Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-7233-2019 |
Ozone and carbon monoxide observations over open oceans on R/V Mirai from 67 degrees S to 75 degrees N during 2012 to 2017: testing global chemical reanalysis in terms of Arctic processes, low ozone levels at low latitudes, and pollution transport | |
Kanaya, Yugo1; Miyazaki, Kazuyuki1,2; Taketani, Fumikazu1; Miyakawa, Takuma1; Takashima, Hisahiro1,3; Komazaki, Yuichi1; Pan, Xiaole1,7; Kato, Saki3; Sudo, Kengo1,4; Sekiya, Takashi1; Inoue, Jun5; Sato, Kazutoshi6; Oshima, Kazuhiro1,8 | |
2019-06-03 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:11页码:7233-7254 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; USA; Peoples R China |
英文摘要 | Constraints from ozone (O-3) observations over oceans are needed in addition to those from terrestrial regions to fully understand global tropospheric chemistry and its impact on the climate. Here, we provide a large data set of ozone and carbon monoxide (CO) levels observed (for 11 666 and 10 681 h, respectively) over oceans. The data set is derived from observations made during 24 research cruise legs of R/V Mirai during 2012 to 2017, in the Southern, Indian, Pacific, and Arctic oceans, covering the region from 67 degrees S to 75 degrees N. The data are suitable for critical evaluation of the over-ocean distribution of ozone derived from global atmospheric chemistry models. We first give an overview of the statistics in the data set and highlight key features in terms of geographical distribution and air mass type. We then use the data set to evaluate ozone mixing ratio fields from the tropospheric chemistry reanalysis version 2 (TCR-2), produced by assimilating a suite of satellite observations of multiple species into a global atmospheric chemistry model, namely CHASER. For long-range transport of polluted air masses from continents to the oceans, during which the effects of forest fires and fossil fuel combustion were recognized, TCR-2 gave an excellent performance in reproducing the observed temporal variations and photochemical buildup of O-3 when assessed from Delta O-3/Delta CO ratios. For clean marine conditions with low and stable CO mixing ratios, two focused analyses were performed. The first was in the Arctic (> 70 degrees N) in September every year from 2013 to 2016; TCR-2 underpredicted O-3 levels by 6.7 ppbv (21 %) on average. The observed vertical profiles from O-3 soundings from R/V Mirai during September 2014 had less steep vertical gradients at low altitudes (> 850 hPa) than those obtained by TCR-2. This suggests the possibility of a more efficient descent of the O-3-rich air from above than assumed in the models. For TCR-2 (CHASER), dry deposition on the Arctic ocean surface might also have been overestimated. In the second analysis, over the western Pacific equatorial region (125-165 degrees E, 10 degrees S to 25 degrees N), the observed O-3 level more frequently decreased to less than 10 ppbv in comparison to that obtained with TCR-2 and also those obtained in most of the Atmospheric Chemistry Climate Model Intercomparison Project (ACCMIP) model runs for the decade from 2000. These results imply loss processes that are unaccounted for in the models. We found that the model's positive bias positively correlated with the daytime residence times of air masses over a particular grid, namely 165-180 degrees E and 1530 degrees N; an additional loss rate of 0.25 ppbvh(-1) in the grid best explained the gap. Halogen chemistry, which is commonly omitted from currently used models, might be active in this region and could have contributed to additional losses. Our open data set covering wide ocean regions is complementary to the Tropospheric Ozone Assessment Report data set, which basically comprises ground-based observations and enables a fully global study of the behavior of O-3. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000470245600001 |
WOS关键词 | MARINE BOUNDARY-LAYER ; ATMOSPHERIC BLACK CARBON ; NORTH PACIFIC-OCEAN ; WESTERN PACIFIC ; TROPOSPHERIC OZONE ; IODINE MONOXIDE ; EASTERN PACIFIC ; DRY DEPOSITION ; CHEMISTRY ; MODEL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183993 |
专题 | 地球科学 |
作者单位 | 1.Japan Agcy Marine Earth Sci & Technol JAMSTEC, RIGC, Yokohama, Kanagawa 2360001, Japan; 2.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 3.Fukuoka Univ, Fac Sci, Fukuoka, Fukuoka 8140133, Japan; 4.Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan; 5.Natl Inst Polar Res, Arctic Environm Res Ctr, Tachikawa, Tokyo 1908518, Japan; 6.Kitami Inst Technol, Sch Earth Energy & Environm Engn, Kitami, Hokkaido 0908507, Japan; 7.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China; 8.Inst Environm Sci, Dept Radioecol, Rokkasho 0393212, Japan |
推荐引用方式 GB/T 7714 | Kanaya, Yugo,Miyazaki, Kazuyuki,Taketani, Fumikazu,et al. Ozone and carbon monoxide observations over open oceans on R/V Mirai from 67 degrees S to 75 degrees N during 2012 to 2017: testing global chemical reanalysis in terms of Arctic processes, low ozone levels at low latitudes, and pollution transport[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(11):7233-7254. |
APA | Kanaya, Yugo.,Miyazaki, Kazuyuki.,Taketani, Fumikazu.,Miyakawa, Takuma.,Takashima, Hisahiro.,...&Oshima, Kazuhiro.(2019).Ozone and carbon monoxide observations over open oceans on R/V Mirai from 67 degrees S to 75 degrees N during 2012 to 2017: testing global chemical reanalysis in terms of Arctic processes, low ozone levels at low latitudes, and pollution transport.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(11),7233-7254. |
MLA | Kanaya, Yugo,et al."Ozone and carbon monoxide observations over open oceans on R/V Mirai from 67 degrees S to 75 degrees N during 2012 to 2017: testing global chemical reanalysis in terms of Arctic processes, low ozone levels at low latitudes, and pollution transport".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.11(2019):7233-7254. |
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