Real time mobile sensing of the environment

Peter LandshoffRod JonesMichael SimmonsEiman KanjoIq MeadMark HayesMark Calleja

NO2 mobile sensing:

[Calleja]

GPS(location)

GPRS(data

transmission)

SENSORS

archive

Real time data processing/ data

assimilation

PRODUCTS

Environment…..Regulation……Exposure…..Transport…..……

Other data(met, traffic….)

mobilesensor networkCombine technologies to

provide sensitive low cost sensor network

[Kanjo, Louden, Mead]

[Hayes]

Changes in air quality driven by both traffic and meteorology

Pollution events

Sensor reproducibility

Multiple species measurement

[Stewart, Jobalja, Mead]

Carbon Monoxide

Multi-species real time high spatial resolution mapping of air quality in complex environments

Nitrogen Dioxide

Nitric Oxide

Urban composition is highly structured, variable, interdependent and complex….[Stewart, Jobalja, Mead]

Sensors 14:30-14:45 14:45-15:30 15:30-16:30 16:30-17:20 17:20-17:30

A12 (gp1) Chem ZONE A ZONE B ZONE C CCB

A13 (gp1) Dept.

A15 (gp2) ZONE B ZONE C ZONE A

A16 (gp2)

A17 (gp3) ZONE C ZONE A ZONE B Chem

A19 (gp3) CCB Dept.

• 29/01/2009

• 14:30 - 17:30

•Central Cambridge split into 3 zones (A, B & C)

• 6 sensors divided into 3 groups.

• A14 joined expt. at 16:30.

CCB

Chem Dept

Preliminary comparison with validated site (CCC)

Laboratory cal/cross interference

Junction (Very high traffic density)

High traffic density

Static traffic

Moderate traffic density

Low traffic density

No traffic

Gonville Place, 15:48 [CO] = 2,000 ppb

Lensfield Rd, 14:47 [CO] = 714 ppb

Emmanuel Rd, 17:10 [CO]= 1,062 ppbA12 30s COA12 30s CO

Central Central CambridgeCambridge

Bus Station, 16:14 [NO] = 1. 527 ppm

Zone B average,14:45-15:30 [NO] = 0.151 ppm

Zone A average,16:30-17:20 [NO] = 0.163 ppm

A15 30s NOA15 30s NO

Zone A Zone A CambridgeCambridge

Lensfield Rd, 17:07 [NO] = 392.9 ppb

A15 30s NOA15 30s NO

Zone C Zone C CambridgeCambridge

Emmanuel Rd, 16:14 [NO] = 820 ppb

A15 30s NOA15 30s NO

Zone B Zone B CambridgeCambridge

Gonville Place, 15:35 [NO] = 358 ppb

15:01-15:04

All conc. in ppb

[CO] = 126 ± 15[NO] = 188 ± 42[NO2] = 30 ± 3

[CO] = 186 ± 17 [NO] = 59 ± 15[NO2] = 31.8 ± 0.5

[CO] = 260 ± 22 [NO] = -13 ± 5[NO2] = 26.7 ± 0.3

[CO] = 89 ± 26 [NO] = -33 ± 5[NO2] = 29.5 ± 0.8

[CO] = 84 ± 14[NO] = 83 ± 15 [NO2] = 31.8 ± 0.5

[CO] = 616 ± 22 [NO] = 12 ± 6 [NO2] = 30.7 ± 0.5

16:01-16:04

All conc. in ppb

[CO] = -1 ± 17 [NO] = 105 ± 16[NO2] = 26.9 ± 0.3

[CO] = 31 ± 6 [NO] = 37 ± 7[NO2] = 31.9 ± 0.8

[CO] = 133 ± 28[NO] = 43 ± 12[NO2] = 34.1 ± 0.7

[CO] = 137 ± 9 [NO] = 60 ± 7 [NO2] = 29.9 ± 0.6

17:01-17:04

All conc. in ppb

[CO] = 31 ± 12[NO] = 43 ± 10[NO2] = 29.8 ± 0.5

[CO] = 133 ± 3 [NO] = -11 ± 3[NO2] = 30.1 ± 0.3

[CO] = -26 ± 5[NO] = 190 ± 19[NO2] = 27.7 ± 0.2

[CO] = 192 ± 19[NO] = 145 ± 19[NO2] = 36 ± 2

[CO] = 57 ± 23[NO] = 23 ± 8 [NO2] = 33.0 ± 0.6

Technical progress• Phone software now robust (run-time >8 hours) • Visualisation now implemented using Google Earth

browser plug-in• eScience interface to database (OGSA-DAI)

implemented

Ongoing work

• Characterization of data quality & database cleansing

• Automatic data post-processing• Preparation for June 30th event• Logistics for large scale Cambridge

deployment

Map divided into zones

Areas covered in Central Valencia

2.28 Km

2.69 Km

CO overview, 8 sensors boxes

Exhaust Plume: in situ sensor detection of NO, NO2, CO

Wind direction

4 take-offs a.m. and p.m. clearly seen in NO2

New result: detection of aircraft plume using portable low cost mobile sensors (NO, NO2, CO)

Take-offs:

Courtesy of OMEGA:www.omega.mmu.ac.uk

Summary and future directions

Achievements•Low cost mobile sensor unit for real time NO, NO2 and

CO, including GPS, GPRS•Multiple sensor network (currently 20 units)•Data capture

Future (within MESSAGE)•Extend to > 60 units•Extend to CO2, VOCs, SO2

Future (beyond MESSAGE)•Additional species, aerosols•NERC/LHR?

Robin’s last slide?