NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
MERRA-2 Input Observations: Summary and AssessmentThe Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) is an atmospheric reanalysis, spanning 1980 through near-realtime, that uses state-of-the-art processing of observations from the continually evolving global observing system. The effectiveness of any reanalysis is a function not only of the input observations themselves, but also of how the observations are handled in the assimilation procedure. Relevant issues to consider include, but are not limited to, data selection, data preprocessing, quality control, bias correction procedures, and blacklisting. As the assimilation algorithm and earth system models are fundamentally fixed in a reanalysis, it is often a change in the character of the observations, and their feedbacks on the system, that cause changes in the character of the reanalysis. It is therefore important to provide documentation of the observing system so that its discontinuities and transitions can be readily linked to discontinuities seen in the gridded atmospheric fields of the reanalysis. With this in mind, this document provides an exhaustive list of the input observations, the context under which they are assimilated, and an initial assessment of selected core observations fundamental to the reanalysis.
Document ID
20160014544
Document Type
Technical Memorandum (TM)
Authors
Koster, Randal D. (NASA Goddard Space Flight Center Greenbelt, MD United States)
McCarty, Will (NASA Goddard Space Flight Center Greenbelt, MD United States)
Coy, Lawrence (Science Systems and Applications, Inc. Lanham, MD, United States)
Gelaro, Ronald (NASA Goddard Space Flight Center Greenbelt, MD United States)
Huang, Albert (Science Systems and Applications, Inc. Lanham, MD, United States)
Merkova, Dagmar (Science Systems and Applications, Inc. Lanham, MD, United States)
Smith, Edmond B. (Science Systems and Applications, Inc. Lanham, MD, United States)
Sienkiewicz, Meta (Science Systems and Applications, Inc. Lanham, MD, United States)
Wargan, Krzysztof (Science Systems and Applications, Inc. Lanham, MD, United States)
Date Acquired
December 7, 2016
Publication Date
October 1, 2016
Subject Category
Geosciences (General)
Report/Patent Number
GSFC-E-DAA-TN37524
NASA/TM-2016-104606 /VOL46
Funding Number(s)
CONTRACT_GRANT: NNG12HP06C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Satellite Observations
Ozone
MERRA-2

Available Downloads

NameType 20160014544.pdf STI