One of the biggest and most common effects of global climate change is drought. As climate warming and precipitation change, the possibility of drought increases. These droughts do not occur anywhere, but where it happens, it can be much more serious than before. ForestGEO found that it is a bigger, older tree - the most carbon-rich tree - and when their local ecosystems are depleted they tend to suffer more. It is because it is more difficult to raise the water to a very high place. Crowns of big trees will also be higher and higher, so they will be affected by the high temperature of the sun, high wind speed and low humidity. Small trees are protected by surrounding trees
Every week the US drought monitoring provides a way to calculate the drought severity and coverage index and calculate the severity and degree of drought in the whole country numerically. Higher values indicate that wider land experienced drought. DSCI has reached over 115 in the last 6 weeks and has reached more than 100 in most of 2018. This indicates that rainfall is low nationwide. A wide range of abnormal drought or drought was in 2015 when we finally saw such a long depth
In the 1950s, another serious drought year in the United States occurred. These droughts continued from the drought of the 1950s and 1951 in the southwest part of the United States of America in the 1940s, New Mexico, Texas, and in particular in the central plains, the Midwest, and certain Rocky mountainous countries in 1953 It was. Between 1957 and 1957, the drought index in the central Nebraska province reached -7, which was 3 points below the extreme drought index. From 1950 to 1957, Texas experienced the worst drought ever. By the end of the drought, 244 out of the 254 counties in Texas province were declared federal disaster areas. California drought became particularly serious, and in 1953 several natural lakes were completely dried up. 1958 - 1959 Southern California was severely damaged by drought and water resources were seriously damaged