database for task 2 (dbt2) technical...

Database for Task 2 (DBT2)

Technical Note

Prepared by: Glaciers_cci consortium Contract: 4000101778/10/I-AM

Name: Glaciers_cci-DBT2-TN Version: 1.0 Date: 11.12. 2011

Contact: Frank Paul Department of Geography University of Zurich Winterthurerstr. 190 CH-8057 Zurich [email protected]

Technical Officer: Stephen Plummer ESA ESRIN

Contract: 4000101778/10/I-AM

Database for Task 2 DBT2 Tecnical Note

Name: Glaciers_cci- DBT2-TN Version: 1.0 Date: 11.12. 2011 Page: 2

Document status sheet

Version Date Changes Approval 0.9 05.12.2011 Draft 1.0 09.12.2011 All modifications by project partners incorporated

The work described in this document was done under ESA contract 21088/07/I-EC. Responsibility for the contents resides in the authors that prepared it. Author team: Thomas Nagler, Helmut Rott, Kilian Scharrer (ENVEO), Tazio Strozzi (Gamma), Andrew Shepherd, Francesca Ticconi (SEEL), Frank Paul, Tobias Bolch, Nico Mölg (GIUZ), Andreas Kääb, Chris Nuth (GUIO) Glaciers CCI Technical Officer at ESA: Stephen Plummer

Contract: 4000101778/10/I-AM



Contents

1. Purpose of the database............................................................... 4

2. Access to the database ................................................................. 4

3. Structure of the database ............................................................ 5 3.1. Database for glacier area...........................................................................................6

3.2. Database for elevation change...................................................................................8

3.3. Database for glacier velocity ...................................................................................13

Contract: 4000101778/10/I-AM



1. Purpose of the database

This document gives an overview of the Database for Task 2 (DBT2) within the Glaciers_cci project. The database includes all datasets collected by the Glaciers_cci consortium that are required for product validation and the round robin exercises (RR). Analysis of the round robin results and their comparison to validation data will be performed internally. The RR participants will be provided with all Earth Observation (EO) and auxiliary datasets necessary for generating the respective dataset, the validation data will in general not be distributed. This approach will ensure that the analysis of the RR will be conducted under the same conditions and follow consistent guidelines for all products. Furthermore, this avoids copyright issues with data held by consortium members (e.g. high resolution national DEMs). For the glacier area product however, some validation datasets will be made available as well (high-resolution satellite images), as they are based on screenshots from Google Maps. Freely available datasets like ICESat GLAS and Envisat RA2 altimetry data, or the ASTER GDEM Version 2 (GDEMv2) and the SRTM Version 2 digital topographic data are not stored in the Glaciers_cci database. For quick access to these public data, links pointing to the distribution centres are provided respectively.

2. Access to the database

The database is available for the Glaciers_cci consortium as well as for authorised round robin participants under:

http://glacier_cci.enveo.at All data approved for the round Robin tests can be downloaded via this interface. The current size of the database is 41.1 GB. User authorisation is required for accessing the database in order to track the distribution of the data. For access to the database and participant registration, the scientific lead has to be contacted by email:

[email protected]

Contract: 4000101778/10/I-AM



3. Structure of the database

The database follows a logical structure organized by the individual products and test sites. This ensures an easy modification or expansion of the database to changes that might occur in the course of the project. Fig. 1 illustrates the general structure schematically.

Fig. 1: The structure of the database assembled within the Glaciers_cci project.

Contract: 4000101778/10/I-AM



3.1. Database for glacier area

Fig. 1 shows the structure and content of the database for the glacier area product with the EO datasets assembled for the RR exercise. Table 1 lists the test sites selected for validation and the RR exercises.

Fig. 2: Structure and content of the database for the glacier area product.

Coverage (Latitude, Longitude in decimal degrees)

ID Glacier Region Upper left Corner

(Lat Lon, Dec Deg) Upper Right Corner (Lat Lon, Dec Deg)

Lower left Corner (Lat Lon, Dec Deg)

Lower Right Corner (Lat Lon, Dec Deg)

GA1 Chugach Mts.

61.15N, 144.6W 60.65N, 144.05W

GA2 Oetztal Alps 46.9N, 10.65E 46.7N, 10.9E

GA3 Silvretta Gotthard

46.85N, 10.15E 46.52N, 8.46E

only centre coordinates

GA4 Kashmir 34.33N, 75.45E 34.0N, 75.95E

GA5 Khumbu Himalaya

28.2N, 86.8E 27.8E, 87.0E

Table 1: Corner coordinates of the test sites selected for glacier area.

Contract: 4000101778/10/I-AM



Table 2 shows the EO datasets available for RR participants for the glacier area product. Table 3 shows the validation datasets available for the different test sites selected for glacier area.

EO Data

ID Satellite / Sensor

Path / Row

Acquisition Date: YYYY-‐MM-‐DD

Acquisition Time (UTC: hh:mm)

Upper left Corner (Lat, Lon, Dec Deg.)

Upper Right

Corner (Lat, Lon, Dec Deg.)

Lower left Corner (Lat, Lon, Dec Deg.)

Lower Right


GA1 Landsat 5 TM

066/017 2009-‐09-‐06 nominal see

coverage see

coverage see

coverage see

coverage

GA2 Landsat 5 TM

193/027 2003-‐07-‐30 nominal see

coverage see

coverage see

coverage see

coverage

GA3 Landsat 5 TM

193/027 194/027

2009-‐08-‐31 2009-‐09-‐23

nominal see

coverage see

coverage see

coverage see

coverage

GA4 Landsat 7 ETM

148/035 2000-‐09-‐04 nominal see

coverage see

coverage see

coverage see

coverage

GA5 ASTER 140/041 2001-‐12-‐20 nominal 28.2N, 86.8E

see coverage

see coverage

27.8E, 87.0E

Table 2: Available EO data for the glacier area test sites.

Validation data ID

Specification of valid data

Center point (Lat Lon, Dec. Degrees)

Acquisition date: YYYY-‐MM-‐DD

Source

GA1 Quickbird see coverage 2004-‐09-‐07 from Google Maps

GA2 Ikonos see coverage 2003-‐08-‐12 from Google Maps

GA3 Aerial see coverage 2009-‐10-‐04 from Google Maps

GA4 Quickbird see coverage 2006-‐09-‐19 from Google Earth

GA4 ALOS-‐PALSAR (Coherence)

see coverage 2007-‐07-‐12, 08-‐27 Eoli

GA5 Ikonos see coverage 2000-‐12-‐18 2001-‐11-‐29

GeoEye, Technical University Dresden

GA5 ALOS-‐PALSAR (Coherence)

see coverage 2009-‐08-‐02, 09-‐17 Eoli

Table 3: Available validation data for the glacier area test sites.

Contract: 4000101778/10/I-AM



3.2. Database for elevation change

Fig. 3 shows the structure and content of the database for the glacier elevation change product with the EO datasets assembled for the RR exercise.

Fig. 3: Structure and content of the database for the glacier elevation change product. The following Table 4 and Table 5 together with the time line plots (Fig. 4) give an overview of the datasets available for validation and RR for the participants of the glacier elevation change product. As the datasets are freely available, they will not be stored in the DBT2. However, links to the dataset providers will be available. Test sites EC1 and EC2 are selected for the validation/RR of altimetry, sites EC3 and EC4 for DEM differencing.

Contract: 4000101778/10/I-AM



Fig. 4: Temporal coverage of EO and validation data sets for the elevation change product – altimetry. Table 4 lists the test sites selected for validation efforts and RR exercises for the glacier elevation change product. Table 5 lists the EO datasets available for RR participants for the glacier elevation change product. Table 6 shows the validation datasets available for different test sites for the glacier elevation change product. The airborne altimetry datasets of the CRYOVEX campaign can be requested at the web-addresses listed in Table 7 (Devon ice cap) and Table 8 (Austfonna). User authorisation is required to access the datasets.

Contract: 4000101778/10/I-AM



Coverage (Latitude, Longitude in decimal degrees) ID

Glacier Region Upper left Corner

(Lat Lon, Dec Deg) Upper Right Corner (Lat Lon, Dec Deg)



EC1 Devon Ice

Cap 76N, 273E 76N, 281E 74N, 273E 74N, 281E

EC2 Austfonna Ice

Cap 81N, 17E 81N, 27E 79N, 17E 79N, 27E

EC3 Findelen glacier

46N,7E 46N,7E 46N,7E 46N,7E

EC4 New Zealand 42S, 168E 42S, 170E 46S, 168E 46S,170E

Table 4: Test sites for glacier elevation change.

EO Data

ID Satellite /

Sensor

Path /

Row




Upper Right Corner (Lat, Lon, Dec Deg.)


Lower Right Corner (Lat, Lon, Dec Deg.)

EC1 ENVISAT/RA2 N/A 2002-‐present N/A 76N, 273E 76N, 281E 74N, 273E 74N, 281E

EC1 IceSat/GLAS N/A 2003-‐2009 N/A 76N, 273E 76N, 281E 74N, 273E 74N, 281E

EC2 ENVISAT/RA2 N/A 2002-‐present N/A 81N, 17E 81N, 27E 79N, 17E 79N, 27E

EC2 IceSat/GLAS N/A 2003-‐2009 N/A 81N, 17E 81N, 27E 79N, 17E 79N, 27E

EC3 ASTER N/A

2002-‐07-‐19 2002-‐09-‐28 2003-‐07-‐20 2006-‐07-‐21 2009-‐08-‐05 2009-‐10-‐01

N/A 46N,7E 46N,7E 46N,7E 46N,7E

EC3 SRTM N/A 2000 N/A 46N,7E 46N,7E 46N,7E 46N,7E

EC3 IceSat/GLAS N/A 2003-‐2009 N/A 46N,7E 46N,7E 46N,7E 46N,7E

EC4 ASTER N/A

2001-‐04-‐07 2002-‐02-‐14 2003-‐02-‐24 2006-‐02-‐09

N/A 42S, 168E 42S, 170E 46S, 168E 46S,170E

Table 5: Available EO data for the glacier elevation change test sites. The satellite altimetry datasets required for the RR exercise are freely available at the following web-addresses:

NASA ICESat/GLAS data: http://nsidc.org/data/icesat/index.html ESA Envisat RA-2 data*: http://eopi.esa.int/esa/esa?cmd=aodetail&aoname=Registration

* This is the link where the user hast to register to get free acces to ERS-1/ERS-2 RA and ENVISAT RA-2.

Contract: 4000101778/10/I-AM



Validation data

ID Specification of validation

data Center point (Lat Lon, Dec. Degrees)

Acquisition date: YYYY-‐MM-‐DD

Source

EC1 CRYOVEX Repeat airborne

laser altimetry 75N, 277E

2006-‐05-‐05 2008-‐05-‐05

ESA



2006-‐05-‐05 2008-‐05-‐05

ESA



2006-‐05-‐01 2007-‐04-‐18,20,21

ESA

EC3 LIDAR DEM

2005-‐10-‐28,29 2009-‐04-‐10 2010-‐04-‐10 2010-‐09-‐29

EC4 New Zealand National DEM 44S, 169E

Table 6: Available validation data for the glacier elevation change test sites. 2004

May 2 Flight over Devon Ice Cap ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processed_Data_Sets/CryoVEx/CryoVEx_2004_v1.0/Spring/040

5020401/ProcessedData/als/

Sep. 11 Flight over Devon Ice Cap ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processed_Data_Sets/CryoVEx/CryoVEx_2004_v1.0/Autumn/04

09110401/ProcessedData/als/ 2006

May 5 Flight over Devon Ice Cap -‐ note only northern transect due to

poor weather conditions

ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processed_Data_Sets/CryoVEx/CryoVEx_2006/ALS/

2008

May 6 Flight over Devon Ice Cap ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processe

d_Data_Sets/CryoVEx/CryoVEx_2008/ALS/ Table 7: Summary of CryoVEX Datasets over Devon Ice Cap.

Contract: 4000101778/10/I-AM



2003 April 15 Polarstern and additional survey

over Austfonna Glacier

2004 April 19 Test flights in Longyearbyen region

and over glaciers north of Billefjorden

ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processed_Data_Sets/CryoVEx/CryoVEx_2004_v1.0/S

pring/0404190101/ProcessedData/als/ April 20 Test flights over Austfonna ice cap ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro

cessed_Data_Sets/CryoVEx/CryoVEx_2004_v1.0/Spring/0404200201/ProcessedData/als/

April 25 Flight over Austfonna ice cap – note problems with aircraft power

systems

ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Processed_Data_Sets/CryoVEx/CryoVEx_2004_v1.0/S

pring/0404250301/ProcessedData/als/ 2006 May 1 Austfonna ice cap ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro

cessed_Data_Sets/CryoVEx/CryoVEx_2006/ALS/ May 2 Kongsvegen Glacier ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro

cessed_Data_Sets/CryoVEx/CryoVEx_2006/ALS/ 2007 April 16 Kongsvegen Glacier test flights ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro

cessed_Data_Sets/CryoVEx/CryoVEx_2007/ALS/ April 18 Austfonna ice cap flights ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro

cessed_Data_Sets/CryoVEx/CryoVEx_2007/ALS/ April 19 Kongsvegen Glacier test flights ftp://ftp.cryosat.esa.int/from_estec/CryoVEx_Pro



cessed_Data_Sets/CryoVEx/CryoVEx_2007/ALS/ Table 8: Summary of CryoVEX data sets over Svalbard archipelago.

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3.3. Database for glacier velocity

Fig. 5 shows the structure and content of the database for the glacier velocity product with the EO datasets assembled for the RR exercise. Table 9 lists the test sites selected for validation efforts and RR exercises for the glacier velocity product. Table 10 lists the EO datasets available for RR participants for the glacier velocity product. Table 11 shows the validation datasets available for different test sites for the glacier velocity product.

V1 Breidamerkurjökull V2 Kronebreen V3 Nordaustlandet

Fig. 5: Structure and content of the database for the glacier velocity product.

Contract: 4000101778/10/I-AM



Coverage (Latitude, Longitude in decimal degrees)

ID Glacier Region Upper left Corner (Lat Lon, Dec

Deg)

Upper Right Corner (Lat Lon, Dec Deg)



V1 Breidarmerkurjökull 64.1349, -‐16.4902 64.1858, -‐16.2545 64.0992, -‐16.1523 64.0474, -‐16.3967

V2 Kronebreen 78.9N, 12.4E 78.9N, 13.3E 78.8N, 12.4E 78.8N, 13.3E

V3 Nordaustlandet 80.5, 18.0 80.5, 27.0 79.0, 18.0 79.0, 27.0

V4 Baltoro glacier Karakorum

36N,76E 36N,76.7E 36N,76.7E 35.6N,76.7E

Table 9: Test sites for glacier velocity.

EO Data

ID

Satellite / Sensor

Path / Row or Track / Frame




Upper Right



Lower Right Corner (Lat,

Lon, Dec Deg.)

V1D1 TSX

2008-‐08-‐04 2008-‐08-‐15 2008-‐08-‐26 2009-‐09-‐06

07:31 64.48, -‐16.56

64.43 -‐15.91

63.99 -‐16.80

63.93, -‐16.14

V1D2 ALOS-‐PALSAR

9/1280

2007-‐08-‐11 2007-‐09-‐26 2008-‐02-‐11 2008-‐03-‐28 2008-‐07-‐27 2008-‐09-‐11 2009-‐07-‐01 2009-‐10-‐01 2010-‐01-‐01 2010-‐04-‐03

23:03 63.98, -‐15

63.86, -‐16.32

64.35, -‐16.56

64.47, -‐15.22

V1D3 Landsat 7

ETM 217/15

2007-‐07-‐09 2008-‐04-‐06 2008-‐08-‐12 2009-‐08-‐15 2009-‐10-‐18

12:17 65.25,

-‐19.45

63.15,

-‐13.89

63.10,

-‐19.12

63.15,

-‐13.97

V2D1 TSX 2008-‐03-‐25 2008-‐04-‐27 2008-‐05-‐08

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EO Data

ID

Satellite / Sensor

Path / Row or Track / Frame




Upper Right



Lower Right Corner (Lat,

Lon, Dec Deg.)

V2D2 ASTER

2008-‐08-‐15 2009-‐07-‐02 2009-‐07-‐14 2009-‐08-‐01 2010-‐08-‐03

V2D3 ALOS-‐PALSAR

601/1590

2008-‐01-‐16 2008.06.02 2008.07.18 2009-‐07-‐21 2010-‐06-‐08 2010-‐01-‐21

20:17 78.91, 15.28

78.71, 12.44

79.18 11.44

79.39 14.39

V2D4 ENVISAT-‐ASAR

481

2007-‐09-‐23 2007-‐10-‐28 2007-‐12-‐02 2008-‐01-‐06 2008-‐02-‐10 2008-‐05-‐25 2008-‐09-‐07 2008-‐12-‐21

11:14 79.53 12.23

78.98 16.52

78.19 13.73

78.71 9.63

V2D5 Landsat 7

ETM 217/3

2010-‐08-‐02 2011-‐08-‐05

12:15 80.29 8.47

80.26 23.04

77.85 9.77

77.83 21.44

V3D1 ALOS-‐PALSAR

576/1600-‐1620

583/1600-‐1620

2008-‐01-‐05 2008-‐02-‐01 2008-‐02-‐20 2008-‐03-‐18

19:26

19:41

79.62 23.72 80.53 17.58

79.85 26.78 80.77 20.89

79.16 24.8 80.07 18.86

79.37 27.75 80.3 22.04

V3D2 ERS-‐3 day repeat

1992/1994

13

23

1992-‐02-‐07 1992-‐02-‐19 1994-‐03-‐02 1994-‐03-‐14

18:35

11:25

80.31 18.59 79.05 22.61

80.87 22.8 79.53 18.65

79.15 23.82 80.2 27.69

79.66 27.81 80.74 23.49


385 2007-‐12-‐30 2008-‐02-‐03

18:12 80.08 16.95

80.69 21.46

78.95 21.92

79.5 26.19

V4D1 ALOS-‐PALSAR

524/700-‐710

2007-‐08-‐10 2007-‐09-‐25

17:23 35.46 76.69

35.35 75.98

36.35 75.75

36.45 76.48


377/2886 2004-‐04-‐04 2004-‐08-‐22 2005-‐04-‐24

05:05 36.28 76.23

36.07 77.43

35.13 77.17

35.33 76

V4D3 Landsat 7

ETM 148/35

2000-‐06-‐16 2001-‐07-‐21

05:18 37.014 75.40

36.97 78.13

35.09 75,39

35.05 78.06

Table 10: Available EO data for the glacier velocity test sites.

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Validation data ID Specification of valid data Acquisition date: YYYY-‐MM-‐DD Source

V1 Continuous DGPS (BMJ2) Aug 2008 – Feb 2009 Jul 2009 -‐ present

University of Iceland

V1 Continuous GPS (BMJ3) Aug 2008 – Okt 2008 University of Iceland

V1 Continuous GPS (BMJ5) Aug 2008 – Nov 2008 University of Iceland

V2 Continuous GPS/DGPS (10 locations) Sep 2008 -‐ present University of Oslo

V3 35 annually repeated GPS velocity

measurements 2007 -‐ 2010

Uppsala University, Sweden

V3 Continuous GPS (10 locations) May 2008 – May 2010 University of Oslo

V3 1-‐day repeat ERS-‐InSAR 1995-‐12-‐28,29 1996-‐02-‐01,02

ESA, FP7 INTEGRAL project

Table 11: Available validation data for the glacier velocity test sites.

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