Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
ESA supports the IPY 2007-2008 activities:
First ESA step was a dedicated Announcement of Opportunity (AO) for EO data provision in support of IPY, released in 2006, with data provision since Spring 2007.
European Space Agency and IPY
ESA legacy EO data portfolio for IPY
Second ESA step implemented, in the framework of the IPY Space Task Group:
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
September 2005September 2006September 2007
Envisat ASAR for polar applications (e.g. sea ice, ice shelf, support to polar expedition):
1- Systematic coverage of Antarctica, Antarctica seas and Arctic seas, using ASAR Wide Swath Mode, HH Pol. (150 m resolution) and Image Mode, HH Pol. (25 m res.)
2- Supplementary coverage of all polar areas using ASAR Global Monitoring Mode, Polarisation HH (1000 m resolution) when ASAR not operated in Wide Swath Mode or Image Mode.
ESA IPY legacy data portfolio – Status May 2008
Legacy SAR data acquisitionLegacy SAR data acquisition
http://earth.esa.int/resources/catalogues/http://earth.esa.int/resources/catalogues/
Arctic sea ice extent Arctic sea ice extent
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
IPY Ice Logistics Portal
• To meet the demand, proposed a joint ETSI-Polar View website for Arctic and Antarctic sea ice information
• Potential for legacy beyond IPY• Sub-polar seas are included
– Baltic Sea, Hudson Bay, North Atlantic• Primary purpose of portal is to enhance safety in ice covered
waters– Operational, NRT products– Will provide info for science
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
IPY Ice Logistics Portal
http://www.ipy-ice-portal.orghttp://www.ipy-ice-portal.org
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
IPY Ice Logistics Portal
Products available IntegratedNational Snow and Ice Data CenterProducts availableIntegratedNational Ice Center (NIC)Products availableIntegratedSwedish Ice Service (SMHI)Waiting for productsIntegratedNorwegian Ice Service (met.no)Products availableIntegratedJapanese Ice Service (JMA)
Not startedInternational Ice Patrol (IIP)
In progressIcelandic Ice Service
Waiting for productsIntegratedGerman Ice Service (BSH)Products availableIntegratedFinnish Ice Service (FIMR)
Not startedEstonian Ice Service (EMHI)
Products availableIntegratedDanish Met Institute (DMI)Products availableIntegratedCanadian Ice Service (CIS)Products availableIntegratedBritish Antarctic Survey (BAS)
In progressArgentina Ice Service (SMARA)
Not startedArctic and Antarctic Research Institute (AARI)
Product AvailabilityStatusParticipating Ice Services
Products available IntegratedNational Snow and Ice Data CenterProducts availableIntegratedNational Ice Center (NIC)Products availableIntegratedSwedish Ice Service (SMHI)Waiting for productsIntegratedNorwegian Ice Service (met.no)Products availableIntegratedJapanese Ice Service (JMA)
Not startedInternational Ice Patrol (IIP)
In progressIcelandic Ice Service
Waiting for productsIntegratedGerman Ice Service (BSH)Products availableIntegratedFinnish Ice Service (FIMR)
Not startedEstonian Ice Service (EMHI)
Products availableIntegratedDanish Met Institute (DMI)Products availableIntegratedCanadian Ice Service (CIS)Products availableIntegratedBritish Antarctic Survey (BAS)
In progressArgentina Ice Service (SMARA)
Not startedArctic and Antarctic Research Institute (AARI)
Product AvailabilityStatusParticipating Ice Services
Status February 08
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Winter 2007-2008
Radarsat-1
Operational use of Envisat ASAR WS for ice chart
Credit: Finnish Institute of Marine Research
Lowest sea ice extent in Baltic Sea, since record began in 1720 !
Winter 2005-2006
EnvisatASAR
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Envisat Meris
Wilkins Ice Shelf
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Break-up of Wilkins ice-shelf (29 February 2008)
ESA IPY legacy data portfolio – Status May 2008
Image British Antarctic Survey
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Break-up of Wilkins ice-shelf
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Lost since 1995
26 April 2008
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Envisat SAR interferometry applications (e.g. slow moving glacier):
1- Since beginning 2007, systematic Envisat coverage of Antarctica, Greenland, Ellesmere island, Iceland, Svalbard and Franz-Josef Land, using ASAR Image Mode, Swath 2, Polarisation HH (25 m resolution)2- Upgrade of Envisat orbit control to have smaller interferometric baselines (0 to 250 m) over polar areas between April and Sept. 2007, aiming to facilitate retrieval of information from Envisat interferometric data pairs.
Envisat / ERS-2 SAR Tandem interferometry applications (e.g. fast moving glacier, low relief DEM’s):
First Envisat-ERS-2 Tandem phase (October 2007 to February 2008): Temporary modification of ERS-2 orbit (2 km off-set versus nominal ground track) to have optimal interferometric baselines between ERS-2 and Envisat (30 min. separation).
The ERS-2 / Envisat constellation (30 min. difference) has the potential to:
• measure velocity of fast moving polar glaciers (> 200 m/year). ERS/Envisat SAR data should be suited to map velocities of 1 cm between the two 30-minutes passes.
• generate accurate low relief Digital Elevation Models. This is of particular interest for many low elevation delta regions, in particular for polar areas (North Canada, North Russia) where there is no available SRTM DEM’s.
ESA IPY legacy data portfolio – Status May 2008
Legacy SAR data acquisitionLegacy SAR data acquisition
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Envisat ASAR:- ASAR Medium Resolution products (75 m pixel spacing):
available on-line free of charge (registration requested) about 100 ASAR scenes per day for polar areasavailable in Near Real Time (i.e. within 3 hours from data take)available as rolling archive of last 4 weeks
ERS SAR: - about 18000 products generated for ESA GlobIce project (part of Arctic Sea, 1992 – 2000),
currently not available on-line.
Easy access to ESA global instruments is already possible through the ESA category 1 registration scheme (simple registration, no fees): [http://eopi.esa.int]
• Envisat Atmospheric Chemistry (SCIAMACHY, GOMOS, MIPAS) + ERS GOME
• Envisat MERIS Reduced Resolution
• Envisat + ERS altimetry
• Envisat AATSR + ERS ATSR
Access to data
ESA IPY legacy data portfolio – Status May 2008
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Birth of a giant iceberg that has broken off from the Pine Island Glacier in West Antarctica
Length: 34 km Width: 20 km
ASAR Wide Swath, HH pol., 150 m res.
This type of Envisat ASAR products are freely available for IPY use
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Envisat Meris
Mosaic can be made available to IPY
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008MERIS RR data: available free of charge (registration requested)
MERIS Red. Resolution: 3rd May 2008
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Topex/Jason-11992-2007
Altimetry: Sea Level Change
ERS-1/-2/Envisat1992-2007
Extracted from R. Scharroo, Envisat Symposium, April 07
ERS/Envisat higher orbit inclination (35-days orbit) allows partial coverage of polar areas.
Altimetry data: available free of charge (registration requested)
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Arctic Sea level change
• Highest sea level in September
is consistent with maximum fresh
water
• Arctic sea level drops by 4
mm/yr
• Trend more difficult to explain,
but consistent with GRACE
observations
Extracted from R. Scharroo, Envisat Symposium, April 07
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
sea ice
saline water
~10%~2%
fresh water
Melting of sea ice
• Impact of melting sea ice on sea level– To first order: sea level does not change when ice melts– However: fresh water has lower density than ocean– Fresh water raises sea level– Consistent with annual cycle visible in altimeter data– Trend more difficult to explain
R. Scharroo, Envisat Symposium, April 07
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Envisat SCIAMACHY data
Ozone hole 2007: smaller than usual
Movie generated by KNMI
Atmospheric Chemistry data: available free of charge (registration requested)
Henri Laur, 3rd IPY Space Task Group meeting, 5-6 May 2008
Issues presented at 1st IPY STG in Feb. 2007
[Feb. 2007] Issues to be discussed within IPY Space Task Group:
look for inter-agency agreement that similar IPY portfolios will be accessible with
other Agencies (NASA, CSA, JAXA, etc…),
make sure that the various agency portfolios are complementary and overall
comprehensive,
establish an agreement with JAXA concerning PALSAR & Antarctica,
no portfolio redistribution by a third party,
(for ESA) to provide access to data with minimum interaction between registered
users and ESA order desks.
