Autumnal fluxes of CH4 and CO2 from Mediterranean reed wetland based on eddy covariance and chamber methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F19%3A00507699" target="_blank" >RIV/86652079:_____/19:00507699 - isvavai.cz</a>

Výsledek na webu

<a href="https://reader.elsevier.com/reader/sd/pii/S0341816219303339?token=281F8D7076B865CD51B18DE9BEFC3B29D586F6B7F0A6140DFD681510EA8EE09EAC01896C5D925C1B005746F9519EF8FA" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0341816219303339?token=281F8D7076B865CD51B18DE9BEFC3B29D586F6B7F0A6140DFD681510EA8EE09EAC01896C5D925C1B005746F9519EF8FA</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.catena.2019.104191" target="_blank" >10.1016/j.catena.2019.104191</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Autumnal fluxes of CH4 and CO2 from Mediterranean reed wetland based on eddy covariance and chamber methods

Popis výsledku v původním jazyce

Atmospheric methane (CH4) and carbon dioxide (CO2) concentration have been increasing during the last several centuries due to changes in agricultural practices and other anthropogenic activities. Both greenhouse gases (GHGs), have a significant impact on the Earth's radiative balance. GHG effluxes of CH4 and CO2 were measured in a warm Mediterranean wetland in south of Spain. The dominant vegetation cover at the site was by common reed (Phragmites australis) and the measurements were done during short measurement campaign in early autumn 2015. Gas-flux measurements were carried out applying two methods, the eddy covariance (EC) technique and the chamber method (CM). These two methods representing different ecosystem subsets, with EC representing the plant/ecosystem subset and CM representing the water/soil subset. In our measurement campaigns using CM, CH4 emissions ranged from 7.2 to 17.7 mg CH4-C m−2 d−1 and CO2 emissions from 0.53 to 1.27 g CO2-C m−2 d−1. When using EC, the average fluxes of CH4 and CO2 were 31.4 mg CH4-C m−2 d−1 and 1.32 g CO2-C m−2 d−1, respectively. Relationships between gas fluxes (CO2 and CH4) measured by the EC method were quite closely correlated with photosynthetically active solar radiation. Our results showed higher CO2 carbon released from the water/soil ecosystem subset in comparison to plants subset. On the other hand, the estimated CH4 carbon balance for the plant/ecosystem subset was about twice that of the water/soil ecosystem subset. Overall, we showed that EC and CM methods cover different areas making EC advantageous for integrated measurements over larger areas, while the CM approach is suitable for local and spatially well constrained flux measurements. Hence, EC and CM methods should be seen as complementary rather than fully comparable methods.

Název v anglickém jazyce

Autumnal fluxes of CH4 and CO2 from Mediterranean reed wetland based on eddy covariance and chamber methods

Popis výsledku anglicky

Atmospheric methane (CH4) and carbon dioxide (CO2) concentration have been increasing during the last several centuries due to changes in agricultural practices and other anthropogenic activities. Both greenhouse gases (GHGs), have a significant impact on the Earth's radiative balance. GHG effluxes of CH4 and CO2 were measured in a warm Mediterranean wetland in south of Spain. The dominant vegetation cover at the site was by common reed (Phragmites australis) and the measurements were done during short measurement campaign in early autumn 2015. Gas-flux measurements were carried out applying two methods, the eddy covariance (EC) technique and the chamber method (CM). These two methods representing different ecosystem subsets, with EC representing the plant/ecosystem subset and CM representing the water/soil subset. In our measurement campaigns using CM, CH4 emissions ranged from 7.2 to 17.7 mg CH4-C m−2 d−1 and CO2 emissions from 0.53 to 1.27 g CO2-C m−2 d−1. When using EC, the average fluxes of CH4 and CO2 were 31.4 mg CH4-C m−2 d−1 and 1.32 g CO2-C m−2 d−1, respectively. Relationships between gas fluxes (CO2 and CH4) measured by the EC method were quite closely correlated with photosynthetically active solar radiation. Our results showed higher CO2 carbon released from the water/soil ecosystem subset in comparison to plants subset. On the other hand, the estimated CH4 carbon balance for the plant/ecosystem subset was about twice that of the water/soil ecosystem subset. Overall, we showed that EC and CM methods cover different areas making EC advantageous for integrated measurements over larger areas, while the CM approach is suitable for local and spatially well constrained flux measurements. Hence, EC and CM methods should be seen as complementary rather than fully comparable methods.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/LO1415" target="_blank" >LO1415: CzechGlobe 2020 - Rozvoj Centra pro studium dopadů globální změny klimatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catena

ISSN

0341-8162

e-ISSN

—

Svazek periodika

DEC 2019

Číslo periodika v rámci svazku

183

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

104191

Kód UT WoS článku

000488417700022

EID výsledku v databázi Scopus

2-s2.0-85070287165