Tài liệu Climate change and impacts in Viet Nam pptx

CLIMATE CHANGE
AND IMPACTS IN VIET NAM
CLIMATE CHANGE
AND IMPACTS IN VIET NAM
• Viet Nam is considered as one of the most vulnerable
countries due to CC and sea level rise.
• If sea level rise of 1 m, Viet Nam will loose about 12% of
land, 23% of population will be affected.
• Typhoons occur more frequently with higher intensity.
• Temperature increases and change in rainfall pattern will
affect agriculture and water resources.
1 m
2 m
3 m
4 m
5 m
WB 2007
Impacts of sea level rise
“Large percentage of
Vietnam’s population and
economic activities are
located in these two river
deltas. 14% of Vietnam
population would be
impacted by a 1m SLR. This
is the largest percentage of
impacted population among
all 84 countries. Vietnam
impacted population would
reach 35% with a 5m SLR.
The impact of SLR on

Vietnam’s GDP and urban
extent follow the impact on
its population”.
Inundation in Mekong River Delta
due to 1 m Sea Level Rise
Source: HMS
• Annual average temperature
increases about 0.10C per decade.
In some summer months,
temperature increases about 0.1-
0.3
o
C per decade.
Source: Vietnam National communication
21.0
21.5
22.0
22.5
23.0
1974 1979 1984 1989 1994 1999 2004
2
1
3
4
O
C
Yea
r
Variability (1), climatological average (2), moving average (time
step - 11 year) (3) and linear trend (4) of Temperature at A Luoi

station.
Annual temperature
Climate Change in Vietnam
Climate Change in Vietnam
• More heavy
rainfalls
causing severe
floods;
• Rainfall
decreases in
dry season
(Jul., Aug.) and
increases in
rainy season
(Sep. to Nov.).
1000
2000
3000
4000
5000
1974 1979 1984 1989 1994 1999 2004
2
1
3
4
m
m
Year
Variability (1), climatological average (2), moving average
(time step - 11 year) (3) and linear trend (4) of August-

December rainfall at A Luoi station.
Rainfall of Aug.-
Dec.
Typhoon trajectory moves southward
and typhoon season shifts to later
months of the year;
Climate Change in Vietnam
Climate Change in Vietnam
Cumulative tracks of tropical cyclones (1985–2005)
[Nicholls et al.., 2007]