TY - JOUR
T1 - Global forest carbon uptake due to nitrogen and phosphorus deposition from 1850 to 2100
AU - Wang, Rong
AU - Goll, Daniel
AU - Balkanski, Yves
AU - Hauglustaine, Didier
AU - Boucher, Olivier
AU - Ciais, Philippe
AU - Janssens, Ivan
AU - Penuelas, Josep
AU - Guenet, Bertrand
AU - Sardans, Jordi
AU - Bopp, Laurent
AU - Vuichard, Nicolas
AU - Zhou, Feng
AU - Li, Bengang
AU - Piao, Shilong
AU - Peng, Shushi
AU - Huang, Ye
AU - Tao, Shu
PY - 2017/11/1
Y1 - 2017/11/1
N2 - © 2017 John Wiley & Sons Ltd Spatial patterns and temporal trends of nitrogen (N) and phosphorus (P) deposition are important for quantifying their impact on forest carbon (C) uptake. In a first step, we modeled historical and future change in the global distributions of the atmospheric deposition of N and P from the dry and wet deposition of aerosols and gases containing N and P. Future projections were compared between two scenarios with contrasting aerosol emissions. Modeled fields of N and P deposition and P concentration were evaluated using globally distributed in situ measurements. N deposition peaked around 1990 in European forests and around 2010 in East Asian forests, and both increased sevenfold relative to 1850. P deposition peaked around 2010 in South Asian forests and increased 3.5-fold relative to 1850. In a second step, we estimated the change in C storage in forests due to the fertilization by deposited N and P (∆C ν dep ), based on the retention of deposited nutrients, their allocation within plants, and C:N and C:P stoichiometry. ∆C ν dep for 1997–2013 was estimated to be 0.27 ± 0.13 Pg C year −1 from N and 0.054 ± 0.10 Pg C year −1 from P, contributing 9% and 2% of the terrestrial C sink, respectively. Sensitivity tests show that uncertainty of ∆C ν dep was larger from P than from N, mainly due to uncertainty in the fraction of deposited P that is fixed by soil. ∆C Pdep was exceeded by ∆C Ndep over 1960–2007 in a large area of East Asian and West European forests due to a faster growth in N deposition than P. Our results suggest a significant contribution of anthropogenic P deposition to C storage, and additional sources of N are needed to support C storage by P in some Asian tropical forests where the deposition rate increased even faster for P than for N.
AB - © 2017 John Wiley & Sons Ltd Spatial patterns and temporal trends of nitrogen (N) and phosphorus (P) deposition are important for quantifying their impact on forest carbon (C) uptake. In a first step, we modeled historical and future change in the global distributions of the atmospheric deposition of N and P from the dry and wet deposition of aerosols and gases containing N and P. Future projections were compared between two scenarios with contrasting aerosol emissions. Modeled fields of N and P deposition and P concentration were evaluated using globally distributed in situ measurements. N deposition peaked around 1990 in European forests and around 2010 in East Asian forests, and both increased sevenfold relative to 1850. P deposition peaked around 2010 in South Asian forests and increased 3.5-fold relative to 1850. In a second step, we estimated the change in C storage in forests due to the fertilization by deposited N and P (∆C ν dep ), based on the retention of deposited nutrients, their allocation within plants, and C:N and C:P stoichiometry. ∆C ν dep for 1997–2013 was estimated to be 0.27 ± 0.13 Pg C year −1 from N and 0.054 ± 0.10 Pg C year −1 from P, contributing 9% and 2% of the terrestrial C sink, respectively. Sensitivity tests show that uncertainty of ∆C ν dep was larger from P than from N, mainly due to uncertainty in the fraction of deposited P that is fixed by soil. ∆C Pdep was exceeded by ∆C Ndep over 1960–2007 in a large area of East Asian and West European forests due to a faster growth in N deposition than P. Our results suggest a significant contribution of anthropogenic P deposition to C storage, and additional sources of N are needed to support C storage by P in some Asian tropical forests where the deposition rate increased even faster for P than for N.
KW - aerosol
KW - forest carbon sink
KW - nitrogen deposition
KW - nutrient limitation
KW - nutrient retention
KW - phosphorus deposition
KW - stoichiometry
UR - https://ddd.uab.cat/record/176211
U2 - https://doi.org/10.1111/gcb.13766
DO - https://doi.org/10.1111/gcb.13766
M3 - Article
VL - 23
SP - 4854
EP - 4872
JO - Global Change Biology
JF - Global Change Biology
SN - 1354-1013
IS - 11
ER -