A Numerical Simulation of the Influences of Local Circulation over Complex Terrain on Gas Dispersion on the Tibetan Plateau

被引：0

作者：

Du, Mingyuan ^{[1
]}

Yonemura, Seiichiro ^{[1
]}

Yamada, Tetsuji ^{[2
]}

Zhang, Xianzou ^{[3
]}

Li, Yingnian ^{[4
]}

Gu, Song ^{[4
]}

Zha, Liang ^{[4
]}

Tang, Yanhong ^{[5
]}

机构：

[1] Natl Inst Agroenvironm Sci, Dept Agrometeorol, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan

[2] Yamada Sci & Art Corp, Santa Fe, NM 87506 USA

[3] Chinese Acad Sci, Inst Geograph Sci & Natl Resource Res, Beijing 100101, Peoples R China

[4] Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Peoples R China

[5] Natl Inst Environm Studies, Global Environm Res Grp, Tsukuba, Ibaraki 3058606, Japan

来源：

RECENT ADVANCES IN FLUID MECHANICS | 2009年

关键词：

Gas dispersion; Complex Terrain; Temperature inversion; Local Circulation; Tibetan Plateau; TURBULENCE CLOSURE-MODEL; ALPINE MEADOW; DRAINAGE FLOWS; EXCHANGE;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Due to strong radiation cooling and cold air run-off from a higher mountain region into the valley or basin by a local circulation in nighttime, there is a temperature inversion layer exited almost every day during wintertime over the complex terrain on the Tibetan Plateau. Based on some meteorological observations, the YSA's (Yamada Science and Art) A2C atmospheric modeling system (NEW HOTMAC/RAPTAD model) is used for illustrate this local circulation and influences of this circulation on gas dispersion are simulated. Gas accumulation and dispersion processes in the volley or basin were simulated. Gas accumulation process occurred near the ground surface by cold air drainage and the accumulated higher concentration layer grown up to higher level gradually during the night and disappeared by up slope wind and turbulences gradually after sunrise. The higher gas concentration layer shifted downward while disappearing. This result provides some important insights into future CO2 flux observation and analysis over complex terrain.

引用

页码：58 / +

页数：2

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