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		春季热带海温与北疆夏季极端降水的关系研究
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			Study on the relationship between tropical sea surface temperature in spring and extreme summer precipitation in northern Xinjiang
			 
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		 图4. 北疆夏季极端降水与春季热带关键区平均海温的时间变化  | 
	
Fig.4. Temporal variation of extreme summer precipitation in northern Xinjiang and sea surface temperature in key tropical regions in spring: the key region of the Indian Ocean (a); the key region of the eastern equatorial Pacific (b)  | 
	
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