Part 1 Midterm Flashcards
(sub)tropical cyclone
A generic term for any warm - core low pressure system that develop over tropical and subtropical regions and acquire sufficient organized convection and reaches certain threshold intensities
Wind thresholds for tropical depression: tropical storm: and hurricane/typhoon
25-30kt 35-60 its > 65kts
What type of hurricane are responsible for 50% of all damage
4 and 5
Super typhoon
> 130 knots doubled typhoon threshold intensity
Wind pressure
Non linear and directly proportional to the square of wind speed
At higher hurricane intensities of 3,4, or 5….
Only a sight increasing intensity results insignificantly larger increase in the wind pressure on structures
Tropical cyclones
Low-pressure no fronts form over (sub) tropical oceans organized thunderstorms activity closed surface wind-circulation around well defined center
Atlantic multi - decal oscillation (amo)
Coherent mode of natural variability occurring in the North Atlantic over the last 60-80 years based on average anomalies of sea-surface temps in nab
When does the walker circulation weaken
When water temperature pattern reverses due to el Nino
How is the African easterly mid-level jet produced
Temperature difference between not air over the African Saharan region and cool water over the quit of guinea to the south
When water temp pattern reverse air flow upward over the Epo, causing winds aloft eastward instead of westward
What creates extremely hostile wind shear conditions over the tropical North Atlantic Ocean
Geostationary set advantages
Located along equator at same longitude can see the earth at all times fast image recording
Background flow is created by
Meridional temperature gradient
SATCON limitation
Microwave sounder algorithms are sensitive to Tc core size as compared to the instrument resolution primary member input is ADT microwave sounder performance is best when the Tc eye is best when the Tc eye is sufficiently large compare Fov for resolution
August storms
3-4 increases across basin
What Dvorak is not
Direct measure of any meteorological variable not a replacement for in site measurement not designed for nigh latitude not developed for any basin aside from Atlantic
Highest storm surge
Occurs where winds are blowing on shore and near radius of max winds
What happens to air parcels after reaching the Epo
Sink and produce mid and low level high pressure system
What indicates warm core
Downward sloping isentropes of potential temperature
Downward vertical motion and little cloudiness
Divergence west of trough
Updraft speeds are typically - knots but can reach- knots in the eyewall
10; 60
Which quadrant of a tornado is most favorable
Right front
If earth wasn’t rotating, air in the - of the global Hadley circulation would flow - in the - hemisphere - would flow- in the - hemisphere
Upper levels; flow northward; northern…. Surface air; southward;northern
