General Information

Created: 2013-11-22 10:34:17
Modified: 2022-01-24 09:39:36

Active: Yes
Site:Samoylov (Lena River Delta)
GTN-P:RU 150 DE04
Responsible Countries: Russia, Germany,
Timezone:UTC/GMT +09:00 hours
Vegetation Type:Tundra
Responsible Person:Julia Boike

The  borehole was drilled into the permafrost during the spring of 2006 and a temperature sensor chain installed in August 2006, with 24 temperature sensors down to a depth of 26.75m. The temperature sensor chain was inserted into a close-fitting PVC tube to allow reinstallation and recalibration of sensors. The absolute accuracy of the temperature sensors is ±0.005 °C across the range from −40 °C to 35 °C (RBR Ltd.). A second 5 cm (outside diameter) PVC tube was inserted into the borehole to permit additional (geophysical) measurements to be made in the future. The remaining air space in the borehole was backfilled with dry sand.

Continuous measurements since 24.08.2006

Sensor depth: at surface: 0.00m, under surface 0.75/1.75/2.75/3.75/4.75/5.75/6.75/7.75/8.75/9.75/10.75/11.75/12.75/13.75/14.75/15.75/16.75/17.75/18.75/20.75/22.75/24.75/26.75m

year (YYYY) period - start (YYYY-MM-DD) period - end (YYYY-MM-DD) Depth     (m) T value  (°C)
2006 2006-08-24 2006-12-31 20.75 -9.1
2007 2007-01-01 2007-12-31 20.75 -9
2008 2008-01-01 2008-09-20 20.75 -9
2009 2009-04-09 2009-12-31 20.75 -8.8
2010 2010-01-01 2010-12-31 20.75 -8.8
2011 2011-01-01 2011-12-31 20.75 -8.6
2012 2012-01-01 2012-12-31 20.75 -8.4
2013 2013-01-01 2013-12-31 20.75 -8.4
2014 2014-01-01 2014-12-31 20.75 -8.2
2015 2015-01-01 2015-12-31 20.75 -8.1
2016 2016-01-01 2016-12-31 20.75 -7.9
2017 2017-01-01 2017-12-31 20.75 -7.7
2018 2018-01-01 2018-12-31 20.75 -7.4
2019 2019-01-01 2019-12-31 20.75 -7.2
2020 2020-01-01 2020-12-31 20.75 -7.1
2021 2021-01-01 2021-09-20 20.75 -7.0




Depth:27 m
Drilling Angle:90 °
Deepest Sensor:26.75 m
Drilling Method:rotary russian UGB core drill
Date Drilled:01. Jan 2006
Type:Offroad vehicle, Helicopter, River boat
Distance From Road:120000 m
Type:Samoylov Research Station
Distance From Heat:100 m
Other Disturbance:no
Distance From Heat:0 m
Slope:1 °
Aspect:149.3 ┬░
Permafrost Zone:Continuous
Vegetation:Large parts of flood plain are devoid of vegetation. Overgrown parts are characterised by Salix-Equisetum-Alopecurus alpinus community, dominated by willow shrubs, horsetail, Poaceae and Tanacetum bipinnatum. Mosses are very rare, except on the first terrace. Dry tundra is dominated by Hylocomium splendens, with Dryas punctata, Polygonum viviparum, Astragalus frigidus, with willow shrubs and lichens belonging to Hylocomium splendens-Dryas punctatalichen community. The wet tundra's vegetation is of Drepanocladus revolvens-Meesia triquetra-Carex chordorrhiza community (i.e., hydrophilic mosses, Meesia triquetra, Calliergon giganteum), sedge Carex chordorrhiza, marsh cinquefoil, sudetic lousewort. Carex concolor, with the moss species Tomen-typnum nitens, Aulacomnium palustre, and A. turgidum, are common in the Drepanocladus revolvens-Meesia triquetra-Carex chordorrhiza community of wet tundra and Hylocomium splendens-Dryas punctatalichen community of dry tundra.
Hydrology:The polygonal tundra on Samoylov Island forms a highly fragmented land cover pattern consisting of dry polygonal ridges with wet depressed centers, as well as numerous larger water bodies.
Landform:polygonal tundra, wetland Samoylov Island consists of a flood plain in the west and an elevated river terrace in the east that is characterized by polygonal tundra. Dry tundra conforms to moist-herbaceous plant communities (Circumpolar Arctic Vegetation Map) and occurs on polygon ridges, well drained plateaus and elevated polygon centers. Wet tundra is in depressed polygon centers, in water channels and on collapsed ridges.
Lithology:Dystri Turbi-Histic (Gleyic), Gleyi-Turbic Cryosols (loamy)
Morphology:Samoylov Island consists of a flood plain in the west and an elevated river terrace in the east that is characterized by polygonal tundra.
Description:Thaw depth measurements (year started): 2002 Air temp. measurements (year started): 1998 Snow cover measurements (year started): 1998 soil temp. measurements (year started): 1998 soil moisture measurements (year started): 1998
Access Timeseries
Bibliographic References
Boike,J., Kattenstroth,B., Abramova,K., Bornemann,N., Chetverova,A., Fedorova,I., Fröb,K., Grigoriev,M., Grüber,M., Kutzbach,L., Langer,M., Minke,M., Muster,S., Piel,K., Pfeiffer,E.-M., Stoof,G., Westermann,S., Wischnewski,K., Wille,C., and Hubberten,H.-W.: Baseline characteristics of climate, permafrost and land cover from a new permafrost observatory in the Lena River Delta, Siberia (19982011), Biogeosciences, 10, 2105-2128, doi:10.5194/bg-10-2105-2013, 2013

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Longitude:126.475111 °
Latitude:72.369555 °
Elevation:10.99261761 m
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