%0 Journal Article %A CHEN Yanli %A HUANG Siqi %A MO Jianfei %A LUO Yongming %A MENG Liangli %A KUANG Zhaomin %T Comparison of Drought Monitoring Standards of Sugarcane Based on CLDAS Data: A Case of Drought in Guangxi in 2011 %D 2020 %R 10.11755/j.issn.1006-7639(2020)-02-0188 %J Journal of Arid Meteorology %P 188-194 %V 38 %N 2 %X Based on retrieved soil volumetric moisture content of CLDAS (land data assimilation system of China Meterological Administration), extracted field capacity of HWSD (harmonized world soil database) from FAO and Vienna International Apply System Institute and ten-daily soil relative moisture observation data at 15 agro-meterological stations of Guangxi, the soil relative humidity of CLDAS was calculated and tested. Combined with the statistics data of drought disaster, the drought in sugarcane planting area of Guangxi from summer to fall in 2011 was monitored and evaluated by using the agricultural drought grades and sugarcane drought levels classification standards. And on this basis, the sugarcane drought monitoring indicators of CLDAS were adjusted, and it was applied in the monitoring of drought. The results show that the retrieved soil relative humidity of CLDAS was better consistent with ground observation data from agro-meterological stations. The correlation coefficients were from 0.62 to 0.87, and RMSE was from 7.9% to 16.7%. The classification standards of agricultural drought grades and sugarcane drought levels underestimated the drought in 2011 in Guangxi, especially for agricultural drought grades, while the adjusted monitoring index of CLDAS could reflect the drought and its evolution process in sugarcane planting area well, and the percentage of absolute error with statistical drought disaster area was less than 8%. %U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2020)-02-0188