Maximizing the information obtained from chamber-based greenhouse gas exchange measurements in remote areas

Haifa Debouk, Núria Altimir, Maria-Teresa Sebastià

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Measurements of greenhouse gas (GHG) fluxes, particularly methane (CH4) and nitrous oxide (N2O) in mountain ecosystems are scarce due to the complexity and unpredictable behavior of these gases, in addition to the remoteness of these ecosystems. In this context, we measured CO2, CH4, and N2O fluxes in four semi-natural pastures in the Pyrenees to investigate their magnitude and range of variability. Our interest was to study GHG phenomena at the patch-level, therefore we chose to measure the gas-exchange using a combination of a gas analyzer and manual chambers. The analyzer used is a photoacoustic field gas-monitor that allows multi-gas instantaneous measurements. After implementing quality control and corrections, data was of variable quality. We tackled this by categorizing data as to providing quantitative or only qualitative information:•50% and 59% of all CH4 and N2O data, respectively, provided quantitative information above the detection limit.•We chose not to discard data providing only qualitative information, because they identify highest- and lowest-flux peak periods and indicate the variability of the fluxes, along different altitudes and under different climatic conditions.•We chose not to give fluxes below detection limit a quantitative value but to acknowledge them as values identifying periods with low fluxes.
Original languageEnglish
JournalMethodsX
Volume5
Pages (from-to)973–983
Number of pages11
ISSN2215-0161
DOIs
Publication statusPublished - 22 Aug 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • Soil-atmosphere multi-gas exchange in remote areas
  • CO
  • CH
  • NO
  • detection limit
  • quantitative and qualitative data
  • 1171 Geosciences

Cite this

@article{e5d86ec2cd8746b3bc21542d1918b94a,
title = "Maximizing the information obtained from chamber-based greenhouse gas exchange measurements in remote areas",
abstract = "Measurements of greenhouse gas (GHG) fluxes, particularly methane (CH4) and nitrous oxide (N2O) in mountain ecosystems are scarce due to the complexity and unpredictable behavior of these gases, in addition to the remoteness of these ecosystems. In this context, we measured CO2, CH4, and N2O fluxes in four semi-natural pastures in the Pyrenees to investigate their magnitude and range of variability. Our interest was to study GHG phenomena at the patch-level, therefore we chose to measure the gas-exchange using a combination of a gas analyzer and manual chambers. The analyzer used is a photoacoustic field gas-monitor that allows multi-gas instantaneous measurements. After implementing quality control and corrections, data was of variable quality. We tackled this by categorizing data as to providing quantitative or only qualitative information:•50{\%} and 59{\%} of all CH4 and N2O data, respectively, provided quantitative information above the detection limit.•We chose not to discard data providing only qualitative information, because they identify highest- and lowest-flux peak periods and indicate the variability of the fluxes, along different altitudes and under different climatic conditions.•We chose not to give fluxes below detection limit a quantitative value but to acknowledge them as values identifying periods with low fluxes.",
keywords = "Soil-atmosphere multi-gas exchange in remote areas, CO, CH, NO, detection limit, quantitative and qualitative data, 1171 Geosciences",
author = "Haifa Debouk and N{\'u}ria Altimir and Maria-Teresa Sebasti{\`a}",
year = "2018",
month = "8",
day = "22",
doi = "10.1016/j.mex.2018.07.021",
language = "English",
volume = "5",
pages = "973–983",
journal = "MethodsX",
issn = "2215-0161",
publisher = "Elsevier B. V.",

}

Maximizing the information obtained from chamber-based greenhouse gas exchange measurements in remote areas. / Debouk, Haifa; Altimir, Núria; Sebastià, Maria-Teresa.

In: MethodsX, Vol. 5, 22.08.2018, p. 973–983.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Maximizing the information obtained from chamber-based greenhouse gas exchange measurements in remote areas

AU - Debouk, Haifa

AU - Altimir, Núria

AU - Sebastià, Maria-Teresa

PY - 2018/8/22

Y1 - 2018/8/22

N2 - Measurements of greenhouse gas (GHG) fluxes, particularly methane (CH4) and nitrous oxide (N2O) in mountain ecosystems are scarce due to the complexity and unpredictable behavior of these gases, in addition to the remoteness of these ecosystems. In this context, we measured CO2, CH4, and N2O fluxes in four semi-natural pastures in the Pyrenees to investigate their magnitude and range of variability. Our interest was to study GHG phenomena at the patch-level, therefore we chose to measure the gas-exchange using a combination of a gas analyzer and manual chambers. The analyzer used is a photoacoustic field gas-monitor that allows multi-gas instantaneous measurements. After implementing quality control and corrections, data was of variable quality. We tackled this by categorizing data as to providing quantitative or only qualitative information:•50% and 59% of all CH4 and N2O data, respectively, provided quantitative information above the detection limit.•We chose not to discard data providing only qualitative information, because they identify highest- and lowest-flux peak periods and indicate the variability of the fluxes, along different altitudes and under different climatic conditions.•We chose not to give fluxes below detection limit a quantitative value but to acknowledge them as values identifying periods with low fluxes.

AB - Measurements of greenhouse gas (GHG) fluxes, particularly methane (CH4) and nitrous oxide (N2O) in mountain ecosystems are scarce due to the complexity and unpredictable behavior of these gases, in addition to the remoteness of these ecosystems. In this context, we measured CO2, CH4, and N2O fluxes in four semi-natural pastures in the Pyrenees to investigate their magnitude and range of variability. Our interest was to study GHG phenomena at the patch-level, therefore we chose to measure the gas-exchange using a combination of a gas analyzer and manual chambers. The analyzer used is a photoacoustic field gas-monitor that allows multi-gas instantaneous measurements. After implementing quality control and corrections, data was of variable quality. We tackled this by categorizing data as to providing quantitative or only qualitative information:•50% and 59% of all CH4 and N2O data, respectively, provided quantitative information above the detection limit.•We chose not to discard data providing only qualitative information, because they identify highest- and lowest-flux peak periods and indicate the variability of the fluxes, along different altitudes and under different climatic conditions.•We chose not to give fluxes below detection limit a quantitative value but to acknowledge them as values identifying periods with low fluxes.

KW - Soil-atmosphere multi-gas exchange in remote areas

KW - CO

KW - CH

KW - NO

KW - detection limit

KW - quantitative and qualitative data

KW - 1171 Geosciences

U2 - 10.1016/j.mex.2018.07.021

DO - 10.1016/j.mex.2018.07.021

M3 - Article

VL - 5

SP - 973

EP - 983

JO - MethodsX

JF - MethodsX

SN - 2215-0161

ER -