Soil Organic Carbon Stock Prediction: Fate under 2050 Climate Scenarios, the Case of Eastern Ethiopia
نویسندگان
چکیده
Soil Organic carbon (SOC) is vital to the soil’s ecosystem functioning as well improving soil fertility. Slight variation in C has significant potential be either a source of CO2 atmosphere or sink stored form organic matter. However, modeling SOC spatiotemporal changes was challenging due lack data represent high spatial heterogeneity properties. Less expensive techniques, digital mapping (DSM) combined with space-for-time substitution (SFTS), were applied predict present and projected stock for temperature rainfall projections under different climate scenarios represented by four Representative Concentration Pathways (RCPs): RCP2.6, RCP4.5, RCP6, RCP8.5). The relationship between environmental covariates (n = 16) measured (148 samples) developed using random forest model. Then, temporal over baseline top 30 cm depth selected districts (Chiro Zuria, Kuni, Gemechis Mieso) West Hararghe Zone at m resolution. model validation sample 20% showed that explained 44% variance (R2) root mean square error (RMSE) 8.96, (ME) 0.16, Lin’s concordance correlation coefficient (CCC) 0.88. Temperature most important predictor factor influencing distribution stock. An overall net gain expected study area 2050. areas lower counterbalanced loss higher depended on land use cover (LULC), type, agro-ecological zones. By 2050, cropland supposed lose its all RCPs; therefore, appropriate decisions are crucial compensate C.
منابع مشابه
The Effect of Land use and Soil Erosion on Soil Organic Carbon and Nitrogen Stock
Soil organic carbon (SOC) is a principal component in soil quality assessment. Knowledge of SOC and total nitrogen (TN) stocks are important keys to understand the role of SOC in the global carbon cycle and, as a result, in the mitigation of global greenhouse effects. SOC and TN stocks are functions of the SOC concentration and the bulk density of the soil that are prone to changes, influe...
متن کاملSimulated responses of soil organic carbon stock to tillage management scenarios in the Northwest Great Plains
BACKGROUND Tillage practices greatly affect carbon (C) stocks in agricultural soils. Quantification of the impacts of tillage on C stocks at a regional scale has been challenging because of the spatial heterogeneity of soil, climate, and management conditions. We evaluated the effects of tillage management on the dynamics of soil organic carbon (SOC) in croplands of the Northwest Great Plains e...
متن کاملThe Effect of Zahab Plain Floodwater Spreading on Soil Organic Carbon Stock
Floodwater spreading (FWS) has an important role in floodwater control, groundwater recharge, restoration and enhancement of vegetation and desertification control. Since the flood causes the transporting of soil particles including organic materials, the floodwater spreading project can be a suitable place to sequestration of organic carbon in sediment yielded by flood. The knowledge of soil o...
متن کاملSoil organic carbon dynamics jointly controlled by climate, carbon inputs, soil properties and soil carbon fractions.
Soil organic carbon (SOC) dynamics are regulated by the complex interplay of climatic, edaphic and biotic conditions. However, the interrelation of SOC and these drivers and their potential connection networks are rarely assessed quantitatively. Using observations of SOC dynamics with detailed soil properties from 90 field trials at 28 sites under different agroecosystems across the Australian ...
متن کاملPrediction of Climate Change in Western of Iran using Downscaling of HadCM3 Model under Different Scenarios
Abstract Considering that water resources are at risk from climate change, the study of temperature and precipitation changes in the coming years can lead to droughts such as droughts, sudden floods, high evaporation and environmental degradation. To this end, global climate models (GCMs) are designed to assess climate change. The outputs of these models have low spatial accuracy. In order ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Sustainability
سال: 2023
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su15086495