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The First Airborne Arctic Stratospheric Expedition (AASE-I) and the Meteorological Measurement System (MMS) Data CD-ROM's

Entry ID: AASE89

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Summary

Abstract: The first CD-ROM contains the Second Edition of data pertaining to the First Airborne Arctic Stratospheric Expedition (AASE-I) which was based in Stavanger, Norway during January and February, 1989. The First Edition of this dataset, produced in March 1990, was corrupted by many data errors introduced during production of the CD-ROM. The form of the errors was a random conversion of characters to ... spaces but hopefully the random data errors are not present in this edition. The second CD-ROM contains all of the 5 Hz data from the ER-2 Meteorological Measurement System (MMS) taken during the 1989 AASE-I associated with flights during which mesoscale disturbances were observed. This disc was generated as an appendix to the primary AASE-I CD-ROM dataset.

The data consists of measurements collected onboard the NASA ER-2 and DC-8 aircraft, ozonesonde soundings from three stations (Angmagssalik and Scoresbysund, Greenland, and Lerwick, U.K.), aerosol and temperature profiles from the SAM II spacecraft, global grid point values of Nimbus-7 TOMS ozone, and selected radiosonde soundings from stations in the region of the experiment. This expedition was aimed at studying the production and loss mechanisms of ozone in the north polar stratospheric environment, and the effect on ozone distribution of the Arctic polar vortex and of the cold temperatures associated with the formation of Polar Stratospheric Clouds (PSC). The mission was organized and funded by NASA, NOAA, NSF, universities, Chemical Manufacturers Association, and meteorological agencies overseas, utilizing similar instrumentation that was deployed during the Airborne Antarctic Ozone Experiment (AAOE) of 1987.

Theory teams provided calculations of: potential vorticity along the ER-2 flight path; cross-sections of potential vorticity, temperature, and geopotential heights along the DC-8 flight path; cross-sections of Clx, Fx, HCl, HNO3, and NOy along the DC-8 flight path; global grid point values of temperature, geopotential heights, and horizontal winds on selected pressure surfaces; northern hemispheric grid point values of potential vorticity and pressure on selected potential temperature surfaces.

Because of its limited range, the ER-2 is not be able to survey the entire Arctic region. The ER-2 measured ozone, chlorine monoxide, nitric oxide, reactive nitrogen, nitrous oxide, total water, bromine monoxide, nitric acid, condensation nuclei, aerosol size distribution, whole air sampling, and particle chemistry and size. The DC-8 can cover a greater range, enabling it to survey the polar vortex and air processed through the cold temperature region of the polar vortex. The DC-8 collected information similar to that of the ER-2, along with the vertical distribution of ozone and aerosols, methane, and in situ measurements of ozone.

All files within this release are standard ASCII files with variable length records terminated by (ASCII decimal values 13 and 10). In general, the file naming convention uses a two character prefix to identify the measurement, followed by a six digit number giving the year, month, and day (GMT) of the flight (or balloon launch). To identify the measurement platform, a three character name as in ER2, DC8, or Bhh is used to denote the data is from the ER-2, DC-8, or balloon (hh denotes the GMT hour of launch).

AASE-I discovered that while NOx and to some degree NOy were perturbed within the arctic vortex, there was little evidence for desiccation. Under these (in contrast to the antarctic) marginally perturbed conditions, however, CLO was found to be dramatically enhanced such that a large fraction of the available (inorganic) chlorine resided in the form of CLO and its dimmer CLOOCL.

A follow-up phase, AASE-II, was conducted in 1991 and 1992.

Related URL

Link: GET DATA

Link: VIEW PROJECT HOME PAGE

Description: Airborne Arctic Stratospheric Expedition (AASE) Home Page

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 90.0

S: 60.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: NASA, NOAA, NSF, Universities, Chemical Manufacturers Association, and Meteorological agencies overseas

Dataset Title: The First Airborne Arctic Stratospheric Expedition (AASE-I) and the Meteorological Measurement System (MMS) Data CD-ROM's

Online Resource: http://cloud1.arc.nasa.gov/aase/

Temporal Coverage

Start Date: 1989-01-01

Stop Date: 1989-02-28

Location Keywords

OCEAN > ARCTIC OCEAN

GEOGRAPHIC REGION > ARCTIC

Science Keywords

ATMOSPHERE > AEROSOLS > AEROSOL EXTINCTION

ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

ENVIRONMENT

Platform

NIMBUS-7

NASA ER-2 > NASA Earth Resources-2

Instrument

HYGROMETERS

MMS > Meteorological Measurement System

Project

AASE > Airborne Arctic Stratospheric Expedition

SAM-II > Stratospheric Aerosol Measurement II

Ancillary Keywords

CD-ROM

Originating Center

ARC

Data Center

Earth Science Project Office, Earth Sciences Division, Ames Research Center, NASA

Data Center URL: http://www.espo.nasa.gov/
Dataset ID: AASE89

Data Center Personnel
Name: STEVE HIPSKIND Email: steve.hipskind at nasa.gov Contact Address: NASA Ames Research Center

Distribution

Distribution Media: CD-ROM

Personnel

K. ROLAND CHAN

Role: INVESTIGATOR

Contact Address:

NASA Ames Research Center

MS 245-5

City: Moffett Field

Province or State: CA

Postal Code: 94035

Country: USA

Publications/References

AASE Project Office (1988/1989), Airborne Arctic Stratospheric Expedition, NASA Ames Research Center, Moffett Field, CA 94035, An overview of the 1989 AASE.

Anderson, J.G., and O.B. Toon, (1993), Airborne Arctic Stratospheric Expedition II: An Overview, Geophys. Res. Lett., 20, 2499-2502

Creation and Review Dates

Last DIF Revision Date: 2011-04-15

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