主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2019, Vol. 35 ›› Issue (4): 93-99.doi: 10.3969/j.issn.1673-503X.2019.04.013

• ARTICLES • Previous Articles    

Change characteristics of shallow ground temperature and its prediction during the sowing period in Shenyang

SONG Xiao-wei1, LI Lin-lin2, LI Shi1, LIU Qing1, GAO Shu-xin3, JIANG Shan1, ZHANG Jing1, ZHANG Jing-xuan1   

  1. 1. Shenyang Meteorological Service, Shenyang 110168, China;
    2. Liaoning Institute of Meteorological Sciences, Shenyang 110166, China;
    3. Xinmin Meteorological Service, Xinmin 110300, China
  • Received:2017-12-18 Revised:2018-06-25 Published:2019-09-03
  • Supported by:
    This work is supported by Science and Technology Project of SGCC (No.521104170013).

Abstract: For understanding the change rule of ground temperature in Shenyang area,providing better forecast service on field temperature,reducing the risk of sowing and improving grain production safety,based on the data of air and ground temperature from the seven meteorological stations in Shenyang area from 1981 to 2015, the change rules of air and ground temperature in recent 35 years were analyzed using mathematical statistics methods and a ground temperature forecasting model for the spring sowing period (April and May) was established.The results show that from 1981 to 2010,the decadal temperature shows an increasing trend and the change of air temperature results in an obvious change of ground temperature.The climate tendency rates of air and ground temperature are between 0.426℃/10 a and 0.549℃/10 a.In the past 35 years,the differences of ground temperature at the soil depth of 0-5 cm,5-10 cm,and 10-20 cm are 1.5℃,0.5℃,and 0.5℃ during April and October,respectively.The ground temperature at the soil depth of 0-20 cm and air temperature undergo a climate abrupt change in 1996,affecting the changing trend of temperature.During the spring sowing period,the differences between air temperature and ground temperature at the soil depth of 0 cm,5 cm and 10 cm in the western region change respectively from the low value in April to the high value in May.The t-test of the ground temperature forecast model doesn't show significant difference at P=0.01 level,and the relative error is within ±10%,indicating that the model can be applied for the prediction of ground temperature during the spring sowing period (April and May) in Shenyang area.

Key words: Shenyang area, Ground temperature, Sowing period, Forecast

CLC Number: