Relationships among dust outbreaks, vegetation cover, and surface soil water content on the Loess Plateau of China, 1999-2000

被引：59

作者：

Kimura, Reiji ^{[1
]}

Bai, Long ^{[2
]}

Wang, Jiemin ^{[3
]}

机构：

[1] Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan

[2] Shenyang Agr Univ, Shenyang 110161, Liaoning, Peoples R China

[3] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China

来源：

CATENA | 2009年 / 77卷 / 03期

关键词：

Asian dust; Dust outbreak frequency; Meteorological data; Three-layer soil model; Vegetation cover; EAST-ASIA; WIND; EVENTS; TRANSPORT; EMISSION; BALANCES; MONGOLIA; STORMS; HEAT;

D O I：

10.1016/j.catena.2009.02.016

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We analyzed relationships among dust outbreaks, Normalized Difference Vegetation Indices (NDVI), and surface soil water content (0 to 2 cm depth) on the Loess Plateau, a significant dust source area of East Asia. World Surface Data for wind speed and current weather, coarse-resolution data for NDVI, and a three-layer soil model for surface soil water content were used. The threshold NDVI for preventing dust outbreaks was about 0.2 when the wind speed ranged from 7 to 8 in s(-1). This threshold NDVI corresponds to a vegetation cover of 18%. The threshold ratio of surface soil water content to the field capacity (theta(r)) was about 0.2. Conditions facilitating dust outbreaks on the Loess Plateau are when NDVI is less than 0.2 with wind speed >= 7 m s(-1) and theta(r)<0.2, and when NDVI is greater than 0.2 with wind speed >= 9 m s(-1) and theta(r)<0.2. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：292 / 296

页数：5

共 28 条

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