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Authors: 超级管理员 | Edit: yannn
Chapter 2 presents the same indicators—RAIN, TEMP, RADPAR, and BIOMSS— as those used in Chapter 1, and combines them with the agronomic indicators—cropped arable land fraction (CALF), maximum vegetation condition index (VCIx), and minimum vegetation health index (VHIn)— to describe crop condition in six Major Production Zones (MPZ) across all continents. For more information about these zones and methodologies used, see the quick reference guide in Annex B as well as the CropWatch bulletin online resources at http://www.cropwatch.com.cn/htm/en/bullAction!showBulletin.action#.
2.1 Overview
Tables 2.1 and 2.2 present an overview of the agroclimatic (Table 2.1) and agronomic (Table 2.2) indicators for each of the six MPZs, comparing the indicators to their fifteen-year and five-year averages, respectively. The text mostly refers simply to "average" with the averaging period implied.
Table 2.1 Agroclimatic indicators by Major Production Zone, current value and departure from 15YA (October 2020-January 2021)
RAIN | TEMP | RADPAR | BIOMSS | |||||
Current | Departure from 15YA (%) | Current | Departure from 15YA (°C) | Current | Departure from 15YA (%) | Current | Departure from 5YA (%) | |
(mm) | (°C) | (MJ/m2) | (gDM/m2) | |||||
West Africa | 167 | -21 | 25.4 | 0.4 | 1194 | -3 | 402 | -10 |
North America | 268 | -13 | 6.0 | 0.7 | 527 | -1 | 127 | -1 |
South America | 471 | -48 | 23.7 | 0.6 | 1346 | 3 | 810 | -1 |
South and SE Asia | 315 | 10 | 20.7 | 0.1 | 970 | -5 | 319 | -15 |
Western Europe | 426 | 20 | 5.8 | 0.2 | 278 | -10 | 69 | -13 |
C. Europe and W. Russia | 233 | -10 | 0.9 | 0.9 | 223 | -3 | 48 | 6 |
Note: Departures are expressed in relative terms (percentage) for all variables, except for temperature, for which absolute departure in degrees Celsius is given. Zero means no change from the average value; relative departures are calculated as (C-R)/R*100, with C=current value and R=reference value, which is the fifteen-year average (15YA) for the same period (October-January) for 2006-2020.
Table2.2 Agronomic indicators by Major Production Zone, current season values and departure from 5YA (October 2020-January 2021)
Cropped arable land fraction | Maximum VCI | ||
Current | Departure from 5YA (%) | Current | |
West Africa | 95 | 2 | 0.95 |
North America | 61 | -11 | 0.73 |
South America | 98 | 0 | 0.86 |
South and SE Asia | 97 | 2 | 0.90 |
Western Europe | 92 | 2 | 0.92 |
C Europe and W Russia | 73 | 1 | 0.84 |
Note: See note for Table 2.1, with reference value R defined as the five-year average (5YA) for the same period (October to January) for 2016-2020.