STUDY ON DECADE CHANGE OF CLIMATE SHIFT FROMWARM-DRY PERIOD TO WARM-WET PERIOD OVER TIBETAN PLATEAU

Niu Tao; Liu Hongli; Song Yan; Chen Long xun

Vol.16, NO.6, 2005

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(6): 763-771

Niu Tao, Liu Hongli, Song Yan, et al. Study on decade change of climate shift from warm-dry period to warm-wet period over Tibetan Plateau. J Appl Meteor Sci, 2005, 16(6): 763-771.

Citation:

Niu Tao, Liu Hongli, Song Yan, et al. Study on decade change of climate shift from warm-dry period to warm-wet period over Tibetan Plateau. J Appl Meteor Sci, 2005, 16(6): 763-771.

Niu Tao, Liu Hongli, Song Yan, et al. Study on decade change of climate shift from warm-dry period to warm-wet period over Tibetan Plateau. J Appl Meteor Sci, 2005, 16(6): 763-771.

Citation:

Niu Tao, Liu Hongli, Song Yan, et al. Study on decade change of climate shift from warm-dry period to warm-wet period over Tibetan Plateau. J Appl Meteor Sci, 2005, 16(6): 763-771.

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STUDY ON DECADE CHANGE OF CLIMATE SHIFT FROMWARM-DRY PERIOD TO WARM-WET PERIOD OVER TIBETAN PLATEAU

1.
Key Laboratory for Atmospheric Chemistry, Center for Atmosphere Watch andServices, Chinese Academy of Meteorological Sciences, CMA, Beijing 100081
2.
Chinese Academy of Meteorological Sciences, Beijing 100081
3.
CMA Trainning Center, Beijing 100081

Received Date: 2004-11-06
Rev Recd Date: 2005-08-24
Publish Date: 2005-12-31

Abstract

Abstract

In terms of the yearly average data obtained from 123 routine meteorological observatories located over Tibetan Plateau, the decade characteristics of climate change over the Plateau in the recent 40 years are studied. It is found that in the mid-late 1980s, an evident climatic sudden change happens to yearly average temperature rainfall and relative humidity, featured by the increasing of them. The climate of the Plateau shifts to warm-wet period from warm-dry period at the sudden turning point. The climatic sudden change of temperature and rainfall are earlier than that of relative humidity over the target region. Over the Plateau, the increases in temperature and humidity occur mainly in winter and these increases, also occurring in spring, show slow range; increase of temperature and somewhat lowered humidity happen in summer; autumn is a season for remarkable increase of temperature but humidity shows no tendency of its change。
- Tibetan;
- Plateau;
- Climate characteristics;
- Warm-wet period

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References(13)

Figures and Tables

图 1 青藏高原123 个观测台站位置分布图

虚线为地形等高线，单位:m ；圆圈为台站位置

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图 2 1961-1998 年青藏高原各气象要素线性倾向分布

(a)年平均温度(单位:℃/a),(b)年平均相对湿度(单位:%/ a), (c)年总降水量(单位:mm/ a),(d)11 月至次年3 月累积积雪日数(单位:d/ a)

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图 3 1961-1998 年青藏高原全区年平均温度序列及突变检验

(a)年平均温度(直线为线性拟合线，虚线为突变前后时期的平均值)(b)突变检验(MK 检验)(两条虚线为95 %临界值线，临界值 U|_0.05 =1.96)

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图 4 1961-1998 年不同季节青藏高原全区平均温度序列

(a)春季，(b)夏季，(c)秋季，(d)冬季

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图 5 1961-1998 年青藏高原全区平均降水量时间序列

(a)年总降水量(直线为线性拟合线，断线为5 年滑动平均值)(b)年总降水量的突变检验(MK 检验)(两条虚直线为95 %临界值线，临界值 |U| 0.05 =1.96)(c)冬季总降水量，(d)春季总降水量

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图 6 1961-1998 年青藏高原全区平均相对湿度序列

(a)年平均相对湿度(断线为拟合线，虚线为突变前后时期的平均值)(b)突变检验(滑动t 检验)(两条虚线为95 %临界值线，临界值 |t| 0.05 =2.31)，(c)冬季平均相对湿度，(d)春季平均相对湿度

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表 1 青藏高原年平均温度、降水量、湿度在不同地区、不同年代的平均值

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