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Global Model Evaluation

IGAC/SPARC Chemistry-Climate Model Initiative (CCMI) working group on improved evaluation of chemistry-climate models using in-situ research aircraft data


Members of the working group:

Ken Aikin (NOAA)
Gao Chen (NASA)
Ron Cohen (UC Berkeley)
Jim Crawford (NASA)
Louisa Emmons (NCAR)
David Fahey (NOAA)
Klaus-Dirk Gottschaldt (DLR)
Heidi Huntrieser (DLR)
Jean-Francois Lamarque (NCAR)
Hans Schlager (DLR)
Martin Schultz (FZ J├╝lich)
Hiroshi Tanimoto (NIES)
Simone Tilmes (NCAR)

Veronika Eyring - (DLR) Co-chair, CCMI

Tom Ryerson - (NOAA) Working group leader for in-situ aircraft measurements

This working group addresses the following tasks:

  • Develop a methodology to evaluate global CCM simulations using integrated in-situ observations from research aircraft.
  • Improve online access to observational datasets that have been evaluated for quality and formatted for consistency to facilitate model-data intercomparison studies.
  • Develop diagnostics to identify composite datasets with climatological value and provide these formatted datasets to the community.
  • Report analyses on the CCMI Observations for model evaluation.

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More information: Chemistry-Climate Model Initiative (CCMI)

Airborne data

WP-3D flight tracks

NOAA ESRL Chemical Sciences Division data

NOAA WP-3D flights from chemically-instrumented field missions conducted from 1999 through 2010 in the contiguous United States and Alaska.

Altitude range: surface to 7 km.

DC-8 flight tracksP-3B flight tracks

NASA Tropospheric Chemistry data

NASA DC-8 and P-3B aircraft data from field missions conducted from 1987 through 2011.

Altitude range: Surface to 12 km (DC-8)
Surface to 7 km (P-3B).

DLR Falcon flight tracks

DLR Falcon data

Data from DLR Falcon aircraft conducted from 2001 to 2012.

Altitude range: Surface to 12 km.

HIPPO flight tracks


The HIPPO (HIAPER Pole-to-Pole Observations) study of the carbon cycle and greenhouse gases measured meteorology, atmospheric chemistry, and aerosol constituents along transects from approximately pole-to-pole over the Pacific Ocean using the NSF/NCAR GV aircraft. Five missions took place in different seasons from 2009 through 2011.

Altitude range: Surface to 15 km.

C-130 flight tracks

NCAR / NSF INTEX-B / Milagro data

The NSF/NCAR C-130 participated in two projects in the spring of 2006 in conjuction with NASA: INTEX-B based in Mexico City, and IMPEX based in Seattle, WA.

Altitude range: Surface to 8 km.

START08 flight tracks


Stratosphere-Troposphere Analyses of Regional Transport (START08) studied the chemical and transport characteristics of the extratropical upper tropospheric and lower stratospheric region using the NSF/NCAR GV research aircraft. A total of 18 flights were conducted in the United States and Canada during April, May and June 2008.

Altitude range: Surface to 15 km.