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270 results for “permafrost”
Cover Image for a special issue of Permafrost and Periglacial Processes: Transactions of the International Permafrost Association Number 3
<p>The cover image is based on the Original Article* <em>Recent Advances in the Study of Arctic Submarine Permafrost</em> by Michael Angelopoulos** et al., <a href="https://doi.org/10.1002/ppp.2061">https://doi.org/10.1002/ppp.2061</a>.*** Source Credit: GRID‐Arendal; Overduin, et al. (2019); Obu, et al. (2019). This map was produced as part of the Nunataryuk project, which has received funding under the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement no. 773421.</p>
InSAR estimates of excess ground ice concentrations near the permafrost table, Kivalina, Alaska, USA
<p>Each subfolder contains the posterior mean and variance of excess ice concentrations [dimensionless] near the permafrost table estimated from Sentinel-1 InSAR, stored as a geotiff file. The folders correspond to four different estimation configurations:</p> <table> <tbody> <tr> <td>name</td> <td>year</td> <td>ebar period</td> <td>input data</td> </tr> <tr> <td>baseline</td> <td>2019</td> <td>(900 ◦C d, 2019-09-15)</td> <td>2019-06-06 – 2019-08-29</td> </tr> <tr> <td>later ebar</td> <td>2019</td> <td>(1000 ◦C d, 2019-09-15)</td> <td>2019-06-06 – 2019-08-29</td> </tr> <tr> <td>extra scene</td> <td>2019</td> <td>(900 ◦C d, 2019-09-15)</td> <td>2019-06-06 – 2019-09-10</td> </tr> <tr> <td>2018</td> <td>2018</td> <td>(900 ◦C d, 2018-09-15)</td> <td>2018-06-11 – 2018-09-03</td> </tr> </tbody> </table>
Permafrost Degradation and Concomitant Hydrological Changes Dominated by Anthropogenic Greenhouse Gas Emissions in the Northeastern Tibetan Plateau
<h2>The result for</h2> <p><strong><span>Permafrost Degradation and Concomitant Hydrological Changes Dominated by Anthropogenic Greenhouse Gas Emissions in the Northeastern Tibetan Plateau</span></strong></p> <ul> <li> <p><strong>simulation Outputs </strong><br>out_year_with_ant.xlsx</p> </li> <li> <p><strong>Multi-Model Ensemble (MME) Outcomes</strong><br>The ensemble results of different forcing scenarios, providing comparative insights into the impacts of various external forcings.</p> </li> <li> <p><strong>Detection and Attribution Results Using Optimal Fingerprinting</strong><br>da.xlsx: Detection and attribution results obtained through the optimal fingerprinting method, identifying the influence of specific forcings on permafrost degradation and hydrological changes.</p> </li> </ul>
Data from: Distinct microbial communities in the active and permafrost layers on the Tibetan Plateau
Open the record for dataset details and reuse information.
Map of Natural (Landscape) and Permafrost Zones and the Net of Soil Temperature Meteorological Stations in Russia and Middle Asian Mountains, Version 1
This data set is a vector coverage of the Map of Natural Landscape and Permafrost Zones and the Net of Soil Temperature Meteorological Stations in Russia and Middle Asian Mountains (scale 1:4000000), published by the Russian Academy of Sciences Earth Cryosphere Institute and Institute for Phytochemical and Biological Problems in Earth Science The original map was compiled by E. Melnikov and D.A. Gilichinsky. The digital map was created in Geograph, which is a Geographic Information System developed by the GIS Research Center, Institute of Geography, Russian Academy of Sciences. Data are available through FTP.
Permafrost monitoring and prediction in Southern Carpathians, Romania, Version 1
This study monitored the summer temperatures (July and August) of the springs at the base of the rock glaciers' fronts and talus cones of Fagaras and Retezat Mountains. These water measurements have been made since 1986. BTS (bottom temperature of snow) measurements were made in the same areas during the second and third weeks of February since 1992. Data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Permafrost Map of Alaska, USA, Version 1
This data set consists of a geo-referenced digital map and attribute data derived from the publication 'Permafrost map of Alaska'. The map is presented at a scale of 1 to 2,500,000 and shows the correlation of physiographic province to presence of permafrost across the state of Alaska. The digital data were prepared under the U.S. Geological Survey Global Change Program, Land Data Systems - Arctic Land Processes Studies for display and analysis of terrain. The line work was captured by hand digitizing the source map, Ferrians, O.J., 1965, Permafrost map of Alaska - U.S. Geological Survey Miscellaneous Geologic Investigations Map I-445. Scale 1 to 2,500,000. The digital map was assembled and edited in ARC/INFO. The source map projection is polyconic. It is based on the Clarke 1866 ellipsoid with a central meridian of 150 W longitude. The data were geo-referenced from digitizer coordinates to the polyconic projection and then projected into an Albers Equal Area projection. The coastline was taken from the U.S Geological Survey, 1 to 2,000,000 scale Digital Line Graph data (U.S. Geological Survey, 1987). Attributes for the permafrost map were assigned. Metadata documentation was completed in 1996. The map units are closed polygons that are generalized in shape and size. They are defined in terms of their physiographic characteristics and association with permafrost. Each unit differs with respect to all other units and is uniquely identified as follows.11 Mountainous Area underlain by continuous permafrost12 Mountainous Area underlain by discontinuous permafrost13 Mountainous Area underlain by isolated masses of permafrost21 Lowland and Upland Area underlain by thick permafrost22 Lowland and Upland Area underlain by moderately thick to thin permafrost23 Lowland and Upland Area underlain by discontinuous permafrost24 Lowland and Upland Area underlain by numerous isolated masses of permafrost25 Lowland and Upland Area underlain by isolated masses of permafrost26 Lowland and Upland Area generally free of permafrostUse constraints - The U.S. Geological Survey should be acknowledged as the data source in products derived from these data. The data are general in nature and should not be used at a scale larger than 1 to 2,500,000, that of the original map. Users must assume responsibility to determine the usability of this data for their purposes. The use of these data is not restricted and may be interpreted by organizations, agencies, units of government or others; however, they are responsible for its appropriate application. Digital data files are periodically updated. Files are dated and users are responsible for obtaining the latest revisions of the data. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. A copy of this map is presented on the CAPS Version 1.0 CD-ROM, June 1998.
Soil Temperature Station Data from Permafrost Regions of Russia (Selection of Five Stations), 1915 - 2000, Version 1
This data set includes soil temperature data from boreholes located at five stations in Russia: Yakutsk, Verkhoyansk, Pokrovsk, Isit', and Churapcha. The data have been compiled into five Microsoft Excel files, one for each station. Air temperature measured at these five stations was also included when available. This data set was compiled to go with a classroom learning activity called "How Permanent is Permafrost." To view the activity, see the PDF file of the same name under the General Resources section below.There are two different versions of the Excel files: a complete version and a subsetted version. Both versions exist for each of the five stations for a total of 10 files. The complete versions of the files contain borehole temperature data at all available standard depths: 0.2 m, 0.4 m, 0.6 m, 0.8 m, 1.2 m, 1.6 m, 2.0 m, 2.4 m, and 3.2 m. The subsetted versions of the files contain data from the 0.8 m and 3.2 m depths only. The complete version is more applicable to scientific investigation. The subset version is provided for K-12 teachers and is featured in the "How Permanent is Permafrost?" classroom activity.
Borehole temperatures from mountain permafrost monitoring, Mongolia, Version 1
Location and description of some geocryological boreholes in Mongolia. Data include latitude, longitude, location, depth of permafrost top and bottom, and mean annual soil temperature. These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Land Resources of Russia -- Maps of Permafrost and Ground Ice, Version 1
This data set includes maps of permafrost extent, permafrost temperature, the permafrost boundary, and ground ice thickness for all of Russia. The maps are ESRI Shapefiles, which were digitized from paper maps taken from the World Atlas of Snow and Ice Resources, 1997, Institute of Geography, Russian Academy of Sciences, Moscow, Russia. The scale of the source maps range from 1:20,000,000 to 1:40,000,000. Polygons were assigned attributes based on the classes used in the legends of the paper map.These data were extracted from a larger collection entitled Land Resources of Russia. Data and documentation © 2002 copyright International Institute for Applied Systems Analysis and the Russian Academy of Sciences.
Permafrost Temperature Data from a Deep Borehole Array on the Arctic Slope of Alaska, 1973 - 2014, Version 1
These data consist of fully processed permafrost temperature data from borehole logs acquired by the U.S. Geological Survey (USGS) from the 24-element US Department of the Interior (DOI) Global Terrestrial Network for Permafrost (GTN-P) Deep Borehole Array in arctic Alaska beginning in 1973 and ending in 2014. The data represent the true temperatures in the wellbores and surrounding rocks at the time of the measurements.
Permafrost-related micrometeorology and soil temperatures, Qingzang Plateau, China, Version 1
These data sets include Surface Meteorological Data (D100, D105, Tanggula Pass, Wetland), Ground Temperature (D100, D105, Tanggula Pass, Wetland), Soil Moisture Data, Evaporation, and soil physical properties. These data sets include maximum, mean, minimum air temperature, wind speed, relative humidity, global solar radiation, reflected solar radiation, atmospheric pressure, ground surface and soil temperature, soil moisture content, and soil physical properties. Numerous papers have been published by the investigators using these data sets; references are not available as of March 1998. These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Active layer and permafrost properties, including snow depth, soil temperature, and soil moisture, Barrow, Alaska, Version 1
This data set contains soil temperature, soil moisture, thaw depth, and snow depth data collected at test sites near Barrow, Alaska, during the following years.Soil temperature data - 1963-1966, 1993 Soil moisture data - 1963 Thaw depth - 1962-1968, 1991-1993 Snow depth - 1963-1964 This study focused on characterizing the active soil layer at Barrow, and determining the relationships between and among these physical properties at permafrost sites in the Arctic.This site is U1 of the IPA's Circumpolar Active Layer Monitoring (CALM) Program and later measurements are available at the CALM Web site.
Permafrost of the Usa River Basin, Version 1
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 layer, a permafrost layer, and two key (permafrost) areas. Each data layer comprises several sub-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.
Borehole locations and permafrost depths, Alaska, USA, Version 1
The methods utilized by the U.S. Geological Survey to measure subsurface temperatures have evolved considerably over the years. Although some of the early measurements were obtained using thermistor strings frozen into permafrost, the vast majority of the measurements were made in fluid-filled holes using a custom temperature sensor. A typical sensor used in Alaska prior to 1989 consisted of a series-parallel network of 20 thermistors; see Sass et al. [1971] for a more detailed description. During a logging experiment, the resistance of the thermistor network was determined using a Wheatstone bridge prior to 1967. After that time, a 4-wire resistance measurement was made using a commercial 5.5-digit multimeter (DMM). Before 1984, boreholes were logged in the 'incremental' or 'stop-and-go' modes; the vertical spacing of the measurements was typically 3-15 m. Beginning in 1984, the depth/resistance measurements were automatically stored on magnetic tape, allowing boreholes to be logged in the 'continuous' mode; the typical data spacing for the continuous temperature logs was 0.3 m (1 ft). Many of the Alaskan boreholes were re-logged several times to quantify the thermal disturbance caused by drilling the holes (see Lachenbruch and Brewer [1959]). A review of current temperature measuring techniques used by the USGS in the polar regions is given by Clow et al. [1996]. Data from 1950-1989 are included on the CAPS CD-ROM Version 1.0, June 1998.
Permafrost, palsas and frost-crack polygons, Salluit, Quebec, Canada, Version 1
This dataset includes temperature conditions for ice-wedge cracking, Salluit, northern Quebec. Air temperature, soil temperature, wind speed and direction, July 1989 through April 1991 (not continuous record.) Temperature inside data logger, resistance values along cracking detection circuit, July 1989 through August 1991 (not continuous record.) Data are presented on the CAPS Version 1.0 CD-ROM, June 1998. See also GGD360 and GGD361 for other data available from Centre d'Etudes Nordiques climatological research station network.
Borehole permafrost data, Kumtor and Taragai Valleys, Tienshan, Kazakhstan, Version 1
This dataset includes observations of the permafrost temperatures in the Inner Tien Shan were started in 1986 by Kazakhstan Alpine Permafrost Laboratory. Observations are carried out on more than 40 boreholes, at altitudes between 3300-4200 m. The depths of the boreholes vary from 30 to 600 m. The boreholes are located in both loose (moraines) sediments and bedrock. Several boreholes are situated in the territory of the 'Kumtor' goldmine. The geocryological conditions of goldmine 'Kumtor' and nearby territory have been discussed in scientific reports 1988, 1989 and articles (see references). Two boreholes were drilled in body of glacier 'Davydov' and located in the central and lateral parts of the glacier (depth - 30 m). A third borehole passed through the glacier, moraine and bedrock to a depth of 600 m. In the Kumtor and Taragai valleys, permafrost temperature in 14 boreholes from 25 to 50 m depth, between 3300-3750 m ASL were observed. The distance between outermost boreholes is about 40 km.Temperature measurements in 9 geological prospecting adits [tunnels] (lengthwise 1500-1900 m) located in the four neighboring valleys (altitudes from 3920 to 4010 m) were carried out. At the same sites, but in natural conditions, the thermal conductivity of the bedrock was determined by the cylindrical sounding method. Grain size, soil moisture content, cryogenic structure and depth of seasonal thaw were also obtained from 15 pits located in differing altitudinal levels and exposures. At two further sites, ground temperatures measurements at depths of 0, 2, 5, 10, 15, 20 and 40 cm were taken every hour during daylight hours every 5 days over a two year period. Air temperature, wind velocity and duration of daylight were measured at the same time as the ground temperature measurements. These data are presented on the CAPS Version 1.0 CD-ROM, June 1998.
Active-Layer and Permafrost Temperatures, Soendre Stroemfjord, Greenland, Version 1
This data set contains active-layer and permafrost temperatures from two stations in Soendre Stroemfjord, Greenland. Snow depth and snow extent were also recorded. Thermometers at Station A (67 deg N, 50.8 deg W, 50 m asl) recorded temperatures once a day from September 1967 to February 1976. Thermometers at Station B (67 deg N, 50.8 deg W, 38 m asl) recorded temperatures once a day from September 1967 to August 1970; however, only bi-weekly averages are given for Station B. Data are in tab-delimited ASCII text format and are available via FTP.
Permafrost Map for Northwestern Canada (Mackenzie Region), Version 1
The Permafrost Map for Northwestern Canada (Mackenzie Region) is a digital version of the 1:1,000,000 map produced by Heginbottom and Radburn [Heginbottom, J.A. and Radburn, L.K. (compilers) 1992. Permafrost and ground ice conditions of northwestern Canada; Geological Survey of Canada, Map 1691A, scale 1:1 000 000.] The map provides information on permafrost distribution and ground ice conditions in the Mackenzie Region of northwestern Canada. The data set comprises three data layers: maps of permafrost zones, rivers, and lakes. The map themes (layers) are in the ESRI Shapefile spatial data format (ArcView files). The permafrost map codes continuous, discontinuous, intermediate, sporadic, and isolated permafrost, and glaciers. Data are available via ftp
Schefferville Permafrost Temperature Database, Version 1
This data set consists of ground temperature data from 192 boreholes in the area of Schefferville, Quebec (54°48'N, 66°50'W), located within the discontinuous permafrost zone. Temperature cables were installed at the Barney, Fleming, Knox mine, Timmins, Ferriman, Howse, Lance, Pinx, Red and Star ore deposits. Borehole depths ranged from 4 to 137 m, with the majority of boreholes being between 25 and 125 m deep. Data are provided for the period between 1957 to 1982. The length of record varies from only one temperature record to records greater than 10 years in length, with the longest record being 16 years long. The data are provided in both an MS Access database and tab-delimited ASCII formats. The database consists of two tables: one which contains information for individual boreholes, such as location and length of record, and a second table that contains the ground temperature data for all boreholes. The two tables are linked by a unique borehole site number. Data are available via ftp..
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