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A high spatial resolution soil carbon and nitrogen dataset for the northern permafrost region based on circumpolar land cover upscaling
Earth System Science Data ( IF 11.4 ) Pub Date : 2022-09-07 , DOI: 10.5194/essd-14-4095-2022 Juri Palmtag, Jaroslav Obu, Peter Kuhry, Andreas Richter, Matthias B. Siewert, Niels Weiss, Sebastian Westermann, Gustaf Hugelius
Earth System Science Data ( IF 11.4 ) Pub Date : 2022-09-07 , DOI: 10.5194/essd-14-4095-2022 Juri Palmtag, Jaroslav Obu, Peter Kuhry, Andreas Richter, Matthias B. Siewert, Niels Weiss, Sebastian Westermann, Gustaf Hugelius
Soils in the northern high latitudes are a key component in the global
carbon cycle; the northern permafrost region covers 22 % of the Northern
Hemisphere land surface area and holds almost twice as much carbon as the
atmosphere. Permafrost soil organic matter stocks represent an enormous
long-term carbon sink which is in risk of switching to a net source in the
future. Detailed knowledge about the quantity and the mechanisms controlling
organic carbon storage is of utmost importance for our understanding of
potential impacts of and feedbacks on climate change. Here we present a
geospatial dataset of physical and chemical soil properties calculated from
651 soil pedons encompassing more than 6500 samples from 16 different study
areas across the northern permafrost region. The aim of our dataset is to
provide a basis to describe spatial patterns in soil properties, including
quantifying carbon and nitrogen stocks. There is a particular need for
spatially distributed datasets of soil properties, including vertical and
horizontal distribution patterns, for modeling at local, regional, or global
scales. This paper presents this dataset, describes in detail soil sampling;
laboratory analysis, and derived soil geochemical parameters; calculations;
and data clustering. Moreover, we use this dataset to estimate soil organic
carbon and total nitrogen storage estimates in soils in the northern
circumpolar permafrost region (17.9×106 km2) using the European Space Agency's (ESA's) Climate Change Initiative (CCI) global land cover dataset at 300 m
pixel resolution. We estimate organic carbon and total nitrogen stocks on a
circumpolar scale (excluding Tibet) for the 0–100 and 0–300 cm soil depth
to be 380 and 813 Pg for carbon, and 21 and 55 Pg for nitrogen,
respectively. Our organic carbon estimates agree with previous studies, with
most recent estimates of 1000 Pg (−170 to +186 Pg) to 300 cm depth. Two separate datasets are freely available on the Bolin Centre Database repository (https://doi.org/10.17043/palmtag-2022-pedon-1, Palmtag et al., 2022a; and https://doi.org/10.17043/palmtag-2022-spatial-1, Palmtag et al., 2002b).
更新日期:2022-09-07