Stratospheric Aerosol Measurement II (SAM II)

General Info

Title:	Stratospheric Aerosol Measurement II (SAM II)
Type:	Data Entity
Sub-Type:	Measurement
Abbreviation:	SAM II
Publication State:	published
The publication state of this metadata: 'old' - for redundant records; 'working' - for new/in progress records; 'published' - for records approaching maturity, which may still change, but should be available via the discovery services; and 'Published' for mature records that are unlikely to change and should be available via the discovery services.

URI:	http://badc.nerc.ac.uk/view/badc.nerc.ac.uk__ATOM__dataent_SAM2

Summary
A brief description of the data.

Dataset contained 14 years of polar Arctic and Antarctic aerosol extinction profiles obtained from the Stratospheric Aerosol Instrument II (SAM II) on the NIMBUS 7 satellite. NMC temperatures, pressure and equivalent altitudes also provided. Daily data for sunsets and sunrises are available for a 14 year period 1978-93. SAM II is a public dataset.

Content
The actual data being described by this document. NB, in the case of data granules, this content may just be a reference to an ingested CSML or CDML file.

Introduction

This dataset contains over 14 years of polar Arctic and Antarctic aerosol profiles obtained with the Stratospheric Aerosol Measurement II (SAM II) satellite experiment. The SAM II instrument, aboard the Nimbus 7 spacecraft, measured attenuation of solar radiation by aerosol particles during sunsets and sunrises.

For each measurement event, vertical profiles of extinction km^-1, extinction ratio, and NMC temperatures and pressures are provided as a function of altitude. Separate files containing the NMC temperatures and geometric altitudes on the standard pressure levels are also included.

The data coverage begins in October 1978 and extends until January 1993.

The data are archived at the NASA Langley Research Center. This data is a copy of the NASA CD-ROM.

Restricted Data Access

The data are held on CD-ROM at the BADC and are available for browsing purposes. If you want to use the data in earnest you should order a copy of the CD from the contact listed below. Please ensure that you comply with the Langley DAAC Conditions of Use for this dataset.

Data availability and file format

All of the data in this dataset are stored as ASCII text. The data are subdivided into directories for each year. Each file within these directories contains a month's data.

Documentation and Links to further information and references

The documentation on the CD-ROM is available in the README file and is made available through this interface.

References

The primary reference for the SAM II data is the SAM II data users guide Chu et al, 1988, NASA Reference Publication-1200.

We have also listed a number of other references which you may find useful.

Citation

Date of citation

Who to contact

For general queries about these pages or about browsing the data, you should contact the BADC support line.

For further information about the data contact M. Patrick McCormick at Nasa Langley. To obtain a copy of the CD you should contact User and Data Services at the NASA Langley DAAC.

Lineage
Summary of the origins of the dataset, e.g.: "Dataset produced from NASA MODIS instrument on Terra and collected at the University of York's groundstation 1999-2003 and a copy provided to NEODC in June 2007".

Data collected and prepared by NASA and published on CD-ROM. BADC obtained a copy to make available in the BADC archives to assist users wishing to access these data.

Quality Statement
Description of the relative quality of the dataset.

Data obtained and prepared by NASA

Author
The principal author of the actual underlying data. Only one author can be specified per atom; if there are multiple authors, these should be specified as 'contributors'. NB, an atom MUST have an author specified.

Name	email
National Aeronautics and Space Administration (NASA)

Contributors
Any other authors of the actual underlying data. NB, the principal author should be specified in the 'Author' input field. Also, note, three contributors can be added at once; after these are added a further three may be specified - and so on.

Name	email
McCormick, MP
Powell, K

Online References
Online references with a specific relationship to the data being described here. NB, if links are supplied they must be valid and include the transport protocol - e.g. 'http://blah.co.uk'. Also, note, three online references can be added at once; after these are added a further three may be specified - and so on.

Relation	Title
Download	SAM 2 Data Directory
Logo	SAM 2 Logo
Documentation	BADC Doc: SAM 2 List of References

Parent Data Entity
Define the parent of this record. There should probably only be one parent, but this is not enforced.

No data specified at present

Sub Data Entities
Lists all entities which have the current entity as their parent.

None

Associated Deployments

Parameters - summary

TEMPERATURE	AIRTEMPERATURE	ATMOSPHERICTEMPERATURE	ATMOSPHERE
EARTH SCIENCE	NULL	EXTINCTIONAT1MICRON	AEROSOLEXTINCTION
AEROSOLS	ATMOSPHERICPRESSURE

Parameters - details
Parameters to describe the data - with vocab URL and term IDs for further classification. Note, three parameters can be added at once; after these are added a further three may be specified - and so on.

Label	Vocab Term URL	Vocab Term ID
TEMPERATURE	http://vocab.ndg.nerc.ac.uk/term/null	NULL
AIRTEMPERATURE	http://vocab.ndg.nerc.ac.uk/term/null	NULL
ATMOSPHERICTEMPERATURE	http://vocab.ndg.nerc.ac.uk/term/P141	NULL
ATMOSPHERE	http://vocab.ndg.nerc.ac.uk/term/P131	NULL
EARTH SCIENCE	http://vocab.ndg.nerc.ac.uk/term/P111	GCAT0001
NULL	general_units	0
EXTINCTIONAT1MICRON	http://vocab.ndg.nerc.ac.uk/term/null	NULL
AEROSOLEXTINCTION	http://vocab.ndg.nerc.ac.uk/term/null	NULL
AEROSOLS	http://vocab.ndg.nerc.ac.uk/term/P141	NULL
ATMOSPHERICPRESSURE	http://vocab.ndg.nerc.ac.uk/term/P141	NULL

Data Coverage
Summary of the temporal and spatial data coverage for the data.

Spatial coverage
Max Y: 83.0
Min X: -180.0	Max X 180.0
Min Y -83.0

Temporal coverage
Start Date:	1978-10-01
End Date:	1993-01-31

Spatial resolution

No spatial resoultion information available.

Vertical extent

No vertical extent information available.

Responsible Parties
Parties responsible for the metadata - e.g. data curator. Responsible parties can have a role specified to make their function clearer. Multiple responsible parties can be specified.

Role	Name	URI
Data Curator	badc.nerc.ac.uk	http://badc.nerc.ac.uk

Other Info
Other miscellaneous information. Note, update frequency relates to the update frequency of the underlying data, not the metadata.

Dataset language

English

Update frequency

notPlanned

Links and Services
	Downloadable XML version of this record

Not all information in this record may be rendered in this view. Please see the XML version for complete content

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