青藏高原季风对我国西北干旱区气候的影响

荀学义; 胡泽勇; 崔桂凤; 张和平; 胡英华; 杨保成

doi:10.3878/j.issn.1006-9585.2017.17024

青藏高原季风对我国西北干旱区气候的影响

doi: 10.3878/j.issn.1006-9585.2017.17024

荀学义^{1, 2, 3,},
胡泽勇^{1, 4},
崔桂凤⁵,
张和平³,
胡英华³,
杨保成⁶

1.
中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室, 兰州 730000
2.
内蒙古大学生态与环境学院, 呼和浩特 010021
3.
内蒙古自治区气象台, 呼和浩特 010051
4.
中国科学院青藏高原地球科学卓越创新中心, 北京 100101
5.
内蒙古呼和浩特市第十八中学, 呼和浩特 010022
6.
呼伦贝尔市气象局, 内蒙古自治区呼伦贝尔 021008

基金项目:

中国科学院战略性先导科技专项 XDA2006010101

国家自然科学基金项目 91537101

国家自然科学基金项目 41661144043

中国科学院寒旱区陆面过程与气候变化重点实验室开放基金项目 LPCC201306

详细信息

作者简介:
荀学义, 男, 1979年出生, 高工, 主要从事区域气候与陆面过程研究。E-mail:xunmengfei8@163.com

中图分类号: P462.4+1
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- 文章访问数: 1406
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-18
- 网络出版日期: 2017-12-23
- 刊出日期: 2018-05-20

The Effect of Tibetan Plateau Monsoon on the Climate in the Arid Area of Northwest China

Xueyi XUN^{1, 2, 3
,},
Zeyong HU^{1, 4},
Guifeng CUI⁵,
Heping ZHANG³,
Yinghua HU³,
Baocheng YANG⁶

1.
Key Laboratory for Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000
2.
School of Ecology and Environment, Inna Mongolia University, Hohhot 010021
3.
Inner Mongolia Autonomous Region Meteorological Observatory, Hohhot 010051
4.
Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101
5.
No.18 Middle School of Hohhot, Hohhot 010022
6.
Hulunbuir Meteorological Bureau, Hulunbuir, Inner Mongolia Autonomous Region 021008

Funds:

Strategic Priority Research Program of Chinese Academy of Sciences XDA2006010101

National Natural Science Foundation of China 91537101

National Natural Science Foundation of China 41661144043

Key Laboratory Program of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Acadmy Sciences LPCC201306

摘要

摘要: 基于ERA-Interim逐月再分析资料及同期高原和我国西北干旱区观测站温度与降水资料，分析高原季风与西北干旱区气候的关系，对比高原典型强弱季风年平均大尺度环流和水汽输送条件的差异，探讨高原强弱季风年西北干旱区气候差异形成的原因。研究结果表明：高原季风与我国西北干旱区气候相关关系显著；高原强弱季风年对应的大尺度环流和垂直环流系统存在明显差异；水汽条件和抬升条件好坏与降水量多寡配合得较好，即强高原季风年，高原北部边缘水汽条件和抬升条件更有利于降水，而弱高原季风年，高原北部边缘水汽条件和抬升条件偏差，对应降水量较常年同期偏少。
- 高原季风 /
- 西北干旱区 /
- 环流系统 /
- 水汽输送
Abstract: Based on monthly mean ERA-Interim reanalysis data and the temperature and precipitation data in the arid area of Northwest China during 1979-2013, differences in climate in the arid area of Northwest China between strong and weak monsoon years are analyzed. Correlation between the plateau monsoon and climate in the arid area of Northwest China is quantified. The mean large-scale circulation and water vapor transport are compared between strong and weak plateau monsoon years. The results show that the correlation between the plateau monsoon and climate in the arid area of Northwest China is significant. There are obvious differences in large scale circulation and vertical circulation system between the strong and weak monsoon years. The water vapor condition and uplifting condition are in good agreement with precipitation. The ability of water vapor uplifting along the northern flank of the Plateau is one of the important factors affecting climate in the arid area of Northwest China.
- Tibetan Plateau monsoon /
- Arid area of Northwest China /
- Circulation system /
- Water vapor transport

HTML全文

图 1 标准化动态高原季风指数（夏季指数）变化曲线

Figure 1. Interannual variation of normalized dynamic plateau monsoon index

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图 2 夏季指数与我国西北干旱区（a）温度和（b）降水量相关系数空间分布

Figure 2. Correlation coefficients of the normalized plateau monsoon index with (a) temperature and (b) precipitation in the arid area of Northwest China

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图 3 （a, b）100 hPa和（c, d）500 hPa平均高度场（实线，单位：dagpm）与距平场（阴影区）：（a、c）强高原季风年；（b、d）弱高原季风年

Figure 3. Average geopotential height (solid lines, units: dagpm) and its anomalies (coloured) at (a, b) 100 hPa and (c, d) 500 hPa: (a, c) Strong plateau monsoon years; (b, d) weak plateau monsoon years

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图 4 （a、b）100~500 hPa和（c、d）600~850 hPa平均风距平流线图：（a、c）强高原季风年；（b、d）弱高原季风年

Figure 4. Wind anomalies streamlines averaged between (a, b) 100-500 hPa and (c, d) 600-850 hPa: (a, c) Strong plateau monsoon years; (b, d) weak plateau monsoon years

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图 5 沿（a、b）80°E和（c、d）90°E经圈平均环流剖面：（a、c）强高原季风年；（b、d）弱高原季风年

Figure 5. Vertical profiles of average circulation along (a, b) 80°E and (c, d) 90°E: (a, c) Strong plateau monsoon years; (b, d) weak plateau monsoon years

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图 6 强高原季风年与弱高原季风年（a）500 hPa、（b）600 hPa、（c）700 hPa和（d）850 hPa平均比湿差值场（单位：10^-3 g/kg）

Figure 6. Differences in average specific humidity at (a) 500 hPa, (b) 600 hPa, (c) 700 hPa, and (d) 850 hPa between strong and weak plateau monsoon years (units: 10^-3 kg/kg)

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图 7 强高原季风年和弱高原季风年（a）地面至600 hPa和（b）600 hPa以上垂直积分的水汽通量散度差值场（填色，单位：g s^-1 cm^-1 hPa^-1）；流线表示水汽通量差值场

Figure 7. Differences in the water vapor flux divergence (color filling, units: g s^-1 cm^-1 hPa^-1) vertically integrated from (a) the surface to 600 hPa and (b) from 600 hPa upward between strong and weak plateau monsoon years; the streamlines stand for differences in the water vapor fluxes

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图 8 强高原季风年与弱高原季风年（a）500 hPa、（b）600 hPa、（c）700 hPa和（d）850 hPa平均散度差值场

Figure 8. Differences in the divergence at (a) 500 hPa, (b) 600 hPa, (c) 700 hPa, and (d) 850 hPa between strong and weak plateau monsoon years

下载: 全尺寸图片幻灯片

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