Increased soil release of greenhouse gases shrinks terrestrial carbon uptake enhancement under warming

2020 ◽  
Vol 26 (8) ◽  
pp. 4601-4613
Author(s):  
Shuwei Liu ◽  
Yajing Zheng ◽  
Ruoya Ma ◽  
Kai Yu ◽  
Zhaoqiang Han ◽  
...  
Keyword(s):  
Greenhouse Gases ◽  
Carbon Uptake ◽  
Terrestrial Carbon ◽  
Soil Release

scholarly journals Consequences of Considering Carbon–Nitrogen Interactions on the Feedbacks between Climate and the Terrestrial Carbon Cycle

2008 ◽  
Vol 21 (15) ◽  
pp. 3776-3796 ◽  
Author(s):  
Andrei P. Sokolov ◽  
David W. Kicklighter ◽  
Jerry M. Melillo ◽  
Benjamin S. Felzer ◽  
C. Adam Schlosser ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Carbon Cycle ◽  
Carbon Emissions ◽  
Terrestrial Ecosystems ◽  
Co2 Concentration ◽  
Nitrogen Dynamics ◽  
Carbon Uptake ◽  
Terrestrial Carbon ◽  
Surface Warming ◽  
Terrestrial Carbon Cycle

Abstract The impact of carbon–nitrogen dynamics in terrestrial ecosystems on the interaction between the carbon cycle and climate is studied using an earth system model of intermediate complexity, the MIT Integrated Global Systems Model (IGSM). Numerical simulations were carried out with two versions of the IGSM’s Terrestrial Ecosystems Model, one with and one without carbon–nitrogen dynamics. Simulations show that consideration of carbon–nitrogen interactions not only limits the effect of CO2 fertilization but also changes the sign of the feedback between the climate and terrestrial carbon cycle. In the absence of carbon–nitrogen interactions, surface warming significantly reduces carbon sequestration in both vegetation and soil by increasing respiration and decomposition (a positive feedback). If plant carbon uptake, however, is assumed to be nitrogen limited, an increase in decomposition leads to an increase in nitrogen availability stimulating plant growth. The resulting increase in carbon uptake by vegetation exceeds carbon loss from the soil, leading to enhanced carbon sequestration (a negative feedback). Under very strong surface warming, however, terrestrial ecosystems become a carbon source whether or not carbon–nitrogen interactions are considered. Overall, for small or moderate increases in surface temperatures, consideration of carbon–nitrogen interactions result in a larger increase in atmospheric CO2 concentration in the simulations with prescribed carbon emissions. This suggests that models that ignore terrestrial carbon–nitrogen dynamics will underestimate reductions in carbon emissions required to achieve atmospheric CO2 stabilization at a given level. At the same time, compensation between climate-related changes in the terrestrial and oceanic carbon uptakes significantly reduces uncertainty in projected CO2 concentration.

scholarly journals Effect of increasing CO2 on the terrestrial carbon cycle

2014 ◽  
Vol 112 (2) ◽  
pp. 436-441 ◽  
Author(s):  
David Schimel ◽  
Britton B. Stephens ◽  
Joshua B. Fisher
Keyword(s):  
Climate Change ◽  
Carbon Cycle ◽  
Terrestrial Ecosystems ◽  
Future Climate Change ◽  
Carbon Uptake ◽  
Model Diagnostics ◽  
Terrestrial Carbon ◽  
Terrestrial Carbon Cycle ◽  
New Space ◽  
Improved Model

Feedbacks from the terrestrial carbon cycle significantly affect future climate change. The CO2 concentration dependence of global terrestrial carbon storage is one of the largest and most uncertain feedbacks. Theory predicts the CO2 effect should have a tropical maximum, but a large terrestrial sink has been contradicted by analyses of atmospheric CO2 that do not show large tropical uptake. Our results, however, show significant tropical uptake and, combining tropical and extratropical fluxes, suggest that up to 60% of the present-day terrestrial sink is caused by increasing atmospheric CO2. This conclusion is consistent with a validated subset of atmospheric analyses, but uncertainty remains. Improved model diagnostics and new space-based observations can reduce the uncertainty of tropical and temperate zone carbon flux estimates. This analysis supports a significant feedback to future atmospheric CO2 concentrations from carbon uptake in terrestrial ecosystems caused by rising atmospheric CO2 concentrations. This feedback will have substantial tropical contributions, but the magnitude of future carbon uptake by tropical forests also depends on how they respond to climate change and requires their protection from deforestation.

Changes in oceanic and terrestrial carbon uptake since 1982

Nature ◽  
1995 ◽  
Vol 373 (6512) ◽  
pp. 326-330 ◽  
Author(s):  
R. J. Francey ◽  
P. P. Tans ◽  
C. E. Allison ◽  
I. G. Enting ◽  
J. W. C. White ◽  
...  
Keyword(s):  
Carbon Uptake ◽  
Terrestrial Carbon

scholarly journals Nitrogen deposition: how important is it for global terrestrial carbon uptake?

2013 ◽  
Vol 10 (7) ◽  
pp. 11077-11109 ◽  
Author(s):  
G. Bala ◽  
N. Devaraju ◽  
R. K. Chaturvedi ◽  
K. Caldeira ◽  
R. Nemani
Keyword(s):  
Nitrogen Deposition ◽  
Carbon Storage ◽  
Climate Warming ◽  
N Deposition ◽  
Carbon Uptake ◽  
Terrestrial Carbon ◽  
Co2 Fertilization ◽  
Current Increase ◽  
Community Land Model ◽  
Global Mean

Abstract. Global carbon budget studies indicate that the terrestrial ecosystems have remained a~large sink for carbon despite widespread deforestation activities. CO2-fertilization, N deposition and re-growth of mid-latitude forests are believed to be key drivers for land carbon uptake. In this study, we assess the importance of N deposition by performing idealized near-equilibrium simulations using the Community Land Model 4.0 (CLM4). In our equilibrium simulations, only 12–17% of the deposited Nitrogen is assimilated into the ecosystem and the corresponding carbon uptake can be inferred from a C : N ratio of 20:1. We calculate the sensitivity of the terrestrial biosphere for CO2-fertilization, climate warming and N deposition as changes in total ecosystem carbon for unit changes in global mean atmospheric CO2 concentration, global mean temperature and Tera grams of Nitrogen deposition per year, respectively. Based on these sensitivities, it is estimated that about 242 PgC could have been taken up by land due to the CO2 fertilization effect and an additional 175 PgC taken up as a result of the increased N deposition since the pre-industrial period. Because of climate warming, terrestrial ecosystem could have lost about 152 PgC during the same period. Therefore, since preindustrial times terrestrial carbon losses due to warming may have been approximately compensated by effects of increased N deposition, whereas the effect of CO2-fertilization is approximately indicative of the current increase in terrestrial carbon stock. Our simulations also suggest that the sensitivity of carbon storage to increased N deposition decreases beyond current levels, indicating climate warming effects on carbon storage may overwhelm N deposition effects in the future.

Light limitation regulates the response of autumn terrestrial carbon uptake to warming

2020 ◽  
Vol 10 (8) ◽  
pp. 739-743 ◽  
Author(s):  
Yao Zhang ◽  
Róisín Commane ◽  
Sha Zhou ◽  
A. Park Williams ◽  
Pierre Gentine
Keyword(s):  
Light Limitation ◽  
Carbon Uptake ◽  
Terrestrial Carbon

Large‐scale reductions in terrestrial carbon uptake following central Pacific El Niño

2021 ◽  
Author(s):  
Matthew P. Dannenberg ◽  
William K. Smith ◽  
Yulong Zhang ◽  
Conghe Song ◽  
Deborah N. Huntzinger ◽  
...  
Keyword(s):  
El Niño ◽  
Large Scale ◽  
El Nino ◽  
Carbon Uptake ◽  
Terrestrial Carbon ◽  
Central Pacific ◽  
Central Pacific El Niño

scholarly journals Constraining estimates of terrestrial carbon uptake: new opportunities using long‐term satellite observations and data assimilation

2019 ◽  
Vol 225 (1) ◽  
pp. 105-112 ◽  
Author(s):  
William K. Smith ◽  
Andrew M. Fox ◽  
Natasha MacBean ◽  
David J. P. Moore ◽  
Nicholas C. Parazoo
Keyword(s):  
Data Assimilation ◽  
Satellite Observations ◽  
Carbon Uptake ◽  
Terrestrial Carbon

Impact of Aerosols From Urban and Shipping Emission Sources on Terrestrial Carbon Uptake and Evapotranspiration: A Case Study in East Asia

2020 ◽  
Vol 125 (2) ◽  
Author(s):  
Min Huang ◽  
James H. Crawford ◽  
Gregory R. Carmichael ◽  
Joseph A. Santanello ◽  
Sujay V. Kumar ◽  
...  
Keyword(s):  
East Asia ◽  
Carbon Uptake ◽  
Emission Sources ◽  
Terrestrial Carbon

scholarly journals Greenhouse Gas Concentration and Volcanic Eruptions Controlled the Variability of Terrestrial Carbon Uptake Over the Last Millennium

2019 ◽  
Vol 11 (6) ◽  
pp. 1715-1734 ◽  
Author(s):  
Xuanze Zhang ◽  
Shushi Peng ◽  
Philippe Ciais ◽  
Ying‐Ping Wang ◽  
Jeremy D. Silver ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Volcanic Eruptions ◽  
Carbon Uptake ◽  
Last Millennium ◽  
Terrestrial Carbon ◽  
Gas Concentration

scholarly journals Enhanced regional terrestrial carbon uptake over Korea revealed by atmospheric CO 2 measurements from 1999 to 2017

2020 ◽  
Vol 26 (6) ◽  
pp. 3368-3383 ◽  
Author(s):  
Jeongmin Yun ◽  
Sujong Jeong ◽  
Chang‐Hoi Ho ◽  
Hoonyoung Park ◽  
Junjie Liu ◽  
...  
Keyword(s):  
Carbon Uptake ◽  
Terrestrial Carbon
Sign in / Sign up

Export Citation Format

Share Document