Post on 06-Jan-2016
description
Oceanic Influences on Climate
Oceanic Influences on Climate
Ocean currents redistribute heat
Large scale currents are called gyres
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North Atlantic Gyre
Includes the Gulf Stream
North Atlantic Gyre
Includes the Gulf Stream
SST in Gulf Stream- July
Influence of Gulf stream SST on air temp
Walker cell circulation
Walker cell circulation
El Nino and La Nina years since 1950.
El Nino years produce weird weather in North America
La Nina years are more “normal”
El Nino and La Nina years since 1950.
El Nino years produce weird weather in North America
La Nina years are more “normal”
Prevailing wind flow along the ITCZ pushes warm water eastward
Position of ITCZ shifts North with Northern Hemisphere summer and south with the Southern Hemisphere summer
Prevailing wind flow along the ITCZ pushes warm water eastward
Position of ITCZ shifts North with Northern Hemisphere summer and south with the Southern Hemisphere summer
SST July- Illustrating El Nino Southern Oscillation (ENSO)
SST- Equatorial Pacific July
SST January- El Nino Southern Oscillation
El Nino circulation
La Nina circulation
Fronts (1:2)Fronts (1:2)･ ･ Transition zone between air massesTransition zone between air masses
･ ･ Cold Front (can move very fast)Cold Front (can move very fast)- - colder air mass moving faster than warmer aircolder air mass moving faster than warmer air- - lifts warm air up in front of itlifts warm air up in front of it- - may form something called a "dry line"may form something called a "dry line"
> > associated with strong thunderstorm developmentassociated with strong thunderstorm development
- - described according to air mass which isdescribed according to air mass which isapproaching and relative motionapproaching and relative motion
･ ･ Warm Front (typically moves more slowly)Warm Front (typically moves more slowly)- - warmer air mass moving faster than cooler airwarmer air mass moving faster than cooler air- - warm air rides up over cold dense airwarm air rides up over cold dense air- - usually a wider band of "active" weatherusually a wider band of "active" weather
Fronts (2:2)Fronts (2:2)
Cyclonic stormsCyclonic storms･ ･ Associated with Low pressure systemsAssociated with Low pressure systems･ ･ Lows moved by Upper level high velocity winds Lows moved by Upper level high velocity winds
- - JetstreamJetstream
･ ･ usually involve air masses with different properties usually involve air masses with different properties - - one warm the other coldone warm the other cold- - one humid the other dryone humid the other dry