SPSLCMP

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NCSP VA FOR PICs in Samoa. SEA LEVEL TREND IN
PAPUA NEW GUINEA PACIFIC REGION. Dr Chalapan
Kaluwin University of Papua New Guinea PNG
Delegation 16- 21st July 2007
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Topics Covered

• A Background to Sea Level Trends
• B Some Results in PNG and Pacific

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Factors that effect Sea Level Rise/Changes
Trends
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a) Sea/ocean Temperatures
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b) Winds
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c) Tectonics/Vertical Land Movements
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d) El Nino, Extreme events
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e) Tides
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f) Pressure
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g) Tsunami
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Instrumentation- SEAFRAME CGPS
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PNG-SEAFRAME
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Locations/Network for Forum Countries
Marshall Is
Fed. States of Micronesia
Kiribati
Manus, PNG
Nauru
Solomon Is
Tuvalu
Samoa
Vanuatu
Fiji
Tonga
Cook Is
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Results to end of June 2004
Relative Sea Level Rise (mm/year)
5.8
24.3
8.7
5.5
7.5
5.9
6.3
5.1
6.1
4.1
11.6
1.3
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Results to end of June 2004
Barometric Pressure Contribution (mm/year)
0.31
-0.34
1.56
0.58
0.55
0.47
-0.12
0.27
1.63
1.25
0.81
0.07
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Results to end of June 2004
Vertical tide gauge movement (mm/year)
0.5
n/a
0.2
-0.1
0.0
0.0
0.4
1.2
-0.3
-0.2
0.0
-0.9
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Results to end of June 2006
Net relative sea level rise (mm/year)
5.3
21.4
8.1
5.7
7.1
5.4
6.8
6.9
3.1
2.5
8.0
2.5
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Location Triton Buoys
Kavieng
Momote, Manus Is
NINO-3
0s156e
0s147e
Port Moresby
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Maximum
Sea Level (metres)
Mean
Minimum
Year
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15.36 on 10th Jan.05
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cations.

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Conclusions
1. Global sea level trends continue to rise
steadily 2. In PNG and the Pacific Islands
Rates of relative sea level rise may vary
considerably between sites due to site specific
influences such as meteorology, oceanography and
vertical tide gauge movement. 3. Climate
Variability continues to be the largest signals
in the PNG.
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Conclusions
4. Changes in atmospheric pressure need to be
monitored since they may significantly
contribute to trends in sea level Note beware
short-term datasets
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86 years of tide gauge records at Fort Denison in
Sydney Harbour show a trend of 0.9 mm/year
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Tenk yu Tumas