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Permafrost of the Usa River Basin

Summary

The map consists of ESRI Shapefiles of the Usa River basin, Russia, including Lek-Vorkuta and Bolshaya Rogovaya. There are four data layers in the data set: a base map theme, a permafrost layer, and two key (permafrost) areas. Each data layer comprises several layers. The map is based on a UTM 41 projection with the WGS 1984 spheroid. Parameters include permafrost temperature and degree of continuity; permafrost temperature classes, lithology, and stratigraphy; thermokarst, pingos, mass ground ice, and topography, lakes, large rivers (in streams), rivers, and watershed boundary. Data are available via ftp.

Citing These Data:

G. Mazhitova and N. Oberman. 2003. Permafrost of the Usa River Basin. Boulder, CO: National Snow and Ice Data Center. Digital Media.

Overview Table

Category Description
Data format ESRI Shapefiles and MS Excel
Spatial coverage Usa river basin, Russia, including Lek-Vorkuta and Bolshaya Rogovaya
File naming convention ggd614_descriptive_text.ext
where descriptive_text describes the conent of the data layer or file and .ext indicates the type of file.
File size largest file is 3.87 MB
Parameter(s) permafrost temperature and degree of continuity; permafrost temperature classes, lithology, and stratigraphy; thermokarst, pingos, mass ground ice, topography
Procedures for obtaining data data are available via FTP

Table of Contents

1. Contacts
2. Detailed Data Description
3. References and Related Publications
4. Document Information

1. Contacts and Acknowledgments:

Investigator(s) Name and Title:

Galina Mazhitova
Senior Researcher
Komi Science Centre
Russian Academy of Sciences
Syktyvkar, Russia

Naum Oberman
Head of the Komi Centre for State Geological Monitoring
Syktyvkar, Russia

Technical Contact:

NSIDC User Services
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder, CO 80309-0449  USA
phone: +1 303.492.6199
fax: +1 303.492.2468
form: Contact NSIDC User Services
e-mail: nsidc@nsidc.org

Acknowledgements:

The GIS was developed under the PERUSA project supported by the INTAS foundation through the grant INTAS OPEN 97-10984. We thank Mr. Eugene Lopatin, currently at the Centre for GIS Technologies of the Forestry Highschool, Syktyvkar and Ms. Irina Shesler from the PolarUralGeology Company, Vorkuta who participated the GIS development. Special thanks to Dr. Peter Kuhry from the Arctic Centre, University of Lapland, Finland who coordinated the project and helped us to fill gaps in information exchange between Russian and western researches.

2. Detailed Data Description:

Format:

There are four data layers in the data set. Each data layer comprises several layers. The data layers are a location map (jpeg file), a base map layer, a permafrost layer, and two key (permafrost) areas. Each layer is stored as ESRI Shapefile spatial data format. The Shapefiles are most easily imported into ESRI's ArcView, but most other GIS packages can import Shapefiles. ESRI also provides a free basic GIS package, ArcExplorer, on the ESRI web site.

The Shapefiles for each layer consists of three files: ggd614_descriptive_text.dbf (attribute data), ggd614_descriptive_text.shp (feature geometry) and ggd614_descriptive_text.shx (feature geometry index). An ArcView project file is provided (ggd614_project.apr).

Filenames for this data set have the format ggd614_descriptive_text.ext, where descriptive_text describes the conent of the data layer or file and .ext indicates the type of file.

Commonly used descriptive_texts are:

permafrost, pfrst  permafrost zone map (polygons)
pingo  pingos and frost mounds (point)
thermokarst, tkrst thermokarst and other crysospheric processes (point)
ice massive ground ice (point)
borehole, bhole borehole site maps (point)

Two key study area maps are included in the data set Lek-Vorkuta and Bolshaya Rogovaya. Data layers for these regions have lekvor and rogov, respectively, in the descriptive text strings.

Basemap Layer

Layer: ggd614_streams
Data type: polygons
Description: large rivers
Attributes: Elevations a.s.l. for each contour are given in the attribute table of the layer "Hyp_line" (lines). width_midd - the average object width (e.g., average width of each river polygon). There are three classes 0, 29, and 30. 29 is "more than 120m", 30 is "200m or more", and 0 is not explained but probably is "no data."

Speed, water, width_plac, and ground attribures were not explained and had no data, so they have been removed.

Layer: ggd614_river
Data Type: line, Represents: smaller rivers
Attributes: length - is river length in meters

Layer: ggd614_lake (aqua)
Data Type: polygon
Coverage layer: lakes
Attributes: area - in square meters and hectares

Permafrost Layer

Layer: ggd614_permafrost
Data type: polygon
Description: permafrost regions
Attributes:

The attribute table contains permafrost temperature classes, lithology and stratigraphy classes. All classes in the attribute table are given as codes. Explanation of the codes are in the tables "ggd614_pfrostclass.dbf", "ggd614_lithoclass.dbf" and "ggd614_stratclass.pdf", respectively, which can be joined to the attribute table of the layer.

There are also four point layers: "Thermokarst and other cryogenic processes", "Frost mounds with massive ice", "Massive ground ice" and "Reference boreholes". To get details of a particular borehole, identify its number using Info button and then find the number in the table "ggd614_borehole_cat.dbf".

pertemp - This is a character field of width 2. There are nine possible values for the field. Values range from 1 to 9. These values correspond to annual (soil? ground?) temperature (degrees C) and a descriptive field that describes map zones as continuous, isolated and sporadic. The annual temperature values and descriptive fields that correspond to each value are given in ggd630_pfrostclass.dbf.

geology - This is a 16 character field that describes the geology and stratigraphy. Values are alphanumeric (eg a III, Pz). Lowercase letters describe rock type (sedimentary, metamorphic etc) and deposit. Sedimentary deposits as the type of deposit, a for alluvial, c for colluvial, g for glacial etc. Uppercase letters and roman numerals denote chronostratigraphic units (e.g. Paleaozoic, Upper Pleistocene, Quarternary). No distinction is made between rock types for the Proterozoic and Palaeozoic (US Paleozoic) eras. Explanations for these alphanumeric codes are given in ggd630_stratclass.dbf.

lithology - This is an 11 digit numeric field that describes the lithology, e.g. peat, sands etc. There are 8 possible values, coded 1 to 8. A description for each code is in ggd614_lithoclass.dbf.

Layer: ggd614_pingo
Data type: point
Description: ice cored mounds
Attributes: id - point id for coverage (auxiliary data)
type - all of these are 'P' for pingo
[Note: the pingos in the Usa basin are not classical pingos]

Layer: ggd614_thermokarst
Data Type: point
Description: Thermokarst features and other cryospheric processes
[thermokarst are topographic depressions that result from thawing of groundice]
Attributes: id - point id for coverage
type - all of these are 'T'

Layer: ggd614_ice
Data Type: point
Description: massive ground ice
Attributes:
id - point id for coverage
type - all of these are 'I' for ice (Check!)

Layer: ggd614_borehole
Data Type: point
Description: Location of boreholes. IDs relate to complete description contained in ggd614_bholecat.dbf (also in ggd614_bholecat.xls)
Attributes:
id - relates to id in ggd614_bholecat.dbf or xlc [can be related in ArcView]
type - all 'B' for borehole.

Key Areas

The two key areas provide detailed information about areas within the Usa Basin. "Lek-Vorkuta" represents discontinuous, and "Bolshaya Rogovaya" represents continuous permafrost zones. Layers and attributes classes are similar to those in the View "Permafrost The data layer characteristics are the same as the characteristics of the data layers for the larger Usa Basin.

Lek-Vorkuta

Layer: ggd614_permafrost_lekvor
Data type: polygon
Description: permafrost zones
Attributes: [For full descriptions permafrost zone map above]
permtemp - annual temperature and continuity of permafrost
geology - Chronostratigraphy of zone
lithology - Lithology of zone

Layer: ggd614_pingo_lekvor
Data type: point
Description: ice-cored mounds
Attributes: ID [No value, zero]

Layer: ggd614_thermokarst_lekvor
Data type: point
Description: thermokarst and cryospheric processes
Attributes: ID [No value, zero]

Layer: ggd614_borehole_lekvor
Data type: point
Description: location of borehole sites in Lek-Vorkuta key area
Attributes: userid, number - relates to BOREHOLE field in catalog.dbf

Bolshaya Rogova

Layer: ggd614_permafrost_rogov
Data type: polygon
Description: Permafrost zones in the Bolshaya Rogova key area
Attributes: permafrost, geology, lithology

Layer: ggd614_pingo_rogov
Data type: point
Description: ice cored mounds in the Bolshaya Rogova key area
Attributes: id [no data in this field, all zeros]

Layer: ggd614_thermokarst_rogov
Data type: point
Description: Thermokarst and kryospheric processes in the Bolshaya Rogova key area.
Attributes: id [no data in this field, all zeros]

Layer: ggd614_borehole_rogov
Data type: point
Description: Location of borehole sites in the Bolshaya Rogova key area
Attributes: userid, sites - relates to BOREHOLE field in catalog.dbf

Borehole Catalog

The borehole catalog (ggd614_bholecat.dbf) contains borehole log and other data for borehole locations in the ggd614_borehole, ggd614_bhole_lekvor and ggd614_bhole_rogov layers. The catalog is also available as an Excel file. The fields in these files are listed below.

Field Description
Borehole site number site number
Location General geographic area that borehole is located in
Landform Type of landform borehole is located in
Vegetation Vegetation cover at borehole site
Period_of_ Period of observation
Snow Depth Snow depth at borehole site in meters (m)
Lithological layer (6 columns) Lithology, including geostratigraphic code, of borehole.Each distinct layer is described in a separate column.
Water_cont (first column) Water content in the active layer before winter freezing as a percentage
Water_cont (second column) Water content in the active layer at the end of
Seasonally  
Depth_of_z  
Temperature  
Elevation Elevation of borehole in meters (m)
Zpatterned Patterned gound type or micro-relief
Notes_to_  
Column 7  
Column 8  
Column 9  
Column 10

File Size:

The ESRI Shapefiles range from 102 B to 3.87MB.

Spatial Coverage:

The map covers the Usa river basin, Russia, including Lek-Vorkuta and Bolshaya Rogovaya. The map is based on a UTM 41 projection with the WGS 1984 spheroid. The default unit for this projection is meters.

Spatial Coverage Map:

Parameter or Variable:

This data set consists of permafrost temperature and degree of continuity; permafrost temperature classes, lithology, and stratigraphy; thermokarst, pingos, mass ground ice, and topography, lakes, large rivers (in streams), rivers, and watershed boundary.

3. References and Related Publications:

N.G. Oberman & G.G. Mazhitova. 2001. Permafrost dynamics in the north-east of European Russia at the end of the 20th century. Norwegian Journal of Geography, 55(4): 241-244.

N.G. Oberman & G.G. Mazhitova. 2003. Permafrost mapping of Northeast European Russia based on the period of climatic warming 1970-1995. Norwegian Journal of Geography, 57(2): 111-120.

4. Document Information:

Document Creation Date:

25 May 2003

Document URL:

http://nsidc.org/data/ggd614.html