In:
Earth System Science Data, Copernicus GmbH, Vol. 11, No. 1 ( 2019-02-22), p. 261-299
Kurzfassung:
Abstract. Most of the world's permafrost is located in the
Arctic, where its frozen organic carbon content makes it a potentially
important influence on the global climate system. The Arctic climate appears
to be changing more rapidly than the lower latitudes, but observational data
density in the region is low. Permafrost thaw and carbon release into the
atmosphere, as well as snow cover changes, are positive feedback mechanisms
that have the potential for climate warming. It is therefore particularly
important to understand the links between the energy balance, which can vary
rapidly over hourly to annual timescales, and permafrost conditions, which
changes slowly on decadal to centennial timescales. This requires long-term
observational data such as that available from the Samoylov research site in
northern Siberia, where meteorological parameters, energy balance, and
subsurface observations have been recorded since 1998. This paper presents
the temporal data set produced between 2002 and 2017, explaining the
instrumentation, calibration, processing, and data quality control.
Furthermore, we present a merged data set of the parameters, which were
measured from 1998 onwards. Additional data include a high-resolution digital
terrain model (DTM) obtained from terrestrial lidar laser scanning. Since the
data provide observations of temporally variable parameters that influence
energy fluxes between permafrost, active-layer soils, and the atmosphere
(such as snow depth and soil moisture content), they are suitable for
calibrating and quantifying the dynamics of permafrost as a component in
earth system models. The data also include soil properties beneath different
microtopographic features (a polygon centre, a rim, a slope, and a trough),
yielding much-needed information on landscape heterogeneity for use in land
surface modelling. For the record from 1998 to 2017, the average mean annual air temperature
was −12.3 ∘C, with mean monthly temperature of the warmest month
(July) recorded as 9.5 ∘C and for the coldest month (February)
−32.7 ∘C. The average annual rainfall was 169 mm. The depth of
zero annual amplitude is at 20.75 m. At this depth, the temperature has
increased from −9.1 ∘C in 2006 to −7.7 ∘C in 2017. The presented data are freely available through the PANGAEA
(https://doi.org/10.1594/PANGAEA.891142) and Zenodo
(https://zenodo.org/record/2223709, last access: 6 February 2019) websites.
Materialart:
Online-Ressource
ISSN:
1866-3516
DOI:
10.5194/essd-11-261-2019
DOI:
10.5194/essd-11-261-2019-corrigendum
Sprache:
Englisch
Verlag:
Copernicus GmbH
Publikationsdatum:
2019
ZDB Id:
2475469-9
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