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Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | PMEL Atmospheric Chemistry NEAQAS2004 Experiment irregular 3 data
|
| Institution: | PMEL Atmospheric Chemistry (Dataset ID: IrregularTime3_6933_c433_b0d6) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Make a graph
|
Attributes {
s {
traj {
Float64 actual_range 1.0, 1.0;
String axis "E";
String long_name "Traj";
String point_spacing "even";
}
id {
String cf_role "trajectory_id";
String long_name "trajectory id";
}
time {
String _CoordinateAxisType "Time";
Float64 actual_range 1.089121227e+9, 1.0921707810000002e+9;
String axis "T";
String ioos_category "Time";
String long_name "Time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
}
longitude {
String _CoordinateAxisType "Lon";
Float32 _FillValue -1.0e+34;
Float32 actual_range -71.04792, -67.42549;
String axis "X";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
Int32 epic_code 502;
String FORTRAN_format "f10.4";
Float32 gap_value -999.0;
String generic_name "lon";
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "GPS";
String ioos_category "Location";
String long_name "Longitude";
Float32 max_value 360.0;
Float32 min_value -180.0;
Float32 missing_value -1.0e+34;
String name "LON";
String note_01 "UNCERTAINTY=+/-0.001 deg";
String plot_lab "LONGT";
String standard_name "longitude";
String units "degrees_east";
}
lon360 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 288.9521, 292.5745;
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String long_name "longitude 360";
Float32 missing_value -1.0e+34;
String standard_name "longitude";
String units "degrees_east";
}
latitude {
String _CoordinateAxisType "Lat";
Float32 _FillValue -1.0e+34;
Float32 actual_range 42.23552, 44.46892;
String axis "Y";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
Int32 epic_code 500;
String FORTRAN_format "f10.4";
Float32 gap_value -999.0;
String generic_name "lat";
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "GPS";
String ioos_category "Location";
String long_name "Latitude";
Float32 max_value 90.0;
Float32 min_value -90.0;
Float32 missing_value -1.0e+34;
String name "LAT";
String note_01 "UNCERTAINTY=+/-0.001 deg";
String plot_lab "LAT";
String standard_name "latitude";
String units "degrees_north";
}
DUR_628 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 7.0, 7.0;
Int32 epic_code 628;
Float32 gap_value -99.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "*";
String long_name "Sample Duration";
Float32 max_value 59.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "DUR";
String plot_lab "Duration";
String units "min";
}
TIM_627 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 188.5698, 223.8655;
Int32 epic_code 627;
Float32 gap_value -999.0;
String generic_name "time";
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "*";
String long_name "Julian Days";
Float32 max_value 365.9999;
Float32 min_value 1.0;
Float32 missing_value -1.0e+34;
String name "TIM";
String plot_lab "DayOfYear";
}
AOD1_1881 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 0.1146435, 1.299092;
Int32 epic_code 1881;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer, SN 4080";
String long_name "Aerosol Optical Depth Ch-1";
Float32 max_value 5.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AOD1";
String note_01 "UNCERTAINTY=+/-0.015 AOD";
String plot_lab "AOD_380";
}
AOD2_1882 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 0.081097, 1.160749;
Int32 epic_code 1882;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer, SN 4080";
String long_name "Aerosol Optical Depth Ch-2";
Float32 max_value 5.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AOD2";
String note_01 "UNCERTAINTY=+/-0.015 AOD";
String plot_lab "AOD_440";
}
AOD3_1883 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 0.06943016, 1.058329;
Int32 epic_code 1883;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer, SN 4080";
String long_name "Aerosol Optical Depth Ch-3";
Float32 max_value 5.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AOD3";
String note_01 "UNCERTAINTY=+/-0.015 AOD";
String plot_lab "AOD_500";
}
AOD4_1884 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 0.04812541, 0.8202162;
Int32 epic_code 1884;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer, SN 4080";
String long_name "Aerosol Optical Depth Ch-4";
Float32 max_value 5.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AOD4";
String note_01 "UNCERTAINTY=+/-0.015 AOD";
String plot_lab "AOD_675";
}
AOD5_1885 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 0.03120971, 0.6754694;
Int32 epic_code 1885;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer, SN 4080";
String long_name "Aerosol Optical Depth Ch-5";
Float32 max_value 5.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AOD5";
String plot_lab "AOD_870";
}
AODMZA_1880 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 20.55, 79.19;
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
Int32 epic_code 1880;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer and GPS";
String long_name "AOD measurement zenith angle";
Float32 max_value 90.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AODMZA";
String note_01 "UNCERTAINTY=+/-1 Deg";
String plot_lab "SolarZenithAng";
String units "degrees";
}
AODAMS_1879 {
Float32 _FillValue -1.0e+34;
Float32 actual_range 1.067172, 5.1887;
Int32 epic_code 1879;
Float32 gap_value -999.0;
String history "From NEAQS2004_AOD4080_v0_copy";
String instr_id "Microtops sunphotometer and GPS";
String long_name "AOD measurement airmass";
Float32 max_value 90.0;
Float32 min_value 0.0;
Float32 missing_value -1.0e+34;
String name "AODAMS";
String note_01 "UNCERTAINTY=+/-0.01 AirMass";
String plot_lab "AirMass";
String units "atmosphere";
}
}
NC_GLOBAL {
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "traj, id";
String Conventions "CF-1.6, COARDS, ACDD-1.3";
String creation_date "14:26 15-MAR-05";
String creator_email "pmel.info@noaa.gov";
String creator_name "PMEL Atmospheric Chemistry";
String creator_url "https://www.pmel.noaa.gov/";
Float64 Easternmost_Easting -67.42549;
String featureType "Trajectory";
Float64 geospatial_lat_max 44.46892;
Float64 geospatial_lat_min 42.23552;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -67.42549;
Float64 geospatial_lon_min -71.04792;
String geospatial_lon_units "degrees_east";
String history
"FERRET V7.01 (beta/debug) 19-Aug-16
2024-11-21T21:53:16Z (local files)
2024-11-21T21:53:16Z https://data.pmel.noaa.gov/pmel/erddap/tabledap/IrregularTime3_6933_c433_b0d6.html";
String infoUrl "http://saga.pmel.noaa.gov/";
String institution "PMEL Atmospheric Chemistry";
String keywords "aerosol, air, airmass, angle, aod, AOD1_1881, AOD2_1882, AOD3_1883, AOD4_1884, AOD5_1885, AODAMS_1879, AODMZA_1880, atmospheric, ch-1, ch-2, ch-3, ch-4, ch-5, chemistry, data, days, depth, DUR_628, duration, england, environmental, irregular, julian, laboratory, latitude, lon360, longitude, marine, measurement, new, noaa, optical, pacific, pmel, quality, sample, study, TIM_627, time, traj, trajectory, zenith";
String license
"Data Licenses / Data Usage Restrictions
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.
Unless otherwise noted, data served through this ERDDAP server are
not quality controlled. Users may need to do quality control when using
these data. These data are made available at the users own risk.";
Float64 Northernmost_Northing 44.46892;
String REMARK_01 "Data Source Description= Aerosol Optical Depth Data from R/V RONALD H. BROWN du";
String REMARK_02 "Time Description= irregular time interval";
String REMARK_03 "Other= All data are from 7 second averages, data start times are irregular with";
String REMARK_04 "Version 0= Initial version, no comments";
String REMARK_05 "Three 5-channel handheld Microtops sunphotometer (Solar Light Co.) were used.";
String REMARK_06 "Two units (SN 4080 and 4080) have wavelengths of 380, 440, 500, 675, and 870 nm)";
String REMARK_07 "The third unit (SN 5355) has wavelengths of 340, 380, 500, 675, and 870 nm).";
String REMARK_08 "The full angular field of view for the Microtops is 2.5 deg. The instruments ha";
String REMARK_09 "pressure and temperature sensors and were operated with a GPS connection to obta";
String REMARK_10 "and time of the measurements. Raw signal voltages were converted to aerosol opti";
String REMARK_11 "correcting for Rayleigh scattering [Penndorf, 1957], ozone optical depth, and an";
String REMARK_12 "accounts for the Earth's curvature [Kasten and Young, 1989]. Ozone column amount";
String REMARK_13 "the ozone optical depth were obtained from TOMS data as a daily average througho";
String REMARK_14 "the latitude and longitude of Boston. Units 4080 and 5355 were calibrated at MLO";
String REMARK_15 "month prior to the start of the cruise.";
String REMARK_16 "Unit 4080 was calibrated at the factory in January, 2004.";
String REMARK_17 "Calibrations were done using a Langley plot approach [Shaw, 1983]. Measurements";
String REMARK_18 "followed the protocol of Knobelspiesse et al. [2003]. The scan length was set to";
String REMARK_19 "20 measurements are obtained during each \"shot\". The largest voltage of the 20 m";
String REMARK_20 "recorded which corresponds to the lowest AOD. This approach helps to eliminate e";
String REMARK_21 "measurements that result from pointing errors on a moving ship. After the experi";
String REMARK_22 "processing algorithm was applied. This algoritm calculates a coefficient of vari";
String REMARK_23 "measurement equal to the sample standard deviation divided by the sample mean.";
String REMARK_24 "If the CoV > than 0.05, the highest AOD is removed and CoV is recalculated. This";
String REMARK_25 "repeated until all points \"pass\". All units were compared at each common wavleng";
String REMARK_26 "the slope was 0.98 and r^2 was 0.99. For 500 nm, the slope was 0.98 and r^2 was";
String REMARK_27 "the slope was 0.95 to 0.98 and the r^2 was 0.96. For 870, the slope was 0.92 and";
String REMARK_28 "0.90. For 440 nm the slope was 0.99 and r^2 was 0.99. The uncertainty of the Mic";
String REMARK_29 "esimated to be +/- 0.015 AOD.";
String REMARK_30 " Kasten, F. and A. T. Young, Revised optical air mass tables and approximation";
String REMARK_31 " Applied Optics, 28, 4735 - 4738, 1989.";
String REMARK_32 " Knobelspiesse, K.D. et al., Sun-pointing-error correction for sea deployment";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 42.23552;
String standard_name_vocabulary "CF Standard Name Table v29";
String subsetVariables "traj, id";
String summary "Pacific Marine Environmental Laboratory (PMEL) Atmospheric Chemistry New England Air Quality Study - 2004 irregular 3 data";
String time_coverage_end "2004-08-10T20:46:21Z";
String time_coverage_start "2004-07-06T13:40:27Z";
String TIME_PAR "year month day hour minute second";
String title "PMEL Atmospheric Chemistry NEAQAS2004 Experiment irregular 3 data";
Float64 Westernmost_Easting -71.04792;
}
}
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