AIRS/Aqua Level 3 Monthly CO2 in the free troposphere (AIRS+AMSU) V005 (AIRX3C2M) at GES DISCEntry ID: GES_DISC_AIRX3C2M_V005
Abstract: This is the AIRS mid-tropospheric Carbon Dioxide (CO2) Level 3 Monthly Gridded Retrieval, from the AIRS and AMSU instruments on board of Aqua satellite. It is a monthly gridded data, at 2.5x2 deg (lon)x(lat) grid cell size. The data is in mole fraction units (data x 10^6 =ppm in volume). This quantity is not a total column quantity because the sensitivity function of the AIRS mid-tropospheric CO2 ... retrieval system peaks over the altitude range 6-10 km. The quantity is what results when the true atmospheric CO2 profile is weighted, level-by-level, by the AIRS sensitivity function. The file format is HDF-EOS 2.12 corresponding to HDF4.
This AIRS mid-tropospheric CO2 Level 3 Monthly Gridded Retrieval Product contains standard retrieval means, standard deviations and input counts as well as the latitude and longitude arrays giving the centers of the grid boxes. Each file covers a calendar month. The mean values are simply the arithmetic means of the individual CO2 retrievals which fall within that grid box over the month.
The mid-tropospheric CO2 retrievals have been averaged and binned into 2.5 x 2 deg grid cells, from -180.0 to +180.0 deg longitude and from -60.0 to +90.0 deg latitude. For each grid map of 4-byte floating-point mean values there is a corresponding 4-byte floating-point map of standard deviation and a 2-byte integer grid map of counts. The counts map provides the user with the number of points per bin that were included in the mean.
(The Shortname for this product is AIRX3C2M).
With the availability of newly released V6 products, this product is no longer produced effective 2012/02/29.
Data Set Citation
Dataset Originator/Creator: AIRS Science Team/Moustafa Chahine
Dataset Title: AIRS/Aqua Level 3 Monthly CO2 in the free troposphere (AIRS+AMSU)
Dataset Series Name: AIRX3C2M
Dataset Release Date: 2008-12-15
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Data Presentation Form: Digital Science DataOnline Resource: http://disc.sci.gsfc.nasa.gov/datacollection/AIRX3C2M_V005.html
Start Date: 2002-09-01Stop Date: 2012-02-29
Latitude Resolution: 2 degrees; 1.5 degrees at the Poles; Fill values < -60 degrees
Longitude Resolution: 2.5 degrees
Horizontal Resolution Range: 250 km - < 500 km or approximately 2.5 degrees - < 5.0 degrees
Temporal Resolution: Once per month; Day and Night
ISO Topic Category
Quality Users should read information contained within the two documents below to avoid misuse of the data in their research.
Data Set Progress
Distribution Format: HDF-EOS
Role: DIF AUTHOR
Role: TECHNICAL CONTACT
Email: Thomas.J.Hearty at nasa.gov
Distributed Active Archive Center Global Change Data Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2008-12-12
Last DIF Revision Date: 2014-06-13
Future DIF Review Date: 2015-01-30