摘要:

Space exploration has contributed considerably to knowledge of the heliomagnetosphere, the region encompassed by the Sun's magnetic field, and a proposed mission would clarify the understanding of some of the features and processes in this very dynamic region. To comprehend how future exploration will help to chart the heliomagnetosphere, however, one must begin with a basic understanding of the Sun's characteristics.

ISSN:0002-8606    

DOI:10.1029/90EO00325

年代:1990

数据来源: WILEY

摘要:

Seymour O. Schlanger, the William Deering Professor of Geology at Northwestern University, Evanston, Ill., died June 30, 1990. Sy's work profoundly affected many areas of Earth science, including globally distributed Cretaceous black shales and their implications for paleoceanography, the subsidence history of oceanic volcanos as revealed by the diagenesis of carbonates drilled and dredged on Pacific atolls and guyots, reef facies as semiquantitative indicators of paleolatitude, the timing of (Cretaceous) Pacific oceanic volcanism, and tests of and alternatives to the fixed‐hotspot hypothesis. Sy was also well known to fellow AGU members for his organizational and intellectual contributions to the Deep Sea Drilling project and its successors. Sy participated in or led four legs and was founding chairman of the Joint Oceanographic Institutions/U.S. Science Advisory Committee (USSAC

ISSN:0002-8606    

DOI:10.1029/90EO00326

年代:1990

数据来源: WILEY

摘要:

Definition and summary of the state of knowledge of the role the polar regions play in global change was the aim of the International Conference on the Role of the Polar Regions in Global Change held at the University of Alaska Fairbanks, June 11–15, 1990. Cosponsors included AGU, American Meteorological Society, Arctic Institute of North America, Arctic Research Commission of the U.S., Arctic Research Consortium of the United States, International Glaciological Society, Oceanography Society, and Scientific Committee on Antarctic Research of the International Council of Scientific Union

ISSN:0002-8606    

DOI:10.1029/90EO00331

年代:1990

数据来源: WILEY

摘要:

AGU signed an agreement on October 1 with the International Union of Radio Science (URSI) to cosponsor AGU's journalRadio Science. Under the agreement, URSI will provide opportunities at its meetings for AGU to promote the journal, while AGU will retain financial and administrative responsibilities for the publication. AGU's president will also continue to appoint the journal's editor under AGU procedure, and the editor will retain decision‐making responsibility on the journal's substance, although the URSI board will be consulted in the editor searc

ISSN:0002-8606    

DOI:10.1029/EO071i044p01759-01

年代:1990

数据来源: WILEY

摘要:

The traverse from Lhasa to Zham at the Chinese border with Nepal, along the Tsangpo valley and through the Himalaya, is one of the most marvelous of geological field trips. The journey takes a minimum of 3 days by car on adequate, mostly dirt, roads. Roadside outcrops reveal much of what happened between the opening of a part of the Neotethyan ocean about 250 m.y. ago, and the collision of India with Asia 200 m.y. later. The building of the world's highest mountain chain as a result of the collision has exposed rocks from the seafloor and beneath in thousands of superb outcrops, and in the clear, thin air of the high altitudes, impressive geological structures are laid out on remote mountainsides.

ISSN:0002-8606    

DOI:10.1029/90EO00327

年代:1990

数据来源: WILEY