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

Kimura, Reiji; Bai, Long; Wang, Jiemin

doi:10.1016/j.catena.2009.02.016

Cited by 57 publications

(41 citation statements)

References 20 publications

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“…Nonetheless, in this area the vegetation cover (0.2, see Fig. 9) is still too important to allow local dust production (Kimura et al, 2009). Indeed, the maximum value of the CN Dp>0.5µm concentrations measured at the super-site of Djougou during the period of interest is about 3 cm −3 on 14 June.…”

Section: Observations Of Sedimentation and Entrainment Processesmentioning

confidence: 92%

Transport of dust particles from the Bodélé region to the monsoon layer – AMMA case study of the 9–14 June 2006 period

et al. 2011

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Abstract. Aerosol properties were measured during an airborne campaign experiment that took place in June 2006 in West Africa within the framework of the African Monsoon Multidisciplinary Analyses (AMMA). The goal of the present study was to investigate a dynamical mechanism able to facilitate the sedimentation of dust particles from the Saharan Air Layer (SAL) into the boundary layer. A significant change in the dust particle concentration measured along the meridian between Niamey (Niger) and Cotonou (Benin) was found in the boundary layer (∼700 m), where the dust particle concentration increased in a zone where local emission is not possible. Moreover, the boundary layer top observed with the dropsondes launched with the F-F20 shows a strong relationship with the surface cover anomalies, with higher Boundary Layer (BL) tops over the warmer surfaces, such as croplands, as opposed to adjacent forest. A mesoscale atmospheric model with a new on-line dust parameterization, resulting from the Alfaro and Gomes (2001) parametrisation and AMMA observations, was used to interpret the impact of vegetation anomalies on dust particle sedimentation. The results of the simulation are consistent with the observations, with higher dust concentration over the warm surface cover anomalies.

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Section: Observations Of Sedimentation and Entrainment Processesmentioning

confidence: 92%

Transport of dust particles from the Bodélé region to the monsoon layer – AMMA case study of the 9–14 June 2006 period

et al. 2011

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“…This index is the same as the dust outbreak ratio in Kimura et al (2009), which is also the ratio of dust outbreak frequency to strong wind frequency, but the difference is that they employed 7.0 m s…”

Section: Normalized Dust Outbreak Frequency (Nf Do )mentioning

confidence: 99%

Effects of Soil and Land Surface Conditions in Summer on Dust Outbreaks in the Following Spring in a Mongolian Grassland

Kurosaki

Shinoda

Mikami³

et al. 2011

SOLA

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“…The value for this parameter is poorly constrained by observations. Where observations are available they may be limited to a particular region (Kimura et al, 2009). Often the vegetation threshold is chosen subjectively to give reasonable estimates of dust source regions.…”

Section: Tuning Threshold Limits For Surface Emissionsmentioning

confidence: 99%

A new dust cycle model with dynamic vegetation: LPJ-dust version 1.0

Shannon

Lunt

2011

Geosci. Model Dev.

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Abstract. This paper presents a new offline dust cycle model which uses the Lund-Potsdam-Jena dynamic global vegetation model (Sitch et al., 2003) to calculate time varying dust sources. Surface emissions are calculated by simulating the processes of saltation and sandblasting using an existing model . Dust particles are transported using the TOMCAT chemical transport model (Chipperfield, 2006). Dust particles are removed from the atmosphere by dry deposition and sub-cloud scavenging. The model is designed so that it can be driven using reanalysis data or GCM derived fields.To improve the performance of the model, threshold values for vegetation cover, soil moisture, snow depth and threshold friction velocity, used to determine surface emissions are tuned. The effectiveness of three sub-cloud scavenging schemes are also tested. An ensemble of tuning experiments are evaluated against dust deposition and surface concentration measurements. Surface emissions which produce the best agreement with observations range from 1600 to 2400 Mtyr −1 .

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

Cited by 57 publications

References 20 publications

Transport of dust particles from the Bodélé region to the monsoon layer – AMMA case study of the 9–14 June 2006 period

Transport of dust particles from the Bodélé region to the monsoon layer – AMMA case study of the 9–14 June 2006 period

Effects of Soil and Land Surface Conditions in Summer on Dust Outbreaks in the Following Spring in a Mongolian Grassland

A new dust cycle model with dynamic vegetation: LPJ-dust version 1.0

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