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21 Cards in this Set
- Front
- Back
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Warm Core Lows
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Barotropic
Warmest air in center Upper level ridge or closed high cyclonic circulation that weakens with height no fronts circulation aloft may reverse and go cyclonic around high recieve their energy and warmth by intense heating precip and clouds are sysmetrical |
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The three types of warm core lows
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Tropical
Polar Heat |
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Tropical Warm core lows
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found on -N of PFJ
500mb is Weak close low or trough Intense convection wx and heavy precip heated through latent heat of condensation weakens with altitude anticyclonic winds outflow in upper level to remove mass |
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Polar Lows
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+N of PFJI
intense shallow convection or stratiform clouds with occasional intense precip sensible heat and moisture are extracted from relatively warmer ocean latent heat of condenstation/deposition heats center sometimes reaches Tropical strength |
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Heat Lows
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-N of PFJ
500mb ridging intense heating within middle tropics subsidence and clear skies very shallow and not well defined will repostion to warmest sfc land or water mid and upper ridge exists first elevated heating produces afternoon thunderstorms cT regions |
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Cold core lows
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Barotropic
coldest at center no front cloudy skies with stratiform precip minor short waves rotate around may be equatorward or poleward of PFJ cyclonic circulation |
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Isentropes
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motion of parcel for potential temp
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How do you identify systems?
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1. Position of PFJ
2. 500 mb reflection 3. Temp Profile 4. Geographic location |
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Cut-off Low
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-N of PFJ
Spring most prevalent Jet cuts off |
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Name three things that happen to cut off low
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1. remain stationary due to lack of vorticity and advection
2. retreat westward on equatorward side of subtropical high 3. new trough is introduced and provides PVA (called a kicker short wave) |
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Decaying Wave
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+N of PFJ
Last stage of life cycle deep and slow moving in cold pockets |
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Two types of Cold Core Lows
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Cut-Off low
Decaying wave |
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Warm Core Barotropic Highs
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Subtropical
Cut-off Cold SFC warm core |
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Subtropical high
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-N of PFJ
convergence of Hadley and Ferrell cells Near 30N 500 mb closed high with broad ridge |
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Cut-off highs
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blocking highs
ridge forms ahd of major mid-lat cyclone |
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Two blocking regimes
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Omega
Rex |
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Cold SFC Warm High
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Plateu high
special case pollution in air is stagnant Flat snow covered high cP and cA region subsidence aloft same area for long times highter elevation 500mb trough no front +N of PFJ |
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What is a Polar High?
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Cold core high
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Cold Core Highs
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troughing exists in low levels
anticyclonic circulation weakens with height stronger in low levels ma become cyclonic in upper levels no fronts +N of PFJ |
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Baroclinic Lows
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out of phase
stack back stacks toward cold air -Z of PFJ 500mb reflect 3-9 degree from sfc system more vertical over time |
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Baroclinic Highs
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axis tilts back toward warm air
+Z of PFJ system is a result of a disturbance in the mid lat west flow forms downstream form long wave trough and moves NE |
