Abstract
The dominant factors controlling the seasonal variations of ozone (O3) and three major oxidized nitrogen species, peroxyacetyl nitrate (PAN), nitrogen oxides (NOx), and nitric acid (HNO3), in northeast Asia are investigated by using a three-dimensional global chemical transport model to analyze surface observations made at Rishiri Island, a remote island in northern Japan. The model was evaluated by comparing with observed seasonal variations, and with the relationships between O3, CO, and PAN. We show that the model reproduces the chemical environment at Rishiri Island reasonably well, and that the seasonal cycles of O3, CO, NOy species, and VOCs are well predicted. The impact of local emissions on some of these constituents is significant, but is not the dominant factor affecting the seasonal cycles. The seasonal roles of chemistry and transport in controlling O3 and PAN are revealed by examining production/destruction and import/ export/deposition fluxes in the boundary layer over the Rishiri region. For O3, transport plays a key role throughout the year, and the regional photochemical contribution is at most 10% in summer. For PAN, in contrast, transport dominates in winter, while in-situ chemistry contributes as much as 75% in summer. It is suggested that the relative contribution of transport and in-situ chemistry is significantly different for O3 and PAN, but that the wintertime dominance of transport due to the long chemical lifetimes of these species is sufficient to drive the seasonal cycles of springtime maximum and summertime minimum characteristic of remote sites.
| Original language | English |
|---|---|
| Article number | 4706 |
| Journal | Journal of Geophysical Research: Atmospheres |
| Volume | 107 |
| Issue number | D23 |
| DOIs | |
| Publication status | Published - 2002 Dec 16 |
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Keywords
- Oxidized nitrogen
- Photochemistry
- Seasonal cycle
- Transport
- Tropospheric ozone
ASJC Scopus subject areas
- Atmospheric Science
- Geophysics
- Earth and Planetary Sciences (miscellaneous)
- Space and Planetary Science
Cite this
Seasonal cycles of ozone and oxidized nitrogen species in northeast Asia 2. A model analysis of the roles of chemistry and transport. / Tanimoto, Hiroshi; Wild, Oliver; Kato, Shungo; Furutani, Hiroshi; Makide, Yoshihiro; Komazaki, Yuichi; Hashimoto, Shigeru; Tanaka, Shigeru; Akimoto, Hajime.
In: Journal of Geophysical Research: Atmospheres, Vol. 107, No. D23, 4706, 16.12.2002.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Seasonal cycles of ozone and oxidized nitrogen species in northeast Asia 2. A model analysis of the roles of chemistry and transport
AU - Tanimoto, Hiroshi
AU - Wild, Oliver
AU - Kato, Shungo
AU - Furutani, Hiroshi
AU - Makide, Yoshihiro
AU - Komazaki, Yuichi
AU - Hashimoto, Shigeru
AU - Tanaka, Shigeru
AU - Akimoto, Hajime
PY - 2002/12/16
Y1 - 2002/12/16
N2 - The dominant factors controlling the seasonal variations of ozone (O3) and three major oxidized nitrogen species, peroxyacetyl nitrate (PAN), nitrogen oxides (NOx), and nitric acid (HNO3), in northeast Asia are investigated by using a three-dimensional global chemical transport model to analyze surface observations made at Rishiri Island, a remote island in northern Japan. The model was evaluated by comparing with observed seasonal variations, and with the relationships between O3, CO, and PAN. We show that the model reproduces the chemical environment at Rishiri Island reasonably well, and that the seasonal cycles of O3, CO, NOy species, and VOCs are well predicted. The impact of local emissions on some of these constituents is significant, but is not the dominant factor affecting the seasonal cycles. The seasonal roles of chemistry and transport in controlling O3 and PAN are revealed by examining production/destruction and import/ export/deposition fluxes in the boundary layer over the Rishiri region. For O3, transport plays a key role throughout the year, and the regional photochemical contribution is at most 10% in summer. For PAN, in contrast, transport dominates in winter, while in-situ chemistry contributes as much as 75% in summer. It is suggested that the relative contribution of transport and in-situ chemistry is significantly different for O3 and PAN, but that the wintertime dominance of transport due to the long chemical lifetimes of these species is sufficient to drive the seasonal cycles of springtime maximum and summertime minimum characteristic of remote sites.
AB - The dominant factors controlling the seasonal variations of ozone (O3) and three major oxidized nitrogen species, peroxyacetyl nitrate (PAN), nitrogen oxides (NOx), and nitric acid (HNO3), in northeast Asia are investigated by using a three-dimensional global chemical transport model to analyze surface observations made at Rishiri Island, a remote island in northern Japan. The model was evaluated by comparing with observed seasonal variations, and with the relationships between O3, CO, and PAN. We show that the model reproduces the chemical environment at Rishiri Island reasonably well, and that the seasonal cycles of O3, CO, NOy species, and VOCs are well predicted. The impact of local emissions on some of these constituents is significant, but is not the dominant factor affecting the seasonal cycles. The seasonal roles of chemistry and transport in controlling O3 and PAN are revealed by examining production/destruction and import/ export/deposition fluxes in the boundary layer over the Rishiri region. For O3, transport plays a key role throughout the year, and the regional photochemical contribution is at most 10% in summer. For PAN, in contrast, transport dominates in winter, while in-situ chemistry contributes as much as 75% in summer. It is suggested that the relative contribution of transport and in-situ chemistry is significantly different for O3 and PAN, but that the wintertime dominance of transport due to the long chemical lifetimes of these species is sufficient to drive the seasonal cycles of springtime maximum and summertime minimum characteristic of remote sites.
KW - Oxidized nitrogen
KW - Photochemistry
KW - Seasonal cycle
KW - Transport
KW - Tropospheric ozone
UR - http://www.scopus.com/inward/record.url?scp=1342321357&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1342321357&partnerID=8YFLogxK
U2 - 10.1029/2001JD001497
DO - 10.1029/2001JD001497
M3 - Article
AN - SCOPUS:1342321357
VL - 107
JO - Journal of Geophysical Research E: Planets
JF - Journal of Geophysical Research E: Planets
SN - 2169-9313
IS - D23
M1 - 4706
ER -