scholarly journals Evaluation of long-term tropospheric NO2data obtained by GOME over East Asia in 1996–2002

2005 ◽  
Vol 32 (11) ◽  
Author(s):  
H. Irie
Keyword(s):  
East Asia

scholarly journals Regional variability in black carbon and carbon monoxide ratio from long-term observations over East Asia: assessment of representativeness for black carbon (BC) and carbon monoxide (CO) emission inventories

2020 ◽  
Vol 20 (1) ◽  
pp. 83-98 ◽  
Author(s):  
Yongjoo Choi ◽  
Yugo Kanaya ◽  
Seung-Myung Park ◽  
Atsushi Matsuki ◽  
Yasuhiro Sadanaga ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
South Korea ◽  
East Asia ◽  
Black Carbon ◽  
North Korea ◽  
Northeast China ◽  
Emission Inventory ◽  
East China ◽  
Co Emission

Abstract. The black carbon (BC) and carbon monoxide (CO) emission ratios were estimated and compiled from long-term, harmonized observations of the ΔBC∕ΔCO ratios under conditions unaffected by wet deposition at four sites in East Asia, including two sites in South Korea (Baengnyeong and Gosan) and two sites in Japan (Noto and Fukuoka). Extended spatio-temporal coverage enabled estimation of the full seasonality and elucidation of the emission ratio in North Korea for the first time. The estimated ratios were used to validate the Regional Emission inventory in ASia (REAS) version 2.1 based on six study domains (“East China”, “North China”, “Northeast China”, South Korea, North Korea, and Japan). We found that the ΔBC∕ΔCO ratios from four sites converged into a narrow range (6.2–7.9 ng m−3 ppb−1), suggesting consistency in the results from independent observations and similarity in source profiles over the regions. The BC∕CO ratios from the REAS emission inventory (7.7 ng m−3 ppb−1 for East China – 23.2 ng m−3 ppb−1 for South Korea) were overestimated by factors of 1.1 for East China to 3.0 for South Korea, whereas the ratio for North Korea (3.7 ng m−3 ppb−1 from REAS) was underestimated by a factor of 2.0, most likely due to inaccurate emissions from the road transportation sector. Seasonal variation in the BC∕CO ratio from REAS was found to be the highest in winter (China and North Korea) or summer (South Korea and Japan), whereas the measured ΔBC∕ΔCO ratio was the highest in spring in all source regions, indicating the need for further characterization of the seasonality when creating a bottom-up emission inventory. At levels of administrative districts, overestimation in Seoul, the southwestern regions of South Korea, and Northeast China was noticeable, and underestimation was mainly observed in the western regions in North Korea, including Pyongyang. These diagnoses are useful for identifying regions where revisions in the inventory are necessary, providing guidance for the refinement of BC and CO emission rate estimates over East Asia.

scholarly journals Mapping of affordability levels for photovoltaic-based electricity generation in the solar belt of sub-Saharan Africa, East Asia and South Asia

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sándor Szabó ◽  
Irene Pinedo Pascua ◽  
Daniel Puig ◽  
Magda Moner-Girona ◽  
Mario Negre ◽  
...  
Keyword(s):  
East Asia ◽  
South Asia ◽  
Electricity Generation ◽  
Sub Saharan Africa ◽  
Solar Photovoltaic ◽  
Term Operation ◽  
Sub Saharan ◽  
High Level ◽  
Do So

AbstractLack of access to modern forms of energy hampers efforts to reduce poverty. The provision of electricity to off-grid communities is therefore a long-standing developmental goal. Yet, many off-grid electrification projects neglect mid- and long-term operation and maintenance costs. When this is the case, electricity services are unlikely to be affordable to the communities that are the project’s primary target. Here we show that, compared with diesel-powered electricity generation systems, solar photovoltaic systems are more affordable to no less than 36% of the unelectrified populations in East Asia, South Asia, and sub-Saharan Africa. We do so by developing geo-referenced estimates of affordability at a high level of resolution (1 km2). The analysis illustrates the differences in affordability that may be found at the subnational level, which underscores that electrification investments should be informed by subnational data.

scholarly journals Regional Features of Long-Term Exposure to PM2.5 Air Quality over Asia under SSP Scenarios Based on CMIP6 Models

2021 ◽  
Vol 18 (13) ◽  
pp. 6817
Author(s):  
Sungbo Shim ◽  
Hyunmin Sung ◽  
Sanghoon Kwon ◽  
Jisun Kim ◽  
Jaehee Lee ◽  
...  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
East Asia ◽  
Climate Model ◽  
Fine Particulate Matter ◽  
Coupled Model ◽  
Surface Air Temperature ◽  
Quality Controls ◽  
Quality Guidelines

This study investigates changes in fine particulate matter (PM2.5) concentration and air-quality index (AQI) in Asia using nine different Coupled Model Inter-Comparison Project 6 (CMIP6) climate model ensembles from historical and future scenarios under shared socioeconomic pathways (SSPs). The results indicated that the estimated present-day PM2.5 concentrations were comparable to satellite-derived data. Overall, the PM2.5 concentrations of the analyzed regions exceeded the WHO air-quality guidelines, particularly in East Asia and South Asia. In future SSP scenarios that consider the implementation of significant air-quality controls (SSP1-2.6, SSP5-8.5) and medium air-quality controls (SSP2-4.5), the annual PM2.5 levels were predicted to substantially reduce (by 46% to around 66% of the present-day levels) in East Asia, resulting in a significant improvement in the AQI values in the mid-future. Conversely, weak air pollution controls considered in the SSP3-7.0 scenario resulted in poor AQI values in China and India. Moreover, a predicted increase in the percentage of aged populations (>65 years) in these regions, coupled with high AQI values, may increase the risk of premature deaths in the future. This study also examined the regional impact of PM2.5 mitigations on downward shortwave energy and surface air temperature. Our results revealed that, although significant air pollution controls can reduce long-term exposure to PM2.5, it may also contribute to the warming of near- and mid-future climates.

Long-term Mortality Changes in East Asia: Levels, Age Patterns, and Causes of Death

2014 ◽  
pp. 337-355 ◽  
Author(s):  
Zhongwei Zhao ◽  
Edward Jow-Ching Tu ◽  
Jiaying Zhao
Keyword(s):  
East Asia ◽  
Causes Of Death ◽  
Age Patterns ◽  
Long Term Mortality

scholarly journals The 2012 Senkaku Dispute: Origins and Lessons

2013 ◽  
pp. 97-101
Author(s):  
I. V. Dyachkov
Keyword(s):  
East Asia ◽  
Academic Community ◽  
North East ◽  
Short And Long Term

The recent Sino-Japanese conflict over the Senkaku (Diaoyu) Islands has turned the attention of the academic community toward growing nationalistic sentiment in North East Asia. This paper is an attempt to analyze the territorial dimension of the region’s nationalism, identify various factors that are bringing nationalism to the fore, warn of the possible dangers of using this political tool and make some short- and long-term predictions concerning the recent dispute.

Estimations of Long-Term nss-SO42– and NO3– Wet Depositions over East Asia by Use of Ensemble Machine-Learning Method

2020 ◽  
Vol 54 (18) ◽  
pp. 11118-11126
Author(s):  
Xingcheng Lu ◽  
Dehao Yuan ◽  
Yiang Chen ◽  
Jimmy C.H. Fung ◽  
Wenkai Li ◽  
...  
Keyword(s):  
Machine Learning ◽  
East Asia ◽  
Machine Learning Method ◽  
Learning Method ◽  
Ensemble Machine Learning

scholarly journals Long‐term changes of marine subtidal benthic communities in North East Asia (Yellow and Japan seas) in a global change context: A review

2020 ◽  
Vol 30 (7) ◽  
pp. 1451-1475 ◽  
Author(s):  
Linlin Chen ◽  
Konstantin A. Lutaenko ◽  
Xiaojing Li ◽  
Xinzheng Li ◽  
Zhengquan Zhou ◽  
...  
Keyword(s):  
Global Change ◽  
East Asia ◽  
Benthic Communities ◽  
North East ◽  
Long Term Changes ◽  
Change Context

scholarly journals Regional variability in black carbon and carbon monoxide ratio from long-term observations over East Asia: Assessment of representativeness for BC and CO emission inventories

2019 ◽  
Author(s):  
Yongjoo Choi ◽  
Yugo Kanaya ◽  
Seung-Myung Park ◽  
Atsushi Matsuki ◽  
Yasuhiro Sadanaga ◽  
...  
Keyword(s):  
South Korea ◽  
East Asia ◽  
North Korea ◽  
Northeast China ◽  
Emission Inventory ◽  
East China ◽  
Road Transportation ◽  
Regional Variability ◽  
Co Emission

Abstract. The BC/CO emission ratios were estimated and compiled from long-term, harmonized observations of the ΔBC/ΔCO ratios under conditions unaffected by wet deposition at four sites in East Asia, including two sites in Korea (Baengnyeong and Gosan) and two sites in Japan (Noto and Fukuoka). Extended spatio-temporal coverage enabled estimation of full seasonality and elucidation of the emission ratio in North Korea, for the first time. The estimated ratios were used to validate the Regional Emission inventory in Asia (REAS) version 2.1 based on six study domains (East China, North China, Northeast China, South Korea, North Korea, and Japan). We found that the ΔBC/ΔCO ratios from four sites converged into a narrow range (6.2–7.9 ng m−3 ppb−1), suggesting consistency in the results from independent observations and similarity in source profiles over the regions. The BC/CO ratios from the REAS emission inventory (7.7 ng m−3 ppb−1 for East China – 23.2 ng m−3 ppb−1 for South Korea) were overestimated by factors of 1.1 for East China to 3.0 for South Korea, whereas the ratio for North Korea (3.7 ng m−3 ppb−1 from REAS) was underestimated by a factor of 2.0, most likely due to inaccurate emissions from the road transportation sector. Seasonal variation in the BC/CO ratio from REAS was found to be the highest in winter (China and North Korea) or summer (South Korea and Japan), whereas the measured ΔBC/ΔCO ratio was highest in spring in all source regions, indicating the need for further characterization of seasonality when creating a bottom-up emission inventory. At levels of administrative districts, overestimation in Seoul, the southwest regions of South Korea, and Northeast China was noticeable, and underestimation was mainly observed in the western regions in North Korea, including Pyongyang. These diagnoses are useful for identifying the regions where revisions in the inventory are necessary, providing guidance for refinement of BC and CO emission rate estimates over East Asia.

“Trump’s First Year in Asia: Accelerating a Long-term Trend”

2018 ◽  
Vol 25 (2) ◽  
pp. 198-220 ◽  
Author(s):  
David C. Kang
Keyword(s):  
East Asia ◽  
The United States ◽  
First Year ◽  
Foreseeable Future ◽  
Real Possibility ◽  
Term Trend ◽  
Trade War ◽  
The Impact ◽  
Long Term Trend

What has been the impact of Donald J. Trump’s presidency on the place of the United States in East Asia? Trump already has shown a proclivity for upending the mainstream American consensus about grand strategy to East Asia, with the real possibility of a trade war with China or a shooting war with North Korea on the horizon. However, this article will place President Trump’s first year in office into a larger context of long-term decline of U.S. leadership and influence in East Asia, arguing that this trend has been underway for quite some time, and that Trump has not altered fundamentally this trajectory. Some of Trump’s actions may accelerate a decline in U.S. leadership, but by no means was Trump the first nor will he be the last U.S. president to deal with a swiftly changing East Asia. The region has been changing rapidly for decades, and there are no indications that this will stop anytime soon. However, continuing and gradual U.S. withdrawal from leadership does not mean less American-East Asia interaction. East Asia will remain the most important trading and investment region for the U.S. for the foreseeable future.

scholarly journals Long-term sky islands generate highly divergent lineages of a narrowly distributed stream salamander (Pachyhynobius shangchengensis) in mid-latitude mountains of East Asia

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Tao Pan ◽  
Hui Wang ◽  
Pablo Orozcoterwengel ◽  
Chao-Chao Hu ◽  
Gui-You Wu ◽  
...  
Keyword(s):  
East Asia ◽  
Sky Islands ◽  
Pachyhynobius Shangchengensis
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