Title: Global Convergence in the Temperature Sensitivity of Respiration at Ecosystem Level
Authors: MAHECHA Miguel D.REICHSTEIN MarkusCARVALHAIS NunoLASSLOP GittaLANGE HolgerSENEVIRATNE Sonia I.VARGAS RodrigoAMMANN ChristofARAIN Altaf M.CESCATTI AlessandroJANSSENS Ivan A.MIGLIAVACCA MircoMONTAGNANI LeonardoRICHARDSON Andrew D.
Citation: SCIENCE vol. 329 no. 5993 p. 838-840
Publisher: AMER ASSOC ADVANCEMENT SCIENCE
Publication Year: 2010
JRC N°: JRC59032
ISSN: 0036-8075
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC59032
DOI: 10.1126/science.1189587
Type: Articles in Journals
Abstract: The respiratory release of CO2 from the land surface is a major flux in the global carbon cycle, antipodal to photosynthetic CO2 uptake. Understanding the sensitivity of respiratory processes to temperature is central for quantifying the climate¿carbon cycle feedback. Here, we approximate the sensitivity of terrestrial ecosystem respiration to air temperature (Q10) across 60 FLUXNET sites using a methodology that circumvents confounding effects. Contrary to previous findings, our results suggest that Q10 is independent of mean annual temperature, does not differ among biomes, and is confined to values around 1.4(0.1). The strong relation between photosynthesis and respiration, instead, is highly variable among sites. Overall, the results partly explain a less pronounced climate¿carbon cycle feedback than suggested by current carbon cycle climate models.
JRC Institute:Institute for Environment and Sustainability

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