Dataset: AQMET Air quality and meteorological measurements
Deployment: HRS1414

Principal Investigator:

Raymond Najjar (Pennsylvania State University, PSU)

Scientist:

Douglas K. Martins (Pennsylvania State University, PSU)

BCO-DMO Data Manager:

Megan Switzer (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Impacts of atmospheric nitrogen deposition on the biogeochemistry of oligotrophic coastal waters (DANCE)

Version:

Data URL:

https://www.bco-dmo.org/dataset-deployment/733963/data

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Description

AQMET Air quality and meteorological measurements measured measured during DANCE cruise HRS1414 aboard the R/V Hugh R. Sharp from July to August 2014 on the offshore Mid-Atlantic Bight and northern South-Atlantic Bight between latitudes 31.60°N and 38.89°N, and longitudes 71.09°W and 75.16°W.

Air quality and meteorological measurements were collected using commercial instrumentation. The data were averaged to 1 minute and spatial data were linearly interpolated to match the continuous 1 minute data.

Averages and data interpolation was done using MATLAB. Data during known periods of interference such as routine maintenance are reported as NaN. The NOx channel of the Thermo 42C failed during the campaign. NOx can be calculated using the NO measurement from the Thermo 42C and the NO2 measurement from the Aerodyne CAPS.

Complete sampling procedures and methods are found in Martins et al. 2016.

Methods & Sampling

Dataset acquisition description

Data Processing Description

Dataset Processing Description

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1260574	NSF Division of Ocean Sciences

Instruments

Eppley Longwave Radiometer

Supplied Name: Eppley PIR

Supplied Description:

Instrument Type

Generic Name: Eppley Longwave Radiometer

Acronym: Eppley PIR

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0083/

Generic Description:

The Eppley Precision Infrared Radiometer (PIR) pyrgeometer measures longwave (infrared) radiation. It is housed in a weatherproof titanium canister that has been painted with a very flat black paint that absorbs radiation. A small glass dome at the top of the instrument is covered with an 'interference coating' which allows only infrared radiation to come through. Light levels are detected as temperature changes creating voltages in fine wire coil detectors. more from Eppley Labs

Gas Analyzer

Supplied Name: Thermo 49C (ozone); Thermo 48 (CO); Thermo 42C (NO, NOx)

Supplied Description:

Instrument Type

Generic Name: Gas Analyzer

Generic Description:

Gas Analyzers - Instruments for determining the qualitative and quantitative composition of gas mixtures.

Precipitation Gauge

Supplied Name: R.M. Young 50202

Supplied Description:

Instrument Type

Generic Name: Precipitation Gauge

Acronym: PrecipGauge

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/381/

Generic Description:

measures rain or snow precipitation

Precision Spectral Pyranometer

Supplied Name: Eppley PSP

Supplied Description:

Instrument Type

Generic Name: Precision Spectral Pyranometer

Acronym: Eppley PSP

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/112/

Generic Description:

This radiometer measures sun and sky irradiance in the range of wavelengths 0.285 to 2.8 microns, including most of the solar spectrum. The PSP is intended to weight the energy flux in all wavelengths equally. It is a "hemispheric receiver" intended to approximate the
cosine response for oblique rays. The Eppley Precision Spectral Pyranometer (PSP) is primarily used where high accuracy is required or where it is used to calibrate other pyranometers. The PSP outputs a low level voltage ranging from 0 to a maximum of about 12mV depending on sensor calibration and radiation level. An instruction manual provided by Eppley contains the sensor calibration constant and serial number. The Precision Spectral Pyranometer is a World Meteorological Organization First Class Radiometer and comes with a calibration certificate traceable to the World Radiation Reference and a temperature compensation curve. More information is available from Eppley Labs.

Radiometer

Supplied Name: Metcon 2-pi radiometer

Supplied Description:

Instrument Type

Generic Name: Radiometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/122/

Generic Description:

Radiometer is a generic term for a range of instruments used to measure electromagnetic radiation (radiance and irradiance) in the atmosphere or the water column. For example, this instrument category includes free-fall spectral radiometer (SPMR/SMSR System, Satlantic, Inc), profiling or deck cosine PAR units (PUV-500 and 510, Biospherical Instruments, Inc). This is a generic term used when specific type, make and model were not specified.

Spectrophotometer

Supplied Name: Aerodyne CAPS

Supplied Description:

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Index_number	Continuous numeric indicator of the number of observations from the start of the campaign	number	no_bcodmo_term
Seconds_utc	Seconds since the start of the campaign	seconds	time
Fract_day_of_year_utc	Fractional day of year in UTC	days	date
Year_utc	Year of measurement in UTC	year	date
Month_utc	Month of measurement in UTC	month	date
Day_of_month_utc	Day of month of measurement	day	date
Hour_of_day_utc	Hour of day of measurement	hour	time
Minute_of_hour_utc	Minute of hour of measurement	minute	time
Downwelling_shortwave_rad	Downwelling shortwave radiation from top of mast as measured by Eppley PSP	Watts per square meter	radiation_s
Downwelling_longwave_rad	Downwelling longwave radiation from the top of mast as measured by Eppley PIR	Watts per square meter	radiation_l
Accumulated_precip_mm	Accumulated precipitation measured from the start of the campaign measured at the top of the mast as measured by RM Young 50202	millimeters	precip_level
Precipitation_flag	Equal to 0 when it is not raining or an integer when it is raining corresponding to the event number	number	no_bcodmo_term
JNO2	Photolysis rate of NO2 measured at top of mast by Metcon 2-pi radiometer	per second	no_bcodmo_term
NO2	Nitrogen dioxide measured on port side by cavity-attenuated phase shift (CAPS) analyzer (Aerodyne)	ppbv	no_bcodmo_term
O3	Ozone measured on port side by UV absorption (Thermo 49C)	ppbv	no_bcodmo_term
CO	Carbon monoxide measured on port side by IR absorption (Thermo 48)	ppbv	no_bcodmo_term
NO	Nitric oxide measured on port side by chemiluminescence (Thermo 42C)	ppbv	no_bcodmo_term
NOx	Sum of nitric oxide and nitrogen dioxide measured on port side by molybdenum conversion (320 deg C) of NO2 to NO and chemiluminescence	ppbv	no_bcodmo_term
Plume_flag	Value equal to 1 indicates measurements were impacted by ship's plume; clean data have values equal to 0; Plume defined by relative (to ship) wind angles 40-140 deg and 170-190 deg and NO/NO2 ratio > 0.4	number	no_bcodmo_term
lat	Interpolated from the SPS Sharp data; Positive is in the Northern Hemisphere [range -90 to 90]	decimal degrees	lat
lon	Interpolated from the SPS Sharp data; Negative values correspond to the Western Hemisphere [range -180 to 180]	decimal degrees	lat

Database

Contribute Data

Dataset: AQMET Air quality and meteorological measurements
Deployment: HRS1414

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: AQMET Air quality and meteorological measurementsDeployment: HRS1414

Dataset acquisition description

Dataset Processing Description

Dataset: AQMET Air quality and meteorological measurements
Deployment: HRS1414