Contribution of various microenvironments to the daily personal exposure to ultrafine particles: Personal monitoring coupled with GPS tracking

Gabriel Bekö, Birthe Uldahl Kjeldsen, Yulia Olsen, Jasper Schipperijn, Aneta Wierzbicka, Dorina Gabriela Karottki, Jørn Toftum, Steffen Loft, Geo Clausen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Abstract Exposure to ultrafine particles (UFP) may have adverse health effects. Central monitoring stations do not represent the personal exposure to UFP accurately. Few studies have previously focused on personal exposure to UFP. Sixty non-smoking residents living in Copenhagen, Denmark were asked to carry a backpack equipped with a portable monitor, continuously recording particle number concentrations (PN), in order to measure the real-time individual exposure over a period of ∼48 h. A GPS logger was carried along with the particle monitor and allowed us to estimate the contribution of UFP exposure occurring in various microenvironments (residence, during active and passive transport, other indoor and outdoor environments) to the total daily exposure. On average, the fractional contribution of each microenvironment to the daily integrated personal exposure roughly corresponded to the fractions of the day the subjects spent in each microenvironment. The home environment accounted for 50% of the daily personal exposure. Indoor environments other than home or vehicles contributed with ∼40%. The highest median UFP concentration was obtained during passive transport (vehicles). However, being in transit or outdoors contributed 5% or less to the daily exposure. Additionally, the subjects recorded in a diary the periods when they were at home. With this approach, 66% of the total daily exposure was attributable to the home environment. The subjects spent 28% more time at home according to the diary, compared to the GPS. These results may indicate limitations of using diaries, but also possible inaccuracy and miss-classification in the GPS data.
Original languageEnglish
JournalAtmospheric Environment
Volume110
Issue numberJune
Pages (from-to)122-129
Number of pages8
ISSN1352-2310
DOIs
Publication statusPublished - Jun 2015

Cite this

Bekö, Gabriel ; Kjeldsen, Birthe Uldahl ; Olsen, Yulia ; Schipperijn, Jasper ; Wierzbicka, Aneta ; Karottki, Dorina Gabriela ; Toftum, Jørn ; Loft, Steffen ; Clausen, Geo. / Contribution of various microenvironments to the daily personal exposure to ultrafine particles : Personal monitoring coupled with GPS tracking. In: Atmospheric Environment. 2015 ; Vol. 110, No. June. pp. 122-129.
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abstract = "Abstract Exposure to ultrafine particles (UFP) may have adverse health effects. Central monitoring stations do not represent the personal exposure to UFP accurately. Few studies have previously focused on personal exposure to UFP. Sixty non-smoking residents living in Copenhagen, Denmark were asked to carry a backpack equipped with a portable monitor, continuously recording particle number concentrations (PN), in order to measure the real-time individual exposure over a period of ∼48 h. A GPS logger was carried along with the particle monitor and allowed us to estimate the contribution of UFP exposure occurring in various microenvironments (residence, during active and passive transport, other indoor and outdoor environments) to the total daily exposure. On average, the fractional contribution of each microenvironment to the daily integrated personal exposure roughly corresponded to the fractions of the day the subjects spent in each microenvironment. The home environment accounted for 50{\%} of the daily personal exposure. Indoor environments other than home or vehicles contributed with ∼40{\%}. The highest median UFP concentration was obtained during passive transport (vehicles). However, being in transit or outdoors contributed 5{\%} or less to the daily exposure. Additionally, the subjects recorded in a diary the periods when they were at home. With this approach, 66{\%} of the total daily exposure was attributable to the home environment. The subjects spent 28{\%} more time at home according to the diary, compared to the GPS. These results may indicate limitations of using diaries, but also possible inaccuracy and miss-classification in the GPS data.",
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Contribution of various microenvironments to the daily personal exposure to ultrafine particles : Personal monitoring coupled with GPS tracking. / Bekö, Gabriel; Kjeldsen, Birthe Uldahl; Olsen, Yulia; Schipperijn, Jasper; Wierzbicka, Aneta; Karottki, Dorina Gabriela; Toftum, Jørn; Loft, Steffen; Clausen, Geo.

In: Atmospheric Environment, Vol. 110, No. June, 06.2015, p. 122-129.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Contribution of various microenvironments to the daily personal exposure to ultrafine particles

T2 - Personal monitoring coupled with GPS tracking

AU - Bekö, Gabriel

AU - Kjeldsen, Birthe Uldahl

AU - Olsen, Yulia

AU - Schipperijn, Jasper

AU - Wierzbicka, Aneta

AU - Karottki, Dorina Gabriela

AU - Toftum, Jørn

AU - Loft, Steffen

AU - Clausen, Geo

PY - 2015/6

Y1 - 2015/6

N2 - Abstract Exposure to ultrafine particles (UFP) may have adverse health effects. Central monitoring stations do not represent the personal exposure to UFP accurately. Few studies have previously focused on personal exposure to UFP. Sixty non-smoking residents living in Copenhagen, Denmark were asked to carry a backpack equipped with a portable monitor, continuously recording particle number concentrations (PN), in order to measure the real-time individual exposure over a period of ∼48 h. A GPS logger was carried along with the particle monitor and allowed us to estimate the contribution of UFP exposure occurring in various microenvironments (residence, during active and passive transport, other indoor and outdoor environments) to the total daily exposure. On average, the fractional contribution of each microenvironment to the daily integrated personal exposure roughly corresponded to the fractions of the day the subjects spent in each microenvironment. The home environment accounted for 50% of the daily personal exposure. Indoor environments other than home or vehicles contributed with ∼40%. The highest median UFP concentration was obtained during passive transport (vehicles). However, being in transit or outdoors contributed 5% or less to the daily exposure. Additionally, the subjects recorded in a diary the periods when they were at home. With this approach, 66% of the total daily exposure was attributable to the home environment. The subjects spent 28% more time at home according to the diary, compared to the GPS. These results may indicate limitations of using diaries, but also possible inaccuracy and miss-classification in the GPS data.

AB - Abstract Exposure to ultrafine particles (UFP) may have adverse health effects. Central monitoring stations do not represent the personal exposure to UFP accurately. Few studies have previously focused on personal exposure to UFP. Sixty non-smoking residents living in Copenhagen, Denmark were asked to carry a backpack equipped with a portable monitor, continuously recording particle number concentrations (PN), in order to measure the real-time individual exposure over a period of ∼48 h. A GPS logger was carried along with the particle monitor and allowed us to estimate the contribution of UFP exposure occurring in various microenvironments (residence, during active and passive transport, other indoor and outdoor environments) to the total daily exposure. On average, the fractional contribution of each microenvironment to the daily integrated personal exposure roughly corresponded to the fractions of the day the subjects spent in each microenvironment. The home environment accounted for 50% of the daily personal exposure. Indoor environments other than home or vehicles contributed with ∼40%. The highest median UFP concentration was obtained during passive transport (vehicles). However, being in transit or outdoors contributed 5% or less to the daily exposure. Additionally, the subjects recorded in a diary the periods when they were at home. With this approach, 66% of the total daily exposure was attributable to the home environment. The subjects spent 28% more time at home according to the diary, compared to the GPS. These results may indicate limitations of using diaries, but also possible inaccuracy and miss-classification in the GPS data.

KW - Ultrafine particles

KW - Indoor/outdoor exposure

KW - Active transport-physical activity

KW - Passive transport-vehicles

KW - Global Positioning System (GPS)

KW - Geographic Information System (GIS)

U2 - 10.1016/j.atmosenv.2015.03.053

DO - 10.1016/j.atmosenv.2015.03.053

M3 - Journal article

VL - 110

SP - 122

EP - 129

JO - Atmospheric Environment

JF - Atmospheric Environment

SN - 1352-2310

IS - June

ER -