scholarly journals Detection of stratospheric intrusion events and their role in ozone enhancement at a mountain background site in sub-tropical East Asia

2021 ◽  
pp. 118779
Author(s):  
Chang-Feng Ou-Yang ◽  
Saginela Ravindra Babu ◽  
Jia-Ren Lee ◽  
Ming-Cheng Yen ◽  
Stephen M. Griffith ◽  
...  
Keyword(s):  
East Asia ◽  
Background Site ◽  
Stratospheric Intrusion

A deep stratospheric intrusion associated with an intense cut-off low event over East Asia

2014 ◽  
Vol 58 (1) ◽  
pp. 116-128 ◽  
Author(s):  
Dan Li ◽  
JianChun Bian ◽  
QiuJun Fan
Keyword(s):  
East Asia ◽  
Stratospheric Intrusion

scholarly journals Modeling Trans-Pacific Transport and Stratospheric Intrusion of Tropospheric Ozone using Hemispheric CMAQ during April 2010: Part 2. Examination of Emission Impacts based on the Higher-order Decoupled Direct Method

2019 ◽  
Author(s):  
Syuichi Itahashi ◽  
Rohit Mathur ◽  
Christian Hogrefe ◽  
Sergey L. Napelenok ◽  
Yang Zhang
Keyword(s):  
East Asia ◽  
Tropospheric Ozone ◽  
Direct Method ◽  
Higher Order ◽  
Positive Correlation ◽  
Mixing Ratios ◽  
Stratospheric Intrusion ◽  
Previous Part ◽  
The Impact ◽  
Surface O3

Abstract. The state-of-the-science Community Multiscale Air Quality (CMAQ) Modeling System which has recently been extended for hemispheric-scale modeling applications (referred to as H-CMAQ), is applied to study the trans-Pacific transport, a phenomenon recognized as a potential source of air pollution in the U.S.A., during April 2010. The results of this analysis are presented in two parts. In the previous part 1 paper, model evaluation for tropospheric ozone (O3) was presented and an air mass characterization method was developed. Results from applying this newly established method pointed to the importance of emissions as the factor to enhance surface O3 mixing ratio over the U.S.A. In this subsequent part 2 paper, emission impacts are examined based on mathematically rigorous sensitivity analysis using the higher-order decoupled direct method (HDDM) implemented in H-CMAQ. The HDDM sensitivity coefficients indicate the presence of a NOx-sensitive regime during April 2010 over most of the northern hemisphere. By defining emission source regions over the U.S.A. and East Asia, impacts from these emission sources are examined. At the surface during April 2010, the emission impacts of the U.S.A. and East Asia are comparable over the western U.S.A. with a magnitude of about 3 ppbv impacts on a monthly mean of all hours basis whereas the impact of domestic emissions dominates over the eastern U.S.A. with a magnitude of about 10 ppbv impacts on a monthly mean basis. The positive correlation (r = 0.63) between surface O3 mixing ratios and domestic emission impacts is confirmed. In contrast, the relationship between surface O3 mixing ratios and emission impacts from East Asia exhibits a flat slope when considering the entire U.S.A. However, this relationship has strong regional differences between the western and eastern U.S.A.; the western region exhibits a positive correlation (r = 0.36–0.38) whereas the latter exhibits a flat slope (r 

Dynamic variations of ultrafine, fine and coarse particles at the Lu-Lin background site in East Asia

2013 ◽  
Vol 78 ◽  
pp. 154-162 ◽  
Author(s):  
Sheng-Chieh Chen ◽  
Shih-Chieh Hsu ◽  
Chuen-Jinn Tsai ◽  
Charles C.-K. Chou ◽  
Neng-Huei Lin ◽  
...  
Keyword(s):  
East Asia ◽  
Coarse Particles ◽  
Background Site ◽  
Dynamic Variations

Gaseous and particulate polycyclic aromatic hydrocarbons at the Gosan background site in East Asia

2012 ◽  
Vol 49 ◽  
pp. 311-319 ◽  
Author(s):  
J.Y. Kim ◽  
J.Y. Lee ◽  
S.-D. Choi ◽  
Y.P. Kim ◽  
Y.S. Ghim
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East Asia ◽  
Aromatic Hydrocarbons ◽  
Background Site ◽  
Polycyclic Aromatic

scholarly journals Enhanced concentrations of citric acid in spring aerosols collected at the Gosan background site in East Asia

2011 ◽  
Vol 45 (30) ◽  
pp. 5266-5272 ◽  
Author(s):  
Jinsang Jung ◽  
Kimitaka Kawamura
Keyword(s):  
Citric Acid ◽  
East Asia ◽  
Background Site

East Asia in the World

2020 ◽  
Keyword(s):  
East Asia ◽  
The World

Stateness and Democracy in East Asia

2020 ◽  
Keyword(s):  
East Asia

A History of East Asia

2017 ◽  
Author(s):  
Charles Holcombe
Keyword(s):  
East Asia ◽  
History Of
Sign in / Sign up

Export Citation Format

Share Document