Influence of spring and autumn phenological transitions on forest ecosystem productivity
Andrew D. Richardson,T. Andy Black,Philippe Ciais,Nicolas Delbart,Mark A. Friedl,Nadine Gobron,David Y. Hollinger,Werner L. Kutsch,Bernard Longdoz,Sebastiaan Luyssaert,Sebastiaan Luyssaert,Mirco Migliavacca,Leonardo Montagnani,Leonardo Montagnani,J. William Munger,Eddy Moors,Shilong Piao,Corinna Rebmann,Markus Reichstein,Nobuko Saigusa,Enrico Tomelleri,Rodrigo Vargas,Andrej Varlagin +22 more
TLDR
Investigation of relationships between phenology and productivity in temperate and boreal forests finds the productivity of evergreen needleleaf forests is less sensitive to phenology than is productivity of deciduous broadleaf forests, which has implications for how climate change may drive shifts in competition within mixed-species stands.Abstract:
We use eddy covariance measurements of net ecosystem productivity (NEP) from 21 FLUXNET sites (153 site-years of data) to investigate relationships between phenology and productivity (in terms of both NEP and gross ecosystem photosynthesis, GEP) in temperate and boreal forests. Results are used to evaluate the plausibility of four different conceptual models. Phenological indicators were derived from the eddy covariance time series, and from remote sensing and models. We examine spatial patterns (across sites) and temporal patterns (across years); an important conclusion is that it is likely that neither of these accurately represents how productivity will respond to future phenological shifts resulting from ongoing climate change. In spring and autumn, increased GEP resulting from an 'extra' day tends to be offset by concurrent, but smaller, increases in ecosystem respiration, and thus the effect on NEP is still positive. Spring productivity anomalies appear to have carry-over effects that translate to productivity anomalies in the following autumn, but it is not clear that these result directly from phenological anomalies. Finally, the productivity of evergreen needleleaf forests is less sensitive to phenology than is productivity of deciduous broadleaf forests. This has implications for how climate change may drive shifts in competition within mixed-species stands.read more
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Climate change, phenology, and phenological control of vegetation feedbacks to the climate system
Andrew D. Richardson,Trevor F. Keenan,Mirco Migliavacca,Youngryel Ryu,Youngryel Ryu,Oliver Sonnentag,Oliver Sonnentag,Michael Toomey +7 more
TL;DR: In this paper, the authors discuss the environmental drivers of phenology, and the impacts of climate change on phenology in different biomes, and assess the potential impact on these feedbacks of shifts in phenology driven by climate change.
Intercomparison, interpretation, and assessment of spring phenology in North America estimated from remote sensing for 1982-2006 M I C H A E L A. W H I T E*, K I R S T E N M. DE BEURS w , K A M E L D I D A Nz, D AV I D W. I N O U Y E § ,
Allard De Wit,Rt Z +1 more
TL;DR: In this paper, the authors assess 10 start-of-spring (SOS) methods for North America between 1982 and 2006 and find that SOS estimates were more related to the first leaf and first flowers expanding phenological stages.
Journal ArticleDOI
Characteristics, drivers and feedbacks of global greening
Shilong Piao,Shilong Piao,Xuhui Wang,Taejin Park,Taejin Park,Chi Chen,Xu Lian,Yue He,Jarle W. Bjerke,Anping Chen,Philippe Ciais,Philippe Ciais,Hans Tømmervik,Ramakrishna R. Nemani,Ranga B. Myneni +14 more
TL;DR: In this article, the authors examined the detection of the greening signal, its causes and its consequences, and showed that greening is pronounced over intensively farmed or afforested areas, such as in China and India, reflecting human activities.
Journal ArticleDOI
Evaluation of terrestrial carbon cycle models for their response to climate variability and to CO2 trends.
Shilong Piao,Shilong Piao,Stephen Sitch,Philippe Ciais,Pierre Friedlingstein,Philippe Peylin,Xuhui Wang,Anders Ahlström,Alessandro Anav,Josep G. Canadell,Nan Cong,Chris Huntingford,Martin Jung,Samuel Levis,Peter Levy,Junsheng Li,Xin Lin,Mark R. Lomas,Meng Lu,Yiqi Luo,Yuecun Ma,Ranga B. Myneni,Ben Poulter,Zhenzhong Sun,Tao Wang,Nicolas Viovy,Soenke Zaehle,Ning Zeng +27 more
TL;DR: Carbon-nitrogen interactions significantly influence the simulated response of carbon cycle to temperature and atmospheric CO2 concentration, suggesting that nutrients limitations should be included in the next generation of terrestrial biosphere models.
Journal ArticleDOI
Changes in satellite-derived vegetation growth trend in temperate and boreal Eurasia from 1982 to 2006
TL;DR: In this article, the authors combined datasets of satellite-derived Normalized Difference Vegetation Index (NDVI) and climatic factors to analyze spatio-temporal patterns of changes in vegetation growth and their linkage with changes in temperature and precipitation in temperate and boreal regions of Eurasia.
References
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Journal ArticleDOI
Postulated feedbacks of deciduous forest phenology on seasonal climate patterns in the Western Canadian interior.
TL;DR: A large portion of the western Canadian interior exhibits a distinctive seasonal pattern in long-term mean surface temperatures characterized by anomalously warmer conditions in spring and autumn than would be expected from a sinusoidal model as discussed by the authors.
Book ChapterDOI
Phenological Differences Between Understory and Overstory
TL;DR: Standard models of varying complexity are fitted to the budburst time series for each species to investigate whether biological responses to environmental cues differed among species, implying that species can be expected to differ in their responses to future climate change.
Phenological Differences Between Understory and Overstory: A Case Study Using the Long-Term Harvard Forest Records
TL;DR: Standard models of varying complexity are fitted to the budburst time series for each species to investigate whether biological responses to environmental cues differed among species, implying that species can be expected to differ in their responses to future climate change.
Journal ArticleDOI
Phenology and Springtime Surface-Layer Change
TL;DR: This article examined many surface-level meteorological variables (at standard shelter height, representing surface-layer conditions) during the time of spring leafing in order to detect other changes and to further analyze the cause, extent, and persistence of t...
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