Physical, chemical, biological and geological differences of bay of bengal with other oceans Physical, chemical, biological and geological differences of bay of bengal with other oceans Physical, chemical, biological and geological differences of bay of bengal with other oceans

1. PHYSICAL, CHEMICAL,
BIOLOGICAL AND GEOLOGICAL
DIFFERENCES OF BAY OF BENGAL WITH OTHER
OCEANS
PRESENTATION ON

2. PREPARED BY
SHEIKH FAHIM FAYSAL SOWRAV
SFFSOWRAV@TEACHERS.ORG

3. PHYSICAL PROPERTIES
Topic Bay of Bengal Arabian Sea Other Oceans Arctic / Southern
Ocean
Temperatu
re
22°C - 31°C 24°C -
28°C
75% of the water
in the oceans
has
temperatures
ranging between
0° and 6°C; the
average
temperature is
3.5°C
Even in the
southern summer,
the average
temperature is -
17.5°F (-27.5°C)
Salinity Salinity near the
surface in the
northern Bay of
Bengal can be as
low as 31 ppt.
37 – 40 ppt 75% of seawater
has a salinity
ranging between
34-35 ppt.
2.7 – 33.2 ppt

4. MIXED LAYER
BAY OF BENGAL
12 14 16 18 20 22 24 26 28 30
Temperature (oC)
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Depth
(m)
34 34.2 34.4 34.6 34.8 35 35.2
Salinity (PSU)
Isothermal Layer
Mixed layer depth
Barrier layer
Isothermal Layer
12 14 16 18 20 22 24 26 28 30
Temperature
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Depth
(m)
33 33.5 34 34.5 35 35.5
Salinity(PSU)
Mixed layer depth
commonly
observed in other
oceans

5. DENSITY AND OTHER VERTICAL PROFILES

6. CHEMICAL AND BIOLOGICAL PROPERTIES
Bay of Bengal Other Oceans
Amount of
Nutrients
Higher
concentration
High in Arabian sea
but not in other
oceans
Amount of
planktons
High rate of
phytoplanktons and
zooplanktons
Average is lower
than BoB
Primary production Higher in photic
zone
High in photic zone
where
phytoplankton is

7. LIGHT PENETRATION
50
40
30
20
10
0
De
pth
(m)
Light

8. SUBSURFACE CHLOROPHYLL MAXIMUM (SCM)

9. GEOLOGICAL PROPERTIES
 INDIAN OCEAN HAS TWO MEGA SHEARS BECAUSE OF
THE INDIAN SUBCONTINENT MOVEMENT. NO OTHER
OCEAN HAS THESE KIND OF MEGA SHEARS.
 TWO MEGA SHEARS ARE-
• 90 ° EAST MEGASHEAR
• CHAGOS LACCADIV MEGASHEAR

10. Thank You