Environmental Forecasting Program 



Long-range and accurate environmental forecasting re- 

 quire knowledge of the processes and mechanisms at work in 

 the oceans and the atmosphere. The Environmental Forecasting 

 Program focuses on projects designed to explain the coupling 

 between the ocean and atmosphere and the influence of the 

 oceans on weather and climate. Experiments and studies include: 

 the Midocean Dynamics Experiment (MODE); the North Pa- 

 cific Experiment (NORPAX) ; the International Southern Ocean 

 Study (ISOS); and the Climate — Long-Range Investigation, 

 Mapping, and Prediction (CLIMAP) Study. All of these are 

 being conducted by UNESCO's Intergovernmental Oceano- 

 graphic Commission. 





MODE 



Midocean Dynamics Experiment (MODE) 



The purpose of MODE is to establish the dynamics and 

 statistics of mesoscale motions in the ocean, their energy source, 

 and their role in the general circulation. The experiment is 

 jointly funded by the National Science Foundation IDOE and 

 U.S. Navy Office of Naval Research (ONR). It consists of 

 coordinated research projects that range from field investiga- 

 tions through theoretical studies. 



MODE-0 and MODE-1 



MODE began in July 1971. MODE-O included prelim- 

 inary studies for planning purposes, formulation of theoretical 

 models and schemes for objective analyses, as well as field trials 

 and preliminary field experiments at the MODE site (28"N, 

 69°40'W) south of Bermuda near the Tropic of Cancer. 

 MODE-1, the main field experiment, was conducted during the 

 spring and summer of 1973 in this region. The MODE-1 pro- 

 gram is described in International Decade of Ocean Explora- 

 tion Progress Report Volume 3: April 1973 to April 1974. 

 Results of MODE-1 are being published in scientific journals 

 and are summarized in three reports: MODE-1 Data Inventory, 

 Instrument Description and Intercomparison Report; Dynamics 

 and the Analysis of MODE-1; and an Atlas of tJie MODE-1 

 Data, which is complete in draft form and will be corrected and 

 recompiled during the next 2 years. The accompanying sum- 

 maries identify MODE data submitted to NOAA Environmental 

 Data Service's National Oceanographic Data Center. 

 NODC Accession No.: 75-00133 

 Organization: Woods Hole Oceanographic Institution 

 Investigator: A. Voorhis 

 Grant No.: GX-30220 



MODE data: Fixe magnetic tapes containing launch and 

 recovery, temperature, pressure, float and water velocity data 

 collected. April 7 to June 11, 1973. 



NODC Accession No.: 75-00724 

 Organization: Harvard University 

 Investigator: A. R. Robinson 

 Grant No.: GX-29033 



MODE data: 104 analog copies of XBT traces from Leg 5 

 of the RV Chain cruise 112, June 6 to 13, 1973. (Data are 

 available in digital form.) 



NODC Accession No.: 74 00845 



Organization: Massachusetts institute of Technology 



Investigator: C. Wunsch 



Grant No.: GX-29034 



MODE data: One magnetic tape containing 53 files of 

 temperature and pressure. Maximum data points = 7,920 per 

 file. March to July, 1973. 



NODC Accession No.: 74-00662 

 Organization: Yale University 

 Investigator: T. Rossby 

 Grant No.: GX-30416 



MODE data: One magnetic tape containing positional data 

 from SOFAR floats — 4,555 data days (maximum of 6 fixes per 

 day; maximum number of floats =20). September 28, 1972 

 to April 30, 1974. 



POLYMODE 



The United States and the Soviet Union are developing a 

 large-scale midocean dynamics experiment, POLYMODE. It 

 is based on the U.S.S.R. POLYGON program — a continuing 

 series of experiments by Soviet scientists investigating meso- 

 scale phenomena in the Atlantic and Pacific Oceans and in the 

 Arabian Sea — and the MODE program of the United States 

 and the United Kingdom. The POLYMODE experiment is 

 under the direction of a Joint U.S.-U.S.S.R. POLYMODE 

 Organizing Committee, established under the Agreement be- 

 tween the Governments of the United States and the Union of 

 Soviet Socialistic Republics on Cooperation in Studies of the 

 World Ocean. 



POLYMODE Field Activities. Scientific objectives of 

 POLYMODE are to: 



1 ) Study the eddy field and eddy-eddy interactions over long 

 time and large space scales; 



2) Determine local dynamic balances in a typical region; 



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