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Trend Analysis of Temperature and Precipitation Extremes during Winter Wheat Growth Period in the Major Winter Wheat Planting Area of China

1
Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
2
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
3
School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 45045, China
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(5), 240; https://doi.org/10.3390/atmos10050240
Received: 28 March 2019 / Revised: 24 April 2019 / Accepted: 27 April 2019 / Published: 1 May 2019
(This article belongs to the Special Issue Weather and Climate Extremes: Current Developments)
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Abstract

In this study, the major winter wheat planting area of China is selected as the study area, with the time scale of the growth period of winter wheat (a total of 56 growth periods during October 1961 to May 2016). The significance, stability, magnitude of the trend and the average trend of the study area with eight temperature indices and seven precipitation indices of 453 meteorological stations are tested by Mann–Kendall method and Sen’s nonparametric method. The following observation can be made: (1) the cold extreme indices show strong and stable downward trend in most of the stations in the study area, while the hot extreme indices show a strong and stable upward trend, especially in the northern winter wheat planting area and the north of the southern winter wheat planting area. (2) The trends of extreme precipitation indices in most of the sites in the study area are insignificant and unstable. Only in R20mm, a significant and stable decreasing trend is shown in some stations, which is mainly located in the northern winter wheat planting area and part of the central and western regions in the study area. The results in some ways could enrich the references for understanding the climate change in the growth period of winter wheat in the region and help to formulate a better agronomic management practice of winter wheat. View Full-Text
Keywords: climate extremes; Mann–Kendall method; Sen’s nonparametric method; growth period; winter wheat climate extremes; Mann–Kendall method; Sen’s nonparametric method; growth period; winter wheat
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Nie, H.; Qin, T.; Yang, H.; Chen, J.; He, S.; Lv, Z.; Shen, Z. Trend Analysis of Temperature and Precipitation Extremes during Winter Wheat Growth Period in the Major Winter Wheat Planting Area of China. Atmosphere 2019, 10, 240.

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