Pacific Decadal Oscillation (PDO) is a pressure pattern
alternating over the Pacific with "warm" and "cold" phases (Newman, et al., 2016),
each lasting between 20 and 30 years. For nearly 100 years, it has appeared in
two complete cycles. The "cold phase" of two cycles occurred
from 1890 to 1924 and from 1947 to 1976;while these of
"warm phase" were from 1925 to 1946 and from 1977 to the late1990s.
During the rapid increase of the Antarctic ozone hole from 1978 to 2000, it was in the warm phase of the PDO phenomenon. During the rapid contraction of the Antarctic ozone hole in 1957-1976 and 2002-2004, it was in the cold phase of PDO phenomenon. It can be seen that the Antarctic ozone hole may have relation to the high air pressure flow, which is first and foremost a natural phenomenon.
During the rapid increase of the Antarctic ozone hole from 1978 to 2000, it was in the warm phase of the PDO phenomenon. During the rapid contraction of the Antarctic ozone hole in 1957-1976 and 2002-2004, it was in the cold phase of PDO phenomenon. It can be seen that the Antarctic ozone hole may have relation to the high air pressure flow, which is first and foremost a natural phenomenon.
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