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Authors: 超级管理员 | Edit: xingqiang
This analysis covers the late stages of sugar beets (December harvest) and the early vegetative stages of winter wheat, winter barley, and rapeseed. According to HGCA crop updates, by the end of November 2013, 94 percent of intended wheat area was planted and the planting of winter barley and winter oil seed rape had been completed. The United Kingdom presents abnormal weather conditions in this period with an increase of all CropWatch environmental indices, especially rainfall (up 43 percent compared with both the recent five years and the 2001-2013 average). These observations are supported by the NOAA NCDC report on climate anomalies and the JRC/MARS bulletin, which suggested that the national mean temperature during December 2013 was the warmest since 1988 and that the country continued to have wetter than average conditions in January. Based on this period, the biomass at the national scale is expected to increase by 14 percent compared with the last five years, assuming favorable conditions prevail from now on wards. This is consistent with the interpretation of the NDVI profile (e), which shows that the national NDVI average is well above the recent five-year average and close to the five-year maximum value. According to the NDVI clusters, from November on wards,the NDVI values across the country are above average. The southwest and southeast regions present a NDVI decrease from November to December due to excess water, but have since recovered. A shift from positive departure to negative departure of biomass from south to north is observed in figure (d).
Figure 3.12. United Kingdom crop condition , Oct. 2013-Jan. 2014 (a) |