Infrared optical constants of aerosols at some locations

Frederic E. Volz

doi:10.1364/AO.22.003690

Applied Optics
Vol. 22,
Issue 23,
pp. 3690-3700
(1983)
•https://doi.org/10.1364/AO.22.003690

Infrared optical constants of aerosols at some locations

Frederic E. Volz

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Frederic E. Volz, "Infrared optical constants of aerosols at some locations," Appl. Opt. 22, 3690-3700 (1983)

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Abstract

Spectra of absorption indices and data on gross chemical composition for two size classes of water soluble and dust fractions of high-volume aerosol samples are presented for several locations (mainly Bedford, Massachusetts; Meppen in Germany; Riverside and San Nicolas Island in California and some maritime locations). The absorption data were obtained by the KBr-pressed disk method. It has been found that regrinding of the pellets increases the absorption by salt samples considerably.

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COL. 4–9: Conductivity in μMHO (cm mg l)⁻¹;
COL. 5–10: pH value of filter extract (bracketed value at near dryness);
COL. 7+12: Fraction of ethanol solubles (including some nitrate):
COL. 14: Ratio of small particles to total (water solubles only).
COL. 15: Ratio of all dust to all water solubles.

Location	Start of Collection		Small Particles < 1.5 μm					Large Particles > 1.5 μm					< 1.5 μm	DUST	REMARKS
	Start of Collection		Water Solubles				Dust	Water Solubles				Dust	< 1.5 μm	DUST

	DY/MO/YR	m³	C	pH	μg/m³	ES/WS	μg/m³	C	pH	μg/m³	ES/WS	μg/m³	TOTAL W.S.	WS
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Azores, Lajes Airfield	03/07/74	5860	1.5	7.0	4.9	.25		1.15	8.8	35.2	.34	2.1	.15
Bedford MA	11/16/72	7300	0.8	4.4	14.6	.58		1.25	3.9	7.1	.44	4.3	.67
Meppen, Germany	15/10/77	2060	1.43		33.2	.05		.9		21.8	.29	≥72.	.44
	26/03/77	1700	2.8		12.6	.135	5.9	.93		79.4	.27	22.	.30	.30
	02/05/77	3400	1.9		14.1	.092		1.4		4.2	.37	1.2.	.77
	18/05/77	3800	0.65		16.4	.55		.72		3.2	.50	10.7	.84
	10/06/77	1100	1.6		19.0	.085		1.05		46.8	.12	35	.33
	01/06/78	8600	1.52	4.5	9.4	.09	6.5	1.75	(4.5)	4.6	.40	21	.67	.20
Bedford MA	14/11/72	7000	1.3	5.2	6.9	.22		1.33	3.8	2.4	.72	3.7	.74
	16/12/72	7300		4.8	14.6	.58		1.25	3.9	7.1	.44	6.1	.67
	24/01/78	5300	2.5	(1.7)	6.0	.16	6.4	1.29	(7)	5.3	.43	5.2	.53	1.0
Riverside CA	06/08/79	2220	1.44	3.8(2.5)	24.3	.55	≈80	1.2	5.7	33.3	.66	96	.42	.31	Nighttime
	06/08/79	2170	0.64	3.0	30.	.50		1.21	6.6(5)	35.5	.54	152	.46		Daytime
	26/05/78	2400	1.6	(1.5)	62.5	.33	269	included in small particles							Quartz filter
	27/05/78	2400	1.5		59.	.18	273	“	“	“	“			.23	“ “
	20/06/78	1050	1.4	(3)	31.8	.32	119	.82		32.0			.50	.21
	06/07/78	1100	2.12		36.	.56	≈129	.71		18.0	.45	22	.67	.28
San Nicolas Island	23/07/79	4800	1.18	7.4	16.0	.10	7.2	1.34	6.1	150*		6.6	.096	.08	Foggy*
	24/07/80	200	1.64	9.0(8)	550.	.13		1.03	4.3(4.5)	140		300	.80		Fog from sea
	31/07/80	5000	1.18	3.7(3.5)	0.68	<.1		.74	4.6(4.5)	3.25		6.0	.17
Vermont	26/01/82	2100	0.96	4.9(3.5)	6.9	.54	36	1.47	4.5(3)	9.6	.60	14.5	.42	3.7

Sampling area	Weight percent of total

	SO₄	NO₃	NH₄	Organics (benzene extract)
$\begin{array}{l} Downtown Los Angeles 1966) \\ Riverside, Calif . 1968 \end{array}}$	11	12	—	13
Pasadena, Calif. 1969	12	11	0.6	13
San Francisco	10	5	0.7/8	10
U.S. suburban	22	3	—	—
U.S. Nonurban	13	2	—	—
New England19	29	4	5	—
Frankfurt20	28	8.4	15	—
Precipitation global21	29	2.5	1.5	—

COL. 4–9: Conductivity in μMHO (cm mg l)⁻¹;
COL. 5–10: pH value of filter extract (bracketed value at near dryness);
COL. 7+12: Fraction of ethanol solubles (including some nitrate):
COL. 14: Ratio of small particles to total (water solubles only).
COL. 15: Ratio of all dust to all water solubles.

Location	Start of Collection		Small Particles < 1.5 μm					Large Particles > 1.5 μm					< 1.5 μm	DUST	REMARKS
	Start of Collection		Water Solubles				Dust	Water Solubles				Dust	< 1.5 μm	DUST

	DY/MO/YR	m³	C	pH	μg/m³	ES/WS	μg/m³	C	pH	μg/m³	ES/WS	μg/m³	TOTAL W.S.	WS
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Azores, Lajes Airfield	03/07/74	5860	1.5	7.0	4.9	.25		1.15	8.8	35.2	.34	2.1	.15
Bedford MA	11/16/72	7300	0.8	4.4	14.6	.58		1.25	3.9	7.1	.44	4.3	.67
Meppen, Germany	15/10/77	2060	1.43		33.2	.05		.9		21.8	.29	≥72.	.44
	26/03/77	1700	2.8		12.6	.135	5.9	.93		79.4	.27	22.	.30	.30
	02/05/77	3400	1.9		14.1	.092		1.4		4.2	.37	1.2.	.77
	18/05/77	3800	0.65		16.4	.55		.72		3.2	.50	10.7	.84
	10/06/77	1100	1.6		19.0	.085		1.05		46.8	.12	35	.33
	01/06/78	8600	1.52	4.5	9.4	.09	6.5	1.75	(4.5)	4.6	.40	21	.67	.20
Bedford MA	14/11/72	7000	1.3	5.2	6.9	.22		1.33	3.8	2.4	.72	3.7	.74
	16/12/72	7300		4.8	14.6	.58		1.25	3.9	7.1	.44	6.1	.67
	24/01/78	5300	2.5	(1.7)	6.0	.16	6.4	1.29	(7)	5.3	.43	5.2	.53	1.0
Riverside CA	06/08/79	2220	1.44	3.8(2.5)	24.3	.55	≈80	1.2	5.7	33.3	.66	96	.42	.31	Nighttime
	06/08/79	2170	0.64	3.0	30.	.50		1.21	6.6(5)	35.5	.54	152	.46		Daytime
	26/05/78	2400	1.6	(1.5)	62.5	.33	269	included in small particles							Quartz filter
	27/05/78	2400	1.5		59.	.18	273	“	“	“	“			.23	“ “
	20/06/78	1050	1.4	(3)	31.8	.32	119	.82		32.0			.50	.21
	06/07/78	1100	2.12		36.	.56	≈129	.71		18.0	.45	22	.67	.28
San Nicolas Island	23/07/79	4800	1.18	7.4	16.0	.10	7.2	1.34	6.1	150*		6.6	.096	.08	Foggy*
	24/07/80	200	1.64	9.0(8)	550.	.13		1.03	4.3(4.5)	140		300	.80		Fog from sea
	31/07/80	5000	1.18	3.7(3.5)	0.68	<.1		.74	4.6(4.5)	3.25		6.0	.17
Vermont	26/01/82	2100	0.96	4.9(3.5)	6.9	.54	36	1.47	4.5(3)	9.6	.60	14.5	.42	3.7

Sampling area	Weight percent of total

	SO₄	NO₃	NH₄	Organics (benzene extract)
$\begin{array}{l} Downtown Los Angeles 1966) \\ Riverside, Calif . 1968 \end{array}}$	11	12	—	13
Pasadena, Calif. 1969	12	11	0.6	13
San Francisco	10	5	0.7/8	10
U.S. suburban	22	3	—	—
U.S. Nonurban	13	2	—	—
New England19	29	4	5	—
Frankfurt20	28	8.4	15	—
Precipitation global21	29	2.5	1.5	—

Abstract

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Figures (10)

Tables (2)

Equations (2)

Applied Optics