Yu Shuqiu, Lin Xuechun. Abrupt change of drorght/flood for the last 522 years in the middle reaches of Yellow River. J Appl Meteor Sci, 1996, 7(1): 89-95.
Citation:
Yu Shuqiu, Lin Xuechun. Abrupt change of drorght/flood for the last 522 years in the middle reaches of Yellow River. J Appl Meteor Sci, 1996, 7(1): 89-95.
Yu Shuqiu, Lin Xuechun. Abrupt change of drorght/flood for the last 522 years in the middle reaches of Yellow River. J Appl Meteor Sci, 1996, 7(1): 89-95.
Citation:
Yu Shuqiu, Lin Xuechun. Abrupt change of drorght/flood for the last 522 years in the middle reaches of Yellow River. J Appl Meteor Sci, 1996, 7(1): 89-95.
The summer dryness/wetness grades series for the last 522 years (1470~1991) in the middle reaches of Yellow River are analysed by T test. The results indicate that there are two abrupt changes with 100-year scale in this region, around 1650’s (from drought to flood) and in the early 1760’s (from flood to normal). There are also jumps of 20~30 year scale within the 100-year scale variations. It is also found that the drought/flood in the region are associated with the evolution of atmospheric active centers and the Sea Surface Temperature Index (SSTI) of the equatorial East Pacific.
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