Table 1. Descriptive Information for the SEARCH Sites

Name

Type

Setting

Lat.

Long.

Elev.

SCION Start

SEARCH Start

End Date

 

 

 

(N)

(W)

(m)

(mm/dd/yy)

(mm/dd/yy)

(mm/dd/yy)

Jefferson St., Atlanta (ATL)

urban

Industrial-Residential

33.776

84.413

275

n/a

8/01/98

n/a

Yorkville, GA (YRK)

rural

Forest-Agricultural.

33.931

85.046

395

6/1/92

5/6/98

n/a

N. Birmingham, AL (BHM)

urban

Industrial.-Residential

33.553

86.815

200

n/a

10/23/98

n/a

Centreville, AL (CTR)

rural

Forest

32.902

87.250

135

6/1/92

5/11/98

n/a

Gulfport, MS (GFP)

urban

Residential

30.391

89.050

5

n/a

4/13/99

n/a

Oak Grove, MS (OAK)

rural

Forest

30.985

88.932

100

6/1/92

5/16/98

12/31/10

Pensacola, FL (PNS)

urban

Residential

30.437

87.256

5

n/a

2/01/99

12/31/09

OLF #8 (OLF)

suburb

Forest-Grass

30.551

87.376

45

n/a

1/14/99

n/a

 

 

Table 2.  Discrete (24-hour) Particle and Gas Measurements for SEARCH-IV.

 

Class

 

Analyte

Sample Device

 

Substrate

 

Sample Frequency

Anal. Method (Lab)

Det. Lt. (µg/m3)

 

 

 

 

 

 

 

PM2.5

mass

FRM

Teflon, 47 mm

Daily

gravimetry (ARA)

0.12

 

anions

PCM (CH1)

Teflon, 47 mm

3-day

IC (ARA)

0.001-0.009

 

cations

PCM (CH1)

Teflon, 47 mm

3-day

IC (ARA)

0.001-0.008

 

Vol.-nitrate

PCM (CH1)

Nylon, 47 mm

3-day

IC (ARA)

0.018

 

OC/EC

PCM (CH3)

Quartz, 37 mm

3-day

TOR (DRI)

0.08/0.05

 

WS elementsa

PCM (CH1)

Teflon, 47 mm

3-day

ICPMS (ARA)

0.001-0.018

 

trace elementsb

FRM

Teflon, 47 mm

Daily

XRF (ARA)

0.001-0.012

 

 

 

 

 

 

 

PMcoarse

mass

dichot

Teflon, 37 mm

3-day

gravimetry (ARA)

0.14

 

anions

dichot

Teflon, 37 mm

6-day

IC (ARA)

0.002-0.010

 

cations

dichot

Teflon, 37 mm

6-day

IC (ARA)

0.001-0.009

 

OC/ECc

dichot

Quartz, 37 mm

6-day

TOR (DRI)

0.10/0.06

 

WS elementsa

dichot

Teflon, 37 mm

6-day

ICPMS (ARA)

0.001-0.021

 

trace elementsb

dichot

Teflon, 37 mm

3-day

XRF (ARA)

0.001-0.015

 

 

Gasesd

 

 

NH3

HCl and other

acidic gasese

denuder

denuder

citric acid coated

carbonate coated

3-day

3-day

IC(ARA)

IC(ARA)

0.006

0.002-0.007

 

a - WS elements include Li through U, units are ng/m3, detection limits element-dependent

b - trace elements include Na through Pb, detection limits element-dependent

c - two sites per year through 2014

d - units for gases are part per billion (ppb)

e - one site only

 

 

Table 3.  SEARCH Continuous Measurements.

Category

Observable

Detection Approach

Maximum

Resolution

Det. Lt. (ppb or ug/m3)

 

 

 

 

 

Trace Gas

O3

UV-absorption

1-minute

1

 

NOa

CL

1-minute

0.05

 

NO2

photolysis/CL

1-minute

0.1

 

HNO3

denuder diff./Mo reduction/CL

1-minute

0.1

 

NOya

Mo reduction/CL

1-minute

0.1

 

SO2

UV-fluorescence

1-minute

0.2

 

CO

NDIR

1-minute

5

 

NH3b

denuder diff./Pt oxidation/CL

5-minute

0.2

 

 

 

 

 

PM2.5

mass

TEOM

5-minute

1

 

sulfate

Fe reduction/UV-fluorescence

5-minute

0.4

 

nitrate

filter diff./Mo reduction/CL

5-minute

0.2

 

ammonium

filter diff./Pt oxidation/CL

5-minute

0.1

 

TC

oxidative combustion (Sunset)

60-minute

0.5

 

OpticalEC

oxidative combustion (Sunset)

60-minute

0.5

 

BC

light absorption (Aethalometer)

5-minute

0.1

 

Bscat (dry)

nephelometry (RR M903)

5-minute

na

 

Babs (dry)

light absorption (aethalometer)

5-minute

na

 

 

 

 

 

PMcoarse

Massc

TEOM/particle concentrator

5-minute

1

 

 

 

 

 

Surface Met.

T, delta-T

RH, SR, BP

WS, WD

various

1-minute

na

 

Precipitation Surface wetness

Sigma thetad

 

 

 

 

 

 

a-high level NO/NOy also measured at BHM and JST

b-YRK, JST and BHM only

c-JST, BHM and GFP only

d-calculated variable

 

Please use the citation below for SEARCH reference.

Hansen, D.A.; Edgerton, E.S.; Hartsell, B.E.; Jansen, J.J.; Kandasamy, N.; Hidy, G.M.; Blanchard, C.L., 2003. The Southeastern Aerosol Research and Characterization Study: Part 1. Overview; J. Air & Waste Manage. Assoc., 53, 1460-1471.