Seasonal variation and chemical characterization of PM&amp;lt;sub&amp;gt;2.5&amp;lt;/sub&amp;gt;
in northwestern Philippines

Bagtasa, Gerry; Cayetano, Mylene G.; Yuan, Chung-Shin

doi:10.5194/acp-2017-931

Cited by 3 publications

(3 citation statements)

References 39 publications

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“…Cruz et al (2019) showed with sizeresolved aerosol measurements and positive matrix factorization modeling that five predominant pollution sources during the Southwest Monsoon include aged aerosol, sea salt, combustion, waste processing, and vehicular/resuspended dust. The period of time between November and April coincides with a dry season with more northeasterly winds (Bagtasa et al, 2018;Chang et al, 2005;Cruz et al, 2013;Moron et al, 2009), including influence from both East Asia and local burning activities (Hilario et al, 2020b(Hilario et al, , 2020c 2018). The same set of sources impacting the West Coast generally apply to the East Coast (Hand et al, 2012b(Hand et al, , 2019 with notable features being more influence from African dust (Aldhaif et al, 2020;Zuidema et al, 2019), enhanced agricultural burning (especially in the Southeast) (Sevimoglu and Rogge, 2019;Shingler et al, 2016), and extensive power plant emissions that have actually been reduced over time since the early 1990s leading to SO 4 2 − reductions (Hand et al, 2012a).…”

Section: Islands-maunamentioning

confidence: 99%

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Dadashazar

Hilario

et al. 2021

Atmospheric Environment

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This study examined spatial variations of precipitation accumulation and chemistry for six sites located on the West and East Coasts of the U.S., and one site each on the islands of Hawaii, Bermuda, and Luzon of the Philippines (specifically Manila). The nine coastal sites ranged widely in both mean annual precipitation accumulation, ranging from 40 cm (Mauna Loa, Hawaii) to 275 cm (Washington), and in terms of monthly profiles. The three island sites represented the extremes of differences in terms of chemical profiles, with Bermuda having the highest overall ion concentrations driven mainly by sea salt, Hawaii having the highest SO 4 2 − mass fractions due to the nearby influence of volcanic SO 2 emissions and mid-tropospheric transport of anthropogenic pollution, and Manila exhibiting the highest concentration of non-marine ions (NH 4 + non-sea salt[nss] SO 4 2 − , nss Ca 2+ , NO 3 − , nss K + , nss Na + , nss Mg 2+ ) linked to anthropogenic, biomass burning, and crustal emissions. The Manila site exhibited the most variability in composition throughout the year due to shifting wind directions and having diverse regional and local pollutant sources. In contrast to the three island sites, the North American continental sites exhibited less variability in precipitation composition with sea salt being the most abundant constituent followed by some

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Section: Islands-maunamentioning

confidence: 99%

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Dadashazar

Hilario

et al. 2021

Atmospheric Environment

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“…There are many other studies motivated by YMC and addressing YMC issues using data from satellites, global reanalysis products, and numerical models. These studies cover a wide range of topics, such as the diurnal cycle (Baranowski et al, 2019), MJO propagation over the MC (Burleyson et al, 2018; Pang et al, 2018) and its barrier effect (DeMott et al, 2018; Ling et al, 2019), atmospheric waves (Ruppert & Zhang, 2019; Takasuka et al, 2019), aerosol (Bagtasa et al, 2018; Cohen et al, 2018; Koplitz et al, 2018), the monsoon (Diong et al, 2019; Duan et al, 2019), the ITF and the ocean in general (Cao et al, 2019; Gordon et al, 2019; Hu et al, 2019; Liang et al, 2019), and prediction and predictability (Wang et al, 2019).…”

Section: Preliminary Resultsmentioning

confidence: 99%

Years of the Maritime Continent

Yoneyama

Zhang

2020

Geophysical Research Letters

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Years of the Maritime Continent (YMC) is a multiyear international program with participants from over 15 countries. Its overarching goal is to expedite the progress toward improving understanding and prediction of the local oceanic and atmospheric multiscale variability of the Indo-Pacific Maritime Continent (MC) and its global impacts. YMC is motivated by the unique role of the MC in both the local and global weather climate systems, our lack of understanding of the key processes governing this role, and persistent systematic biases and errors in numerical model output for the region. YMC builds a comprehensive observational data set of the MC weather climate system, encourages observation-modeling integration, and educates the next generation of scientists who will be the core workforce and leaders to further advance the study of the MC. Plain Language Summary Years of the Maritime Continent is a multiyear international program to study the weather climate system of the Indo-Pacific Maritime Continent and its global impacts. Systematic biases in regional rainfall produced by numerical forecast and climate models and incomplete knowledge of the regional weather climate system motivated this program. This program conducts field campaigns to collect atmospheric and oceanic observations. Its preliminary results reveal new information that encourage further researches by combining observations with numerical models. This article also serves as a solicitation for contributions to a cross-organization special collection of publications in journals of seven professional organizations. This special collection is intended to promote further studies on the diverse nature of the weather climate system of the Maritime Continent.

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“…Such phenomenon has been addressed by previous literature that long-range transport causes the deterioration of regional air quality in the downwind regions (Chuang et al, 2012). Moreover, interaction of air pollutants may occur in the boundary areas neighboring Taiwan Strait and Bashi Channel (Li et al, 2012;Bagtasa et al, 2018).…”

Section: Introductionmentioning

confidence: 95%

Inter-correlation of Chemical Compositions, Transport Routes, and Source Apportionment Results of Atmospheric PM2.5 in Southern Taiwan and the Northern Philippines

Tseng

Yuan

Bagtasa

et al. 2019

Aerosol Air Qual. Res.

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This study investigated the inter-correlation of atmospheric PM 2.5 between southern Taiwan and the northern Philippines. 24-hour samples of PM 2.5 were simultaneously collected at two remote sites, Checheng (Taiwan) and Laoag (Philippines), during all four seasons. The water-soluble ions, metallic elements, carbonaceous content, and anhydrosugars in the PM 2.5 were then analyzed to characterize the chemical fingerprint. Furthermore, principal component analysis, chemical mass balance (CMB) receptor modeling, and backward trajectory simulation were applied to resolve the source apportionment of PM 2.5 at both of the sites. The results showed that Checheng and Laoag were highly influenced by polluted air masses transported long-range from the north, producing elevated PM 2.5 concentrations during winter and spring. The water-soluble ions (WSIs) were abundant in secondary inorganic aerosols (SO 4 2-, NO 3-, and NH 4 +), which accounted for 34.1-76.0%. Crustal elements dominated the metallic content in the PM 2.5 , but the concentrations of trace elements originating from anthropogenic sources increased during the northwestern monsoon periods. More organic carbon (OC) than elemental carbon (EC) was found, with secondary OC (SOC) contributing approximately 23.9-38.9% to the former. Moreover, the level of levoglucosan highly correlated with those of K + and OC, confirming that these three substances are key indicators of biomass burning. The two sites exhibited similar chemical compositions for PM 2.5 , indicating the possibility of transport between Checheng and Laoag, and a paired t-test obtained a p-value of 0.030 (p < 0.05), implying a potential inter-correlation for PM 2.5 between southern Taiwan and the northern Philippines. The major sources of the PM 2.5 were soil dust, mobile sources, sea salt, and biomass burning along the northerly transport routes during winter and spring. The contribution of anthropogenic sources (i.e., industrial boilers, waste incinerators, and secondary aerosols) to the PM 2.5 frequently increased during winter and spring, unlike during summer, suggesting that the northerly transport of PM 2.5 highly affected particulate air pollution at both of the sites.

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Seasonal variation and chemical characterization of PM<sub>2.5</sub> in northwestern Philippines

Cited by 3 publications

References 39 publications

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Years of the Maritime Continent

Inter-correlation of Chemical Compositions, Transport Routes, and Source Apportionment Results of Atmospheric PM2.5 in Southern Taiwan and the Northern Philippines

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Seasonal variation and chemical characterization of PM&lt;sub&gt;2.5&lt;/sub&gt; in northwestern Philippines

Cited by 3 publications

References 39 publications

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Contrasting wet deposition composition between three diverse islands and coastal North American sites

Years of the Maritime Continent

Inter-correlation of Chemical Compositions, Transport Routes, and Source Apportionment Results of Atmospheric PM2.5 in Southern Taiwan and the Northern Philippines

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Seasonal variation and chemical characterization of PM<sub>2.5</sub> in northwestern Philippines