Bulletin

wall bulletin
Southern ChinaChina

Authors: 超级管理员 | Edit: Miao

OK with me at 05:37:50 CST Thursday, 15 February 2018

Based mostly on the regional NDVI profile, CropWatch assesses the condition of crops in Southern China as below the 5YA. NDVI value was below average in October, November, December, and January, although it was just only above average or remaining average in late-December and late-January. According to  weather data,  Southern China suffered from heavy snowfall and cold temperature during reporting period. 

According to the agroclimatic and agronomic indexes, Southern China experienced average rainfall and temperature (RAIN, +1%; TEMP,-0.2℃). The radiation (RADPAR) was significantly below average (-13%).  The potential biomass was close to average too (BIOMSS,+4%) and so was the cropped arable land fraction (CALF,-1%). The maximum VCI was 0.68 indicating an unfavorable crop condition. The averages hide a lot of sub-regional variability and differences. 

As shown by NDVI clusters and maps, NDVI was close average from October to December  throughout the region. Only about 3% (a small  zone in Guangxi) had a drop in NDVI in January.  This behavior may be related to deficit in rainfall (RAIN, -13%), inadequate radiation (RADPAR -21%) but average temperature (-0.4℃) in Guangxi. In Guangdong, rainfall and biomass were both 10% above average while TEMP was average (-0.3℃). RADPAR was well below expectations (-15%). Similar situations also occurred in Yunnan and Fujian. According to VCIx and the biomass anomaly map,  crop condition was poor in Southern China.

Figure 4.12. Crop condition Southern China region, October 2017-January 2018

 

(a) Crop condition development graph based on NDVI

 

(b) Spatial NDVI patterns compared to 5YA                               (c) NDVI profiles

 

(d) Maximum VCI

 

(e) Biomass



有关逻辑连接词的问题,我已部分采纳。在认为没有逻辑错误的地方没有修改。另外右侧图名也更正成了最终出版时的图名。谢谢赵博士的建议。