Acta Geographica Sinica ›› 2010, Vol. 65 ›› Issue (5): 525-532.doi: 10.11821/xb201005002

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The Climatic Variability and Influence of First Frost Dates in Northern China

HAN Rong-qing; LI Wei-jing; AI Wan-xiu; SONG Yan-ling; YE Dian-xiu; HOU Wei   

  1. National Climate Center; Beijing 100081; China
  • Received:2010-01-08 Revised:2010-02-10 Online:2010-05-25 Published:2010-05-25
  • Supported by:

    National Non-profit Research Project to Serve the Public Interest, No.GYHY200906019; The Projects of the Ministry of Science and Technology of China, No.2008BAK50B02; No.2007BAC29B04


At present, there is no uniform standard of forecasting system and serving products for first-frost date forecasting studies and operations in China\'s meteorological departments in spite of agricultural autumn harvests depending greatly on the first frost occurring earlier or later in northern China, which restrained the development of prediction studies and operations on the first-frost dates. Therefore the study aims at the above problems and analyzes 3 aspects of them. The first is about the discrepancy analyses of the three kinds of first frost date data, in which two of them are defined by surface ground temperature and air temperature from instrument shelter, respectively, and the other data are from observing first frost dates. And then the study enlarges the number of the representative stations in northern China (north of 30oN) of National Climate Center operation from 65 in the past to 233 at present for improving the spatial resolving power of the prediction products. The second is the analyses of the climate features of the first frost dates based on the aforementioned surface ground temperature data of the 233 stations from 1961 to 2008. Finally, the study shows that it is outstanding for the significant effects of the climatic variability of the first frost dates on single outputs of rice and maize separately in Heilongjiang Province, as long as without the continuing and lasting cold days before the autumn, whereas the effects from anomalous air temperature before the autumn, for example from cool summer, are dominant.

Key words: first frost date, surface ground temperature, representative stations, climatic features, output influence, northern China

CLC Number: 

  • S425