The following years of GEOS assimilated meteorological observations have been downloaded and processed from NASA's Global Modeling and Assimilation Office (GMAO), and are now being used for GEOS–Chem model simulations.

NOTES:

1. For the availability of meteorological fields for the GCAP project, please ask Loretta Mickley (mickleyfas.harvard.edu).
2. GEOS–5 data is the operational data set (2005–2007: GEOS–5.0.1 and 2008–present: GEOS–5.1.0).
3. At this time GEOS–Chem is not compatible with the MERRA reanalysis met data.

GMAO Meteorological Fields Availability Chart for GEOS–Chem

Legend

Abbreviation	Met Field Type	Color
G3 CH	GEOS–3 China Nested Grid — 1 x 1 resolution
G3 NA	GEOS–3 North America Nested Grid — 1 x 1 resolution
G3 2x25	GEOS–3 Global Grid — 2 x 2.5 resolution
G3 4x5	GEOS–3 Global Grid — 4 x 5 resolution
G4 raw	GEOS–4 Global Grid — 1 x 1.25 (native) resolution
G4 2x25	GEOS–4 Global Grid — 2 x 2.5 resolution
G4 4x5	GEOS–4 Global Grid — 4 x 5 resolution
G5 CH	GEOS–5 China Nested Grid — 0.5 x 0.667 resolution
G5 NA	GEOS–5 North America Nested Grid — 0.5 x 0.667 resolution
G5 2x25	GEOS–5 Global Grid — 2 x 2.5 resolution
G5 4x5	GEOS–5 Global Grid — 4 x 5 resolution

Month	G3 CH	G3 NA	G3 2x25	G3 4x5	G4 raw	G4 2x25	G4 4x5	G5 CH	G5 NA	G5 2x25	G5 4x5
2008-05
2008-04
2008-03
2008-02
2008-01
2007-12
2007-11
2007-10
2007-09
2007-08
2007-07
2007-06
2007-05
2007-04
2007-03
2007-02
2007-01
2006-12
2006-11
2006-10
2006-09
2006-08
2006-07
2006-06
2006-05
2006-04
2006-03
2006-02
2006-01
2005-12
2005-11
2005-10
2005-09
2005-08
2005-07
2005-06
2005-05
2005-04
2005-03
2005-02
2005-01

Month	G3 CH	G3 NA	G3 2x25	G3 4x5	G4 raw	G4 2x25	G4 4x5	G5 CH	G5 NA	G5 2x25	G5 4x5
2004-12
2004-11
2004-10
2004-09
2004-08
2004-07
2004-06
2004-05
2004-04
2004-03
2004-02
2004-01
2003-12
2003-11
2003-10
2003-09
2003-08
2003-07
2003-06
2003-05
2003-04
2003-03
2003-02
2003-01
2002-12
2002-11
2002-10
2002-09
2002-08
2002-07
2002-06
2002-05
2002-04
2002-03
2002-02
2002-01
2001-12
2001-11
2001-10
2001-09
2001-08
2001-07
2001-06
2001-05
2001-04
2001-03
2001-02
2001-01
2000-12
2000-11
2000-10
2000-09
2000-08
2000-07
2000-06
2000-05
2000-04
2000-03
2000-02
2000-01

Month	G3 CH	G3 NA	G3 2x25	G3 4x5	G4 raw	G4 2x25	G4 4x5	G5 CH	G5 NA	G5 2x25	G5 4x5
1999-12
1999-11
1999-10
1999-09
1999-08
1999-07
1999-06
1999-05
1999-04
1999-03
1999-02
1999-01
1998-12
1998-11
1998-10
1998-09
1998-08
1998-07
1998-06
1998-05
1998-04
1998-03
1998-02
1998-01
1997-12
1997-11
1997-10
1997-09
1997-08
1997-07
1997-06
1997-05
1997-04
1997-03
1997-02
1997-01
1996-12
1996-11
1996-10
1996-09
1996-08
1996-07
1996-06
1996-05
1996-04
1996-03
1996-02
1996-01
1995-12
1995-11
1995-10
1995-09
1995-08
1995-07
1995-06
1995-05
1995-04
1995-03
1995-02
1995-01

Month	G3 CH	G3 NA	G3 2x25	G3 4x5	G4 raw	G4 2x25	G4 4x5	G5 CH	G5 NA	G5 2x25	G5 4x5
1994-12
1994-11
1994-10
1994-09
1994-08
1994-07
1994-06
1994-05
1994-04
1994-03
1994-02
1994-01
1993-12
1993-11
1993-10
1993-09
1993-08
1993-07
1993-06
1993-05
1993-04
1993-03
1993-02
1993-01
1992-12
1992-11
1992-10
1992-09
1992-08
1992-07
1992-06
1992-05
1992-04
1992-03
1992-02
1992-01
1991-12
1991-11
1991-10
1991-09
1991-08
1991-07
1991-06
1991-05
1991-04
1991-03
1991-02
1991-01
1990-12
1990-11
1990-10
1990-09
1990-08
1990-07
1990-06
1990-05
1990-04
1990-03
1990-02
1990-01

Month	G3 CH	G3 NA	G3 2x25	G3 4x5	G4 raw	G4 2x25	G4 4x5	G5 CH	G5 NA	G5 2x25	G5 4x5
1989-12
1989-11
1989-10
1989-09
1989-08
1989-07
1989-06
1989-05
1989-04
1989-03
1989-02
1989-01
1988-12
1988-11
1988-10
1988-09
1988-08
1988-07
1988-06
1988-05
1988-04
1988-03
1988-02
1988-01
1987-12
1987-11
1987-10
1987-09
1997-08
1987-07
1987-06
1987-05
1987-04
1987-03
1987-02
1987-01
1986-12
1986-11
1986-10
1986-09
1986-08
1986-07
1986-06
1986-05
1986-04
1986-03
1986-02
1986-01
1985-12
1985-11
1985-10
1985-09
1985-08
1985-07
1985-06
1985-05
1985-04
1985-03
1985-02
1985-01