The Pacific Marine Environmental Laboratory's ERDDAP data server for public access to scientific data
NOAA OAR PMEL
|
Easy Access to PMEL Scientific Data
The Pacific Marine Environmental Laboratory's ERDDAP data server for public access to scientific data |
NOAA OAR PMEL |
| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| set | data | graph | PMEL Atmospheric Chemistry ATOMIC CCN 10 second data |
| F I M | background
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| EUREC4A_ATOMIC_RonBrown_PMEL_CCN_v2 |
| 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 Droplet Measurement Technologies CCN Counter (DMT CCNC) was used to determine CCN concentrations of sub-1 um particles at supersaturations ranging from 0.1 to 0.62%. A multijet cascade impactor with a 50% aerodynamic cut-off diameter of 1.1 um was upstream of the CCNC. The sampled air was dried prior to reaching the CCNC. Details concerning the characteristics of the DMT CCN counter can be found in Roberts and Nenes [2005] and Lance et al. [2006]. The CCN counter was calibrated before and during the experiment as outlined by Lance et al. [2006]. The uncertainty associated with the CCN number concentration is estimated to be less than +/- 10% [Roberts and Nenes, 2005]. Uncertainty in the instrumental supersaturation is less than +/- 10% for the operating conditions of this experiment [Roberts and Nenes, 2005]. The data are in 10 second time intervals and include CCN concentration (in n/cm^3), CCN/CN ratio, and Supersaturation (in %). Lance, S., J. Medina, J.N. Smith, and A. Nenes, Mapping the operation of the DMT continuous flow CCN counter, Aer. Sci. Tech., 40, 242 - 254, 2006. Roberts, G.C. and A. Nenes, A continuous-flow streamwise thermal gradient CCN chamber for atmospheric measurements, Aer. Sci. Tech., 39, 206 - 221, 2005. |
| 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 | 2020-11-30T17:19:26Z |
| 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 | aerosol, air, atmospheric, atomic, ccn, ccn_cn_ratio, chemistry, cloud, cloud cover, cloudiness, concentration, condensation, cover, data, environmental, identifier, laboratory, latitude, longitude, marine, noaa, nuclei, number, number_concentration_of_aerosol_particles_at_stp_in_air, number_concentration_of_cloud_condensation_nuclei_at_stp_in_air, pacific, particles, pmel, ratio, ratio_of_number_concentration_of_cloud_condensation_nuclei_to_number_concentration_of_aerosol_particles_at_stp_in_air, second, statistics, stp, supersaturation, time, trajectory, trajectory_id |
| 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 | 2 |
| 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 | 2020-02-11T23:59:50Z |
| attribute | NC_GLOBAL | time_coverage_start | String | 2020-01-07T18:00:00Z |
| attribute | NC_GLOBAL | title | String | PMEL Atmospheric Chemistry ATOMIC CCN 10 second 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, 1.58146559E9 |
| 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 |
| variable | cn | double | ||
| attribute | cn | _FillValue | double | -1.0E34 |
| attribute | cn | actual_range | double | 73.4832, 46337.1 |
| attribute | cn | colorBarMaximum | double | 100.0 |
| attribute | cn | colorBarMinimum | double | 0.0 |
| attribute | cn | epic_code | String | 1853 |
| attribute | cn | instrument | String | TSI 3010 (sn: 2470) |
| attribute | cn | ioos_category | String | Statistics |
| attribute | cn | long_name | String | Number Concentration of Particles |
| attribute | cn | missing_value | double | -999.0 |
| attribute | cn | source | String | surface observation |
| attribute | cn | standard_name | String | number_concentration_of_aerosol_particles_at_stp_in_air |
| attribute | cn | units | String | cm-3 |
| attribute | cn | valid_max | double | 50000.0 |
| attribute | cn | valid_min | double | 0.0 |
| variable | ss | double | ||
| attribute | ss | _FillValue | double | -1.0E34 |
| attribute | ss | actual_range | double | 0.06, 0.66 |
| attribute | ss | colorBarMaximum | double | 100.0 |
| attribute | ss | colorBarMinimum | double | 0.0 |
| attribute | ss | epic_code | String | 6201 |
| attribute | ss | instrument | String | DMT CCNC (sn: 0805-0021) |
| attribute | ss | ioos_category | String | Unknown |
| attribute | ss | long_name | String | Supersaturation |
| attribute | ss | missing_value | double | -999.0 |
| attribute | ss | source | String | surface observation |
| attribute | ss | units | String | percent |
| attribute | ss | valid_max | double | 1.6 |
| attribute | ss | valid_min | double | 0.0 |
| variable | ccn | double | ||
| attribute | ccn | _FillValue | double | -1.0E34 |
| attribute | ccn | actual_range | double | 0.0, 5495.11 |
| attribute | ccn | colorBarMaximum | double | 100.0 |
| attribute | ccn | colorBarMinimum | double | 0.0 |
| attribute | ccn | epic_code | String | 6200 |
| attribute | ccn | instrument | String | DMT CCNC (sn: 0805-0021) |
| attribute | ccn | ioos_category | String | Statistics |
| attribute | ccn | long_name | String | Number Concentration of Cloud Condensation Nuclei |
| attribute | ccn | missing_value | double | -999.0 |
| attribute | ccn | source | String | surface observation |
| attribute | ccn | standard_name | String | number_concentration_of_cloud_condensation_nuclei_at_stp_in_air |
| attribute | ccn | units | String | cm-3 |
| attribute | ccn | valid_max | double | 50000.0 |
| attribute | ccn | valid_min | double | 0.0 |
| variable | ccn_cn_ratio | double | ||
| attribute | ccn_cn_ratio | _FillValue | double | -1.0E34 |
| attribute | ccn_cn_ratio | actual_range | double | 0.0, 29.8666 |
| attribute | ccn_cn_ratio | colorBarMaximum | double | 100.0 |
| attribute | ccn_cn_ratio | colorBarMinimum | double | 0.0 |
| attribute | ccn_cn_ratio | epic_code | String | 6202 |
| attribute | ccn_cn_ratio | instrument | String | DMT CCNC (sn: 0805-0021); TSI 3010 (sn: 2470) |
| attribute | ccn_cn_ratio | ioos_category | String | Statistics |
| attribute | ccn_cn_ratio | long_name | String | Ratio of CCN to CN |
| attribute | ccn_cn_ratio | missing_value | double | -999.0 |
| attribute | ccn_cn_ratio | source | String | surface observation |
| attribute | ccn_cn_ratio | standard_name | String | ratio_of_number_concentration_of_cloud_condensation_nuclei_to_number_concentration_of_aerosol_particles_at_stp_in_air |
| attribute | ccn_cn_ratio | units | String | 1 |
| attribute | ccn_cn_ratio | valid_max | double | 2.0 |
| attribute | ccn_cn_ratio | valid_min | double | 0.0 |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.