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Datasets of project "Changing Permafrost in the Arctic and its Global Effects in the 21st Century"

Mostrando recursos 1 - 20 de 22

  1. Carbon and nitrogen lateral fluxes at Kytalyk research site (NE Russia) - year 2012

    van Huissteden, Jacobus (Ko); Belelli Marchesini, Luca; Budishchev, Artem; Gallagher, Angela

  2. Wetland maps including open water extent dynamics based on ENVISAT ASAR WS for Siberia, 2007 and 2008, links to GeoTIFFs

    Reschke, Julia; Bartsch, Annett; Schlaffer, Stefan; Schepaschenko, Dmitry
    Wetlands store large amounts of carbon, and depending on their status and type, they release specific amounts of methane gas to the atmosphere. The connection between wetland type and methane emission has been investigated in various studies and utilized in climate change monitoring and modelling. For improved estimation of methane emissions, land surface models require information such as the wetland fraction and its dynamics over large areas. Existing datasets of wetland dynamics present the total amount of wetland (fraction) for each model grid cell, but do not discriminate the different wetland types like permanent lakes, periodically inundated areas or peatlands....

  3. Remote sensing green-up date from SPOT-VEGETATION data in North Scandinavia (1998-2013), link to GeoTIFF

    Delbart, Nicolas

  4. Remote sensing green-up date from SPOT-VEGETATION data at Herschel Island (1998-2012), link to GeoTIFF

    Delbart, Nicolas

  5. Remote sensing green-up date from SPOT-VEGETATION data at Daring Lake (1998-2012), link to GeoTIFF

    Delbart, Nicolas

  6. Remote sensing green-up date from SPOT-VEGETATION data in North West Siberia (1998-2012), link to GeoTIFF

    Delbart, Nicolas

  7. Remote sensing green-up date from SPOT-VEGETATION data in North East Siberia (1998-2012), link to GeoTIFF

    Delbart, Nicolas

  8. Land surface hydrology from remotely sensed data at PAGE21 sites with links to geotiff images

    Widhalm, Barbara; Högström, Elin; Ressl, Camillo; Trofaier, Anna Maria; Heim, Birgit; Biasi, Christina; Bartsch, Annett

  9. Spring snowmelt and midwinter thaw and refreeze north of 60°N based on Seawinds QuikScat 2000-2009

    Bartsch, Annett
    The scatterometer SeaWinds on QuikSCAT provided regular measurements at Ku-band from 1999 to 2009. Although it was designed for ocean applications, it has been frequently used for the assessment of seasonal snowmelt patterns aside from other terrestrial applications such as ice cap monitoring, phenology and urban mapping. This paper discusses general data characteristics of SeaWinds and reviews relevant change detection algorithms. Depending on the complexity of the method, parameters such as long-term noise and multiple event analyses were incorporated. Temporal averaging is a commonly accepted preprocessing step with consideration of diurnal, multi-day or seasonal averages.

  10. Geomorphological and cryological map of the Brøgger Peninsula, Svalbard, with link to shapefiles

    May, Inga; Boike, Julia

  11. Land Surface Temperature continuous time series from SSM/I passive microwave radiometers, over northern latitudes (Latitudes > 45°N), during summer snow free period (2000-2011), with links to NetCDF files

    André, Cyrille; Ottlé, Catherine; Royer, Alain; Maignan, Fabienne
    Remote sensing instruments are key players to map land surface temperature (LST) at large temporal and spatial scales. In this paper, we present how we combine passive microwave and thermal infrared data to estimate LST during summer snow-free periods over northern high latitudes. The methodology is based on the SSM/I-SSMIS 37 GHz measurements at both vertical and horizontal polarizations on a 25 km × 25 km grid size. LST is retrieved from brightness temperatures introducing an empirical linear relationship between emissivities at both polarizations as described in Royer and Poirier (2010). This relationship is calibrated at pixel scale, using cloud-free...

  12. Geomorphological and Cryological map of Adventdalen, Svalbard

    Härtel, Stefanie; Christiansen, Hanne H

  13. Geomorphological and cryological map of Zackenberg, Greenland

    Härtel, Stefanie; Christiansen, Hanne H

  14. Geomorphological and cryological map of Abisko, Sweden (pdf 3.1 MB)

    Sahlin, E A U; Jonasson, Christer

  15. Geomorphological and cryological map of Kytalyk, Russia, links to shapefiles

    van Huissteden, Jacobus (Ko); Belelli Marchesini, Luca

  16. Stratigraphic map of the Lena Delta, Russia, shapefiles

    Peter, Maria; Langer, Moritz; Boike, Julia; Schwamborn, Georg; Etzelmüller, Bernd; Westermann, Sebastian

  17. CO2 production rates in the Arctic region

    Jørgensen, Christian Juncher; Faucherre, Samuel; Elberling, Bo
    The vulnerability of permafrost carbon to decomposition and greenhouse gas production is a key factor for understanding the potential carbon feedback mechanisms to the atmosphere from thawing permafrost. Northern hemisphere permafrost carbon pools represent approximately 50% of the global subsurface organic carbon pool and are important to the understanding of the global carbon cycle and Arctic carbon climate feedback mechanism. This data report is delivered to WP8 and the rest of the WP3 as part of the milestone MS22: "All laboratory experiments completed". The report is therefore a data report providing input to coming scientific reports on results and interpretation. In this...

  18. CO2 production rates in the Arctic region, anoxic treatment

    Jørgensen, Christian Juncher; Faucherre, Samuel; Elberling, Bo

  19. CO2 production rates in the Arctic region, oxic treatment

    Jørgensen, Christian Juncher; Faucherre, Samuel; Elberling, Bo

  20. Characteristics of sampling sites in the Arctic region

    Jørgensen, Christian Juncher; Faucherre, Samuel; Elberling, Bo

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