Taklimakan Desert nocturnal low-level jet: climatology and dust activity
نویسندگان
چکیده
منابع مشابه
Climatology of nocturnal low-level jets over North Africa and implications for modeling mineral dust emission
[1] This study presents the first climatology for the dust emission amount associated with Nocturnal Low-Level Jets (NLLJs) in North Africa. These wind speed maxima near the top of the nocturnal boundary layer can generate near-surface peak winds due to shear-driven turbulence in the course of the night and the NLLJ breakdown during the following morning. The associated increase in the near-sur...
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Simulating the correct evolution of the nocturnal boundary layer (NBL), also often referred to as the stable boundary layer, is a challenge for any numerical model, since the NBL is influenced by a variety of sub-grid scale phenomena (Lenschow et al. 1988). These phenomena include propagating gravity waves, stationary waves that are fixed with respect to the terrain, Kelvin-Helmholtz waves, and...
متن کاملNocturnal Low-Level Jet over a Shallow Slope
A simple theory is presented for a nocturnal low-level jet (LLJ) over a planar slope. The theory extends the classical inviscid inertialoscillation model of LLJs to include upand downslope motion in the boundary layer within a stably stratified environment. The particular scenario considered is typical of LLJs over the Great Plains of the United States: southerly geostrophic wind over terrain t...
متن کاملThe age of the Taklimakan Desert.
The Taklimakan Desert is located in the foreland basin of the Tibetan Plateau. We report here the results of stratigraphic investigations of a 1626-meter-thick sequence with interbedded wind-blown silt from the southern marginal Taklimakan Desert. Because the studied section is located downwind of the desert, the eolian silt accumulation is closely linked to desert formation. Our new evidence i...
متن کاملA low-level jet in eastern Iran: a possible factor in dust events in the region
One of the world's major mineral dust source regions lies along the border between Iran and Afghanistan. In this studyit is hypothesized that a low-level jet may play in role in generating the intensity of this source region. The presence of alow-level jet east of the Seistan mountains is documented here for the first time. The jet exists mainly from May toSeptember and has a core at 850 mb. Ma...
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2016
ISSN: 1680-7324
DOI: 10.5194/acp-16-7773-2016