
40
The average observed temperature in May 2013 is found to increase (Fig. 4.1.6b) in the south-southwestern region. The northeastern region of Bangladesh has minimum monthly average temperature in May and its value is 25.94oC at Sylhet. The observed maximum temperature is found to increase at Rajshahi, Jessore, Khulna, Mongla and Khepupara regions and its value is 29.01oC at Jessore. The average observed temperature in May is found to increase from northeastern region to west-southwestern region in Bangladesh.
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
88 E 89 E 90 E 91 E 92 E
21 N 22 N 23 N 24 N 25 N 26 N
BarisalBhola Bogra
Chandpur Chuadanga
Comilla Dhaka Dinajpur
Faridpur
Feni Hatiya Ishurdi
Jessore Madaripur M.Court Mymensingh Rajshahi
Satkhira
Sitakunda Srimangal Sylhet
Tangail
Teknaf Rangpur
Khulna Mongla
Khepupara Patuakhali
Chittagong
Cox's Bazar Kutubdia
Rangamati Sandwip
Fig. 4.1.6: Distribution of (a-b) observed and (c-d) simulated temperature in May 2012 and 2013 respectively over Bangladesh
The simulated 107 days average temperature in May 2013 is found maximum in the west- northwestern region of the country (Fig.4.1.6d). The average temperature is found maximum
(b) Observed May 2013 (a) Observed
May 2012
(d) Simulated May 2013 (c) Simulated May 2012
41
at Dinajpur, Rajshahi and Chuadanga regions and its highest value is 30.75oC at Rajshahi.
The simulated monthly average temperature is found minimum in the south-southeastern region of the country and its values are 24.16 and 24.58oC at Sundarban and Kutubdia regions respectively. The monthly simulated average temperature has increased from northeastern and southeastern region towards west-northwestern region. In Figs. 4.1.6(b & d), the monthly average observed temperature in May 2013 is found maximum in the southwestern region and the simulated temperature is found maximum in the west- northwestern region. The observed and simulated temperatures are found minimum in the northeastern and south-southeastern regions respectively. The average observed and simulated temperature difference is 2-3oC in the south southeastern region of the country.