| DOI: | 10.1111/gcb.14145
|
| Scopus记录号: | 2-s2.0-85045399324
|
| 论文题名: | Assessing canopy performance using carbonyl sulfide measurements |
| 作者: | Yang F.; Qubaja R.; Tatarinov F.; Rotenberg E.; Yakir D.
|
| 刊名: | Global Change Biology
|
| ISSN: | 13541013
|
| 出版年: | 2018
|
| 卷: | 24, 期:8 | | 起始页码: | 3486
|
| 结束页码: | 3498
|
| 语种: | 英语
|
| 英文关键词: | canopy conductance
; canopy fluxes
; carbonyl sulfide
; flux partitioning
; foliage temperature
; gross primary productivity
; leaf relative uptake
|
| Scopus关键词: | canopy
; carbon cycle
; carbonyl compound
; ecosystem function
; foliage
; leaf
; measurement method
; partitioning
; performance assessment
; temperature effect
|
| 英文摘要: | Carbonyl sulfide (COS) is a tracer of ecosystem photosynthesis that can advance carbon cycle research from leaf to global scales; however, a range of newly reported caveats related to sink/source strength of various ecosystem components hinder its application. Using comprehensive eddy-covariance and chamber measurements, we systematically measure ecosystem contributions from leaf, stem, soil, and litter and were able to close the ecosystem COS budget. The relative contributions of nonphotosynthetic components to the overall canopy-scale flux are relatively small (~4% during peak activity season) and can be independently estimated based on their responses to temperature and humidity. Converting COS to photosynthetic CO2 fluxes based on the leaf relative uptake of COS/CO2, faces challenges due to observed daily and seasonal changes. Yet, this ratio converges around a constant value (~1.6), and the variations, dominated by light intensity, were found unimportant on a flux-weighted daily time-scale, indicating a mean ratio of daytime gross-to-net primary productivity of ~2 in our ecosystem. The seasonal changes in the leaf relative uptake ratio may indicate a reduction in mesophyll conductance in winter, and COS-derived canopy conductance permitted canopy temperature estimate consistent with radiative skin temperature. These results support the feasibility of using COS as a powerful and much-needed means of assessing ecosystem function and its response to change. © 2018 John Wiley & Sons Ltd |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/110290
|
| Appears in Collections: | 影响、适应和脆弱性
气候变化事实与影响
|
|
There are no files associated with this item.
|
|
作者单位: | Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel
|
| Recommended Citation: | |
Yang F.,Qubaja R.,Tatarinov F.,et al. Assessing canopy performance using carbonyl sulfide measurements[J]. Global Change Biology,2018-01-01,24(8)
|
|
|