PSD Staff List  »  Chesley Mccoll
Chesley Mccoll – Research Scientist
Dynamics and Multiscale Interactions Team
Affiliation: CIRES
Phone: (303) 497-6222
Mailing Address:
NOAA/ESRL Physical Sciences Division
325 Broadway
Boulder, CO 80305

Fax: (303) 497-6020


This past year I have been involved with many projects and scientists, which include the following, for the Climate Analysis group:

Utilized the NCEP Global Forecast System spectral model to run a 56 member AMIP-style analysis (AMIP.v2c) from 1831-2011 using 18 different realizations of the sodasi.2c sea surface temperature members, the Hadley sea ice, and CO2 forcings.

Created two different climatology runs, using the NCEP GFS model, and year 2000 forcings. One climatology used the same ice model used in the 20CR v2 run. The other run used the updated Hadley sea ice model for comparison to the current 20CRv3.

Analyzed of the Atlantic Meridional Overturning Circulation (AMOC) dynamics for two different CMIP5 models, ESM2M and CCSM4. This analysis used monthly CMIP5 data that was annually averaged, to study the roles of the geostrophic component (stream function minus the Ekman component), surface fresh water flux and surface heat flux in the interannual evolution of the AMOC.

Studied of the tropical sea surface temperature trends. Two trend analysis techniques were employed, linear trend and decadal differences, for 4 different observational SST datasets (COBE2, Hadley,ERv3b, SODAsi.2c) and 121 CMIP5 historical model runs. Using the mean longitudinal (ocean only) anomalies, Taylor diagrams where then generated using the ratio of the various models variances and their correlation values. A supplementary study of the average climatology of the CMIP5 runs compared to the average climatology of the 4 Observational datasets was also performed for three different time periods 1874-2012, 1874-1947, 1948-2012.

Completed further post processing of the AMIP-style model (AMIP.v2c) for a wide variety of levels of geopotential heights, temperatures, precipitation and wind for future analysis.

Developed the International Surface Pressure Databank version 4. Which incorporated additional new data for stations, ships and International Best Track Archive for Climate Stewardship, and also supplemental ship observations obtained from ACRE, and Weather detectives starting from the early 1800's.

Contributed to a paper documenting the International Surface Pressure Databank version 2 (ISPDv2). This included an analysis of the average number of pressure observations per day contained in the ISPDv2 and compared that to last years updated ISPDv3. And an analysis of the number of observations in the Northern Hemisphere and Southern Hemisphere, and the additional observations gained in ISPDv3.


  • M.Sc., Aerospace Engineering, University of Colorado, Boulder, 1989
  • B.Sc., Aerospace Engineering, University of Colorado, Boulder, 1985

Research Interests