Transcript GLOSS (and MedGLOSS, GCOS etc.)

International Sea Level Data Banks
Philip L. Woodworth
Permanent Service for Mean Sea Level
Oostende GLOSS Course 2006
PERMANENT SERVICE FOR
MEAN SEA LEVEL
(PSMSL)
• Established by IUGG in 1933 and member of FAGS
• Responsible for
- collection,
- analysis (including research as high level quality control),
- distribution of monthly and annual MSL data,
- provision of a wider ‘Service’
• Funding from FAGS, IOC and NERC
• Data bank contains
- 53,000 station-years of information from almost
2,000 stations in
200 ‘countries’ or coastlines,
- 1,500 station-years added per year
• If possible, all records converted to a Revised Local
Reference (i.e. common station datum)
• Data used throughout oceanography, climate change, geology
and geodesy (Most obvious application being ‘sea level rise’).
Global Sea Level Change:
Long records from each
continent from
PSMSL data bank.
Most records show evidence
for rising sea levels during
the past century
IPCC concluded that there
has been a global rise of
approximately 10-20 cm
during the past 100 years
20th Century Sea Level Rise Estimates from Tide Gauges
Region, VLM
Gornitz and Lebedeff (1987)
Peltier and Tushingham (1989, 1991)
Trupin and Wahr (1990)
Nakiboglu and Lambeck (1991)
Shennan and Woodworth (1992)
Gornitz (1995)d
Mitrovica and Davis (1995),
Davis and Mitrovica (1996)
Davis and Mitrovica (1996)
Peltier (1996)
Peltier and Jiang (1997)
Peltier and Jiang (1997)
Douglas (1997)d
Lambeck et al. (1998)
Woodworth et al. (1999)
From IPCC TAR
Global, Geological
Global, ICE-3G/M1
Global, ICE-3G/M1
Global decomposition
NW Europe, Geological
NA E Coast, Geological
Rate ± s.e.
(mm/yr)
1.2 + 0.3
2.4 + 0.9c
1.7 + 0.13
1.2 + 0.4
1.0 + 0.15
1.5 + 0.7c
Far field, PGR Model
NA E Coast, PGR Model
NA E Coast, ICE-4G/M2
NA E Coast, Geological
Global,
ICE-4G/M2
Global
ICE-3G/M1
Fennoscandia, PGR Model
UK & N Sea, Geological
1.4 + 0.4c
1.5 + 0.3c
1.9 + 0.6c
2.0 + 0.6c
1.8 + 0.6c
1.8 + 0.1
1.1 + 0.2
1.0 + 0.2
All these analyses used the PSMSL data set
PSMSL Staff
• 3 Scientists
• 1 Data manager
• But can call on wide-ranging expertise of other colleagues in
the Proudman Oceanographic Laboratory
Data Receipts
On average, 1500 station-years entered into data bank each year.
• All regions are represented, although most data continues to be
from Europe, N America and Japan
• Gaps in S America, Africa and parts of Asia receiving attention
as part of GLOSS
 All data now distributed via web (occasional CD)
Publications
• The PSMSL has a responsibility to publish scientific results on
sea level changes, as well as collect data.
• Main papers are listed each year in PSMSL Annual Reports
• Notable papers :
 Sea level chapter of IPCC Third Assessment Report (2001)
 Review of use of tide gauges during WOCE for
Oceanography & Marine Biology (2001)
 Review of work of PSMSL for Journal of Coastal Research
(2003)
 Review of science of sea level change for The Sea (2004)
 Sea level and ocean chapter of IPCC Fourth Assessment
Report (2006)
Service Aspects
• Technical advice to tide gauge operators
• Data processing advice to network operators and scientists
• Scientific advice to Governments (e.g. UK Government Chief
Scientist)
• General advice to members of the public (many now covered by
web Frequently Asked Questions). All letters and emails are
replied to
Reporting
• The PSMSL reports formally to the IAPSO Commission on
MSL and Tides
• Also reports to FAGS Council
• PSMSL also has an Advisory Group:
Dr. David Pugh, President FAGS and IOC
Dr.Ruth Nielan, Director IGS Central Bureau, JPL, USA
Dr. Gary Mitchum, University of South Florida, USA
Prof. Bruce Douglas, Maryland, USA
Dr. Richard Warrick, University of Waikato, New Zealand
Dr. Georges Balmino, Bureau Gravimetrique International,
Toulouse, France (also representing FAGS)
Reporting
All PSMSL reports are on the web
Our Web Site
http://www.pol.ac.uk/psmsl/
National and International Data Banks
for Higher Frequency Data
i.e. for the original measurements
(hourly values or similar)
See www.pol.ac.uk/psmsl/programmes/
See also the data banks especially related
to the GLOSS programmes
www.gloss-sealevel.org
UNIVERSITY OF HAWAII
SEA LEVEL CENTER
(UHSLC)
• Originally established as a centre for TOGA programme
• Later became one of the WOCE sea level centres
• Now the major GLOSS Fast and Real-Time Centre
• Research Quality Data Set (RQDS) also produced
• Also responsible to IOC for upgrades to IOTWS
GLOSS DELAYED MODE CENTRE at
BRITISH OCEANOGRAPHIC
DATA CENTRE (BODC)
ALONGSIDE PSMSL
• Located at POL in Liverpool alongside PSMSL (also a
delayed mode centre)
• GLOSS delayed mode centre collects ‘higher frequency’ (e.g.
hourly or more frequent) data from GLOSS sites
• Responsible for the GLOSS Handbook and GLOSS web
pages
Each of these GLOSS and other Centres
have their own formats
• Translation programs exist to convert data
files between the UHSLC and GLOSS DM
(PSMSL) centres and into TASK format
• However, there are always occasions when
one needs to convert from a new format –
some programming skills needed
REGIONAL GLOSS Data Centres
• MedGLOSS
• Southern Ocean (now terminated)
• Oostende IOC Facility – archiving function
for ODINAFRICA data
There are also GLOSS Resources e.g.
Web Pages, Newsletters etc. in
• South America
• China
• Africa
• etc.
From these you can find links to data etc.
GLOSS Africa Web Pages
• Who is responsible – they are somewhat out of
date ?
• Could not the web pages for the Odinafrica sea
level activities be merged with existing
GLOSS Africa?
• Especially for news, access to data from the
new stations
 Volunteers required (?)