Similar to the previous years, thanks to Jeff Franklin from AAFC Kentville, we’re able to observe graphs showing the evolution of the climate at the beginning of the season. In this publication, it’s possible to see the degree days accumulation in the air and the estimated temperature in the soil.
The first table shows the temperature base 5⁰ C and 10⁰ C from 2018 until 2021 accumulated from March 1 until April 26. At the end of each section, it’s possible to see the average of the last 5 and 10 years respectively.
|
Category |
2018 |
2019 |
2020 |
2021 |
5 year average |
10 year average |
|
Plant development (Base 5⁰C) |
53.5 |
91.7 |
48.9 |
127.8 |
72.3 |
78.6 |
|
Insect development (Base 10⁰C) |
14.8 |
27.9 |
5.6 |
40.5 |
19.5 |
23.2 |
Figure 1. Degree day accumulations as of April 26, 2021. All data are taken from the Kentville weather station, based on a start date of March 1, and calculated using the single sine method.
Season 2021 presents the higher accumulation of degree days than
in the last years until April 26, both for 5 and 10 degrees Celsius, especially
compared with 2020. When the values are compared with the average of the last 5
and 10 years, 2021 almost duplicate the temperature accumulated based on 10⁰ C.
In the following
column graph, it’s possible to see the values from 2004 until 2021 and at the
end it’s possible to see the average of the last 5 and 10 years respectively.
Figure 2. Degree day accumulations as of April 26,
2021 base 10⁰ C.
All data are taken from the Kentville weather station, based on a start
date of March 1, and calculated using the single sine method.
In the graph it’s possible to clearly observe the difference
with the last 3 years in the accumulation based on 10⁰ C. Moreover, it’s interesting to see that 2010 and 2012 presented even higher
degree days than 2021. If you have vineyard notes from these years, it’s
a good idea to keep track and compare the main observations.
Finally, the last graph shows the estimated soil temperature
at 35 centimeters (cm) depth from 2016 until 2021 at Kentville Research station.
Figure 3. Estimate soil temperature at 35 cm from
2016 until 2021 in Kentville Research station.