The changes in the atmosphere and climate influence soils by disturbing the functioning of hydrologic and biogeochemical cycles, specifically that of Carbon (C). The impact of the climatic change on soil organic carbon (SOC) stocks over a semi-arid region of India (Medak district, Telangana) was assessed using remote sensing-based indices and geostatistical modeling. The global soil organic carbon (GSOC) stocks (0–30 cm depth) at 1 km spatial resolution and a set of environmental variables like Normalized difference vegetation index (NDVI), Net primary productivity (NPP), slope, elevation and various climate parameters such as rainfall, temperature, etc., were used to estimate the SOC stocks in current and future (2050 and 2070) climate change projections using regression kriging (RK) technique. The results of the study indicate that among the environmental covariates rainfall was the predominant factor that controls the SOC stocks in the study region. The current SOC stock in the study area was estimated as 25.4 Tg in top 0–30 cm depth. The future (2050 and 2070) SOC stocks were predicted using climate parameters of three Global Circulation Models (GCMs); namely CCSM4, HadGEM2-AO, and HadGEM2-ES. Results show a reduction in SOC stocks in 2050 and 2070 due to the projected climate change in the study region. The projected decrease in total SOC stocks varies from 1.12 to 4.93 and 0.45 to 4.49 Tg by 2050 and 2070 respectively. The uncertainty associated with the prediction of the current stock of SOC was 8.44%. The uncertainties associated with the SOC prediction in various future climate change scenarios for the year 2050 and 2070 were in the range of 8.83–10.48% and 8.15–10.26% respectively.

中文翻译：

---

评估半干旱地区气候变化对土壤有机碳影响的地理空间方法

大气和气候的变化会干扰水文和生物地球化学循环的功能，特别是碳（C）的功能，从而影响土壤。使用基于遥感的指数和地统计学模型，评估了气候变化对印度半干旱地区（Telangana的Medak区）土壤有机碳（SOC）储量的影响。1 km空间分辨率下的全球土壤有机碳（GSOC）储量（0–30 cm深度）和一组环境变量，例如归一化差异植被指数（NDVI），净初级生产力（NPP），坡度，海拔和各种气候参数例如降雨，温度等，使用回归克里金（RK）技术估算了当前和未来（2050年和2070年）气候变化预测中的SOC存量。研究结果表明，在环境协变量中，降雨是控制研究区域SOC储量的主要因素。在研究区域中，当前的SOC储量在0-30 cm的最深处估计为25.4 Tg。使用三种全球循环模型（GCM）的气候参数预测了未来（2050年和2070年）的SOC存量。即CCSM4，HadGEM2-AO和HadGEM2-ES。结果表明，由于研究区域的预计气候变化，2050年和2070年的SOC储量将减少。到2050年和2070年，SOC总储量的预计减少量分别为1.12至4.93 Tg和0.45至4.49 Tg。与SOC当前存量的预测相关的不确定性为8.44％。