In:
Earth System Science Data, Copernicus GmbH, Vol. 14, No. 9 ( 2022-09-01), p. 3947-3959
Abstract:
Abstract. Under a pronounced climate warming, permafrost has been degrading
in most areas globally, but it is still unclear in the northwestern part of
the Da Xing'anling Mountains, Northeast China. According to a 10-year observation of permafrost and active-layer temperatures, the multi-year
average of mean annual ground temperatures at 20 m was −2.83, −0.94,
−0.80, −0.70, −0.60, and −0.49 ∘C, respectively, at boreholes Gen'he4 (GH4), Mangui3 (MG3), Mangui1 (MG1), Mangui2 (MG2), Gen'he5 (GH5),
and Yituli'he2 (YTLH2), with the depths of the permafrost table varying from 1.1 to 7.0 m. Ground cooling at shallow depths has been detected, resulting in
declining thaw depths in Yituli'he during 2009–2020, possibly due to
relatively stable mean positive air temperature and declining snow cover and a dwindling local population. In most study areas (e.g., Mangui and Gen'he),
permafrost warming is particularly pronounced at larger depths (even at 80 m). These results can provide important information for regional development
and engineering design and maintenance and also provide a long-term ground temperature dataset for the validation of models relevant to the thermal
dynamics of permafrost in the Da Xing'anling Mountains. All of the datasets
are published through the National Tibetan Plateau Data Center (TPDC), and
the link is https://doi.org/10.11888/Geocry.tpdc.271752 (Chang,
2021).
Type of Medium:
Online Resource
ISSN:
1866-3516
DOI:
10.5194/essd-14-3947-2022
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2022
detail.hit.zdb_id:
2475469-9
