Integration of Chemical Transport Model and Field Observations based on the Four Dimensional Variational Method

基于四维变分法的化学输运模型与现场观测的集成

• 批准号: 17360259
• 负责人: UNO Itsushi
• 金额: $ 10.64万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360259/
• 关键词: yellow sand; dust model; data assimilation; Lidar; ライグー; 物質輸送

A four-dimensional variational (4D-Var) data assimilation system for a regional chemical transport model was developed and then applied to a heavy dust event which occurred between 30 March to 4 April 2007 over eastern Asia. The vertical profiles of the dust extinction coefficients derived from 5 NIES LIDAR observation sites are directly assimilated. The modeled dust extinction coefficients are improved considerably after assimilation. Assimilation results increase dust emissions over the Gobi Desert and Mongolia considerably; especially between 29 and 30 March. The heavy dust event is caused by the heavy dust uplift flux over the Gobi Desert and Mongolia during those days. We obtain the total optimized dust emissions of 57.9 Tg (57.8% larger than before assimilation). We also confirmed that the assimilated model results agreed with OMI aerosol index and WMO SYNOP report, and Lidar-4DVAR system has a potential to improve the accuracy of Asian dust emission/transport model.

发展了一个区域化学输送模式的四维变分同化系统，并将其应用于2007年3月30日至4月4日发生在东亚地区的一次强沙尘天气过程。利用5个NIES LIDAR观测站的沙尘消光系数垂直廓线直接进行同化。同化后，模式化的沙尘消光系数有了很大的改善。同化的结果增加了戈壁沙漠和蒙古的沙尘排放量显着，特别是3月29日和30日之间。此次沙尘暴事件是由戈壁沙漠和蒙古上空强沙尘抬升通量引起的。我们得到的总优化粉尘排放量为57.9 Tg（比同化前大57.8%）。模拟结果与OMI气溶胶指数和WMO SYNOP报告一致，说明Lidar-4DVAR系统具有提高亚洲沙尘排放/输送模式精度的潜力。

项目成果

Asian dust outflow in the PBL and free atmosphere retrieved by NASA CALIPSO and an assimilated dust transport model

• DOI: 10.5194/acp-9-1227-2009
• 发表时间: 2008-05
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: Y. Hara;K. Yumimoto;I. Uno;A. Shimizu;N. Sugimoto;Zhaoyan Liu;D. Winker

Numerical Modeling of Asian Dust Emission and Transport by Adjoint Inversion using Lidar Observation Network

利用激光雷达观测网络伴随反演对亚洲沙尘排放和输送进行数值模拟

• 发表时间: 2007
• 期刊: Atmos.Chem.Phys.Discuss 7
• 作者: Yumimoto;K.;et. al.
• 通讯作者: et. al.

Adjoint inverse modeling of dust emission and transport over East Asia

• DOI: 10.1029/2006gl028551
• 发表时间: 2007-04
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: K. Yumimoto;I. Uno;N. Sugimoto;A. Shimizu;Shinsuke Satake

随伴モデリングを用いた東アジア域のダストの発生・輸送の逆推定

使用伴随模型逆估计东亚粉尘产生和输送

• 发表时间: 2008
• 期刊: 大気環境学会誌 (印刷中)
• 作者: 鵜野 伊津志;ほか
• 通讯作者: ほか

Adjoint Inverse modeling dust enission and transport over East Asia

东亚沙尘产生和输送的伴随逆模拟

• 发表时间: 2007
• 作者: Yumimoto;K.;et. al.
• 通讯作者: et. al.