Seasonal and interannual variations in carbon dioxide exchange of a temperate larch forest

Hirata, Ryuichi; Hirano, Takashi; Saigusa, Nobuko; Fujinuma, Yasumi; Inukai, Koh; Kitamori, Yasuyuki; Takahashi, Yoshiyuki; Yamamoto, Susumu

doi:10.1016/j.agrformet.2007.07.005

Cited by 124 publications

(114 citation statements)

References 49 publications

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“…TMK is a Japanese larch (L. kaempferi) plantation located 15 km northwest of Tomakomai, Hokkaido, Japan (Hirano et al 2003;Hirata et al 2007). Trees were about 45 years old at the time of the measurement.…”

Section: Site Descriptionmentioning

confidence: 99%

“…Larix species also have been planted intensively throughout northern Japan and China, because of their high cold tolerance and timber productivity (Hirata et al 2007). For these reasons, it is important to gain a comprehensive understanding of the carbon and energy exchange characteristics of larch forests (Li et al 2005;Machimura et al 2005;Wang et al 2005b;Hirata et al 2007;Nakai et al 2008;Ohta et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia

Takagi

Hirata

Ide

et al. 2015

Soil Science and Plant Nutrition

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Larch (Larix spp.) forests are predominantly distributed across high latitudes of Eurasia. They potentially have a strong influence on the terrestrial carbon and energy cycles, because of their vast area and the large carbon stocks in their peat soils in the permafrost. In this study, we elucidated intersite variation of ecosystem photosynthetic and respiratory parameters of eight larch forests in East Asia using the CarboEastAsia carbon flux and micrometeorology dataset. These parameters were determined using the empirical relationship between the carbon fluxes (photosynthesis and respiration) and micrometeorological variables (light and temperature). In addition, we examined leaf area index (LAI) determined by Moderate Resolution Imaging Spectroradiometer (MODIS) remote sensing data to explain the intersite variation. Linear or exponential relationships with annual mean temperature or seasonal maximum LAI at the study sites were found for the annual carbon fluxes (gross primary production [GPP] and total ecosystem respiration [RE]) as well as for four of the five seasonal maximum values of determined photosynthetic and respiratory parameters (maximum GPP at light saturation, initial slope of the light-response curve, daytime respiration, and RE at the reference temperature of 10°C). Phenological indices, such as start day of the growing season, growing season length and growing season degree days explained much of the intersite variation of GPP and RE of the studied larch forests; however, the relationship between MODIS LAI and photosynthetic or respiratory parameters implies that the intersite variation in GPP and RE was caused not only by the temperature variation (abiotic factor), but also by the variation in the photosynthetic and respiration activity by vegetation (biotic factor) through the change in leaf (or whole vegetation) biomass. Our analysis shows that MODIS LAI serves as a good index to explain the variation of the ecosystem photosynthetic and respiratory characteristics of East Asian larch forests.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia

Takagi

Hirata

Ide

et al. 2015

Soil Science and Plant Nutrition

Self Cite

View full text Add to dashboard Cite

show abstract

“…At both sites, the forest floor is covered with a thick understory, which consists mainly of evergreen dwarf bamboo at Teshio and ferns at Tomakomai. Details of the Teshio and Tomakomai sites were given by Takagi et al (2009) and Hirata et al (2007), respectively.…”

Section: Site Descriptionmentioning

confidence: 99%

The impact of climate variation and disturbances on the carbon balance of forests in Hokkaido, Japan

et al. 2014

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Abstract. We evaluated the long-term (52-year) effect of climate, disturbance, and subsequent recovery on the carbon balance of cool temperate forests by using the processbased ecosystem model VISIT. The study sites were artificial larch forests planted after clear-cutting of mixed forest in Hokkaido, Japan. The model was validated, scenarios were computed, and a sensitivity analysis was performed. First, we performed a baseline simulation of carbon dynamics and compared these values with those observed across a wide range of stand ages (old mixed forest and young and middle-aged larch forests). Second, we ran scenarios to investigate how disturbance and several climate factors affect long-term carbon fluxes. Third, we analyzed the sensitivity of carbon balance to the amount of disturbance-generated tree biomass residues. By taking into account seasonal variation in the understory leaf area index, which played an important role, especially in the initial stage of recovery, the simulated net ecosystem production (NEP), gross primary production, ecosystem respiration, and biomass for the three types of forest were consistent with observed values (mean ± SD of R 2 of monthly NEP, GPP and RE for the three types of forest were 0.63 ± 0.26, 0.93 ± 0.07, 0.94 ± 0.2, respectively). The effect of disturbances such as clear-cutting, land-use conversion, and thinning on the long-term trend of NEP was larger than that of climate variation, even 50 years after clearcutting. In contrast, interannual variation in the carbon balance was primarily driven by climate variation. These findings indicate that disturbance controlled the long-term trend of the carbon balance, whereas climate factors controlled yearly variation in the carbon balance. Among the meteorological factors considered, temperature and precipitation were the main ones that affected NEP and its interannual variation. The carbon balance in the initial post-disturbance period, which is strongly affected by the amount of residues, influenced the subsequent long-term carbon budget, implying the importance of residue management. Consequently, carbon release just after disturbance and the length of the recovery period required to balance the carbon budget are controlled by the amount of residues.

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“…The second eddy covariance data were collected at the Tomakomai flux research site located in the Tomakomai National Forest, Hokkaido, Japan, between May 18 to August 5, 2002. The measurements were made at a height of 42 m above a 15 m-high larch on a flat piedmont (Hirano et al 2003;Hirata et al 2007). …”

Section: Datamentioning

confidence: 99%

Eddy Covariance Calculation Revisited with Wavelet Cospectra

Saito

Asanuma

2008

SOLA

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In this paper, the calculation of eddy covariance flux is reevaluated with newly-emerged capability of the wavelet transform. It is demonstrated that the wavelet transform clearly revealed the cospectral gap that separates turbulent and mesoscale motions with the data collected over a rice and a larch forest. It is also shown that the computed eddy covariance flux is insensitive to the method of decomposition of the turbulent fluctuation from the mean when averaging time is set at around the cospectral gap location. Therefore, information on the gap location removes the ambiguity in the calculation of eddy covariance flux.

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Seasonal and interannual variations in carbon dioxide exchange of a temperate larch forest

Cited by 124 publications

References 49 publications

Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia

Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia

The impact of climate variation and disturbances on the carbon balance of forests in Hokkaido, Japan

Eddy Covariance Calculation Revisited with Wavelet Cospectra

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Seasonal and interannual variations in carbon dioxide exchange of a temperate larch forest

Cited by 124 publications

References 49 publications

Spatial and seasonal variations of CO2flux and photosynthetic and respiratory parameters of larch forests in East Asia

Spatial and seasonal variations of CO2flux and photosynthetic and respiratory parameters of larch forests in East Asia

The impact of climate variation and disturbances on the carbon balance of forests in Hokkaido, Japan

Eddy Covariance Calculation Revisited with Wavelet Cospectra

Contact Info

Product

Resources

About

Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia

Spatial and seasonal variations of CO₂flux and photosynthetic and respiratory parameters of larch forests in East Asia