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

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• Identification_Information
• Data_Quality_Information
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• Distribution_Information
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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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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

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

Spatial_Reference_Information:

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

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