Investor Presentaiton
Climate 2020, 8, 46
8 of 16
Large-scale atmospheric circulation has a significant influence on regional-scale surface weather
conditions and the occurrence of extreme values in meteorological parameters (e.g., [20,34-36,40]).
As such, changes and variability in the regional general circulation [14,20,22] have had a significant
impact on sugar beet yields. In order to test this, the time series for sugar beet yields and HTC
were transformed into spectral space (Figure 7a,c) and there were statistically significant (at the 95%
confidence level) peaks found for beet yield (HTC) at wave number two and seven (four, six, 13, 15, 21,
24) per 59 years. These correspond to a periodicity of about eight and 30 years (two-to-five, 10, and 15
years) in the beet yield and HTC series.
60
50
A
40
30
20
10
1955
1965
1975
1985
1995
2005
2015
2025
Year
Figure 5. Sugar beet yield (tons ha-1) over the (a) northern, (b) central and western, and (c) southeastern
districts within the Belgorod Region (see Figure 4). The solid line is the regression line for each (tons ha¯¹).View entire presentation