The Carbon Sequestration of Pinus tabulaeformis Forests in Shanxi Province, China

2013 ◽  
Vol 807-809 ◽  
pp. 810-813
Author(s):  
Fei Li ◽  
Hua Yong Zhang ◽  
Zhong Yu Wang ◽  
Zong Han Li
Keyword(s):  
Carbon Sequestration ◽  
Field Measurement ◽  
Carbon Sink ◽  
Measurement Data ◽  
Total Carbon ◽  
Pinus Tabulaeformis ◽  
Shanxi Province ◽  
Inventory Data ◽  
Stand Volume ◽  
The Relationship

In order to estimate the carbon sequestration of Pinus tabulaeformis forests in Shanxi Province, field measurement data from 36 Pinus tabulaeformis forest stands and the 8th National Forest Resource Inventory data were collected. Using the field measurement data, the relationship between stand volume and stand biomass was established. By applying the relationship and a specific carbon concentration coefficient to the forest inventory data, the carbon sequestrations of nature and planted Pinus tabulaeformis forests in each age class were estimated respectively. The results show that the total carbon sequestration of Pinus tabulaeformis forests in Shanxi Province is 13.43 Tg (1 Tg=1012 g). The nature forests are acting as the major carbon sink, with the carbon sequestration accounting for 64% of the total amount. Among the forests in different age classes, the mid-aged and premature forests have sequestered around 10.92 Tg C, which accounts for 81% of the total carbon sequestration.

The Carbon Sequestration of Oak Forests in Shanxi Province, China

2014 ◽  
Vol 507 ◽  
pp. 829-832
Author(s):  
Fei Li ◽  
Hua Yong Zhang ◽  
Jia Li ◽  
Wei Zhang ◽  
Yi Xin Xu
Keyword(s):  
Carbon Sequestration ◽  
Field Measurement ◽  
Forest Inventory ◽  
Measurement Data ◽  
Shanxi Province ◽  
Oak Forests ◽  
Oak Forest ◽  
Inventory Data ◽  
Forest Inventory Data ◽  
The Relationship

Oak forest is one of the most crucial zonal forests in Shanxi Province, China. A precise estimation of its carbon sequestration is of great value to the construction of regional carbon budgets. In this study, field measurement data from 47 oak forest stands and the 8th forest inventory data of Shanxi Province have been collected. Using the field measurement data, the relationship between stand volume and biomass is established with an accuracy test. By applying the relationship and a specific carbon concentration coefficient to the forest inventory data, the carbon sequestration of oak forests in Shanxi Province is estimated. The results show that the total carbon sequestration of the local oak forests is 16.19 × 106 t. Among the forests in different age classes, the mid-aged and premature forests are acting as the major carbon sink, with their carbon sequestration accounting for 28.2% and 44.2% of the total amount respectively.

scholarly journals Allometric equation of local bamboo for estimating carbon sequestration of bamboo riparian forest

2021 ◽  
Vol 905 (1) ◽  
pp. 012002
Author(s):  
C Prayogo ◽  
C Muthahar ◽  
R M Ishaq
Keyword(s):  
Land Use ◽  
Carbon Sequestration ◽  
Riparian Forest ◽  
Dry Weight ◽  
Allometric Equation ◽  
Total Carbon ◽  
Destructive Sampling ◽  
Industrial Activities ◽  
Bamboo Stem ◽  
The Relationship

Abstract The cause of global warming is the increasing carbon concentration arising from industrial activities, burning of fossils, and land-use change. The purpose of this research was to find out the allometric equation to calculate the local bamboo biomass and then to be able to calculate how much carbon sequestration at bamboo riparian forest since this area was rarely being explored. The parameters observed were the height and diameter of the bamboo stem at 1.3 m height of 6 types of local bamboo using destructive sampling, along with the measurement of bamboo weight. The carbon content of the bamboo biomass, litter, and soil was measured to complement the estimation of total carbon sequestration. The results showed that the allometric equation for estimating local bamboo biomass is Y=0.6396 X1.6162 with R2=0.77, obtained from the relationship equations between dry weight and the diameter. Total carbon sequestration of this system ranged between 81 to 215 tons C ha−1.

scholarly journals HUBUNGAN VOLUME TEGAKAN DENGAN KANDUNGAN BIOMASSA TERSIMPAN SKALA PLOT PADA AREAL AGROFORESTRY DUSUNG DI DUSUN TOISAPU KOTA AMBON

2019 ◽  
Vol 3 (1) ◽  
pp. 40-54
Author(s):  
Ivan Passal ◽  
Gun Mardiatmoko ◽  
Fransina Latumahina
Keyword(s):  
Carbon Content ◽  
Total Carbon ◽  
Total Biomass ◽  
Tree Biomass ◽  
Community Forest ◽  
Total Carbon Content ◽  
Stand Volume ◽  
Plot Area ◽  
Biomass Potential ◽  
The Relationship

 The study was carried out in the Dusung Community Forest (Agroforestry) area of ​​Toisapu Negeri Hutumuri Hamlet, South Leitimur Sub-District, Ambon City in August - October 2018 to determine the relationship between stand volume and stored biomass for scale plots in dusung agroforestry areas in Toisapu Hamlet. For this reason, it begins with an inventory of potential at seedling, sapling, pole and tree levels so that information and data on the actual potential of carbon content in the dusung system are obtained based on the value of the diversity of stand volume and biomass content. The results of the three measurement plots showed that the highest biomass was seen to be dominated by Durian, Pala and Langsat and Duku and Clove plants. Based on the calculation of the biomass value of the total carbon content in the three plots, it can be seen biomass potential for a total 400 m² plot area or 0.04 ha for the three plots with an area of ​​1,200 m² or 0.12 ha having a total biomass of 50,783.77 Kg / m² multiplied by the assumption of 0.5% of the total amount of tree biomass and poles so that the total carbon content stored in the three plots is 25,391.88 kg / m² or 2,539.19 tons / ha.

scholarly journals Tropical carbon sink accelerated by symbiotic dinitrogen fixation

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jennifer H. Levy-Varon ◽  
Sarah A. Batterman ◽  
David Medvigy ◽  
Xiangtao Xu ◽  
Jefferson S. Hall ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Carbon Sink ◽  
Carbon Accumulation ◽  
Total Carbon ◽  
Nitrogen Fixing ◽  
Light Competition ◽  
Fixation Effect ◽  
Limiting Nutrient ◽  
Individual Trees ◽  
Nitrogen Fixing Trees

AbstractA major uncertainty in the land carbon cycle is whether symbiotic nitrogen fixation acts to enhance the tropical forest carbon sink. Nitrogen-fixing trees can supply vital quantities of the growth-limiting nutrient nitrogen, but the extent to which the resulting carbon–nitrogen feedback safeguards ecosystem carbon sequestration remains unclear. We combine (i) field observations from 112 plots spanning 300 years of succession in Panamanian tropical forests, and (ii) a new model that resolves nitrogen and light competition at the scale of individual trees. Fixation doubled carbon accumulation in early succession and enhanced total carbon in mature forests by ~10% (~12MgC ha−1) through two mechanisms: (i) a direct fixation effect on tree growth, and (ii) an indirect effect on the successional sequence of non-fixing trees. We estimate that including nitrogen-fixing trees in Neotropical reforestation projects could safeguard the sequestration of 6.7 Gt CO2 over the next 20 years. Our results highlight the connection between functional diversity of plant communities and the critical ecosystem service of carbon sequestration for mitigating climate change.

scholarly journals Assessment of Carbon Sequestration Potential of some Selected Urban Tree Species

2021 ◽  
Author(s):  
Ezekiel Ajayi
Keyword(s):  
Carbon Sequestration ◽  
Tree Species ◽  
Carbon Sink ◽  
Total Carbon ◽  
Acacia Auriculiformis ◽  
Gmelina Arborea ◽  
Individual Tree ◽  
Urban Tree ◽  
Sequestration Potential ◽  
Exotic Tree

Tree species carbon assessment and quantification remain the only opportunity to determine the position of forest in climate change amelioration potentials. Forest biomass constitutes the largest terrestrial carbon sink and accounts for approximately 90% of all living terrestrial biomass. The aim of this study is to assess tree species carbon sequestration potentials of selected urban tree species. The study was carried out in Adekunle Ajasin University Campus, Akungba Akoko, Ondo State, Nigeria. All trees species ≥10 cm Diameter at Breast Height (Dbh) within the area were identified and their Dbh measured as well as other variables for volume computation such as height, diameters at the base, middle and top. Also, for density assessment; stem core samples were collected. Again, the coordinate of individual tree was recorded using a Global Positioning System (GPS) receiver. A total of 124 individual trees were encountered with varying growth variables as well as carbon values. The study area contains some indigenous and exotic tree species such as Acacia auriculiformis, Terminalia mantily, Gmelina arborea and Tectona grandis etc. but Acacia auriculiformis had the highest frequency. The tree species with highest carbon sequestration was Gmelina arborea as recorded for this study. The total carbon and carbon dioxide sequestered in the study area were reported as 47.94 kg and 176.03 kg respectively.

scholarly journals Estimating the Potential of Carbon Sequestration in Tree Species of Chintapalle Forest Range, Narsipatnam Division, Visakhapatnam, Andhra Pradesh, India

2021 ◽  
Vol 20 (5) ◽  
Author(s):  
Korra Simhadri ◽  
Syam Kumar Bariki ◽  
A.V.V.S. Swamy
Keyword(s):  
Carbon Sequestration ◽  
Tree Species ◽  
Co2 Sequestration ◽  
Minimum Weight ◽  
Predictor Variable ◽  
Total Carbon ◽  
Carbon Sequestration Potential ◽  
Sequestration Potential ◽  
Bambusa Vulgaris ◽  
The Relationship

The potential of carbon sequestration of tree species in the Chintapalle forest range, of Narsipatnam Division, was estimated by using a non-destructive method. The sequestration of 6033 trees belonging to 22 species was investigated; the approximate height of tree species and the diameter at breast height (DBH) were measured for the estimation of CO2 sequestration. The maximum weight of carbon was observed in Pongamia pinnata (L.) Pierre species i.e (37987.06 kg) and the minimum weight of carbon was noted in Phyllanthus emblica L. species i.e is (61.8kg). The total carbon sequestrated by the entire tree species was (2370614.0 kg), The average carbon sequestered was (39865.81 kg). The highest sequestration was noted in the species P. pinnata (L.) Pierre i.e. (139271.95 kg) and the lowest (226.79 kg) was noted in the species P. emblica L. The maximum average DBH with maximum carbon sequestration potential was observed in Ficus benghalensis L. species, with higher total green (AGW) observed in all sites, whereas minimum average DBH with minimum carbon sequestration potential was noted in Bambusa vulgaris species. The regression analysis tests the relationship between two variables. The height of trees has no significant impact on the amount of CO2 sequestered F (32085087175.84, 12946607900) = 2.478262; P ? 0.05, which indicates that the tree height plays an insignificant role in CO2 sequestration (? = 2713.28 P ? 0.05). The dependent variable CO2 sequestered was also regressed on the predictor variable soil organic carbon (SOC) to test the relationship. SOC insignificantly predicted CO2 sequestrated F (5.83, 2.62) = 0.2236; P ? 0.25, indicating that the SOC has an insignificant role in CO2 sequestration (? = 102780.3 P ? 0.05). Insignificant relation was observed between the parameters SOC and height of tree species to the rate of carbon dioxide sequestered, and gave a regression equation of y = 10278x + 50863 with R2 = 0.100; y=2713.285803x-209800.8762 with R2 = 0.55

Multi-peaked directional wave spectra based on extensive field measurement data in the Gulf of Oman

2021 ◽  
Vol 230 ◽  
pp. 109057
Author(s):  
Mohammad Adibzade ◽  
Mehdi Shafieefar ◽  
Hassan Akbari ◽  
Roozbeh Panahi
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Wave Spectra ◽  
Gulf Of Oman ◽  
Extensive Field ◽  
Directional Wave

Mid upper arm circumference as an alternative measure to assess the nutritional status of adolescents: a study in India based on NFHS-4 data

2021 ◽  
pp. 1-12
Author(s):  
Aparna Roy ◽  
T. V. Sekher
Keyword(s):  
Nutritional Status ◽  
Sensitivity And Specificity ◽  
Measurement Data ◽  
Anthropometric Measurement ◽  
Alternative Measure ◽  
Upper Arm ◽  
Male Adolescents ◽  
Arm Circumference ◽  
Mid Upper Arm Circumference ◽  
The Relationship

Abstract Use of body mass index (BMI) to assess the nutritional status of adolescents requires many resources, especially for country-level assessment. This study aimed to determine the relationship between BMI and mid upper arm circumference (MUAC) among adolescent males and females in India and to examine whether MUAC effectively represents the nutritional status of adolescents. The study utilized anthropometric measurement data collected by India’s National Family Health Survey-4 (2015–16). The weighted sample for analysis included 91,315 female and 14,893 male adolescents. The BMI and MUAC measurements showed a positive correlation in both female and male adolescents. Using BMI-for-age Z-score classifications, 12.7% of the adolescents were undernourished. Using MUAC (in cm) as per NACS (Nutrition Assessment, Counselling, and Support) guidelines and Mramba et al. (2017) classified 22.9% and 3.7% of the adolescents as undernourished respectively. Finally, using the MUAC-for-age Z-score classification, 98.4% of adolescents were determined to be normal and 1.7% undernourished. Sensitivity and specificity tests of the MUAC cut-offs, in comparison with BMI cut-offs, showed that all three MUAC cut-off classifications had high specificity (NACS cut-off: 81.3%; Mramba et al. cut-off (cm): 97.7%; Mramba et al. cut-off (Z-score): 99.1%). The NACS cut-off had moderately high sensitivity (52.2%) but the Mramba et al. cut-offs had low sensitivity (13.3% for the centimetre cut-off and 6.6% for the Z-score cut-off). Sensitivity and specificity tests proved the relationship between BMI and MUAC, and that MUAC represents adolescent nutritional status with considerable efficiency. With further research, it may be established that MUAC is a better and promising measure of adolescent nutrition, having the advantage of needing fewer resources for data collection. The MUAC has the potential to offer a simple and low-resource alternative to BMI to assess nutritional status among adolescents in poor countries.

scholarly journals A Field Measurement Based Wind Characteristics Analysis of a Typhoon in Near-Ground Boundary Layer

Atmosphere ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 873
Author(s):  
Dandan Xia ◽  
Liming Dai ◽  
Li Lin ◽  
Huaifeng Wang ◽  
Haitao Hu
Keyword(s):  
Turbulence Intensity ◽  
Field Measurement ◽  
Three Dimensional ◽  
Wind Data ◽  
Statistical Characteristics ◽  
Gust Factor ◽  
Characteristics Analysis ◽  
Wind Characteristics ◽  
The Mean ◽  
The Relationship

The field measurement was conducted to observe the wind field data of West Pacific typhoon “Maria” in this research. With the application of ultrasonic anemometers installed in different heights (10 m, 80 m, 100 m) of the tower, the three dimensional wind speed data of typhoon “Maria” was acquired. In addition, vane-type anemometers were installed to validate the accuracy of the wind data from ultrasonic anemometers. Wind characteristics such as the mean wind profile, turbulence intensity, integral length scale, and wind spectrum are studied in detail using the collected wind data. The relationship between the gust factor and turbulence intensity was also studied and compared with the existing literature to demonstrate the characteristics of Maria. The statistical characteristics of the turbulence intensity and gust factor are presented. The corresponding conclusion remarks are expected to provide a useful reference for designing wind-resistant buildings and structures.

scholarly journals Evaluating the Potential of Commercial Forest Inventory Data to Report on Forest Carbon Stock and Forest Carbon Stock Changes for REDD+ under the UNFCCC

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Danae Maniatis ◽  
Yadvinder Malhi ◽  
Laurent Saint André ◽  
Danilo Mollicone ◽  
Nicolas Barbier ◽  
...  
Keyword(s):  
Carbon Stock ◽  
Measurement Data ◽  
Forest Carbon ◽  
Phase 2 ◽  
Inventory Data ◽  
Ecological Data ◽  
Phase 3 ◽  
Forest Carbon Stock ◽  
Commercial Logging ◽  
Commercial Forest

In the context of the adoption at the 16th Conference of the Parties in 2010 on the REDD+ mitigation mechanism, it is important to obtain reliable data on the spatiotemporal variation of forest carbon stocks and changes (called Emission Factor, EF). A re-occurring debate in estimating EF for REDD+ is the use of existing field measurement data. We provide an assessment of the use of commercial logging inventory data and ecological data to estimate a conservative EF (REDD+ phase 2) or to report on EF following IPCC Guidance and Guidelines (REDD+ phase 3). The data presented originate from five logging companies dispersed over Gabon, totalling 2,240 plots of 0.3 hectares.We distinguish three Forest Types (FTs) in the dataset based on floristic conditions. Estimated mean aboveground biomass (AGB) in the FTs ranges from 312 to 333 Mg ha−1. A 5% accuracy is reached with the number of plots put in place for the FTs and a low sampling uncertainty obtained (± 10 to 13 Mg ha−1). The data could be used to estimate a conservative EF in REDD+ phase 2 and only partially to report on EF following tier 2 requirements for a phase 3.

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