تقرير
Historically inconsistent productivity and respiration fluxes in the global terrestrial carbon cycle
| العنوان: | Historically inconsistent productivity and respiration fluxes in the global terrestrial carbon cycle |
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| المؤلفون: | Jinshi Jian, Vanessa Bailey, Kalyn Dorheim, Alexandra G. Konings, Dalei Hao, Alexey N. Shiklomanov, Abigail Snyder, Meredith Steele, Munemasa Teramoto, Rodrigo Vargas, Benjamin Bond-Lamberty |
| المصدر: | Nature Communications. 13 |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Meteorology And Climatology, Earth Resources And Remote Sensing |
| الوصف: | The terrestrial carbon cycle is a major source of uncertainty in climate projections. Its dominant fluxes, gross primary productivity (GPP), and respiration (in particular soil respiration, RS), are typically estimated from independent satellite-driven models and upscaled in situ measurements, respectively. We combine carbon-cycle flux estimates and partitioning coefficients to show that historical estimates of global GPP and RS are irreconcilable. When we estimate GPP based on RS measurements and some assumptions about RS:GPP ratios, we found the resulted global GPP values (bootstrap mean 149^(+29)_(−23) Pg C/yr) are significantly higher than most GPP estimates reported in the literature (113^(+18)_(−18) Pg C/yr). Similarly, historical GPP estimates imply a soil respiration flux (Rs(_GPP), bootstrap mean of 68^(+10)_(−8) Pg C/yr) statistically inconsistent with most published RS values (87^(+9)_(−8) Pg C/yr), although recent, higher, GPP estimates are narrowing this gap. Furthermore, global R_(S):GPP ratios are inconsistent with spatial averages of this ratio calculated from individual sites as well as CMIP6 model results. This discrepancy has implications for our understanding of carbon turnover times and the terrestrial sensitivity to climate change. Future efforts should reconcile the discrepancies associated with calculations for GPP and Rs to improve estimates of the global carbon budget. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 2041-1723 |
| DOI: | 10.1038/s41467-022-29391-5 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20220007509 |
| ملاحظات: | 304029.01.31.02.02 STEP No. 2019QZKK0603 NASA 80NSSC18K0179 NASA NNH16ZDA001N-IDS NSF DEB-1942133 DE-AC05-76RL01830 |
| رقم الأكسشن: | edsnas.20220007509 |
| قاعدة البيانات: | NASA Technical Reports |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 20411723 |
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| DOI: | 10.1038/s41467-022-29391-5 |