DRRR lesson 1 Flashcards
Meteorological hazards
Major types of tropical cyclone:
61 km/h or less
WIND SIGNAL NUMBER 1:
Tropical Depression (TD)
Major types of tropical cyclone:
62-88 km/h
WIND SIGNAL NUMBER 2:
Tropical Storm (ST)
Major types of tropical cyclone:
89-117 km/h
WIND SIGNAL NUMBER 3:
Sever Tropical Storm (STS)
Major types of tropical cyclone:
118-220 km/h
WIND SIGNAL NUMBER 4:
Typhoon (TY)
Major types of tropical cyclone:
220 km/h or higher
WIND SIGNAL NUMBER 5:
Super Typhoon (STY)
Typhoon are build from
1.) Strong Winds
2.) Heavy Rains
3.) Central low pressure area
Are processes or phenomena of atmospheric, hydrological, or oceonographic nature
Hydrometeorological Hazards
May cause of loss of life, injury or other health impacts, property damages, loss of livelihoods, and services, social and economic disruptions, or even environmental damages.
Hazards
A powerful spinning storm that contains strong winds and rains.
An intense low pressure system which is characterized by strong spiral winds towards the center, called “eye” in a COUNTER CLOCKWISE flow
CYCLONE
Counter clockwise flow in the NORTHERN HEMISPHERE
CYCLONE
A large, powerful and violent tropical cyclone.
It is a low pressure area rotation counter clockwise and containing rising warm air that forms in the WESTERN PACIFIC OCEAN.
TYPHOON
INGRIDIENTS IN TROPICAL CYCLONE
FORMATION
1.) Deep ocean water
2.) Warm sea temperature
3.) Coriolis force
Water evaporates from the ocean surface and comes in contact with mass of cold air, forming clouds
Deep ocean water
A column of low pressure develops at the center. Winds form around the column
Warm sea temperature
A pressure in the central column (the EYE) weakens, the speed around it increases.
Coriolosis Force
WHY DO TROPICAL CYCLONES FORM?
REDISTRIBUTION OF HEAT through wind from the equatorial regions to polar regions.
Localized unusual of sea water level beyond the predicted astronomical tide levels
Storm surge
A weather condition that produces lightning and thunder, heavy rainfall, from COMULONIMBUS CLOUDS and possibly a tornato
Thunderstorm
Formed when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere and freeze.
Hail storm
A violently rotating column of air touching the ground, usually attached to the base of a thunderstorm.
Tornado
Is the inundation of land areas where are not normally covered by water.
Normally caused by temporary rise or over flowing of a river, streath, water course, etc.
Flood
FLOOD TYPES
- Riverine
- Estuarine and Coastal
- Urban flooding
- Catastrophic
- Flash flood
Increase in river water levels
Extreme and sustained rainfall
Riverine
Storm surges
Unusually High Tides
Estuarine and Coastal
Large area of impermeable surfaces
Man-made causes
Urban flooding
Ground failure, Liquefaction, Landslide that may triggered by natural disasters
Breakage of Dams
Catastrophic
ENSO
El Nino Southern Oscillation
Cyclic fluctuation of warm and and cold sea surface temperatures and atmospheric pressure in the central and eastern equatorial pacific.
ENSO
Causes extreme regional-scale Weather and Climate pattern changes
ENSO
EL NINO MEANS?
Little boy
La NINA MEANS?
Little girl
Most powerful climatic force on earth
El Nino and La Nina
Warm phase of climate where hair is evidence to everyone
El Nino
Cold phase that can affect the ground for a very long time.
La Nina
Last for 9 months to 2 years starts between DECEMBER to FEBRUARY
occurs every 2-9 years
El Nino
Lasts 1 to 3 years
La Nina
Clockwise rotation
Southern Hemisphere
Counter Clockwise rotation
Northern Hemisphere
Short term
Typhoon
Coastal and Riverbank erosion
flood
Thunderstorm
Storm surges
Long term
El nino
La nina
Enso cycle
