Airplane measurements of carbon dioxide distribution on Iriomote Island in Japan

Yamamoto, Susumu; Kumakura, Hiroaki; Gamo, Minoru; Murayama, Shohei; Kaneyasu, Naoki; Hayashi, Masayasu

doi:10.1016/1352-2310(95)00327-4

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…These data showed lower concentrations in daytime site showed no such profile. Yamamoto et al (1996) reported on the distribution of CO 2 concentrations around Iriomote Island using a small air plane and found that the difference in concentrations between the upwind area and downwind area at a certain level (200-1000 m) were 2-4 ppm, which was almost the same level as our sonde observation.…”

Section: Measurements By the Multi-site Continuous Co 2 Monitorssupporting

confidence: 81%

“…Comparison of the estimated CO 2 fluxes obtained in this study and in previous studies. a CO 2 flux at Iriomote from noon to 17:00 in March and November 1991and July 1992(Yamamoto et al, 1996 uptake always decreased the CO 2 concentration at the downwind sites during the daytime to about 1-10 ppm lower than the background level values, while forest respiration increased the CO 2 concentration at night by about 20-30 ppm. In the case of Borneo, the investigated forest was so large in relation to the wind speed effects that the experimental sites were not located along the pathway of the air mass.…”

Section: Estimation Of the Co 2 Flux From Vertical Profile Datamentioning

confidence: 93%

“…10). Yamamoto et al (1996) estimated the CO 2 flux from aircraft observations of CO 2 around Iriomote Island on March and November 1991 and July 1992 and reported that the CO 2 fluxes around 06:00 and around noon were 2.9 and −3.1 to −15.2 μmol m −2 s −1 , respectively. Those values are almost the Fig.…”

Section: Estimation Of the Co 2 Flux From Vertical Profile Datamentioning

confidence: 99%

“…These studies demonstrated the feasibility of applying the CO 2 flux assessment method to relatively large forests. On the other hand, Yamamoto et al (1996) assessed the CO 2 sink flux of the subtropical forest on Iriomote Island using not vertical profile measurements, but the horizontal CO 2 distribution at a height of 300 m by aircraft.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of forest CO<sub>2</sub> fluxes from sonde measurements in three different climatological areas including Borneo, Malaysia, and Iriomote and Hokkaido, Japan

Nomura¹,

Mukai²,

Terao³

et al. 2018

Tellus B: Chemical and Physical Meteorology

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Evaluation of carbon dioxide (CO 2) sinks in forest areas of East and Southeast Asia (especially tropical regions) is important for assessing CO 2 budgets at the regional scale. To evaluate the CO 2 flux of large forest areas, we collected vertical CO 2 profiles over the forest using a CO 2 sonde and measured surface CO 2 concentrations around the forest using continuous CO 2 measurement equipment. These observations were performed over a typical northern forest (Hokkaido) in Japan, a subtropical forest island (Iriomote Island) in Japan, and a tropical forest in Borneo Island. We detected the differences in CO 2 vertical profiles between dawn and daytime, and at the upwind and downwind sites of the forests with the observational results from the CO 2 sonde. We also clarified that CO 2 concentrations during daytime at the downwind sites (affected by the forest) were systematically lower than those at the upwind sites (not affected by the forest). In contrast, CO 2 concentrations during dawn at the downwind sites were larger than those at the upwind site. We estimated the CO 2 fluxes (μmol m −2 s −1) at dawn and daytime of the forests from these observational results. The CO 2 fluxes of Borneo's forest were very large (16.5 and −37.7 at dawn and daytime, respectively), whereas the CO 2 fluxes of the forests in Hokkaido and Iriomote were lower (3.9 to 11.8 at dawn and −11.8 to −15.0 at daytime). These evaluated values were consistent with fluxes measured by the eddy-covariance method in the same region. Thus, use of the CO 2 sonde to collect observations of CO 2 vertical profiles was considered to be an effective method to verify CO 2 absorption and emission in large forest areas. This method can also be used to evaluate dynamic CO 2 absorption and emission processes in tropical forests.

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Section: Measurements By the Multi-site Continuous Co 2 Monitorssupporting

confidence: 81%

Section: Estimation Of the Co 2 Flux From Vertical Profile Datamentioning

confidence: 93%

Section: Estimation Of the Co 2 Flux From Vertical Profile Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of forest CO<sub>2</sub> fluxes from sonde measurements in three different climatological areas including Borneo, Malaysia, and Iriomote and Hokkaido, Japan

Nomura¹,

Mukai²,

Terao³

et al. 2018

Tellus B: Chemical and Physical Meteorology

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“…Long‐term observations of CO 2 within the continental atmospheric boundary layer (ABL) with significant accuracy available from tall towers (Bakwin et al, 1998), eddy flux towers (Wofsy and Harris, 2002) and aircraft measurements (Lloyd et al, 2001) appear closer to the regional fluxes of CO 2 , specially when compared to observations from above the ABL or from remote stations at the same latitude (Gerbig et al, 2006). Carbon sinks and sources distributions and their seasonal variability obtained from field measurements on different ecosystems are needed to establish a numerical global model of CO 2 concentrations (Yamamoto et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Daily carbon surface fluxes in the West Ebre (Ebro) watershed from aircraft profiling on late June 2007

Font

Morguí

Curcoll

et al. 2010

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T An intensive aircraft campaign measuring atmospheric CO 2 mixing ratios was carried out in the central part of the Ebre watershed on late June 2007 to characterize the CO 2 dynamics in the Ebre basin and to calculate the regional cumulative carbon surface flux. CO 2 concentrations were obtained from vertical profiles over La Muela (LMU; 41.60 • N, 1.1 • W) from 900 to 4000 m above the sea level (masl), horizontal transects at ∼2000 m 100 km west from LMU, and continuous measurements at ∼650 masl. Different estimates of surface flux from changes in the convective boundary layer (CBL) CO 2 concentration were obtained following the Integral CBL budgeting equation (ICBL) and the carbon content integration (CCI) method. Values of the mean surface flux calculated from the different approaches range from −2.4 to −7.9 μmolCO 2 /m 2 s. Regional surface flux calculated from vertical profiling appears to be consistent in a distance of 70 km away from the measurement site. The ICBL method is very sensitive to the accurate determination of the concentration in the entrainment zone. The overall uncertainty from fluxes calculated from the ICBL method rises to a value of 70%, whereas the uncertainty linked to the CCI method is 55%.

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Methods for stable gas flux determination in aquatic and terrestrial systems

Lapitan

Wanninkhof

Mosier³

1999

Developments in Atmospheric Science

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Airplane measurements of carbon dioxide distribution on Iriomote Island in Japan

Cited by 8 publications

References 10 publications

Evaluation of forest CO<sub>2</sub> fluxes from sonde measurements in three different climatological areas including Borneo, Malaysia, and Iriomote and Hokkaido, Japan

Evaluation of forest CO<sub>2</sub> fluxes from sonde measurements in three different climatological areas including Borneo, Malaysia, and Iriomote and Hokkaido, Japan

Daily carbon surface fluxes in the West Ebre (Ebro) watershed from aircraft profiling on late June 2007

Methods for stable gas flux determination in aquatic and terrestrial systems

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