EUREC4A_ATOMIC_RonBrown_PMEL_Optics_Intensive_v0

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PMEL Atmospheric Chemistry ATOMIC Optics_Intensive 1 minute data

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EUREC4A_ATOMIC_RonBrown_PMEL_Optics_Intensive_v0

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	_NCProperties	String	version=2,netcdf=4.7.4,hdf5=1.10.6
attribute	NC_GLOBAL	cdm_data_type	String	Trajectory
attribute	NC_GLOBAL	cdm_trajectory_variables	String	trajectory_id
attribute	NC_GLOBAL	comment	String	Unless otherwise noted, ambient aerosol particles were sampled at 18 m above sea level through a heated mast. The mast extended 5 m above and forward of the aerosol measurement container. The inlet was a rotating cone-shaped nozzle that was automatically positioned into the relative wind to maintain nominally isokinetic flow and minimize the loss of supermicrometer particles. Air entered the inlet through a 5 cm diameter hole, passed through a 7 degree expansion cone, and then into the 20 cm inner diameter sampling mast. The flow through the mast was 1 m3 min-1. The transmission efficiency of the inlet for particles with aerodynamic diameters less than 6.5 um (the largest size tested) is greater than 95% [Bates et al., 2002]. The bottom 1.5 m of the mast were heated to establish a stable reference relative humidity (RH) for the sample air of in the controlled range of 55 to 60 %RH. Twenty one 1.6 cm inner diameter stainless steel tubes extending into the heated portion of the mast were connected to downstream aerosol instrumentation with either conductive silicon tubing or stainless steel tubing for analysis of organic aerosol. A suite of instruments was used to measure aerosol light scattering and absorption. Two TSI integrating nephelometers (Model 3563) measured integrated total scattering at wavelengths of 450, 550, and 700nm (Anderson et al, 1996; Anderson and Ogren, 1998). Sample flow was taken from the AeroPhysics sampling van inlet. One nephelometer (neph_sub10) always measured aerosols of aerodynamic diameter Dae < 10 micrometers; the second nephelometer (neph_sub1) measured only aerosol of aerodynamic diameter Dae < 1.1 micrometer. When possible, both nephelometers were operated at a sensing volume RH of approximately 60%. This RH was controlled by controlling the temperature of the insulated cabinet that housed the nephelometers. The 10 and 1.1 micrometer cut-offs were made with Berner multi-jet cascade impactors. Two Radiance Research Particle Soot Absorption Photometers were used to measure light absorption by aerosols at 467, 530, and 660nm (Bond et al., 1999; Virkkula et al.,2005) under 'dry' (<25% RH) conditions for sub 10 (psap_sub10) and sub 1 (psap_sub1) micrometer aerosols at the outlet of the respective nephelometers. On the PMEL Data Sever the ~60% RH, neph_sub10 data are in the TOTSCAT file, the ~60% RH, neph_sub1 data are in the SUBSCAT file. The psap_sub10 and psap_sub1 data are in the PSAP file. A separate humidity controlled system measured submicrometric light scattering at two different relative humidities, approximately 25% RH and 85% RH (neph_sub1_lo and neph_sub1_hi) with two TSI integrating 3-wavelength nephelometers operated in series downstream of a Berner impactor. There are no backscattering values available from the _hi or _lo nephelometers as the backscatter shutter mode was set to "total" due to problematic backscatter shutters. The first nephelometer measured scattering of the ~60% conditioned aerosol from the AeroPhysics sampling van inlet at approximately 25% RH after drying of the sample flow using a PermaPure, multiple-tube nafion dryer model PR-94. Downstream of this nephelometer a humidifier was used to add water vapor to the sample flow (6 microporous teflon tubes surrounded by a heatable water-jacket). The sample was conditioned to approximately 80% RH, scattering was measured by the second TSI neph. Humidity was measured by using a chilled mirror dew point hygrometer downstream of the second neph. On the PMEL Data Sever the neph_sub1_lo data are in the SUBSCATloRH file, the neph_sub1_hi data are in the SUBSCAThiRH file. DATA COLLECTION AND PROCESSING Data from both systems were collected and processed at 1 sec resolution but are reported as 60-second averages. Data from each instrument are corrected and adjusted as described below, allowing for derivation of extensive parameters (light scattering and absorption) and intensive parameters (single scatter albedo, Angstrom exponent). Light absorption is box-car averaged by the instrument over a window 10-seconds wide. For all parameters, the bad value code is "NaN" (-9999 in the .acf fles). Intensive parameters are set to NaN when the extensive properties used in their calculation fell below the measurement noise threshold. Both extensive and intensive properties are set to NaN (-9999) during certain events, such as during filter changes, instrument calibration, obvious instrument failure etc. Negative values of absorption might occur during periods of absorption signals near or in the range of the instrument noise, and are partly shifted into the negative range due to scattering correction. STP are p_STP=1013.2 hPa, T_STP=273.2 K. DERIVATION OF MEAN VALUES EXTENSIVE PARAMETERS Data from the TSI integrating nephelometers, Neph sub10 and Neph sub1, and f(RH=low) and f(RH=high) are processed as follows: Span gas (air and CO2) calibrations were made before the field campaign using the standard TSI program. During the campaign zero (particle free air at ambient water vapor conc.) and CO2 span checks were made at three to four day intervals. The resulting zero offset and span factors were applied to the data. The TSI nephelometers measure integrated light scattering into 7-170 degrees. To derive total scatter (0-180 degrees) and hemispheric backscatter (90-180 degrees) angular truncation correction factors were applied as recommended by Anderson and Ogren (1998). Total and hemispheric backscatter were adjusted to STP. (NOTE: There are no backscattering values available from the f(RH=low) and f(RH=high) nephelometers as discussed above.) Data from the Radiance Research Particle Soot Absorption Photometers, PSAPs sub1, sub10, and _lo, are processed as follows: Reported values of light absorption are corrected for spot size, flow rate, artifact response to scattering, and error in the manufacturer's calibration, all given by Bond et al. (1999). Except the spot size, all corrections were made after data collection, i.e. they are not integrated into the PSAP firmware. However, the PSAP's were flow-calibrated prior to the campaign, and a flow correction was applied based on routine flow checks during the cruise. Light absorption is adjusted to STP The f(RH) of scattering data is processed as follows: Reported values of light scattering at low RH and high RH were corrected to STP. the exponent describing the f(RH) dependence of scattering was determined using the scattering values of neph_lo_1min (fRH-optics) and neph_hi_1min (fRH-optics) and applying a linear regression of the relationship log(scat_hi/scat_lo) = -gamma*log((1-fracRH_hi)/(1-fracRH_lo)) based on the Kasten & Hanel formula scat_hi=scat_lo(1-fracRH)^(-gamma) [Wang et. al.,2006] The fRH values given on the data server (SUBFRH) are at the measured high and low RH values. The gamma factor calculated from the equation above is available upon request. INTENSIVE PARAMETERS The Angstrom exponent for scattering at (450,550,700nm), A_Blue = -log(Bs/Gs)/log(450/550) A_Green = -log(Bs/Rs)/log(450/700) A_Red = -log(Gs/Rs)/log(550/700) where Bs, Gs and Rs are light scattering values that apply to 450, 550 and 700 nm, respectively and where these values have been smoothed by averaging over a 30-sec wide window. The Angstrom exponent for absorption at (467,530,660nm), A_Blue = -log(Ba/Ga)/log(467/530) A_Green = -log(Bs/Rs)/log(467/660) A_Red = -log(Gs/Rs)/log(530/660) where Ba, Ga and Ra are light absorption values that apply to 467, 530 and 660 nm, respectively and where these values have been smoothed by averaging over a 30-sec wide window. The single scatter albedo of the sub-micron aerosol was calculated as follows: SSA = Neph1_scat / (Neph1_scat + PSAP1_abs) where light absorption values and scattering have been averaged over 60 seconds. SSA is given for 532nm, i.e. the nephelometer data was wavelength-shifted to match the PSAP wavelength using the nephelometer based Angstrom exponent. The sub 1 micron and sub 10 micron Scattering Angstrom exponents can be found on the PMEL Data Server in the SUBSCATANG and TOTSCATANG files. The sub 1 micron and sub 10 micron Absorption Angstrom exponents can be found in the SUBABSANG and TOTABSANG files. The sub 1 micron and sub 10 micron single scatter albedo values can be found in the SUBSSA and TOTSSA files. REFERENCES Anderson, T.L., D.S. Covert, S.F. Marshall, M. L. Laucks, R.J. Charlson, A.P. Waggoner, J.A. Ogren, R. Caldow, R. Holm, F. Quant, G. Sem, A. Wiedensohler, N.A. Ahlquist, and T.S. Bates, "Performance characteristics of a high-sensitivity, three-wavelength, total scatter/backscatter nephelometer", J. Atmos. Oceanic Technol., 13, 967-986, 1996. Anderson, T.L., and J.A. Ogren, "Determining aerosol radiative properties using the TSI 3563 integrating nephelometer", Aerosol Sci. Technol., 29, 57-69, 1998. Bond, T.C., T.L. Anderson, and D. Campbell, "Calibration and intercomparison of filter-based measurements of visible light absorption by aerosols", Aerosol Sci. and Tech., 30, 582-600, 1999. A. Virkkula, N. C. Ahquist, D. S. Covert, P. J. Sheridan, W. P. Arnott, J. A Ogren,"A three-wavelength optical extinction cell for measuring aerosol light extinction and its application to determining absorption coefficient", Aero. Sci. and Tech., 39,52-67, 2005 A. Virkkula, N. C. Ahquist, D. S. Covert, W. P. Arnott, P. J. Sheridan, P. K. Quinn,D. J. Coffman, "Modification, calibration and a field test of an instrument for measuring light absorption by particles", Aero. Sci. and Tech., 39, 68-83, 2005 Wang et. al, Aerosol optical properties over the Northwestern Atlantic Ocean during NEAQS-ITCT 2004, and the influence of particulate matter on aerosol hygroscopicity, submitted to J. Geo. Phys. Res., 2006
attribute	NC_GLOBAL	contributor_name	String	Coffman, Derek;Johnson, James;Quinn, Patricia;Bates, Tim;Upchurch, Lucia
attribute	NC_GLOBAL	Conventions	String	CF-1.6, COARDS, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	james.e.johnson at noaa.gov
attribute	NC_GLOBAL	creator_name	String	Johnson, James
attribute	NC_GLOBAL	creator_url	String	https://saga.pmel.noaa.gov
attribute	NC_GLOBAL	date_created	String	2020-11-30T17:23:13Z
attribute	NC_GLOBAL	Easternmost_Easting	double	-50.9246
attribute	NC_GLOBAL	featureType	String	Trajectory
attribute	NC_GLOBAL	geospatial_lat_max	double	15.8652
attribute	NC_GLOBAL	geospatial_lat_min	double	12.7865
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-50.9246
attribute	NC_GLOBAL	geospatial_lon_min	double	-59.6588
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	history	String	file created by NOAA/PMEL/ACG
attribute	NC_GLOBAL	infoUrl	String	https://saga.pmel.noaa.gov
attribute	NC_GLOBAL	institution	String	NOAA PMEL Atmospheric Chemistry
attribute	NC_GLOBAL	keywords	String	1-micron, absorb_angstrom_467_530_sub1, absorb_angstrom_467_530_sub10, absorb_angstrom_467_660_sub1, absorb_angstrom_467_660_sub10, absorb_angstrom_530_660_sub1, absorb_angstrom_530_660_sub10, absorption, aeorosals, aerosol, aerosols, air, albedo, ambient, angstrom, angstrom_exponent_of_ambient_aerosol_in_air, atmosphere, atmospheric, atomic, chemistry, data, depth, due, earth, Earth Science > Atmosphere > Aerosols > Aerosol Optical Depth/Thickness > Angstrom Exponent, Earth Science > Atmosphere > Aerosols > Aerosol Particle Properties, Earth Science > Atmosphere > Aerosols > Particulate Matter, environmental, exponent, identifier, intensive, laboratory, latitude, light, longitude, marine, matter, micron, minute, noaa, optical, optical properties, optics, pacific, particle, particles, particulate, pmel, properties, range, scatter, scatter_angstrom_450_550_sub1, scatter_angstrom_450_550_sub10, scatter_angstrom_450_700_sub1, scatter_angstrom_450_700_sub10, scatter_angstrom_550_700_sub1, scatter_angstrom_550_700_sub10, scattering, science, single, single_scattering_albedo_in_air_due_to_ambient_aerosol_particles, ssa_467_sub1, ssa_467_sub10, ssa_530_sub1, ssa_530_sub10, ssa_660_sub1, ssa_660_sub10, sub, thickness, time, trajectory, trajectory_id, wavelength
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute	NC_GLOBAL	Northernmost_Northing	double	15.8652
attribute	NC_GLOBAL	platform	String	RHBrown
attribute	NC_GLOBAL	product_version	String	0
attribute	NC_GLOBAL	project	String	ATOMIC
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	Southernmost_Northing	double	12.7865
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	trajectory_id
attribute	NC_GLOBAL	summary	String	ATOMIC (Atlantic Tradewind Ocean Atmosphere Mesoscale Interaction Campaign) 2020 Field campaign: Surface meteorological and ship navigation collected from the RV Ronald H. Brown by the National Oceanic and Atmospheric Administration (NOAA) Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry Group in the tropical North Atlantic ocean from 2020-01-09 to 2020-02-13
attribute	NC_GLOBAL	time_coverage_end	String	2020-02-11T23:59:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2020-01-07T18:00:00Z
attribute	NC_GLOBAL	title	String	PMEL Atmospheric Chemistry ATOMIC Optics_Intensive 1 minute data
attribute	NC_GLOBAL	Westernmost_Easting	double	-59.6588
attribute	NC_GLOBAL	Westernnmost_Easting	double	-59.6588
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.57842E9, 1.58146554E9
attribute	time	axis	String	T
attribute	time	calendar	String	gregorian
attribute	time	colorBarMaximum	double	1.582E9
attribute	time	colorBarMinimum	double	1.578E9
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	trajectory_id		String
attribute	trajectory_id	cf_role	String	trajectory_id
attribute	trajectory_id	ioos_category	String	Identifier
attribute	trajectory_id	long_name	String	trajectory id
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	-1.0E34
attribute	latitude	actual_range	double	12.7865, 15.8652
attribute	latitude	axis	String	Y
attribute	latitude	colorBarMaximum	double	90.0
attribute	latitude	colorBarMinimum	double	-90.0
attribute	latitude	comment	String	In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record.
attribute	latitude	epic_code	String	500
attribute	latitude	instrument	String	GPS
attribute	latitude	ioos_category	String	Location
attribute	latitude	long_name	String	Latitude
attribute	latitude	standard_name	String	latitude
attribute	latitude	units	String	degrees_north
attribute	latitude	valid_max	double	90.0
attribute	latitude	valid_min	double	-90.0
variable	longitude		double
attribute	longitude	_CoordinateAxisType	String	Lon
attribute	longitude	_FillValue	double	-1.0E34
attribute	longitude	actual_range	double	-59.6588, -50.9246
attribute	longitude	axis	String	X
attribute	longitude	colorBarMaximum	double	180.0
attribute	longitude	colorBarMinimum	double	-180.0
attribute	longitude	comment	String	In the one minute files the position is treated somewhat differently from all the other data. The position given is the ship's position at the start of the one minute 'averaging' period. All other data are a true average. The PMEL GPS was the primary source. The Ship's GPS was used when there were missing data in the PMEL record.
attribute	longitude	epic_code	String	502
attribute	longitude	instrument	String	GPS
attribute	longitude	ioos_category	String	Location
attribute	longitude	long_name	String	Longitude
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
attribute	longitude	valid_max	double	180.0
attribute	longitude	valid_min	double	-180.0
variable	scatter_angstrom_450_550_sub1		double
attribute	scatter_angstrom_450_550_sub1	_FillValue	double	-1.0E34
attribute	scatter_angstrom_450_550_sub1	actual_range	double	-14.3041, 10.3727
attribute	scatter_angstrom_450_550_sub1	colorBarMaximum	double	15.0
attribute	scatter_angstrom_450_550_sub1	colorBarMinimum	double	-15.0
attribute	scatter_angstrom_450_550_sub1	epic_code	String	2003
attribute	scatter_angstrom_450_550_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005)
attribute	scatter_angstrom_450_550_sub1	ioos_category	String	Optical Properties
attribute	scatter_angstrom_450_550_sub1	long_name	String	Light Scattering Angstrom exponent by sub 1-micron Aerosols at wavelength range 450_550_nm
attribute	scatter_angstrom_450_550_sub1	missing_value	double	-999.0
attribute	scatter_angstrom_450_550_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_450_550_sub1	units	String	1
variable	scatter_angstrom_450_700_sub1		double
attribute	scatter_angstrom_450_700_sub1	_FillValue	double	-1.0E34
attribute	scatter_angstrom_450_700_sub1	actual_range	double	-5.43579, 10.7311
attribute	scatter_angstrom_450_700_sub1	colorBarMaximum	double	15.0
attribute	scatter_angstrom_450_700_sub1	colorBarMinimum	double	-10.0
attribute	scatter_angstrom_450_700_sub1	epic_code	String	2004
attribute	scatter_angstrom_450_700_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005)
attribute	scatter_angstrom_450_700_sub1	ioos_category	String	Optical Properties
attribute	scatter_angstrom_450_700_sub1	long_name	String	Light Scattering Angstrom exponent by sub 1-micron Aerosols at wavelength range 450_700_nm
attribute	scatter_angstrom_450_700_sub1	missing_value	double	-999.0
attribute	scatter_angstrom_450_700_sub1	source	String	surface observation
attribute	scatter_angstrom_450_700_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_450_700_sub1	units	String	1
variable	scatter_angstrom_550_700_sub1		double
attribute	scatter_angstrom_550_700_sub1	_FillValue	double	-1.0E34
attribute	scatter_angstrom_550_700_sub1	actual_range	double	-5.72508, 19.568
attribute	scatter_angstrom_550_700_sub1	colorBarMaximum	double	30.0
attribute	scatter_angstrom_550_700_sub1	colorBarMinimum	double	-10.0
attribute	scatter_angstrom_550_700_sub1	epic_code	String	2005
attribute	scatter_angstrom_550_700_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005)
attribute	scatter_angstrom_550_700_sub1	ioos_category	String	Optical Properties
attribute	scatter_angstrom_550_700_sub1	long_name	String	Light Scattering Angstrom exponent by sub 1-micron Aerosols at wavelength range 550_700_nm
attribute	scatter_angstrom_550_700_sub1	missing_value	double	-999.0
attribute	scatter_angstrom_550_700_sub1	source	String	surface observation
attribute	scatter_angstrom_550_700_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_550_700_sub1	units	String	1
variable	scatter_angstrom_450_550_sub10		double
attribute	scatter_angstrom_450_550_sub10	_FillValue	double	-1.0E34
attribute	scatter_angstrom_450_550_sub10	actual_range	double	-0.83005, 2.85723
attribute	scatter_angstrom_450_550_sub10	colorBarMaximum	double	3.0
attribute	scatter_angstrom_450_550_sub10	colorBarMinimum	double	-1.0
attribute	scatter_angstrom_450_550_sub10	epic_code	String	2003
attribute	scatter_angstrom_450_550_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050)
attribute	scatter_angstrom_450_550_sub10	ioos_category	String	Optical Properties
attribute	scatter_angstrom_450_550_sub10	long_name	String	Light Scattering Angstrom exponent by sub 10 micron Aerosols at wavelength range 450_550_nm
attribute	scatter_angstrom_450_550_sub10	missing_value	double	-999.0
attribute	scatter_angstrom_450_550_sub10	source	String	surface observation
attribute	scatter_angstrom_450_550_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_450_550_sub10	units	String	1
variable	scatter_angstrom_450_700_sub10		double
attribute	scatter_angstrom_450_700_sub10	_FillValue	double	-1.0E34
attribute	scatter_angstrom_450_700_sub10	actual_range	double	-0.45473, 2.56663
attribute	scatter_angstrom_450_700_sub10	colorBarMaximum	double	3.0
attribute	scatter_angstrom_450_700_sub10	colorBarMinimum	double	-1.0
attribute	scatter_angstrom_450_700_sub10	epic_code	String	2004
attribute	scatter_angstrom_450_700_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050)
attribute	scatter_angstrom_450_700_sub10	ioos_category	String	Optical Properties
attribute	scatter_angstrom_450_700_sub10	long_name	String	Light Scattering Angstrom exponent by sub 10 micron Aerosols at wavelength range 450_700_nm
attribute	scatter_angstrom_450_700_sub10	missing_value	double	-999.0
attribute	scatter_angstrom_450_700_sub10	source	String	surface observation
attribute	scatter_angstrom_450_700_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_450_700_sub10	units	String	1
variable	scatter_angstrom_550_700_sub10		double
attribute	scatter_angstrom_550_700_sub10	_FillValue	double	-1.0E34
attribute	scatter_angstrom_550_700_sub10	actual_range	double	-0.997104, 2.96678
attribute	scatter_angstrom_550_700_sub10	colorBarMaximum	double	4.0
attribute	scatter_angstrom_550_700_sub10	colorBarMinimum	double	-2.0
attribute	scatter_angstrom_550_700_sub10	epic_code	String	2005
attribute	scatter_angstrom_550_700_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050)
attribute	scatter_angstrom_550_700_sub10	ioos_category	String	Optical Properties
attribute	scatter_angstrom_550_700_sub10	long_name	String	Light Scattering Angstrom exponent by sub 10 micron Aerosols at wavelength range 550_700_nm
attribute	scatter_angstrom_550_700_sub10	missing_value	double	-999.0
attribute	scatter_angstrom_550_700_sub10	source	String	surface observation
attribute	scatter_angstrom_550_700_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	scatter_angstrom_550_700_sub10	units	String	1
variable	absorb_angstrom_467_530_sub1		double
attribute	absorb_angstrom_467_530_sub1	_FillValue	double	-1.0E34
attribute	absorb_angstrom_467_530_sub1	actual_range	double	-5.95202, 3.37656
attribute	absorb_angstrom_467_530_sub1	colorBarMaximum	double	4.0
attribute	absorb_angstrom_467_530_sub1	colorBarMinimum	double	-8.0
attribute	absorb_angstrom_467_530_sub1	epic_code	String	2006
attribute	absorb_angstrom_467_530_sub1	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_467_530_sub1	ioos_category	String	Optical Properties
attribute	absorb_angstrom_467_530_sub1	long_name	String	Light Absorption Angstrom exponent by sub 1 micron Aerosols at wavelength range 467_530_nm
attribute	absorb_angstrom_467_530_sub1	missing_value	double	-999.0
attribute	absorb_angstrom_467_530_sub1	source	String	surface observation
attribute	absorb_angstrom_467_530_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_467_530_sub1	units	String	1
variable	absorb_angstrom_467_660_sub1		double
attribute	absorb_angstrom_467_660_sub1	_FillValue	double	-1.0E34
attribute	absorb_angstrom_467_660_sub1	actual_range	double	-0.0667039, 1.51619
attribute	absorb_angstrom_467_660_sub1	colorBarMaximum	double	2.0
attribute	absorb_angstrom_467_660_sub1	colorBarMinimum	double	-0.5
attribute	absorb_angstrom_467_660_sub1	epic_code	String	2007
attribute	absorb_angstrom_467_660_sub1	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_467_660_sub1	ioos_category	String	Optical Properties
attribute	absorb_angstrom_467_660_sub1	long_name	String	Light Absorption Angstrom exponent by sub 1 micron Aerosols at wavelength range 467_660_nm
attribute	absorb_angstrom_467_660_sub1	missing_value	double	-999.0
attribute	absorb_angstrom_467_660_sub1	source	String	surface observation
attribute	absorb_angstrom_467_660_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_467_660_sub1	units	String	1
variable	absorb_angstrom_530_660_sub1		double
attribute	absorb_angstrom_530_660_sub1	_FillValue	double	-1.0E34
attribute	absorb_angstrom_530_660_sub1	actual_range	double	-0.604194, 1.49389
attribute	absorb_angstrom_530_660_sub1	colorBarMaximum	double	2.0
attribute	absorb_angstrom_530_660_sub1	colorBarMinimum	double	-1.0
attribute	absorb_angstrom_530_660_sub1	epic_code	String	2008
attribute	absorb_angstrom_530_660_sub1	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_530_660_sub1	ioos_category	String	Optical Properties
attribute	absorb_angstrom_530_660_sub1	long_name	String	Light Absorption Angstrom exponent by sub 1 micron Aerosols at wavelength range 530_660_nm
attribute	absorb_angstrom_530_660_sub1	missing_value	double	-999.0
attribute	absorb_angstrom_530_660_sub1	source	String	surface observation
attribute	absorb_angstrom_530_660_sub1	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_530_660_sub1	units	String	1
variable	absorb_angstrom_467_530_sub10		double
attribute	absorb_angstrom_467_530_sub10	_FillValue	double	-1.0E34
attribute	absorb_angstrom_467_530_sub10	actual_range	double	-2.30035, 20.1072
attribute	absorb_angstrom_467_530_sub10	colorBarMaximum	double	25.0
attribute	absorb_angstrom_467_530_sub10	colorBarMinimum	double	-5.0
attribute	absorb_angstrom_467_530_sub10	epic_code	String	2000
attribute	absorb_angstrom_467_530_sub10	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_467_530_sub10	ioos_category	String	Optical Properties
attribute	absorb_angstrom_467_530_sub10	long_name	String	Light Absorption Angstrom exponent by sub 10 micron Aerosols at wavelength range 467_530_nm
attribute	absorb_angstrom_467_530_sub10	missing_value	double	-999.0
attribute	absorb_angstrom_467_530_sub10	source	String	surface observation
attribute	absorb_angstrom_467_530_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_467_530_sub10	units	String	1
variable	absorb_angstrom_467_660_sub10		double
attribute	absorb_angstrom_467_660_sub10	_FillValue	double	-1.0E34
attribute	absorb_angstrom_467_660_sub10	actual_range	double	-2.01433, 5.11131
attribute	absorb_angstrom_467_660_sub10	colorBarMaximum	double	6.0
attribute	absorb_angstrom_467_660_sub10	colorBarMinimum	double	-4.0
attribute	absorb_angstrom_467_660_sub10	epic_code	String	2001
attribute	absorb_angstrom_467_660_sub10	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_467_660_sub10	ioos_category	String	Optical Properties
attribute	absorb_angstrom_467_660_sub10	long_name	String	Light Absorption Angstrom exponent by sub 10 micron Aerosols at wavelength range 467_660_nm
attribute	absorb_angstrom_467_660_sub10	missing_value	double	-999.0
attribute	absorb_angstrom_467_660_sub10	source	String	surface observation
attribute	absorb_angstrom_467_660_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_467_660_sub10	units	String	1
variable	absorb_angstrom_530_660_sub10		double
attribute	absorb_angstrom_530_660_sub10	_FillValue	double	-1.0E34
attribute	absorb_angstrom_530_660_sub10	actual_range	double	-9.70655, 5.63122
attribute	absorb_angstrom_530_660_sub10	colorBarMaximum	double	10.0
attribute	absorb_angstrom_530_660_sub10	colorBarMinimum	double	-10.0
attribute	absorb_angstrom_530_660_sub10	epic_code	String	2002
attribute	absorb_angstrom_530_660_sub10	instrument	String	Radiance Research PSAP (sn: )
attribute	absorb_angstrom_530_660_sub10	ioos_category	String	Optical Properties
attribute	absorb_angstrom_530_660_sub10	long_name	String	Light Absorption Angstrom exponent by sub 10 micron Aerosols at wavelength range 530_660_nm
attribute	absorb_angstrom_530_660_sub10	missing_value	double	-999.0
attribute	absorb_angstrom_530_660_sub10	source	String	surface observation
attribute	absorb_angstrom_530_660_sub10	standard_name	String	angstrom_exponent_of_ambient_aerosol_in_air
attribute	absorb_angstrom_530_660_sub10	units	String	1
variable	ssa_467_sub1		double
attribute	ssa_467_sub1	_FillValue	double	-1.0E34
attribute	ssa_467_sub1	actual_range	double	0.00355216, 0.999976
attribute	ssa_467_sub1	colorBarMaximum	double	1.2000000000000002
attribute	ssa_467_sub1	colorBarMinimum	double	0.0
attribute	ssa_467_sub1	epic_code	String	2006
attribute	ssa_467_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005); Radiance Research PSAP (sn: )
attribute	ssa_467_sub1	ioos_category	String	Optical Properties
attribute	ssa_467_sub1	long_name	String	Single Scatter Albedo by sub 1 micron aeorosals at 467 nm
attribute	ssa_467_sub1	missing_value	double	-999.0
attribute	ssa_467_sub1	source	String	surface observation
attribute	ssa_467_sub1	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_467_sub1	units	String	1
attribute	ssa_467_sub1	valid_max	double	1.0
attribute	ssa_467_sub1	valid_min	double	0.0
variable	ssa_530_sub1		double
attribute	ssa_530_sub1	_FillValue	double	-1.0E34
attribute	ssa_530_sub1	actual_range	double	0.00604464, 0.999997
attribute	ssa_530_sub1	colorBarMaximum	double	1.2000000000000002
attribute	ssa_530_sub1	colorBarMinimum	double	0.0
attribute	ssa_530_sub1	epic_code	String	2007
attribute	ssa_530_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005); Radiance Research PSAP (sn: )
attribute	ssa_530_sub1	ioos_category	String	Optical Properties
attribute	ssa_530_sub1	long_name	String	Single Scatter Albedo by sub 1 micron aeorosals at 530 nm
attribute	ssa_530_sub1	missing_value	double	-999.0
attribute	ssa_530_sub1	source	String	surface observation
attribute	ssa_530_sub1	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_530_sub1	units	String	1
attribute	ssa_530_sub1	valid_max	double	1.0
attribute	ssa_530_sub1	valid_min	double	0.0
variable	ssa_660_sub1		double
attribute	ssa_660_sub1	_FillValue	double	-1.0E34
attribute	ssa_660_sub1	actual_range	double	2.96363E-4, 0.999996
attribute	ssa_660_sub1	colorBarMaximum	double	1.2000000000000002
attribute	ssa_660_sub1	colorBarMinimum	double	0.0
attribute	ssa_660_sub1	epic_code	String	2008
attribute	ssa_660_sub1	instrument	String	TSI 3563 Integrating Nephelometer (sn: 1005); Radiance Research PSAP (sn: )
attribute	ssa_660_sub1	ioos_category	String	Optical Properties
attribute	ssa_660_sub1	long_name	String	Single Scatter Albedo by sub 1 micron aeorosals at 660 nm
attribute	ssa_660_sub1	missing_value	double	-999.0
attribute	ssa_660_sub1	source	String	surface observation
attribute	ssa_660_sub1	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_660_sub1	units	String	1
attribute	ssa_660_sub1	valid_max	double	1.0
attribute	ssa_660_sub1	valid_min	double	0.0
variable	ssa_467_sub10		double
attribute	ssa_467_sub10	_FillValue	double	-1.0E34
attribute	ssa_467_sub10	actual_range	double	0.205435, 1.0
attribute	ssa_467_sub10	colorBarMaximum	double	1.2000000000000002
attribute	ssa_467_sub10	colorBarMinimum	double	0.0
attribute	ssa_467_sub10	epic_code	String	2006
attribute	ssa_467_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050); Radiance Research PSAP (sn: )
attribute	ssa_467_sub10	ioos_category	String	Optical Properties
attribute	ssa_467_sub10	long_name	String	Single Scatter Albedo by sub 10 micron aeorosals at 467 nm
attribute	ssa_467_sub10	missing_value	double	-999.0
attribute	ssa_467_sub10	source	String	surface observation
attribute	ssa_467_sub10	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_467_sub10	units	String	1
attribute	ssa_467_sub10	valid_max	double	1.0
attribute	ssa_467_sub10	valid_min	double	0.0
variable	ssa_530_sub10		double
attribute	ssa_530_sub10	_FillValue	double	-1.0E34
attribute	ssa_530_sub10	actual_range	double	0.205913, 1.0
attribute	ssa_530_sub10	colorBarMaximum	double	1.2000000000000002
attribute	ssa_530_sub10	colorBarMinimum	double	0.0
attribute	ssa_530_sub10	epic_code	String	2007
attribute	ssa_530_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050); Radiance Research PSAP (sn: )
attribute	ssa_530_sub10	ioos_category	String	Optical Properties
attribute	ssa_530_sub10	long_name	String	Single Scatter Albedo by sub 10 micron aeorosals at 530 nm
attribute	ssa_530_sub10	missing_value	double	-999.0
attribute	ssa_530_sub10	source	String	surface observation
attribute	ssa_530_sub10	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_530_sub10	units	String	1
attribute	ssa_530_sub10	valid_max	double	1.0
attribute	ssa_530_sub10	valid_min	double	0.0
variable	ssa_660_sub10		double
attribute	ssa_660_sub10	_FillValue	double	-1.0E34
attribute	ssa_660_sub10	actual_range	double	0.204085, 0.999999
attribute	ssa_660_sub10	colorBarMaximum	double	1.2000000000000002
attribute	ssa_660_sub10	colorBarMinimum	double	0.0
attribute	ssa_660_sub10	epic_code	String	2008
attribute	ssa_660_sub10	instrument	String	TSI 3563 Integrating Nephelometer (sn: 70526050); Radiance Research PSAP (sn: )
attribute	ssa_660_sub10	ioos_category	String	Optical Properties
attribute	ssa_660_sub10	long_name	String	Single Scatter Albedo by sub 10 micron aeorosals at 660 nm
attribute	ssa_660_sub10	missing_value	double	-999.0
attribute	ssa_660_sub10	source	String	surface observation
attribute	ssa_660_sub10	standard_name	String	single_scattering_albedo_in_air_due_to_ambient_aerosol_particles
attribute	ssa_660_sub10	units	String	1
attribute	ssa_660_sub10	valid_max	double	1.0
attribute	ssa_660_sub10	valid_min	double	0.0

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