in eastern australia fewer tropical cyclones … · 2017-08-22 · el niÑo of the hottest years on...
Post on 08-Jul-2020
1 Views
Preview:
TRANSCRIPT
www.bom.gov.au
USUALLY EL NIÑO DEVELOPS IN
AND STARTS TO DECAY IN SUMMER
WHEN DO THEY OCCUR?
SPOTTING AN EL NIÑ0
increases near the Date Line
weaken, and sometimes reverse
changes across the Pacific; higher in the west, lower in the east
TYPICAL IMPACTS
DECREASESIN EASTERN AUSTRALIARAINFALL
INCREASES IN SOUTHERN AUSTRALIA (DAYTIME TEMPERATURES)
TEMPERATURE
INCREASED BUSHFIRE RISK
FEWER TROPICAL CYCLONES
LATER START TO NORTHERN WET SEASON
MORE HEATWAVES
LONGER FROST RISK SEASON
REDUCED CHANCE OF WIDESPREAD FLOODS
LESS CHANCE OF INDIAN OCEAN HEATWAVES
STRONGER SEABREEZES
OTHER IMPACTS
in the tropical Pacific Ocean warm,both at the surface and below
O N O U R C L I M AT E
ON AVERAGETHEY OCCUR EVERY
3 5 YEAR
S
2015–16WAS IN
EL NIÑO OF THE HOTTEST YEARS ON RECORD WERE IN AN EL NIÑO YEAR OR THE YEAR FOLLOWING
2002 2015
EVERY EL NIÑOIS DIFFERENT
EL NIÑO WINTER AND SPRING RAINFALL
RED = DRIER THAN NORMAL BLUE = WETTER THAN NORMAL
THERE HAVE BEEN
EL NIÑO EVENTS SINCE 1900
B R O U G H T DROUGHT TOMANY AREAS
7
OUTOF7 106OR AS LONG AS 2
EL NIÑO EVENTS CAN LAST FOR AS LITTLE AS
MONTHS YEARS
THE LAST
EL NIÑOIN AUSTRALIA
top related