served by the International Gravimetric Bureau (IGB) of the Federa- 

 tion of Astronomical and Geophysical Services (FAGS). TAG also 

 includes the Commission on Recent Crustal Movements (CRCM), which, 

 in 1976, began the International Center on Recent Crustal Movements 

 (ICRCM) in Prague. CRCM has proposed the establishment of a World- 

 wide Geometrical Position Reference Network. 



110. INTERNATIONAL ASSOCIATION OF GEOMAGNETISM AND AERONOMY: lAGA 

 Included in lAGA is the World Magnetic Survey Board or WMSQ, 



responsible for the World Magnetic Survey (WMS). 



111. INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES: lAHS 

 Formerly called the International Association of Scientific 



Hydrology (lASH), lAHS has among its commissions the International 

 Commission of Snow and Ice (ICSI), which sponsors many programs 

 relating to he study of sea ice, including the AIDJEX project and 

 the Baffin Bay-North Water Project. Another is the International 

 Commission on Water Quality (ICWQ), formerly the International 

 Hydrochemical Commission (IHC). 



112. INTERNATIONAL ASSOCIATION OF METEOROLOGY AND ATMOSPHERIC 

 PHYSICS: lAMAP 



lAMAP cooperates with the World Meteorological Organization on 

 the International program known as Global Atmospheric Research Pro- 

 gram (GARP). Included in lAMAP are three commissions of interest: 

 the Commission on Atmospheric Chemistry and Global Pollution (CACGP) 

 which is concerned with the transport of pollutants from the atmos- 

 phere to the ocean; the International Advisory Commission on Marine 

 Sciences (lACOMS); and the International Commission on Polar Meteor- 

 ology (ICPM). 



A proposal to change its name to the International Association for 

 Atmospheric Science (lAAS) is being considered. 



113. INTERNATIONAL ASSOCIATION FOR THE PHYSICAL SCIENCES OF THE 

 OCEAN: lAPSO 



Established in 1931 as the International Association of Physi- 

 cal Oceanography (lAPO), lAPSO assumed the functions of the Oceano- 

 graphic Section of lUGG originally established in 1919. In 1967, in 

 recognition of the broad spectrum of oceanography, which includes 

 chemical and geological sciences as well as the physical sciences. 

 Its name was changed to the International Association for the Physi- 

 cal Sciences of the Ocean and its functions were broadened to reflect 

 the changes. lAPSO's fundamental components are the Commissions on 

 Marine Geophysics, Marine Chemistry, and Physical Oceanography. It 

 also includes a Committee on Tides and Mean Sea Level, which serves 

 as the scientific adviser to the Permanent Service for Mean Sea 

 Level (PSMSL). The Committee on GEBCO which served as the scientific 

 adviser to the International Hydrographic Organization (IHO) has been 

 abolished and is now the responsibility of a Joint lOC/lHO Guiding 

 Committee for GEBCO. When needed, lAPSO establishes working groups 

 to explore specific questions. Together with lAMAP it has formed a 

 Joint lAMAP-IAPSO Committee on Air-Sea Interaction. 



114. INTERNATIONAL ASSOCIATION OF SEISMOLOGY AND PHYSICS 

 OF THE EARCH'S INTERIOR: lASPEI 



Founded in 1901, lASPEI collects and disseminates data on earth- 

 quakes, tsunamis and other oceanic waves of seismic origin, gravity 

 anomalies, and related topics. 



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