WHAT IS HUMIDITY?
CHRISTOPHER NEIL TAGNIPIS
HUMIDITY IS A MEASURE OF THE
AMOUNT OF WATER VAPOR IN THE AIR.
RELATIVE HUMIDITY MEASURES THE
AMOUNT OF WATER IN THE AIR IN
RELATION TO THE MAXIMUM AMOUNT
OF WATER VAPOR (MOISTURE). THE
HIGHER THE TEMPERATURE, THE MORE
WATER VAPOR THE AIR CAN HOLD.
TYPES OF HUMIDITY
ABSOLUTE HUMIDITY
ABSOLUTE HUMIDITY IS THE MASS OF WATER VAPOR
PRESENT IN A CERTAIN AMOUNT OF AIR BEFORE IT CAN
CONDENSE. IT IS NECESSARY TO NOTE THE TEMPERATURE
CONDITION OF ABSOLUTE HUMIDITY: THE WARM AIR MASS
HAS A HIGHER CAPACITY TO STORE WATER VAPOR THAN THE
COLD AIR MASS.
MATHEMATICALLY, ABSOLUTE HUMIDITY IS DEFINED AS THE
MASS OF THE WATER VAPOUR DIVIDED BY THE VOLUME OF
THE AIR AND WATER MIXTURE, WHICH IS EXPRESSED AS
∆H = MH20/VNET
WHERE MH20 = MASS OF THE WATER VAPOUR
VNET = VOLUME OF AIR AND WATER MIXTURE
THE ABSOLUTE HUMIDITY VARIES WITH RESPECT TO AIR
TEMPERATURE, AND PRESSURE CHANGES IF THE VOLUME IS
NOT FIXED. THE MASS OF WATER VAPOUR PER UNIT VOLUME
IN THE EQUATION IS ALSO DEFINED AS VOLUMETRIC
HUMIDITY.
RELATIVE HUMIDITY IS THE CAPACITY OF AIR TO STORE WATER, WHICH
DEPENDS ON THE SATURATION POINT (THE EXTENT TO WHICH THAT AIR HOLDS
WATER), AND A CERTAIN TEMPERATURE. IT IS THE MOST WIDELY USED MEASURE
OF HUMIDITY. AT A GIVEN TEMPERATURE, AIR CAN HOLD ONLY A CERTAIN
AMOUNT OF WATER VAPOR, AND IN THIS STATE, THE AIR IS SATURATED. IF THE
TEMPERATURE IS RAISED FURTHER, MORE WATER VAPOR WILL BE REQUIRED TO
SATURATE THE AIR. THE HIGHER THE TEMPERATURE IN AN AIR MASS, THE
HIGHER THE TEMPERATURE IT CAN HOLD.
YOU CAN CALCULATE THE RELATIVE HUMIDITY BY THE RATIO BETWEEN THE
AMOUNT OF VAPOR PRESENT IN THE ATMOSPHERE BY THE MAXIMUM VOLUME IT
CAN CONTAIN, MULTIPLIED BY ONE HUNDRED (AND THE RESULT EXPRESSED AS
A PERCENTAGE).
RELATIVE HUMIDITY OF 100% INDICATES THAT IT HAS REACHED ITS SATURATION
LIMIT POINT AND FROM THERE, ANY EXCESS WATER VAPOR CONDENSES.
THE RELATIVE HUMIDITY
RELATIVE HUMIDITY IS THE CAPACITY OF AIR TO STORE WATER, WHICH DEPENDS ON
THE SATURATION POINT (THE EXTENT TO WHICH THAT AIR HOLDS WATER), AND A
CERTAIN TEMPERATURE. IT IS THE MOST WIDELY USED MEASURE OF HUMIDITY. AT A
GIVEN TEMPERATURE, AIR CAN HOLD ONLY A CERTAIN AMOUNT OF WATER VAPOR,
AND IN THIS STATE, THE AIR IS SATURATED. IF THE TEMPERATURE IS RAISED FURTHER,
MORE WATER VAPOR WILL BE REQUIRED TO SATURATE THE AIR. THE HIGHER THE
TEMPERATURE IN AN AIR MASS, THE HIGHER THE TEMPERATURE IT CAN HOLD.
YOU CAN CALCULATE THE RELATIVE HUMIDITY BY THE RATIO BETWEEN THE
AMOUNT OF VAPOR PRESENT IN THE ATMOSPHERE BY THE MAXIMUM VOLUME IT CAN
CONTAIN, MULTIPLIED BY ONE HUNDRED (AND THE RESULT EXPRESSED AS A
PERCENTAGE).
RELATIVE HUMIDITY OF 100% INDICATES THAT IT HAS REACHED ITS SATURATION
LIMIT POINT AND FROM THERE, ANY EXCESS WATER VAPOR CONDENSES.
SPECIFIC HUMIDITY
THERE IS ALSO ANOTHER, ONE MORE WAY OF EXPRESSING HUMILITY. THE MASS
OF WATER VAPOR PER UNIT MASS OF AIR IS KNOWN AS SPECIFIC HUMIDITY.
THE DIFFERENCE BETWEEN RELATIVE AND
ABSOLUTE HUMIDITY
THE RELATIVE HUMIDITY ABSOLUTE HUMIDITY
CORRESPONDS TO THE CORRESPONDS TO THE
PERCENTAGE MEASUREMENT OF THE
MEASUREMENT (THE AMOUNT OF WATER IN A
PERCENTAGE OF WATER CERTAIN WEIGHT OF THE
WHICH AIR CAN STORE). IT AIR. ITS UNIT IS IN GRAMS
HAS NO UNIT. OR KILOGRAMS.
HUMIDITY: GEOGRAPHIC
IMPORTANCE IN THE PH
CHERRY PIE TAMALA
TEMPERATURE
• MEAN ANNUAL TEMPERATURE
IS 26.6O C
• COOLEST MONTH: JANUARY -
MEAN TEMPERATURE 25.5OC
• WARMEST MONTH: MAY -
MEAN TEMPERATURE 28.3OC
THE ANNUAL TEMPERATURE APPLIES TO ALL LOCATION OF THE COUNTRY,
EXCEPT?
THE ANNUAL TEMPERATURE APPLIES TO ALL LOCATION OF THE COUNTRY,
EXCEPT?
BAGUIO CITY
THE ANNUAL TEMPERATURE APPLIES TO ALL LOCATION OF THE COUNTRY,
EXCEPT?
BAGUIO CITY
• THE ANNUAL TEMPERATURE OF THE COUNTRY DOESN’T APPLY TO BAGUIO DUE
TO ITS ALTITUDE
• WITH ELEVATION OF 1,500M – ANNUAL TEMPERATURE 18.3OC
HUMIDITY
MOISTURE CONTENT OF
THE ATMOSPHERE
PHILIPPINES HAS A HIGH
RELATIVE HUMIDITY.
CLIMATE MAP OF
THE PHILIPPINES
(1951-2010)
