عنوان

Polar icebreakers in a changing world :

شابک

0309665310

شابک

9780309665315

شماره

b615339

عنوان اصلي

Polar icebreakers in a changing world :

نام عام مواد

[Book]

ساير اطلاعات عنواني

an assessment of U.S. needs

نام نخستين پديدآور

Committee on the Assessment of U.S. Coast Guard Polar Icebreaker Roles and Future Needs, Polar Research Board, Division on Earth and Life Studies; Marine Board, Transportation Research Board, National Research Council of the National Academies.

محل نشرو پخش و غیره

Washington, DC

نام ناشر، پخش کننده و غيره

National Academies Press

تاریخ نشرو بخش و غیره

©2007.

نام خاص و کميت اثر

(xii, 122 pages) : illustrations (some color), maps

متن يادداشت

Introduction --; U.S. strategic interests and missions in the polar regions --; Arctic environmental change and potential challenges --; Polar science's key role in earth system science --; U.S. Coast Guard roles and missions --; U.S. polar icebreaker fleet --; Icebreaking environments and challenges to the U.S. fleet --; Analysis of alternatives for USAP resupply --; Analysis of U.S. current and future polar icebreaking needs --; Options for acquiring new polar icebreaking services --; Findings and recommendations.

متن يادداشت

The United States has enduring national and strategic interests in the Arctic and Antarctic, and the importance of these regions is growing with time. In the north, the United States has territory and citizens above the Arctic Circle, creating significant national interests. In the south, the United States maintains three year-round scientific stations to assert U.S. presence and ensure U.S. leadership among the nations that are signatories to the Antarctic Treaty. The United States uses this leadership to ensure that the Antarctic Treaty area, comprising all land and waters below 60 degrees South latitude, is preserved for peaceful purposes and scientific research. Antarctica is an ice-covered continent surrounded by an ocean, parts of which are seasonally ice covered. The central Arctic Ocean is perpetually ice covered, and in the winter ice extends along the northwestern Alaskan coast and south through the Bering Strait. Asserting national interests and achieving national purposes in both polar regions requires polar icebreakers, ships capable of operating in a variety of challenging ice conditions. Over the past several decades, the U.S. government has supported its polar interests with a fleet of four icebreakers. Three of these, including the world's most powerful nonnuclear icebreakers, POLAR SEA and POLAR STAR, and the modern research icebreaker HEALY, have been operated by the U.S. Coast Guard. These three ships are designed to support U.S. Coast Guard missions and to support science.

موضوع مستند نشده

Ice breaking operations -- Polar regions.

موضوع مستند نشده

Icebreakers (Ships) -- United States.

موضوع مستند نشده

United States. -- Coast Guard -- Ice breaking operations.

شماره رده

نشانه اثر

مستند نام اشخاص تاييد نشده

Committee on the Assessment of U.S. Coast Guard Polar Icebreaker Roles and Future Needs, Polar Research Board, Division on Earth and Life Studies; Marine Board, Transportation Research Board, National Research Council of the National Academies.

مستند نام اشخاص تاييد نشده

National Research Council (U.S.). Committee on the Assessment of U.S. Coast Guard Polar Icebreaker Roles and Future Needs.

نام الکترونيکي

نوع ماده

[Book]

تكميل شده

Y