According to satellite data, changes in vegetation index were most
pronounced from 2015 to 2020, which was related to changes in
temperature. In other words, global warming speeds up the beginning of
spring.
From March 24 to March 29, 2023, we experienced that the cherry
blossom season at school came five days earlier than last year. This means
that spring comes earlier than the past. Then we started wondering
whether the flowering season was different from the past. Hence, we use
NDVI to investigate how the flowering season changes and its relationship
with climate change!
Conclusions
Hyoam High school
Team leader : Sangun Lee / kepler84@naver.com
Results
Introduction
To see how spring is changing, we calculate the NDVI that changes over
time, We decided to check the following NDVI.
We analyzed the change trend of NDVI by analyzing a total of six
periods from 2005, 2010, 2015, 2020, and 2023 in Gyeongsangnam-do
and hanbando where we currently live in.
Study Area
*Satellite used : Modis-Terra, Sentinel-2
*Progress :
1. Select the region and time to calculate the NDVI
2. Observe the changing temperature of the times
3. Analyze the correlation between climate change and NDVI
*Using Temperature sum : Sum of the average daily temperature for
the start of flowering
Methods
In memory of Devorah Blumberg
SHE SPACE *South Korea*TEAM: Daeun Kim, Taegyeong Kim,
Yelan lee, Nakyeoung kim, jiin Lee, Gaeun Jo,
Yuhyun Oh, Sieon Kim
Your
Institutional
Logo here
The most obvious change in satellite data we investigated was
between 2015 and 2020.
Comparing the same day every year, the NDVI index seen on
the satellite darkens as vegetation grows faster.
As a result of comparing the sum of temperatures of cherry
blossoms between 2015 and 2020, there was a difference of
43.7 degrees on March 25th and 29.6 degrees on April 5.
In 2020, it
’s already filled the sum of temperature needed for
cherry blossoms
’s flowering on the 87th with Julian dating, and
on the 56th with Julian dating, it
’s already filled the sum of
temperature needed for forsythia
’s flowering. On the other hand,
in 2015, the sum of temperature is far less than in 2020.