年型 | 辽宁 | 内蒙古东部 | 黑龙江 | 吉林 |
第1相似年 | 90.3 | 93.9 | 91.8 | 91.9 |
第2相似年 | 90.9 | 93.7 | 91.4 | 91.7 |
第3相似年 | 90.3 | 93.6 | 92.4 | 91.8 |
综合相似年 | 91.2 | 94.1 | 93.4 | 92.4 |
Citation: | Liu Wei, Song Yingbo. A daily meteorological impact index of maize yield based on weather elements. J Appl Meteor Sci, 2022, 33(3): 364-374. DOI: 10.11898/1001-7313.20220310. |
Table 1 Average accuracy of 10 years under the different similar yearsin Northeast China from 2011 to 2020 (unit:%)
年型 | 辽宁 | 内蒙古东部 | 黑龙江 | 吉林 |
第1相似年 | 90.3 | 93.9 | 91.8 | 91.9 |
第2相似年 | 90.9 | 93.7 | 91.4 | 91.7 |
第3相似年 | 90.3 | 93.6 | 92.4 | 91.8 |
综合相似年 | 91.2 | 94.1 | 93.4 | 92.4 |
Table 2 Monthly average forecast accuracy in Northeast China from 2011 to 2020 (unit:%)
月份 | 辽宁 | 内蒙古东部 | 黑龙江 | 吉林 |
5 | 89.9 | 94.1 | 91.6 | 92.2 |
6 | 89.9 | 94.4 | 92.5 | 92.5 |
7 | 89.7 | 94.4 | 93.5 | 92.0 |
8 | 92.5 | 94.1 | 95.1 | 92.5 |
9 | 93.8 | 93.5 | 94.4 | 92.6 |
Table 3 Forecast accuracy in Northeast China on 31 Jul and 31 Aug from 2011 to 2020 (unit:%)
年份 | 辽宁 | 内蒙古东部 | 黑龙江 | 吉林 | |||||||
07-31 | 08-31 | 07-31 | 08-31 | 07-31 | 08-31 | 07-31 | 08-31 | ||||
2011 | 94.2 | 94.5 | 83.3* | 89.3* | 95.1 | 98.4 | 95.9 | 95.2 | |||
2012 | 95.9 | 98.7 | 91.7 | 94.2 | 95.0 | 98.9 | 92.0 | 91.1 | |||
2013 | 87.7* | 89.9* | 99.1 | 96.7 | 94.8 | 90.3 | 94.5 | 93.2 | |||
2014 | 73.8* | 83.2* | 86.3* | 86.3* | 91.3 | 93.3 | 91.9 | 98.3 | |||
2015 | 96.2 | 96.2 | 93.3 | 89.8* | 89.0* | 87.8* | 93.6 | 95.5 | |||
2016 | 91.2 | 93.9 | 95.9 | 96.7 | 92.8 | 97.5 | 93.4 | 90.9 | |||
2017 | 91.2 | 92.4 | 99.6 | 96.7 | 92.2 | 93.7 | 90.5 | 96.1 | |||
2018 | 99.5 | 99.7 | 99.9 | 99.2 | 97.6 | 98.4 | 80.7* | 85.7* | |||
2019 | 84.8* | 90.6 | 98.5 | 95.5 | 94.1 | 94.2 | 92.9 | 89.8* | |||
2020 | 93.4 | 95.0 | 97.6 | 95.8 | 100.0 | 90.6 | 93.6 | 90.0 | |||
注:*表示逐日预报准确率低于90%。 |
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