摘要:

Geophysical disasters hit the headlines almost daily. Storms, floods, earthquakes, tsunamis, and volcanic eruptions annually take a high toll and destroy many works of man. They outmatch such scourges as epidemics and perhaps even hunger. The study of these natural phenomena undoubtedly gave much impetus to geophysics in its early days as a science.Considerable progress has been made in forecasting some of these events and in mitigating their effects. The meteorological and hydrological disasters offer fewer surprises now than they did only a few decades ago. The cataclysms of the solid Earth have, however, remained intractable. In spite of vastly greater understanding of their causes only limited progress has been made in preventing the live burial of the population of whole towns. Superior engineering methods to improve construction are used in advanced economies. They are palliative but in many areas have yet to be put to a full test by events that may occur only once or twice a century. But even in that direction much remains to be done in many countries, as recent events in Iran, Turkey, and Central America have shown. Even in the United States we have just skirted the fringe of disaster, as the great Alaska earthquake of 1964 showed.

ISSN:0002-8606    

DOI:10.1029/TR049i004p00607

年代:1968

数据来源: WILEY

摘要:

Few researchers in their lifetimes have contributed as much to our environmental science as Professor Sydney Chapman. This year, marking his 80th birthday, brings his 58th year of publications to a total of more than 450 papers in fields of interest to upper atmosphere, solar‐terrestrial, and space physicists. Since the activity of this prolific writer has continued through so many sunspot cycles, it is possible to compare the Sun's level of disturbance with Professor Chapman's output.In Figure 1 are graphs of the yearly number of Chapman publications [Akasofu et al., 1967] from 1910 through 1967 and the concurrent yearly means of sunspot relative numbers [Waldmeier, 1961, 1967]. This covers a little over 5 solar cycles. Three items are noteworthy here. The publication number seems to rise and fall in cycles similar to the sunspots. There appears to be a slight delay of the publications behind the sunspots. The gradual growth of the maxima over the years is reflected in both trace

ISSN:0002-8606    

DOI:10.1029/TR049i004p00609

年代:1968

数据来源: WILEY

摘要:

In view of the specialized theme of this Institute, the book's title is somewhat misleading; nevertheless, the book contains much that will interest aeronomists and communication engineers in general. There were several forerunners of this Institute, which led to the publication of more appropriately titled books, including the two‐volume proceedings of an AGARD Symposium held in Oslo in 1956,Polar Atmosphere Symposium, edited by K. Weekes, Pergamon, 1957, and the proceedings of an AGARD Symposium held in Athens in 1963,Arctic Communications, edited by B. Landmark, Pergamon, 1964. Interestingly, these earlier publications are not mentioned in the current volum

ISSN:0002-8606    

DOI:10.1029/TR049i004p00611

年代:1968

数据来源: WILEY

摘要:

The Environmental Data Service, a component of ESSA, has microfilmed most of the geophysical data, in such areas as bathymetry, magnetics, and gravity, gathered during the 1967 global cruise of the U. S. Coast and Geodetic Survey ShipOceanographer. Copies of these data as well as reduced geophysical data from the USC&GSSPioneer's1964 International Indian Ocean Expedition and the USC&GSSSurveyor's1966 West Coast Upper Mantle Project may be obtained by writing to Earth Sciences Division, Environmental Data Service, ESSA, 8060 13th Street, Silver Spring, Maryland 20910.

ISSN:0002-8606    

DOI:10.1029/TR049i004p00620

年代:1968

数据来源: WILEY

摘要:

It is not too late to attend the National Fall Meeting of the American Geophysical Union. It will be held December 2–5, 1968, at the San Francisco Hilton Hotel, San Francisco, California. An interesting commercial and educational exhibit is planned.The American Geophysical Union will hold its Fiftieth Annual Meeting at the Sheraton‐Park Hotel and the Shoreham Hotel in Washington, D. C., April 21–25 (Monday through Friday), 1968. URSI will hold its meeting during this interval and in the same hotels in full cooperation with AGU. Some special events in honor of the golden anniversary are planned, Sessions will be planned for all ten Sections. Members and nonmembers are invited to submit papers for consider

ISSN:0002-8606    

DOI:10.1029/TR049i004p00626

年代:1968

数据来源: WILEY

摘要:

Everyone attending the Fall Meeting must register. The registration desk and information center are located in the East Lounge opposite Continental Parlor 4. Registration will open Sunday afternoon, December 1, and will be open throughout the meeting from 08h to 17h. Registration fees at the meeting are: members, $12; student members, $6; nonmembers, $15.

ISSN:0002-8606    

DOI:10.1029/TR049i004p00629

年代:1968

数据来源: WILEY