The Second Airborne Arctic Stratospheric Expedition (AASE-II) on CD-ROM

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Identification_Information:
Citation:
Citation_Information:
Originator: Airborne Arctic Stratospheric Expedition II Team (AASE-II)
Publication_Date: Unknown
Title: The Second Airborne Arctic Stratospheric Expedition (AASE-II) on CD-ROM
Edition:
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Publication_Information:
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Online_Linkage: http://cloud1.arc.nasa.gov
Description:
Abstract:
This CD-ROM contains the final data pertaining to the Airborne Arctic Stratospheric Expedition II (AASE-II) which was based in Bangor, Maine between October 1991 and March 1992, with ER-2 flights from Ames Research Center, Moffett Field (California), Fairbanks (Alaska), and Bangor (Maine), along with and DC-8 flights from Ames, Bangor, Anchorage (Alaska), Stavanger (Norway), and Tahiti. The data consist of measurements collected onboard the NASA ER-2 and DC-8 aircraft, ozonesonde soundings from six Canadian stations, global grid point values of Nimbus 7 TOMS ozone, and selected radiosonde soundings from stations in the region of the experiment. Theory teams provided calculations of potential vorticity, temperature, geopotential, horizontal winds, parcel back trajectories, and concentrations of short lived species along the aircraft flight tracks; and northern hemispheric analyses of potential vorticity, temperature, geopotential, horizontal winds, and radiative heating rates. All files within this release are standard ASCII files with variable length records terminated by a carriage return/line feed pair (<CR><LF>, ASCII decimal values 13 and 10). Therefore, MS-DOS users should be able to read them as they are, but UNIX and MAC users will have to strip off either the <CR> or the <LF> from each line to convert them to standard UNIX or MAC files. Commercially available software, such as dos2unix and Apple File Exchange, exists to convert MS-DOS files to both UNIX and MAC files. VMS users can define the files to have STREAM record formats. In general, the file naming convention uses a two-character prefix to identify the measurement, followed by a six digit number (yymmdd) giving the year, month, and day (UT) of the flight, balloon launch, or model result. To identify the measurement platform, a three character extension of EA1, DA1, Bhh, or Ghh is used to denote the data is from the ER-2, DC-8, balloon, or grid point model output (hh denotes the UT hour of balloon launch or model result). Exceptions to this convention are the SFyymmdd.Enn files which use the extensions E00, E01, E05, E30 to denote aerosol loading factors; the TOMS data files which have the extensions N7; and the chemical modelling result MA911006.H00. The NASA ER-2 and DC-8 aircraft and balloons were employed to carry a suite of instruments into the lower stratosphere. Many of these were used in the 1989 AASE-I. New instruments included a gas chromatograph to measure CFC-11, a diode laser spectrometer to measure CH4, N2O, and HCL, and spectrometers to measure in situ CO, CH4, N2O, and CO2. The ER-2 was deployed from Ames Research Center, California (37N, 122W), to Fairbanks, Alaska (65N, 147W) in October 1991, so that air could be observed at the highest possible latitudes before it was incorporated into the forming polar vortex. In November 1991, the ER-2 was moved to Bangor, Maine (45N, 69W) where it would have a high probability of encountering air in the arctic vortex, but could still have acceptable weather for aircraft operations. The ER-2 missions involved flights to Greenland, 20N, 25N, 55N, 65N, 70N, 85N, and 90N. The DC-8 missions involved flights to Tahiti, Norway, Wyoming, 15N, 20N, 65N, and 90N. On March 11, 1992, a balloon launched from Greenland (67.0N, 50.6W) carried instruments to measure O3, NO, and CLO. The objective of the balloon launch was to extend the aircraft measurements to higher latitudes. The Canadian Ozone Experiment (CANOZE-7) launched balloons from December 1991 to March 1992 from Alert, Canada (82N, 62W). The nitric acid measurements made from these balloons are also reported here. The AASE-II data set provides the first seasonal perspective on polar ozone chemistry in the northern hemisphere. It also provides the first detailed investigations of the chemistry occurring on volcanic sulfuric acid aerosols. The data show clearly the important counterbalance between dynamical resupply of ozone in the arctic vortex and ongoing chemical destruction. The aircraft measurements also show the important role of nitrogen oxides, produced by nitric acid photolysis, in destroying CLO after temperatures become too high for polar stratospheric clouds to form. These results highlight the fact that large ozone losses in the arctic spring require either extensive denitrification of the vortex, which could occur if temperatures fell below that at which ice clouds form, or long lasting polar stratospheric clouds, that will occur if temperatures remain low enough for nitric acid to condense for extended periods of time. Neither extremely low temperatures, with extensive denitrification, nor a prolonged period of low temperatures occurred in 1992. Therefore, although very high levels of CLO were present in the arctic vortex in January 1992, the ozone loss that occurred was limited by the rapid decline of CLO in February. Other winters, such as 1992-1993, which had much more persistent low temperatures, may have conditions more conducive to significant ozone loss. It is also clear from the AASE-II data set that volcanic aerosols do significantly perturb stratospheric chemistry. However, some of the reactions are saturated at aerosol surface areas only slightly greater that ambient, and others depend strongly on temperature. Therefore, an assessment of the impact of the Pinatubo eruption on global ozone requires careful treatment of the entire thermal, dynamical, aerosol and chemical evolution of the stratosphere.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Anderson, J.G., and O.B. Toon 1993 Airborne Arctic Stratospheric Expedition II: An Overview Geophys. Res. Lett. 20 2499-2502
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19911004
Ending_Date: 19920326
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 20.0
North_Bounding_Coordinate: 90.0
South_Bounding_Coordinate: -17.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL EXTINCTION
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > PARTICULATE MATTER
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > SULFATE PARTICLES
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AIR QUALITY > CARBON MONOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES > BROMINE MONOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > POTENTIAL TEMPERATURE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROFILES
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > VORTICITY
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD TYPES > POLAR STRATOSPHERIC CLOUDS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > ERUPTION DYNAMICS > VOLCANIC GASES
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON MONOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > METHANE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > CHLORINE MONOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > CHLOROFLUOROCARBONS > CFC-11
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITRIC ACID
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROGEN DIOXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROGEN OXIDES > REACTIVE NITROGEN OXIDES
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROUS OXIDE
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > OZONE
Theme_Keyword: BALLOONS
Theme_Keyword: GROUND STATIONS
Theme_Keyword: NIMBUS-7
Theme_Keyword: DC-8 > DOUGLAS DC-8
Theme_Keyword: NASA ER-2 > NASA EARTH RESOURCES-2
Theme_Keyword: AEROSOL/CLOUD PARTICLE SIZER
Theme_Keyword: HYGROMETERS
Theme_Keyword: MMS > METEOROLOGICAL MEASUREMENT SYSTEM
Theme_Keyword: PROFILERS
Theme_Keyword: GAS CHROMATOGRAPHS
Theme_Keyword: LIDAR > LIGHT DETECTION AND RANGING
Theme_Keyword: MARK IV INTERFEROMETER
Theme_Keyword: PHOTOMETERS
Theme_Keyword: SUN PHOTOMETERS
Theme_Keyword: OZONESONDES
Theme_Keyword: RADIOSONDES
Theme_Keyword: TEMPERATURE PROFILERS
Theme_Keyword: FOURIER TRANSFORM SPECTROMETERS
Theme_Keyword: FTIR SPECTROMETER > FOURIER TRANSFORM INFRARED SPECTROMETER
Theme_Keyword: INFRARED RADIOMETERS
Theme_Keyword: INTERFEROMETERS
Theme_Keyword: RADIOMETERS
Theme_Keyword: SPECTROMETERS
Theme_Keyword: TOMS > TOTAL OZONE MAPPING SPECTROMETER
Theme_Keyword: AASE-II > AIRBORNE ARCTIC STRATOSPHERIC EXPEDITION-II
Theme_Keyword: SAM-II > STRATOSPHERIC AEROSOL MEASUREMENT II
Theme_Keyword: Bro
Theme_Keyword: Bromine Monoxide
Theme_Keyword: Cd-rom
Theme_Keyword: Cfc-11
Theme_Keyword: Chlorine Monoxide
Theme_Keyword: Clo
Theme_Keyword: Co
Theme_Keyword: Co2
Theme_Keyword: Grid Data
Theme_Keyword: Horizontal Winds
Theme_Keyword: Hydrogen Chloride
Theme_Keyword: Model Data
Theme_Keyword: N2o
Theme_Keyword: Nitric Oxide
Theme_Keyword: No
Theme_Keyword: O3
Theme_Keyword: Parcel Back Trajectories
Theme_Keyword: Polar Ozone Chemistry
Theme_Keyword: Potential Vorticity
Theme_Keyword: Radiative Heating Rates
Theme_Keyword: Reactive Nitrogen
Theme_Keyword: Stratospheric Chemistry
Theme_Keyword: Upper Air
Theme_Keyword: Vertical Profiles
Theme_Keyword: Volcanic Sulfuric Acid Aerosols
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ENVIRONMENT
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > ARCTIC OCEAN
Place_Keyword: CONTINENT > NORTH AMERICA > CANADA
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Place_Keyword: CONTINENT > AFRICA > ALGERIA
Place_Keyword: CONTINENT > AFRICA > MALI
Place_Keyword: CONTINENT > AFRICA > SENEGAL
Place_Keyword: CONTINENT > AFRICA > GUINEA
Place_Keyword: CONTINENT > AFRICA > GHANA
Place_Keyword: CONTINENT > AFRICA > ALGERIA
Place_Keyword: CONTINENT > AFRICA > MOROCCO
Place_Keyword: CONTINENT > AFRICA > BENIN
Place_Keyword: CONTINENT > AFRICA > NIGERIA
Place_Keyword: CONTINENT > AFRICA > CONGO
Place_Keyword: CONTINENT > AFRICA > GABON
Place_Keyword: CONTINENT > AFRICA > NIGER
Place_Keyword: CONTINENT > AFRICA > LIBYA
Place_Keyword: CONTINENT > AFRICA > CHAD
Place_Keyword: CONTINENT > EUROPE
Place_Keyword: CONTINENT > NORTH AMERICA
Place_Keyword: GEOGRAPHIC REGION > EQUATORIAL
Place_Keyword: GEOGRAPHIC REGION > MID-LATITUDE
Place_Keyword: GEOGRAPHIC REGION > POLAR
Place_Keyword: VERTICAL LOCATION > STRATOSPHERE
Place_Keyword: VERTICAL LOCATION > TROPOSPHERE
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JAMES G. ANDERSON
Contact_Person_Primary:
Contact_Person: BRIAN TOON
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Department of Chemistry/Earth/Planetary Sciences
Address: Harvard University
Address: 12 Oxford Street
City: Cambridge
State_or_Province: MA
Postal_Code: 02138
Country: USA
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Ames Research Center
City: Moffett Field
State_or_Province: CA
Postal_Code: 94035
Country: USA
Contact_Voice_Telephone: (617) 495-5922
Contact_Electronic_Mail_Address: toon@lasp.colorado.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NASA/ARC/ESD/ESPO > Earth Science Project Office, Earth Sciences Division, Ames Research Center, NASA
Contact_Person: STEVE HIPSKIND
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Ames Research Center
Contact_Electronic_Mail_Address: steve.hipskind@nasa.gov
Resource_Description: AASE9192 CD-ROM
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.espo.nasa.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://cloud1.arc.nasa.gov/aase2/project/cdrom.htm...
Access_Instructions:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://cloud1.arc.nasa.gov/aase2/
Access_Instructions:
Airborne Arctic Stratospheric Expedition II (AASE II) Home Page
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date:
Metadata_Review_Date: 20110415
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: SCOTT A. RITZ
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NASA Goddard Space Flight Center
Address: Global Change Master Directory
City: Greenbelt
State_or_Province: Maryland
Postal_Code: 20771
Country: USA
Contact_Voice_Telephone: 301-614-5126
Contact_Facsimile_Telephone: 301-614-5268
Contact_Electronic_Mail_Address: Scott.A.Ritz@nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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