scholarly journals TEMPORAL AND SPATIAL VARIATION CHARACTERISTICS OF BRAIDED STREAMS

2002 ◽  
Vol 46 ◽  
pp. 737-742
Author(s):  
Hiroshi TAKEBAYASHI ◽  
Shinji EGASHIRA ◽  
Takeshi OKABE
Keyword(s):  
Spatial Variation ◽  
Temporal And Spatial Variation ◽  
Braided Streams ◽  
Variation Characteristics ◽  
Temporal And Spatial

scholarly journals Temporal and spatial variation characteristics of temperature and its impact on grain production in Northeast China in recent 50 years

2021 ◽  
Author(s):  
Weiping Yan ◽  
Hongxiang Zhao ◽  
Lihua Zhang ◽  
Chen Xu ◽  
Guobo Tan ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Northeast China ◽  
Regional Differences ◽  
Warming Trend ◽  
Grain Production ◽  
Temporal And Spatial Variation ◽  
Average Wind Speed ◽  
Variation Characteristics ◽  
Temporal And Spatial ◽  
The Impact

Abstract Climate warming has a great impact on grain production in northeast China, but there are few studies on the temporal and spatial variation characteristics of annual Tmean (mean temperature), the impact of meteorological factors on Tmean, and the impact of Tmean increase on grain production in northeast China. This study found that annual Tmean decreased from southeast to northwest in Northeast China, and there were regional differences in spatial distribution. The annual Tmean isoline in Northeast China moves obviously from southeast to northwest. The annual warming trend of Tmean was significant from 1971 to 2000, and moderated from 2001 to 2020. In recent 50 years, Tmean had obvious periodic changes. In the mid-late 1980s, annual Tmean had a sudden warming change, and since then it has been rising continuously. Sunshine hours, average wind speed, evaporation and average air pressure had a very significant correlation with Tmean. In conclusion, the climate change in northeast China in the past 50 years has an obvious warming and drying trend, and there are regional differences in the warming and drying. The warming and drying climate has brought challenges to agricultural production and food security in Northeast China. However, the negative effects of grain production reduction caused by warming and drying climate can be avoided to a certain extent if we deal with it properly.

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