Evaluation of Top-Down and Bottom-Up Global Terrestrial Respiration Estimates and Their Mismatch With Model Simulations
文献类型：期刊论文
| 作者 | Ballantyne, Ashley5,6; Bond-Lamberty, Ben4; Endsley, Arthur5; Fluet-Chouinard, Etienne7; Liu, Zhihua5; Patel, Kaizad4; Smith, Elizabeth1; Vargas, Rodrigo1,2; Zhao, Bo3 |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2026-02-27 |
| 卷号 | 40期号:3页码:e2025GB008544 |
| 关键词 | global C cycle respiration climate change |
| ISSN号 | 0886-6236 |
| DOI | 10.1029/2025GB008544 |
| 产权排序 | 7 |
| 文献子类 | Article |
| 英文摘要 | Terrestrial respiration is one of the poorly understood processes in the global carbon cycle. However, expanding observations and machine learning approaches have led to a proliferation of estimates. We compiled total ecosystem and heterotrophic respiration estimates derived from top-down atmospheric inversions and bottom-up upscaling of ecosystem observations and compared them with dynamic vegetation model (DGVM) simulations over the 1980-2020 period. Our analysis revealed a convergence in mean annual global total ecosystem respiration estimates between top-down 97.1 (+/- SD 6.8) PgC yr(-1) and bottom-up 98.5 (+/- 13.4) PgC yr(-1), which were both significantly lower than the ensemble mean from DGVM estimates 133.7 (+/- 4.7) PgC yr(-1). We also found similar temporal trends between top-down total ecosystem respiration 0.075 (+/- 0.05) PgC yr(-2) and bottom-up total soil respiration estimates of 0.05 (+/- 0.05) PgC yr(-2); however, the ensemble mean of total ecosystem respiration trends was 5-7 times larger (0.34 PgC yr(-2)). Global heterotrophic respiration showed much less agreement, ranging from top-down estimates of 42.7 (+/- 4.0) PgC yr(-1) to bottom-up estimates of 51.5 (+/- 4.0) PgC yr(-1) and a significantly larger ensemble model mean estimate of 60.8 PgC yr(-1) (+/- 1.9). The temporal trends in observation-based bottom-up estimates of heterotrophic respiration (0.03 +/- 0.007 PgC yr(-2)) were only one fifth of the model ensemble mean trend (0.15 +/- 0.04 PgC yr(-2)). Thus, total global ecosystem respiration is dominated by belowground respiration (87%), and belowground respiration is dominated by heterotrophic respiration (60%). Therefore, improved regional and heterotrophic respiration estimates are necessary to reduce uncertainties regarding future global respiration. |
| URL标识 | 查看原文 |
| WOS关键词 | SOIL HETEROTROPHIC RESPIRATION ; NET ECOSYSTEM EXCHANGE ; CONSTANT FRACTION ; SATELLITE ; EMISSIONS ; TEMPERATURE ; SENSITIVITY ; VEGETATION ; ASSIMILATION ; SEPARATION |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001703821500001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221223]  |
| 专题 | 拉萨站高原生态系统研究中心_外文论文 |
| 通讯作者 | Ballantyne, Ashley |
| 作者单位 | 1.Univ Delaware, Dept Plant & Soil Sci, Newark, DE USA; 2.Arizona State Univ, Sch Life Sci, Tempe, AZ USA; 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing, Peoples R China 4.Pacific Northwest Natl Lab, Environm & Biol Sci Directorate, Richland, WA USA; 5.Univ Montana, Dept Ecosyst & Conservat Sci, Missoula, MT 59812 USA; 6.Univ Paris Saclay, Lab Sci Climat & Environm, Gif Sur Yvette, France; 7.Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA USA; |
| 推荐引用方式 GB/T 7714 | Ballantyne, Ashley,Bond-Lamberty, Ben,Endsley, Arthur,et al. Evaluation of Top-Down and Bottom-Up Global Terrestrial Respiration Estimates and Their Mismatch With Model Simulations[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2026,40(3):e2025GB008544. |
| APA | Ballantyne, Ashley.,Bond-Lamberty, Ben.,Endsley, Arthur.,Fluet-Chouinard, Etienne.,Liu, Zhihua.,...&Zhao, Bo.(2026).Evaluation of Top-Down and Bottom-Up Global Terrestrial Respiration Estimates and Their Mismatch With Model Simulations.GLOBAL BIOGEOCHEMICAL CYCLES,40(3),e2025GB008544. |
| MLA | Ballantyne, Ashley,et al."Evaluation of Top-Down and Bottom-Up Global Terrestrial Respiration Estimates and Their Mismatch With Model Simulations".GLOBAL BIOGEOCHEMICAL CYCLES 40.3(2026):e2025GB008544. |
入库方式： OAI收割
来源：地理科学与资源研究所
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