Recent decrease of the impact of tropical temperature on the carbon cycle linked to increased precipitation
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Recent decrease of the impact of tropical temperature on the carbon cycle linked to increased precipitation. / Zhang, Wenmin; Schurgers, Guy; Peñuelas, Josep; Fensholt, Rasmus; Yang, Hui; Tang, Jing; Tong, Xiaowei; Ciais, Philippe; Brandt, Martin.
In: Nature Communications, Vol. 14, No. 1, 965, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Recent decrease of the impact of tropical temperature on the carbon cycle linked to increased precipitation
AU - Zhang, Wenmin
AU - Schurgers, Guy
AU - Peñuelas, Josep
AU - Fensholt, Rasmus
AU - Yang, Hui
AU - Tang, Jing
AU - Tong, Xiaowei
AU - Ciais, Philippe
AU - Brandt, Martin
N1 - Publisher Copyright: © 2023. The Author(s).
PY - 2023
Y1 - 2023
N2 - The atmospheric CO2 growth rate (CGR) variability is largely controlled by tropical temperature fluctuations. The sensitivity of CGR to tropical temperature [Formula: see text] has strongly increased since 1960, but here we show that this trend has ceased. Here, we use the long-term CO2 records from Mauna Loa and the South Pole to compute CGR, and show that [Formula: see text] increased by 200% from 1960-1979 to 1979-2000 but then decreased by 117% from 1980-2001 to 2001-2020, almost returning back to the level of the 1960s. Variations in [Formula: see text] are significantly correlated with changes in precipitation at a bi-decadal scale. These findings are further corroborated by results from a dynamic vegetation model, collectively suggesting that increases in precipitation control the decreased [Formula: see text] during recent decades. Our results indicate that wetter conditions have led to a decoupling of the impact of the tropical temperature variation on the carbon cycle.
AB - The atmospheric CO2 growth rate (CGR) variability is largely controlled by tropical temperature fluctuations. The sensitivity of CGR to tropical temperature [Formula: see text] has strongly increased since 1960, but here we show that this trend has ceased. Here, we use the long-term CO2 records from Mauna Loa and the South Pole to compute CGR, and show that [Formula: see text] increased by 200% from 1960-1979 to 1979-2000 but then decreased by 117% from 1980-2001 to 2001-2020, almost returning back to the level of the 1960s. Variations in [Formula: see text] are significantly correlated with changes in precipitation at a bi-decadal scale. These findings are further corroborated by results from a dynamic vegetation model, collectively suggesting that increases in precipitation control the decreased [Formula: see text] during recent decades. Our results indicate that wetter conditions have led to a decoupling of the impact of the tropical temperature variation on the carbon cycle.
U2 - 10.1038/s41467-023-36727-2
DO - 10.1038/s41467-023-36727-2
M3 - Journal article
C2 - 36810352
AN - SCOPUS:85148548244
VL - 14
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 965
ER -
ID: 337694406