Tag: US-EPA

EANET Training on Air Quality Monitoring Systems Using Low-Cost Sensors

Posted on by Aurélia Lemoine

19 October 2023 – Bangkok, Thailand

The EANET Training on Air Quality Monitoring Systems Using Low­-Cost Sensors took place on 6 and 7 September 2023, in Hanoi, Viet Nam, and online. The event was jointly organized by the ADB, the Network Center for the EANET, and the Vietnam Institute of Meteorology, Hydrology, and Climate Change (IMHEN) and gathered 100 participants, online and in person, from the EANET Participating Countries and beyond, to learn about LCS equipment operation, quality assurance, data accuracy, early problem detection, and effective use of monitoring data.

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Opening Session

Ms. Karma Yangzom, Principal Environment Specialist at the Asian Development Bank (ADB), delivered Opening Remarks expressing gratitude for joining the Vietnam project with IMHEN. She highlighted the significance of the hybrid method in addressing monitoring resource constraints, emphasizing the need for meticulous use of LCS to ensure sensor functionality and data verification, emphasizing the importance of high-quality, verified data, and underlining the workshop’s objective to research proper LCS utilization while expressing appreciation to EANET for hosting the workshop with hopes of providing valuable information to participants.

Dr. Le Ngoc Cau, the Director of the Center of Environmental Research at the Vietnam Institute of Meteorology, Hydrology, and Climate Change (IMHEN), expressed gratitude to the Asia Center for Air Pollution Research, ACAP (the Network Center for the EANET) and ADB for their support in the project to establish an air quality system, highlighting the costliness of such systems in urban areas and the potential of LCS as a more affordable alternative if data accuracy can be ensured. The LCS has been installed in two provinces in Vietnam as part of the project, providing participants with a deeper understanding of its capabilities, and he thanked all the participants and EANET for organizing the workshop.

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Introduction to the use of Low-Cost Sensors in Vietnam and in other Asian Countries

Dr. Le Ngoc Cau delivered a presentation on IMHEN’s role, its air quality monitoring system, air quality modeling, and EANET activities in Vietnam. He highlighted the installation of a PM2.5 monitor in Hoa Binh station in 2015 and the collaborative installation of LCS at the same station with the Network Center. Dr. Cau emphasized the importance of verifying LCS data for reliability and the need to figure out how to integrate LCS and conventional monitoring data. They expressed interest in further collaboration with international organizations.

Ms. Karma Yangzom shared experiences from Asian countries regarding the use of Air Quality sensors in ADB projects aimed at enhancing awareness and efforts to improve air quality. She highlighted the stability of AQ Mesh sensors, which only require sensor replacements every two years, and emphasized the use of LCS to present air quality information to the public. She highlighted the importance of ensuring the reliability of the data generated from the LCS.

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EANET Projects on LCS Technical studies

Dr. Akie Yuba, a Senior Researcher from ACAP, provided a report on LCS technical studies in Vietnam and Myanmar, which were carried out as part of EANET Project Activities. In Hoa Binh, Vietnam, five LCS units were installed, with a specific focus on PM2.5 and other parameters. In Yangon, Myanmar, LCS units, specifically GBiot and Haz Scanner, were utilized for monitoring PM2.5, O3, NO2, and meteorological data during both monsoon and non-monsoon seasons. A good correlation was observed in the data, though different values were displayed in the slopes, emphasizing the need for blackout preparedness to prevent electricity voltage fluctuations.

Dr. Hiroaki Minoura, a Guest Researcher at ACAP demonstrated, along with Dr. Yuba, how to install an LCS, how to initiate it, to connect it to a data server, and how to retrieve LCS data when there are data communication issues.

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Dr. Kazuhiro Misaka, Director of Green Blue Corporation, a private company specializing in the inspection, and maintenance of environmental monitoring and measurement equipment, delivered a presentation on data screening and analysis obtained with LCS and the Hybrid Air Quality Monitoring Network (HAQMN), accompanied by Dr. Akie Yuba and Dr. Hiroaki Minoura. Dr. Misaka explained the process of screening raw LCS data and removing noise signals. Dr. Yuba discussed the screening and validation of hourly LCS data, while Dr. Minoura covered topics related to data interpretation, visualization, and trend analysis.

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Challenges and Ways Forward

In the last session, Dr. Alison Simcox from the U.S. Environmental Protection Agency (US-EPA) was invited to share insights on LCS experiences. She clarified that LCS data was not deemed an official guideline, and further studies on its functionality were being considered. Two key questions were introduced: the challenges encountered by LCS and Hybrid Air Quality Monitoring Networks (HAQMN) in Asian countries and potential collaborations for promoting LCS in these regions. Commenting on the wrap-up for the way forward, challenges related to technology and policy in utilizing LCS were emphasized, with a focus on the need for capacity building to address issues such as calibration and data interpretation. Dr. Alison stressed the importance of understanding the purpose of LCS usage, whether it was identifying wildfires, creating smoke maps, or monitoring global changes in PM2.5.

Mr. Kenichiro Fukunaga, Deputy Director General of ACAP, delivered the Closing Remarks and conveyed his gratitude to various organizations and participants for their contributions to the workshop and to the EANET Low-cost sensor project. He expressed expectations for the expansion and enhancement of LCS activities in monitoring, research, and capacity building.

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Useful Resources:

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  • View the workshop’s photos on Flickr.

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Find out more about EANET’s Project Fund and Project Activities.

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Photo credits: cover photo of Vietnam (2021) by Hoach Le Dinh; all other photos: all rights reserved to EANET.

The 13th International Workshop on Atmospheric Modeling Research in East Asia

Posted on by Aurélia Lemoine

1 February 2023 – Niigata, Japan

The Network Center for the EANET co-organized the 13th International Workshop on Atmospheric Modeling Research in East Asia with the community of MICS-Asia, on 22-23 December 2022. About 60 participants joined the virtual workshop.

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Improving Air Quality Models: from Data to Policy

According to the United States Environment Protection Agency (EPA), air quality modeling is “a mathematical simulation of how air pollutants disperse and react in the atmosphere to affect ambient air quality.” Through these calculations, researchers and policymakers develop predicted scenarios and design strategies to reduce the adverse effects of air pollution.

Over the years, the EANET has maintained a close relationship with the community of Model Inter-Comparison Studies for Asia (MICS-Asia). The International Workshop on Atmospheric Modeling Research in East Asia is a regular workshop of MICS-Asia which has received support from the EANET throughout the previous Medium Term Plans and was part of the EANET Project Activities in 2022. Summaries of previous MICS-Asia workshops are available in the Reports of the Session of the Scientific Advisory Committee (SAC) on the EANET.

Four working groups were established as part of the MICS-Asia Phase IV: the Air Quality Model working group, the Air Quality and Climate Model working group, the Emission Inventory working group, and the Observation working group. MICS-Asia Phase IV working groups focus on specific issues including the intercomparison of air quality models, the study of the influence of climate change on the status of air quality, the development of reliable emission inventories for model working groups, and the survey and collection of data to establish trends of concentrations of air pollutants in East Asia.

Among other sources, MICS-Asia experts referred to the results of the EANET’s 4th Periodic Report on the State of Acid Deposition in East Asia (PRSAD4) and to the EANET monitoring data to conduct their research.

Screenshot from some participants during the virtual 13th International Workshop on Atmospheric Modeling Research in East Asia

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Modeling and Impact Assessment Studies

During the workshop, international experts in modeling and impact assessment studies shared various presentations based on research activities in Asia and beyond.

Dr. Christian Hogrefe, from the U. S. Environmental Protection Agency, introduced the Air Quality Modelling Evaluation International Initiative Phase 4 (AQMEII4) which applies detailed dry deposition diagnostics to a range of air quality models and their deposition schemes. Dr. Baozhu Ge, from the Institute of Atmospheric Physics, Chinese Academy of Science, shared a presentation on the enhanced wet deposition of nitrogen induced by a landfalling typhoon over East Asia. Dr. Natsumi Kawano, from the Center for Environmental Science, in Saitama, Japan, gave a presentation on the impact of future climate change on tropospheric ozone in Japan using the WRF-CMAQ modeling system and the RCP8.5 scenario. Dr. Syuichi Itahashi, from the Central Research Institute of Electric Power Industry, Japan, shared a presentation on the changes in transboundary aerosol components due to the emission variations in East Asia. Dr. Xiao Tang, from the Institute of Atmospheric Physics, Chinese Academy of Science, gave a presentation on high-resolution aerosol data over China simulated by the NAQPMS modeling system and an inversed emission inventory. Dr. Naoyuki Yamashita, from the Forestry and Forest Products Research Institute, Japan, shared a presentation on the critical load of soil acidification and surface water eutrophication in the EANET Participating Countries, and Dr. Baiyao Xu, from Nanjing University, China, gave a presentation on the impacts of meteorological factors and ozone variation on crop yields in China related to the carbon neutrality objectives in 2060 and based on RegCM-Chem-YIBs.

Results from the MICS-Asia Phase IV working groups’ research activities and collaboration with international experts will allow to improve the scientific understanding of air quality issues in the region, but also provide informed knowledge for policy-making in Asia.

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Useful Resources

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Photo credits: featured photo of Dong Van, Viet Nam (2021) by Giles Freeman on Unsplash ; other photos: all rights reserved to EANET.

EANET kicks-off its first Project Fund Activity on Volatile Organic Compounds

Posted on by Aurélia Lemoine

16 February 2023 – Niigata, Japan

Under the leadership of the Ministry of Environment of Japan and with the technical support of the Network Center for the EANET, the first EANET Project Activity launched its online kick-off meeting on 15 February. It gathered over 40 participants mainly from Japan, Mongolia, the Philippines, the Republic of Korea, and Thailand, involved in sharing or receiving technical assistance related to Volatile Organic Compounds (VOCs) monitoring.

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Why Volatile Organic Compounds?

Since the recent expansion of the scope of the EANET from acid deposition monitoring to wider air pollution action, the Network has started to carry out activities related to additional chemical species, including Volatile Organic Compounds (VOCs).

VOCs are “compounds that have a high vapor pressure and low water solubility. Many VOCs are human-made chemicals that are used and produced in the manufacture of paints, pharmaceuticals, and refrigerants” according to the US-EPA. In addition, several emission sources such as biogenic emissions, forest fires, waste burning including plastic, automobile exhaust, fossil fuel burning, and stock farming can produce VOCs. Exposure to VOCs may have various dangerous health effects from eyes, throat, and nose irritation to more serious conditions such as liver, kidney, or central nervous system damage, sometimes leading to cancer.

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Representation of PM2.5 and Ozone Co-contrail, by Prof. Hajime Akimoto (all rights reserved).

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VOCs are also precursors of particulate matter and ozone. It is important to measure VOCs to better understand how to mitigate air pollutants emissions.

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Learning more about VOCs emissions in East Asia

VOCs monitoring is complex due to its complicated source characteristics and costly measuring technology. For this reason, its monitoring is still at an early stage in Asia.

The “Feasibility for Promoting VOCs related Capacity Building in the EANET” project is part of the first batch of EANET Projects funded by the EANET Project Fund. Supported by the Ministry of the Environment, Japan, the project is coordinated by the Network Center for the EANET.

Through this project, experts in VOCs from the Center for Environmental Science in Saitama (CESS), in Japan will share their knowledge and assist the government officials from Mongolia and from the Philippines to develop their 3-year national implementation plan. During the kick-off meeting, Government representatives from the Philippines and Mongolia shared their plans and priorities for tackling VOCs.

Screenshot from participants during the kick-off meeting

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In addition, a VOC Advisory Group composed of experts from the NC and EANET countries has been brought together and will also give guidance on feasible measurement methods, data analysis, identification of the target species to measure VOCs, and feasible reduction measures.

At this stage, the implementation partners are environmentalists from Mongolia and from the Philippines. However, the project’s goal is to serve all the EANET countries and be further replicated.

The next meeting will take place in person in Manila in May 2023 to continue discussions on the feasibility and methodology of VOCs management.

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Interested in finding out more about the EANET Project Fund? Read more on how to fund or submit an EANET Project.

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Photo credits: featured photo by Anton Eprev on Unsplash (2019); other photos: all rights reserved to EANET.

EANET Seminar on Expanding Monitoring Systems using LCS

Posted on by Aurélia Lemoine

23 August 2022 – Niigata, Japan

The Network Center for the EANET organized the Seminar on Expanding Monitoring Systems using Low-Cost Sensor (LCS) online on 21 July 2022. It gathered representatives, experts, and practitioners of air quality monitoring from the EANET Participating Countries, and other participants from international organizations, academia, and monitoring-related service providers. 127 participants joined the Seminar.

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Opening Session

The Seminar started with the Opening and Welcome Remarks by Dr. Shiro Hatakeyama, Director General of the Asia Center for Air Pollution Research (ACAP) in charge of the NC for the EANET, and by Dr. Mushtaq Memon, Regional Coordinator for Chemicals and Pollution Action Subprogramme, UNEP Regional Office for Asia and the Pacific. Remarks were followed by an Introductory Presentation by Mr. Taku Ohmura from the Overseas Environmental Cooperation Center, Japan (OECC) on the Overview of issues and opportunities of using LCS for air quality administrations and surveys.

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Understanding Challenges and Opportunities of LCS

Key presentations by Dr. Supat Wangwongwatana, a Senior Instructor of the Faculty of Public Health, at Thammasat University, Thailand, and by Dr. Alison Simcox from the United States Environmental Protection Agency (US-EPA), delved into the limitations and opportunities of Low-cost sensor technology (LCS) for measuring air quality in the contexts of Thailand and of the United States.

Dr. Keiichi SATO, Head of the Atmospheric Research Department at ACAP, in charge of the NC for the EANET, then introduced the results of a survey on a Hybrid Air Quality Monitoring Network (HAQMN) and related technical studies in five EANET countries, namely Japan, Indonesia, Myanmar, Thailand, and Viet Nam.

His presentation was followed by discussions and presentations by Ms. Karma Yangzom, a Principal Environment Specialist from the Sustainable Development and Climate Change Department, at the Asian Development Bank (ADB), on ADB’s experience with LCS as part of the Technical Assistance (TA) 9608 on “Strengthening Knowledge and Actions for Air Quality Improvement”, and by Ms. Maria-Katharina Patdu’s presentation, an Associate Programme Officer, from the Asia Pacific Clean Air Partnership (APCAP), at UNEP Regional Office for Asia and the Pacific, on air quality data challenges and opportunities in developing Asia.

While the lack of precision of LCS and the variety of qualities and standards of sensors, may lead to data misinterpretation and presentation issues, keynote speakers and panelists mentioned that the cost-efficiency of LCS and the wide use of these air quality sensors by “citizen-scientists” educate the public and inspire behavioral changes. In addition, the effective utilization of regular monitoring data for the quality control of LCS, the importance of consistent city, regional, and country-level monitoring, and the continued cooperation with other networks and international organizations, were also key points presented to mitigate the limitations of LCS.

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Download the Workshop’s Presentations

–Issues of LCS and Efforts Against the Issues: Thailand’s Experiences (presented by Dr. Supat Wangwongwatana)

–US-EPA’s efforts on wise use of LCS (presented by Dr. Alison Simcox)

–Results of the survey on HAQMN and technical studies in some EANET Participating Countries (presented by Dr. Keiichi Sato)

–Experience in using Low-Cost Sensors under ADB TA 9608 (presented by Ms. Karma Yangzom)

–Air quality data challenges and opportunities in developing Asia (presented by Ms. Maria Katherina Patdu)

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For further inquiries, contact the Network Center for the EANET.

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Photo credits: All rights reserved to EANET.