We observed the decrease of aboveground productivity with forest-marsh transect. Degraded ghost forest had similar DOC concentrations with freshwater wetlands. Highest average current was from the in-situ MFC in the degraded ghost forest. Lowest CH4 and CO2 fluxes were observed in the degraded ghost forest. Degraded ghost forests have unique ecological and biogeochemical characteristics.
This is the first study measuring CCl4 fluxes from the Antarctic tundra. Antarctic tundra soil is a small natural sink of atmospheric CCl4. It is estimated Antarctic tundra degrades about 2.4 metric tons CCl4 yr−1. CCl4 degradation in Antarctic tundra is likely abiotic and dependent on O2.Results supports the viewpoint CCl4 soil sink is smaller than previously thought.
The widespread application of copper(II) pesticides in agriculture and the discharge of anthropogenic copper(II) to the oceans may account for part of the missing sources of CH3Br and CH3Cl.
In this study, the first in situ static-chamber measurements were conducted at coastal Antarctica tundra for CHCl3 fluxes, which showed that CHCl3 was naturally emitted from the Antarctic tundra at 35 ± 27 nmol m−2 d−1, comparable to other reported important natural sources.
This study quantifies methyl halide emissions from cultivated rapeseed (Brassica napus, cultivar: Empire), based on life cycle measurements and normalized to seed production.
our findings point to the strong emission potential of a suite of VHOCs from saline soils and salt lakes and call for additional studies of emission rates and mechanisms of VHOCs from saline soils and salt lakes.
Sea level rise and more frequent storm surges derived from global climate change, in the long term, may increase emissions of chloroform from coastal degraded forested wetlands and of methyl halides if salt marshes expand, with potential impacts for stratospheric ozone depletion.