30 research outputs found
Technical note: Skirt chamber – an open dynamic method for the rapid and minimally intrusive measurement of greenhouse gas emissions from peatlands
We present a reliable and robust open dynamic chamber for
measuring greenhouse gas exchange in peatlands with minimal disturbance of
the ground. This chamber, called the “skirt chamber”, is based on a
transparent plastic film placed above an open frame made of sparse
interwoven wires and expanded around the base of the chamber below a steel
chain that ensures contact to the ground, avoiding damage, trenching, and
cutting vegetation. Gas exchange is determined using a portable gas analyzer
from a mass balance in which the imperfect sealing of the chamber to the
ground is quantified through the injection of a methane pulse. The method was
tested on a pristine peatland dominated by Sphagnum magellanicum located on Navarino Island in
the subantarctic Magellanic ecoregion in Chile. Our results indicate that
the skirt chamber allowed the determination of methane fluxes and ecosystem
respiration in about 20 min, with a limit of detection of 0.185 mg
CH4 m−2 h−1 and 173 mg CO2 m−2 h−1,
respectively. We conclude that the skirt chamber is a minimally intrusive,
fast, portable, and inexpensive method that allows the quantification of
greenhouse gas emissions with high spatial resolution in remote locations
and without delay.</p
Denitrification coupled with methane anoxic oxidation and microbial community involved identification
Ice cover on lake Kitiesh
Movie showing the ice layer covering lake Kitiesh (Fildes Peninsula, King George Island; 62.1942, -58.9640)
Supplementary material: Mobile open dynamic chamber measurement of methane macroseeps in lakes
Supplementary material of the article "Mobile open dynamic chamber measurement of methane macroseeps in lakes
Lake Kitiesh 8.5 m
Movie showing the bottom of lake Kitiesh (Fildes Peninsula, King George Island, -62.1942; -58.9640), on November 28th, 2017
Esieh lake seepage HESS
Movie showing intense ebullition on Esieh lake, in support to "Mobile open dynamic chamber measurement of methane macroseeps in lakes
Ice cover on lake Kitiesh
Movie showing the ice layer covering lake Kitiesh (Fildes Peninsula, King George Island; 62.1942, -58.9640)
MOD chamber HESS data
Data of Figures presented in "Mobile open dynamic chamber measurement of methane macroseeps in lakes
Supplementary material: Mobile open dynamic chamber measurement of methane macroseeps in lakes
Supplementary material of the article "Mobile open dynamic chamber measurement of methane macroseeps in lakes
Lake Kitiesh 8.5 m
Movie showing the bottom of lake Kitiesh (Fildes Peninsula, King George Island, -62.1942; -58.9640), on November 28th, 2017