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Authors: 超级管理员 | Edit: zhangxin
Crops in the United Kingdom showed averageconditions during this reporting period. Currently, summer crops have beenharvested, and winter crops (wheat and barley) are at theplanting stage. Compared to averages, the CropWatch agroclimaticindicators show that rainfall over the reporting period was below average(RAIN, -5%), with slightly below average radiation (RADPAR, -3%)and temperature (TEMP, -1.7°C). With water stress and lowtemperatures, BIOMSS decreased by 7% compared to the five-year averageat the national scale. As a result of adequate rainfall from late July tolate august, the national NDVI values were average and above the five-yearaverage from late July to early September according to the crop conditiondevelopment graph. For early July and late September, due to reduced rainfalland colder weather, the national NDVI values dropped to below average. SpatialNDVI patterns compared to the five-year average show low values from lateSeptember (1) along the eastern and southern coast, including south ofDorset and Hampshire, east of Lincolnshire, Yorkshire and Grampian, southeastof Tayside and Lothian and low values from July in (2) Worcestershire,Warwickshire, Staffordshire, Northamptonshire, Leicestershire andGloucestershire. Corresponding NDVI departure cluster profiles and appropriaterainfall from late July to October indicate above average NDVI values overthe country for over 76% of arable land (Oxford, Cambridge, York, Birmingham,Edinburgh). The spatial pattern is also reflected by the maximum VCI inthe different areas, with a VCIx of 0.8 for the country overall.
Figure 3.14. United Kingdomcrop condition, July-October 2015
(a)Crop condition development graph based on NDVI (c) Maximum VCI
(c)Spatial NDVI patterns compared to 5YA (d) NDVI profile