Investor Presentaiton
Climate 2020, 8, 46
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e.g., [14]). The start of the active vegetation season has shifted to an earlier date-now the beginning of
April, which is consistent with earlier studies (e.g., [33]).
The growing season duration for sugar beet (average daily temperature above 5 °C) for the period
1980-2010 increased by an average of five to seven days; however, during the period 1971-2015, the
duration of the active vegetation period increased by 7-10 days. During the same period, a statistically
significant positive trend (at the 90% confidence level) was observed (the coefficient of the linear trend
is 2 days decade¹). There have been symmetric changes in the timing for the start and end of the
active growing season. During the spring season, it arrives three to five days earlier, while in the
autumn, the period of active vegetation has been extended ending three to five days later than during
the 1950s-1970s (reference [33,34]).
Summer Temeprature Anomaly (Celsius)
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890 1900
1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Year
Figure 2. Mean temperature anomalies (°C) during the summer season in the Belgorod Region.
A quadratic fit line is shown in red (°C).
The beginning of a more meridional NH circulation regime commencing in 1998 has been
associated with an increased frequency of meteorological extremes [22,33-35], and led to more variable
conditions for crop growth interannually [14]. Reference [20] demonstrates that this recent meridional
NH flow period is significantly different from the expectation that zonal and meridional flow regimes
should occur nearly equally in frequency or from the mean long-term (1899-2018) frequency of
meridional NH flow regimes.
Dangerous agrometeorological phenomena are observed throughout the year (references [20,31])
such as prolonged anticyclonic regimes or atmospheric blocking have caused damage to crops in
the Belgorod Region. However, the frequency with which these anticyclonic regimes occur vary
interannually (e.g., [36]). In particular, the recent increase in anticyclonic atmospheric circulation
regimes has led to higher temperatures and more variable precipitation in the summer, contributing
to an increased likelihood of drought. In spite of this, the total annual mean precipitation within the
Belgorod Region has not changed significantly since the middle of the 20th century [22]. During the
warm season, there was a slight increase in mean precipitation observed, however, this was not
statistically significant (e.g., [22,33]).View entire presentation