Matches in SemOpenAlex for { <https://semopenalex.org/work/W4323314312> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W4323314312 abstract "Abstract. We report on the long-term performance of a popular low-cost PM2.5 sensor, the PurpleAir PA-II, at multiple sites in India, with the aim of identifying robust calibration protocols. We established 3 distinct sites in India (North India: Delhi, Hamirpur; South India: Bangalore), where we collocated PA-II with reference beta-attenuation monitors to characterize sensor performance and to model calibration relationships between PA-IIs and reference monitors for hourly data. Our sites remained in operation across all major seasons of India. Without calibration, the PA-IIs had high precision (Normalized Root Mean Square Error [NRMSE] among replicate sensors ≤ 15 %) and tracked the overall seasonal and diurnal signals from the reference instruments well (Pearson’s r ≥ 0.9) but were inaccurate (NRMSE ≥ 40 %). We used a comprehensive feature selection process to create optimized site-specific calibrations. Relative to the uncalibrated data, parsimonious least-squares long-term calibration models improved PA-II performance at all sites (cross-validated NRMSE: 20–30 %, R2: 0.82–0.95), particularly by reducing seasonal and diurnal biases. Because aerosol properties and meteorology vary regionally, the form of these long-term models differed by site. Likewise, using a moving-window calibration, we find a calibration scheme using seasonally specific information somewhat improves performance relative to a static long-term calibration model. In contrast, we demonstrate that a successful short-term calibration exercise for one season may not transfer reliably to other seasons. Overall, we demonstrate how the PA-II, when paired with a careful calibration scheme, can provide actionable information on PM2.5 in India with only modest irreducible uncertainty." @default.
- W4323314312 created "2023-03-07" @default.
- W4323314312 creator A5009378745 @default.
- W4323314312 creator A5009632704 @default.
- W4323314312 creator A5011298688 @default.
- W4323314312 creator A5015091639 @default.
- W4323314312 creator A5020398403 @default.
- W4323314312 creator A5029004224 @default.
- W4323314312 creator A5033795418 @default.
- W4323314312 creator A5036778229 @default.
- W4323314312 creator A5042698911 @default.
- W4323314312 creator A5062883058 @default.
- W4323314312 creator A5063662524 @default.
- W4323314312 creator A5071685324 @default.
- W4323314312 creator A5076295287 @default.
- W4323314312 date "2023-03-06" @default.
- W4323314312 modified "2023-10-10" @default.
- W4323314312 title "Site and Season Specific Calibrations Improve Low-cost Sensor Performance: Long-term Field Evaluation of PurpleAir Sensors in Urban and Rural India" @default.
- W4323314312 doi "https://doi.org/10.5194/amt-2023-35" @default.
- W4323314312 hasPublicationYear "2023" @default.
- W4323314312 type Work @default.
- W4323314312 citedByCount "1" @default.
- W4323314312 crossrefType "posted-content" @default.
- W4323314312 hasAuthorship W4323314312A5009378745 @default.
- W4323314312 hasAuthorship W4323314312A5009632704 @default.
- W4323314312 hasAuthorship W4323314312A5011298688 @default.
- W4323314312 hasAuthorship W4323314312A5015091639 @default.
- W4323314312 hasAuthorship W4323314312A5020398403 @default.
- W4323314312 hasAuthorship W4323314312A5029004224 @default.
- W4323314312 hasAuthorship W4323314312A5033795418 @default.
- W4323314312 hasAuthorship W4323314312A5036778229 @default.
- W4323314312 hasAuthorship W4323314312A5042698911 @default.
- W4323314312 hasAuthorship W4323314312A5062883058 @default.
- W4323314312 hasAuthorship W4323314312A5063662524 @default.
- W4323314312 hasAuthorship W4323314312A5071685324 @default.
- W4323314312 hasAuthorship W4323314312A5076295287 @default.
- W4323314312 hasBestOaLocation W43233143121 @default.
- W4323314312 hasConcept C105795698 @default.
- W4323314312 hasConcept C121332964 @default.
- W4323314312 hasConcept C139945424 @default.
- W4323314312 hasConcept C165838908 @default.
- W4323314312 hasConcept C205649164 @default.
- W4323314312 hasConcept C2781162219 @default.
- W4323314312 hasConcept C33923547 @default.
- W4323314312 hasConcept C39432304 @default.
- W4323314312 hasConcept C41008148 @default.
- W4323314312 hasConcept C61797465 @default.
- W4323314312 hasConcept C62520636 @default.
- W4323314312 hasConcept C62649853 @default.
- W4323314312 hasConceptScore W4323314312C105795698 @default.
- W4323314312 hasConceptScore W4323314312C121332964 @default.
- W4323314312 hasConceptScore W4323314312C139945424 @default.
- W4323314312 hasConceptScore W4323314312C165838908 @default.
- W4323314312 hasConceptScore W4323314312C205649164 @default.
- W4323314312 hasConceptScore W4323314312C2781162219 @default.
- W4323314312 hasConceptScore W4323314312C33923547 @default.
- W4323314312 hasConceptScore W4323314312C39432304 @default.
- W4323314312 hasConceptScore W4323314312C41008148 @default.
- W4323314312 hasConceptScore W4323314312C61797465 @default.
- W4323314312 hasConceptScore W4323314312C62520636 @default.
- W4323314312 hasConceptScore W4323314312C62649853 @default.
- W4323314312 hasLocation W43233143121 @default.
- W4323314312 hasOpenAccess W4323314312 @default.
- W4323314312 hasPrimaryLocation W43233143121 @default.
- W4323314312 hasRelatedWork W22115721 @default.
- W4323314312 hasRelatedWork W2211931904 @default.
- W4323314312 hasRelatedWork W2321234655 @default.
- W4323314312 hasRelatedWork W2369319632 @default.
- W4323314312 hasRelatedWork W2470062578 @default.
- W4323314312 hasRelatedWork W2952773340 @default.
- W4323314312 hasRelatedWork W2981861370 @default.
- W4323314312 hasRelatedWork W2982204590 @default.
- W4323314312 hasRelatedWork W3171007296 @default.
- W4323314312 hasRelatedWork W4254851101 @default.
- W4323314312 isParatext "false" @default.
- W4323314312 isRetracted "false" @default.
- W4323314312 workType "article" @default.