The document discusses the climate and weather of Bangladesh. It defines weather as the short-term atmospheric conditions of an area, while climate refers to the average weather over a long period of time, usually 30-40 years. Bangladesh has a tropical climate due to its location. It experiences six seasons including a hot summer and rainy monsoon season which brings 70-85% of the annual rainfall. The climate is being impacted by factors like increasing greenhouse gases from human activities such as deforestation, fossil fuel burning, and industry, which are enhancing the greenhouse effect and causing global warming. This is leading to effects in Bangladesh like rising temperatures, more frequent natural disasters, and sea level rise.

6. Chapter Seven
Climate of Bangladesh
Md. Asaduzzaman Sarker
Lecturer in Geography
Sylhet Cadet College

7. First of all, you should know that
weather and climate are not the same
thing.

8. Weather
The State of the atmosphere/ Atmospheric condition at a
particular time and place is called Weather.
Weather is described in terms of variable conditions such as
temperature, humidity, wind velocity, precipitation and pressure.
The average weather conditions of a region over time are used to
define as a regions climate.

9. WEATHER IS:
• Short term
• Limited area
• Can change rapidly
• Difficult to predict WEATHER is what’s
happening outside your
window right now.

10. Climate
Climate is the average state of the atmosphere
near the earths surface over a long span of time
(30-40 years).
The climate can be best understood by an analysis
of its component or elements.

11. CLIMATE is the average
of many years of
weather observation.
CLIMATE IS:
• Long term
• Wide area
• Seasonal changes
• Measured over long
spans of time

12. Weather vs. Climate

13. Climate of Bangladesh
The climate of Bangladesh is moderate, at the same time its
favorable and adverse.
Bangladesh is evergreen and fertile, on the other hand, different
types of natural disaster occurs here throughout the year.
Like; storms, tidal wave, flood, drought, nor’wester, tornado and
excessive rainfall.

14. Location of Bangladesh

15. Climate

16. Seasonal Variation
Season Is the climate type, at any place, associate with a
particular time of the year.
The change of the season is mainly due to the change in angle of
the earths axis in relation to the position of the sun at a
particular place.

17. Season’s of Bangladesh
Bangladesh is called the land of six seasons. It has a tropical
climate because of its physical location. The Bangla calendar year
is traditionally divided into six seasons-

18. Season’s of Bangladesh

19. Summer season in Bangladesh
The characteristics of summer season:
-The summer is warm,
-Start from the month of Baisakh, from mid-april.
-Highest temperature is 34ºc & average lowest 29ºc.
-Temperature in north & north west area rises up to 40-45ºc
-Norwester, cyclone and tsunami occurs in this time.

20. The summer season

21. The Rainy monsoon season
Characteristics of the rainy monsoon season:
o Wind blows from south & south western part of Bay of Bengal,
this is known as summer monsoon.
o The wind causes heavy rainfall.
o Rainfall does not occur equally all over the country.
o 70 to 85% of total annual rainfall takes place in this season
o April –may and October-November are high time for cyclone
and tornadoes.

22. The Rainy monsoon season

23. The winter season
Characteristics of the cool and dry winter season:
 Low temperature
 Winter is very short & dry
 Generally temperature is 11-29ºc but comes down to 4 -5ºc
in the north and north western region.
 Cold wave and different types of diseases are seen in this season
 The poor people have to suffer a lot.
 Different types of vegetables grow in this season.

24. The cool and dry winter season

25. Causes of climate change

26. Causes of climate change
HUMAN Causes
(anthropogenic or man-made
causes)
Natural causes

27. Anthropogenic or man-made causes
• Greenhouse gases
• Deforestation
• Coal mining
• Burning of fossil fuels
• Industrial processes
• Agriculture

28. Anthropogenic or man-made causes
• The Greenhouse Effect

29. Anthropogenic or man-made causes

30. Increase of Carbon-di-Oxide and
Methane in the atmosphere.
Global
warming
Climate
Change
Raises of temperature
through green house
effect

31. Anthropogenic or man-made causes
• Deforestation

32. Anthropogenic or man-made causes
• Coal Mining

33. Anthropogenic or man-made causes
• Burning of Fossil Fuels

34. Anthropogenic or man-made causes
• Industrial processes

35. EFFECTS OF CLIMATE CHANGE
• RISE IN TEMPERATURE

36. EFFECTS OF CLIMATE CHANGE
• Occurrences of frequent natural disaster

37. EFFECTS OF CLIMATE CHANGE
• Melting of ice caps

38. EFFECTS OF CLIMATE CHANGE
• Sea level rising

39. EFFECTS OF CLIMATE CHANGE
• Salinity intrusion

40. EFFECTS OF CLIMATE CHANGE
• Sudden and excessive rainfall

41. EFFECTS OF CLIMATE CHANGE
• Flood & Flash flood

42. EFFECTS OF CLIMATE CHANGE
• River Bank erosion

43. EFFECTS OF CLIMATE CHANGE
• Extreme drought

44. EFFECTS OF CLIMATE CHANGE

46. Any
Question
???