Regional Characteristics of Recent Dust Occurrence and Its Controlling Factors in East Asia
Regional Characteristics of Recent Dust Occurrence and Its Controlling Factors in East Asia
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DOI：
10.2151/sola.2016-038
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发表时间：
2016
期刊：
影响因子：
1.9
通讯作者：
Jing Wu;Y. Kurosaki;M. Shinoda;K. Kai
中科院分区：
文献类型：
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作者：
Jing Wu;Y. Kurosaki;M. Shinoda;K. Kai
风蚀产生的风沙主要受两个因素控制：风蚀力（即风速）和风蚀性（即地表条件）。侵蚀性因素包括许多以复杂方式相互作用的地表参数。到目前为止，每个因素对沙尘爆发的影响程度仍不清楚，沙尘爆发因地区和季节而异。因此，我们通过量化1999年至2013年期间侵蚀力和各种侵蚀性参数对逐站沙尘变化的相对贡献，绘制了东亚旱地沙尘爆发的控制因素图。侵蚀力控制了塔克拉玛干沙漠、河西走廊以西和阿尔泰山北侧的沙尘爆发。另一方面，沙尘暴发取决于草原地区的侵蚀性：去年夏季降水量减少或植被较少与蒙古草原春季沙尘暴有关，而春季植被较少和积雪减少则加剧了内蒙古草原的沙尘爆发。人们发现，荒漠化地区人为恢复的植被可能会抑制黄土高原的沙尘爆发。 （引文：Wu, J., Y. Kurosaki, M. Shinoda, and K. Kai, 2016: 东亚近期沙尘发生的区域特征及其控制因素. SOLA, 12, 187−191, doi:10.2151/sola. 2016-038.）
Aeolian dust, resulting from wind erosion, is controlled by two major factors: aeolian erosivity (i.e., wind speed) and aeolian erodibility (i.e., land surface conditions). Erodibility factors include a number of land surface parameters that interact in complicated manners. Thus far, the extent to which each of the factors contributes to dust outbreaks, which vary regionally and seasonally, remains unclear. As such, we present a novel map of the controlling factors for dust outbreaks in dryland of East Asia by quantifying the relative contributions of the erosivity and various erodibility parameters to inter-annual dust variations on a station basis during the period of 1999 to 2013. Erosivity controls dust outbreaks in the Taklimakan Desert, west of the Hexi Corridor, and on the north side of the Altai Mountain. On the other hand, dust outbreaks are dependent on erodibility in steppe regions: lower precipitation or less abundant vegetation during the previous summer was found to be related to dusty springs in the Mongolian steppe, whereas the less abundant spring vegetation and reduced snow cover enhanced dust outbreaks in the Inner Mongolian steppe. Anthropogenically restored vegetation in desertified areas was found to be likely to suppress dust outbreaks in the Loess Plateau. (Citation: Wu, J., Y. Kurosaki, M. Shinoda, and K. Kai, 2016: Regional characteristics of recent dust occurrence and its controlling factors in East Asia. SOLA, 12, 187−191, doi:10.2151/sola. 2016-038.)