weather Flashcards
whatre the features of a stevenson screen
-above ground so it isnt influenced by ground temperatures
-sides of box are slanted to allow air to enter freely
-white to reflect away heat
how is data collected in stevenson screens
data is collected automatically with little man input.signals are sent to computer automatically
what does the stevenson screen contain
thermometer
name the instrument and the unit that measures temperature
min-max thermometer in stevenson screen,in celcius
name the instrument and the unit that measures rainfall amounts
rain gauge,in millimeters
name the instrument and the unit that measures air pressure
barograph,in milibars
name the instrument and the unit that measures cloud cover
eyes(look into sky n split in 8th),oktas
name the instrument and the unit that measures wind speed
anemometer,in knots
name the instrument and the unit that measures visibillity
eyes (geologists), in kilometers
name the instrument and the unit that measures wind direction
wind vane in compas points
whatre clouds made of
tiny water dropplets or ice crystals that settle onto dust particles in the atmosphere
name the clouds made of ice crysyals and look like long thin white horse tails (CH)
cirrus clouds
name the long artificial clouds that form behind aircrafts (CH)
contrails
name the dark and grey layers of clouds that are thick enough to block out sun (CM)
nimbostratus
name the CL cloud thats low and grey in colour which looks like fog
stratus
name the CL cloud thats associated with thunderstorms and grows vertically
cumulonimbus
name the CL cloud thats white and fluffy with a sharp outline thats associated with fair weather
cumulus
where should weather stations be located (4)
-in fenced areas to avoid disruption and vandalism
-in open space to prevent shadeing from trees/buildings
-in flat land on grass to measure accurately
-high points to avoid wind blockage
describe the impacts of tropical storms on people living in coastal communities (4)
-damaged homes and buildings which lead to homelessness
-damaged workplaces which lead to less income and workplace disruption
-contaminated water pipes which could lead to disease
-deaths
-need to evacuate
explain how info about relative humidity can be collected for a periiod of 1 month (5)
- use a digital hygrometer
-Check every day/daily;
-Check at the same time (each day);
-Read temperatures on wet and dry bulb;
-Work out difference between wet and dry bulb temp./depression of wet bulb;
-Use (relative humidity) table;
-Read off figure displayed/statistics from data logger (if digital hygrometer)
