Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F16%3A43890946" target="_blank" >RIV/60076658:12310/16:43890946 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.nature.com/nclimate/journal/v6/n10/full/nclimate3054.html" target="_blank" >http://www.nature.com/nclimate/journal/v6/n10/full/nclimate3054.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/NCLIMATE3054" target="_blank" >10.1038/NCLIMATE3054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils

Popis výsledku v původním jazyce

Increasing temperatures in northern high latitudes are causing permafrost to thaw(1), making large amounts of previously frozen organic matter vulnerable to microbial decomposition(2). Permafrost thaw also creates a fragmented landscape of drier and wetter soil conditions(3,4) that determine the amount and form (carbon dioxide (CO2), or methane (CH4)) of carbon (C) released to the atmosphere. The rate and form of C release control the magnitude of the permafrost C feedback, so their relative contribution with a warming climate remains unclear(5,6). We quantified the effect of increasing temperature and changes from aerobic to anaerobic soil conditions using 25 soil incubation studies from the permafrost zone. Here we show, using two separate meta-analyses, that a 10 degrees C increase in incubation temperature increased C release by a factor of 2.0 (95% confidence interval (CI), 1.8 to 2.2). Under aerobic incubation conditions, soils released 3.4 (95% CI, 2.2 to 5.2) times more C than under anaerobic conditions. Even when accounting for the higher heat trapping capacity of CH4, soils released 2.3 (95% CI, 1.5 to 3.4) times more C under aerobic conditions. These results imply that permafrost ecosystems thawing under aerobic conditions and releasing CO2 will strengthen the permafrost C feedback more than waterlogged systems releasing CO2 and CH4 for a given amount of C.

Název v anglickém jazyce

Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils

Popis výsledku anglicky

Increasing temperatures in northern high latitudes are causing permafrost to thaw(1), making large amounts of previously frozen organic matter vulnerable to microbial decomposition(2). Permafrost thaw also creates a fragmented landscape of drier and wetter soil conditions(3,4) that determine the amount and form (carbon dioxide (CO2), or methane (CH4)) of carbon (C) released to the atmosphere. The rate and form of C release control the magnitude of the permafrost C feedback, so their relative contribution with a warming climate remains unclear(5,6). We quantified the effect of increasing temperature and changes from aerobic to anaerobic soil conditions using 25 soil incubation studies from the permafrost zone. Here we show, using two separate meta-analyses, that a 10 degrees C increase in incubation temperature increased C release by a factor of 2.0 (95% confidence interval (CI), 1.8 to 2.2). Under aerobic incubation conditions, soils released 3.4 (95% CI, 2.2 to 5.2) times more C than under anaerobic conditions. Even when accounting for the higher heat trapping capacity of CH4, soils released 2.3 (95% CI, 1.5 to 3.4) times more C under aerobic conditions. These results imply that permafrost ecosystems thawing under aerobic conditions and releasing CO2 will strengthen the permafrost C feedback more than waterlogged systems releasing CO2 and CH4 for a given amount of C.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Nature Climate Change

ISSN

1758-678X

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

950-953

Kód UT WoS článku

000388292800019

EID výsledku v databázi Scopus

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