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Chloroform (CHCl 3 ) Emissions From Coastal Antarctic Tundra
Author(s) -
Zhang Wanying,
Jiao Yi,
Zhu Renbin,
Rhew Robert C.,
Sun Bowen,
Dai Haitao
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2021gl093811
Subject(s) - tundra , environmental science , organic matter , environmental chemistry , chloroform , halide , soil water , arctic , atmospheric sciences , chemistry , ecology , oceanography , geology , soil science , biology , inorganic chemistry , chromatography
In this study, the first in situ static‐chamber measurements were conducted at coastal Antarctica tundra for CHCl 3 fluxes, which showed that CHCl 3 was naturally emitted from the Antarctic tundra at 35 ± 27 nmol m −2 d −1 , comparable to other reported important natural sources. Significantly, enhanced CHCl 3 emission rates (66 ± 20 nmol m −2 d −1 ) were observed from ornithogenic soil on the island populated with penguins, which was rich in organic matter and halides coming from penguin excrements. It is estimated that Antarctic tundra emits up to 0.1 Gg CHCl 3 per year, which is an important source for regional atmospheric CHCl 3 . Laboratory‐based incubations suggested that organic carbon and chlorine inputs by penguins may stimulate O 2 dependent microbial‐mediated CHCl 3 emission from the Antarctic tundra, and all tundra soils showed the maximum CHCl 3 emission at 4°C. The strength of this CHCl 3 source is also expected to change in response to Antarctic warming.