Climate Modelling Group
School of Earth and Ocean Sciences

Climate Research Network

Collaborative Research Agreement at the University of Victoria on Behalf of the Canadian Institute for Climate Studies and Environment Canada (#11 CICS-Global Oceans)

Principal Investigator: Andrew Weaver

Progress Report: January 1, 1996

1. Principal Investigator

Andrew Weaver

2. Institution

School of Earth & Ocean Sciences
University of Victoria
PO Box 1700
Victoria, BC, V8W 2Y2

3. Details of Projects

The purpose of the #11 CICS -- Global Oceans grant is to allow Dr. A. Weaver to participate in the continued development of the Canadian Climate Centre (CCC) coupled atmosphere-ocean model and to act as the Scientific Leader of the Ocean Modelling Division of the CCC. In order to accomplish these tasks research grant money is requested to provide secretarial support (Wanda Lewis), teaching relief (Rolf Lueck), Computer Programming Support (Michael Eby) and minor operating expenses. These three people have all been appointed.

A copy of my progress reports are available on the world wide web at:

3.1 Global Ocean Modelling

Development of the global ocean model continued during this period. In particular, annual and seasonal experiments with the isopycnal and Gent-McWilliams formulations of sub-grid-scale mixing (which can replace convection in regions of steeply-sloping isopycnals) were completed. Due to the existence of an interesting numerical problem the resulting equilibrium climatologies were not completely satisfying. Michael Eby has developed a simple, idealized basin model to investigate this problem more closely. It appears to be related to grid Peclet violations which exist when isopycnal or Gent-McWilliams formulations are used for sub-grid scale mixing. The incorporation of flux-corrected transport schemes alleviates these problems and so future experiments will most likely employ this new advection algorithm. We are presently writing up a manuscript to document our findings.

In addition, we now have the GFDL coupled atmosphere-ocean climate model up and running on our local workstation cluster. This model is far more computationally efficient than the CCC coupled model. It is being used to investigate questions concerning climate variability in the coupled system. These experiments are analogous and complementary to those which will be performed with the CCC coupled model. It is hoped that the insight we gain from the computationally efficient GFDL coupled model will allow us to better streamline the experiments we perform with the more sophisticated CCC coupled model.

3.2 The Canadian Climate High Resolution OGCM

Collaboration with Warren Lee and other researchers in the Canadian Climate Centre has continued. At present, a simplified version of the CCC OGCM has been developed for the purpose of undertaking test simulations. In addition, a new ocean spin-up has been completed and this ocean model has been coupled to the CCC AGCM II to undertake climate change studies. These ocean models have now been frozen and we are currently writing up a manuscript discussing the climatology and sensitivity analysis of the global model.

4. Budget request for the 1995-96 fiscal year:

The budget request remains unchanged from the original request. This original request is detailed below.

1) Continued partial support for a secretary (Ms. Wanda Lewis) $10,000
2) Continued sessional teaching replacement (Dr. Rolf Lueck) $15,000
3) Partial support for one scientific computing Research Associate (Michael Eby) $30,000
4) Operating and Media Costs $10,000
Total: $65,000

If possible, an additional $30,000 would be most useful in allowing us to upgrade our computing facilities.
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