Global Convergence in the Temperature Sensitivity of Respiration at Ecosystem Level
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.
MAHECHA Miguel D.;
REICHSTEIN Markus;
CARVALHAIS Nuno;
LASSLOP Gitta;
LANGE Holger;
SENEVIRATNE Sonia I.;
VARGAS Rodrigo;
AMMANN Christof;
ARAIN Altaf M.;
CESCATTI Alessandro;
JANSSENS Ivan A.;
MIGLIAVACCA Mirco;
MONTAGNANI Leonardo;
RICHARDSON Andrew D.;
2010-12-17
AMER ASSOC ADVANCEMENT SCIENCE
JRC59032
0036-8075,
https://publications.jrc.ec.europa.eu/repository/handle/JRC59032,
10.1126/science.1189587,
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