Climate & Monsoon formation in Bangladesh

Sudipto Ghosh Roll:110447

&

Anusree Biswas Roll:110414

Session: 2011-12

Dept. of Fisheries & Marine Bio Science

Jessore University of Science & Technology

[email protected]

Climate is not weather !

• Climate- the average pattern of weather in a place.

• Weather- is the condition of the atmosphere at a particular place and time measured in terms of such things as wind, temperature, humidity, cloudiness, precipitation, and atmospheric pressure.

How the oceans influence climate

Heat re-distribution (keeps Europe warm)

Monsoons, Cyclones,El Nino

Upwelling can create coastal deserts on land

Great thermal buffer (high heat capacity)

Oceans absorb ~1/3 of anthropogenic CO2

Warm ocean temperature

Counter current of pacific ocean

Spanish word El-Nino means “little boy”

It happens at 3-7 year interval

Lasts for 9 months to 2 years

ENSO Impacts Droughts (e.g. Australia, Africa,

Brazil, Indonesia)

Floods (e.g. Peru, southern

USA)

La -Nino

Anti-El-Nino

cold ocean temperature

Cold current of pacific ocean

Spanish word El-Nino means “little girl”

It happens after El-Nino

Lasts for 2-3 months

• Higher biological productivity

• Cooler than normal seawater

• Stronger upwelling

• Stronger trade winds

• Shallower thermocline

Impacts

Formation of Climate

Climate of polar Region

Climate of Sub-tropical Region

Climate of tropical Region

Lets see Monsoon

Monsoon is derived form the Arabic word

“Mausim” meaning “season”.

It was first used by Arabic navigators

To describe the seasonal winds of the Arabian sea.

• Monsoon is a seasonal wind

• Comes from both Northeast & Southwest region of the world

• This seasonal wind affects the Indian ocean gyre

• Indian ocean is the

only one ocean of the world which gyre is affected by monsoon Northern Hemisphere Summer

Northern Hemisphere Winter

Cool, Dry

Northeasterly

Winds

Moist

Southwesterly

Winds

Indian monsoon

Land warm

Low pressure

cell

Cold air from

Indian ocean gyre

Mixed up hot &

cool air

Formation of monsoon

Monsoon of Bangladesh

Bangladesh

Sudipto Ghosh

Anusree Biswas

&