Statistical analyses of inter-annual variations in the vertical profile of atmospheric CO2 mixing ratio and carbon budget in a cool-temperate deciduous forest in Japan

Murayama, Shohei; Yamamoto, Susumu; Saigusa, Nobuko; Kumakura, Hiroaki; Takamura, Chikako

doi:10.1016/j.agrformet.2005.08.017

Cited by 9 publications

(7 citation statements)

References 29 publications

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“…The correlation coefficient of 0.67 (statistically significant at p < 0.05) between the two variables indicates a relatively strong relation though the influence area of the mixing ratio measurements is larger than that of the NEE measurements (Gloor et al, 2001; Barcza et al, 2009). Importance of the soil respiration in the formation of the nighttime ground level CO 2 mixing ratio was also indicated by Murayama et al (2005).…”

Section: Changes In the Diurnal Variationmentioning

confidence: 96%

“…Linderholm, 2006, and references therein) Schmidt et al (2003) and Lintner et al (2006) did not detect increasing annual amplitude in their atmospheric CO 2 measurements. Higuchi et al (2002) and Murayama et al (2005, 2007) showed that interannual and quasi‐decadal changes in the circulation pattern might also influence the regional CO 2 concentration. Response of an ecosystem to the environmental changes also depends on its age and type (Zimov et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Haszpra

Barcza

2010

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T This paper analyses a 15-year long atmospheric CO 2 mixing ratio record measured at a mid-continental, low-elevation station (Hegyhátsál, Hungary) to reveal the effect of regional climate variability. While the long-term trend and the temporal fluctuation of the growth rate of CO 2 mixing ratio follow the global tendencies to a large extent, the shorter-term variations show special features. We present the distorted seasonal cycle caused by the seasonality in the atmospheric vertical mixing and the tendentious change in its shape, which can be attributed to the gradual warming and to the resulted prolongation of the growing season. The decreasing summer diurnal amplitude and the decreasing seasonal amplitude in the mixing ratio, furthermore the higher than average summer CO 2 mixing ratio growth rate in the first period of the measurements (1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003) with generally rising temperature and decreasing precipitation are explained as the consequence of the reduced activity of the biosphere in the influence area of the station and that of the reduced biomass under environmental conditions getting increasingly unfavourable. The explanation is supported by the colocated tall tower surface-atmosphere CO 2 exchange measurements and by the crop yield statistics of the dominantly agricultural region around the station.

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Section: Changes In the Diurnal Variationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Haszpra

Barcza

2010

Tellus B: Chemical and Physical Meteorology

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“…[6] Since detailed descriptions of our observation site have already been given in our previous papers [Yamamoto et al, 1999;Saigusa et al, 2005;Murayama et al, 2003aMurayama et al, , 2005, only a brief description will be presented here. Our observation site is located in a mountainous area in the central part of the main island of Japan (36°08′N, 137°25′E, 1420 m above sea level (asl)) ( Figure 1) and is situated about 15 km east of a local city, Takayama.…”

Section: Site Descriptionmentioning

confidence: 99%

Seasonal variations of atmospheric CO₂, δ¹³C, and δ¹⁸O at a cool temperate deciduous forest in Japan: Influence of Asian monsoon

et al. 2010

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“…Given the quantity and diversity of observations at the Takayama site, researchers have not yet used several components of the data in modeling studies. For example, high-precision measurements of the atmospheric composition and isotopic ratios (such as, d 13 C and d 18 O of ambient CO 2 ) have been obtained at the site (e.g., Murayama et al 2005Murayama et al , 2010. Both above-and within-canopy air sampling has been conducted and these results could be used to describe local exchanges between the terrestrial ecosystem and the ambient air.…”

Section: Future Work At the Takayama Sitementioning

confidence: 99%

Synergies between observational and modeling studies at the Takayama site: toward a better understanding of processes in terrestrial ecosystems

Ito

Saitoh

Sasai

2014

Ecological Research

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This paper reviews past and ongoing ecological studies at the Takayama forest site, one of Japan's long‐term research sites with intensive studies; the emphasis here is on the synergies between observational and modeling studies. This synergism has been encouraged because global environmental change is a complicated and interdisciplinary issue that requires this type of collaboration. The increasing amount and quality of observational data available from this site helps researchers to better constrain their model simulations because substantial uncertainties remain in the behavior of models in their current form. In addition, modeling studies encourage observational research by integrating observational data within a comprehensive framework. They do this by demanding more long‐term and high‐quality data related to specific ecological processes, and by identifying high‐priority processes and parameters that should be studied. We describe the types of modeling studies that have been conducted and how observational data from the Takayama site have improved the accuracy of these models. Many terrestrial ecosystem models have been applied to data from the site, both to validate the present forms of the models and to refine the structure and parameterization of the models. The development of new or improved terrestrial ecosystem models will be further facilitated by the requirements to simulate atmosphere–ecosystem exchanges and internal biogeochemical processes, as well as simulating their responses to a changing environment. We conclude by discussing the remaining research gaps and opportunities for deepening our understanding of terrestrial ecosystems through future collaborative studies.

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Statistical analyses of inter-annual variations in the vertical profile of atmospheric CO2 mixing ratio and carbon budget in a cool-temperate deciduous forest in Japan

Cited by 9 publications

References 29 publications

Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Seasonal variations of atmospheric CO₂, δ¹³C, and δ¹⁸O at a cool temperate deciduous forest in Japan: Influence of Asian monsoon

Synergies between observational and modeling studies at the Takayama site: toward a better understanding of processes in terrestrial ecosystems

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Statistical analyses of inter-annual variations in the vertical profile of atmospheric CO2 mixing ratio and carbon budget in a cool-temperate deciduous forest in Japan

Cited by 9 publications

References 29 publications

Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Climate variability as reflected in a regional atmospheric CO<sub>2</sub> record

Seasonal variations of atmospheric CO2, δ13C, and δ18O at a cool temperate deciduous forest in Japan: Influence of Asian monsoon

Synergies between observational and modeling studies at the Takayama site: toward a better understanding of processes in terrestrial ecosystems

Contact Info

Product

Resources

About

Seasonal variations of atmospheric CO₂, δ¹³C, and δ¹⁸O at a cool temperate deciduous forest in Japan: Influence of Asian monsoon