Influence of Dust Storm Frequency in Northern China on Fluctuations of Asian Dust Frequency Observed in Japan
Influence of Dust Storm Frequency in Northern China on Fluctuations of Asian Dust Frequency Observed in Japan
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DOI：
10.2151/sola.2007-031
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发表时间：
2007
期刊：
影响因子：
1.9
通讯作者：
S. Tian;M. Inoue;Mingyuan Du
中科院分区：
文献类型：
--
作者：
S. Tian;M. Inoue;Mingyuan Du
利用最新的长期观测数据研究了日本观测到的亚洲沙尘频率（ADF）与中国北方沙尘暴频率（DSF）之间的关系。还探讨了与 ADF 变化相关的可能气候条件。研究发现，自 20 世纪 70 年代中期以来，内蒙古及其附近地区的 DSF（IMV）和 ADF 几乎彼此平行。 IMV 和 ADF 中的 DSF 显着正相关，表明 IMV 对 ADF 的影响比中国北方其他尘源地区更强。极端 ADF 年的海平面气压和 700 hPa 风场合成图呈现出中国东北至日本北部地区气旋异常和高 ADF 年戈壁沙漠周围反气旋异常的空间格局。这种情况与东北地区气旋活动增强、内蒙古自治区冷空气爆发加剧相对应，有利于内蒙古自治区沙尘暴的形成。
Relationship between Asian dust frequency observed in Japan (ADF) and dust storm frequency (DSF) in northern China was examined with up-to-date long-term observational data. Possible climatic conditions associated with variations of ADF were also explored. It was found that DSF at stations in Inner Mongolia and its vicinity (IMV) and ADF behaved nearly parallel to each other from the mid 1970s. Significant positive correlation between DSF in IMV and ADF suggests that IMV has a stronger influence on ADF than other dust source regions in northern China. Composite maps of Sea Level Pressure and 700 hPa wind fields for extreme ADF years exhibited a spatial pattern with cyclonic anomalies over the area from Northeast China to north Japan and anticyclonic anomalies around the Gobi desert in high ADF years. This situation corresponds to enhanced cyclonic activities in Northeast China and intensified cold air outbreaks in IMV, which are favorable for formation of dust storms in IMV.