The Climatic Change Trend and Seasonal Characteristics of Daily Temperature Extremes in China for the Latest 40 Years

Yang Ping; Liu Weidong; Wang Qig uang; Xiong Kaiguo; Hou Wei

Vol.21, NO.1, 2010

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2010 > 21(1): 29-36

Yang Ping, Liu Weidong, Wang Qig uang, et al. The climatic change trend and seasonal characteristics of daily temperature extremes in China for the latest 40 years. J Appl Meteor Sci, 2010, 21(1): 29-36.

Citation:

Yang Ping, Liu Weidong, Wang Qig uang, et al. The climatic change trend and seasonal characteristics of daily temperature extremes in China for the latest 40 years. J Appl Meteor Sci, 2010, 21(1): 29-36.

Citation:

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The Climatic Change Trend and Seasonal Characteristics of Daily Temperature Extremes in China for the Latest 40 Years

1.
Institute of Urban Meteorology of Beijing, China Meteorological Administration, Beijing 100089
2.
National Climate Center, Beijing 100081
3.
Lanzhou University, Lanzhou 730000

Received Date: 2009-06-08
Rev Recd Date: 2010-01-11
Publish Date: 2010-02-28

Abstract

Abstract

Extreme events have heavy negative effects on the society causing great economic loss so they have attracted much attention. Using maximal/minimum daily tempera ture data from 194 stations for the period of 1961—2000 of China and adopting indices of extreme climate, seasonal characteristics and the changes of daily tem perature extremes are analyzed. The indices of temperature extremes are introduc ed concluding absolute and relative definition. Then the annual indices of hot a nd cold extreme events are discussed. In order to compare the differences of the indices among different seasons, the season indices are also researched. The re sults indicate the hot extreme indices and cold extreme indices defined by absol ute threshold show the trend of summer and winter, but the result of absolute an nual indices of temperature extremes is not satisfying because the differences between southern and northern are not considered. Another indices based on the pe rcentage definitions indicate that cold and hot extremes indices are anisomerous. Hot days and cold days are not consistent and the indices in same area between hot days and cold days are not symmetrical. But indices for hot nights and cold nights show good consistency and symmetry. The indices change little for daytim e but change rapidly at night. The indices of seasonal temperature extremes show that the changes of indices in spring and autumn are most indistinctive, while the indices in winter is the most notable. The cold indices of spring, autumn an d winter are decreasing while trends of summer indices are increasing most of th e time.
- indices of temperature extremes;
- change trend;
- seasonal characteristics;
- warm ing

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References(16)

Figures and Tables

图 1 1961-2000年霜冻天指数 (a)、极端冷日指数 (b) 和极端冷夜指数 (c) 线性变化趋势 (标注黑色“ +”字的站点表示未通过α=0.05的显著性检验；空心图形代表b为负，实心图形代表b为正值)

Fig. 1 Trends per dacade in the annua lindex of frost days (a), cold days (b) and cold nights (c) during 1961-2000 (black cros ses show the stations which are not significant at the 0.05 level; the open one:b is negative; the solid one :b is positive)

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图 2 1961-2000年高温天指数 (a)、极端暖日指数 (b) 和极端暖夜指数 (c) 的线性变化趋势地理分布 (其他说明同图 1)

Fig. 2 Trends per dacade in the annual index of summer days (a), hot days (b) and hot nights (c) during 1961-2000 (others same as in Fig.1)

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图 3 1961—2000年春季极端冷指数变化趋势 (a) 冷日, (b) 冷夜 (其他说明同图 1)

Fig. 3 Trends per dacade in the spring seaso nal cold index during 1961— 2000 (a) cold day, (b) cold night (others same as in Fig.1)

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图 4 1961—2000年夏季极端暖指数变化趋势 (a) 暖日, (b) 暖夜 (其他说明同图 1)

Fig. 4 Trends per dacade in the summer seasonal hot index during 1961 — 2000(a) hot day, (b) hot night (others same as in Fig.1)

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图 5 1961— 2000年秋季极端冷指数变化趋势 (a) 冷日, (b) 冷夜 (其他说明同图 1)

Fig. 5 Trends per dacade in the autumn seasonal cold index during 1961 — 2000(a) cold day, (b) cold night (others same as in Fig.1)

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图 6 1961— 2000年冬季极端冷指数变化趋势 (a) 冷日, (b) 冷夜 (其他说明同图 1)

Fig. 6 Trends per dacade in the winter seasonal cold index during 1961 — 2000(a) cold day, (b) cold night (others same as in Fig.1)

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表 1 极端温度指数

Table 1 Indices of temperature extremes

表 2 1961-2000年通过显著性检验的站点数和全国平均的线性变化趋势

Table 2 The number of stations which are significant at the 5% level and the average trends per dacade of China during 1961-2000

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