Chinese surnames are used by Han Chinese and Sinicized ethnic groups in Mainland China, Hong Kong, Macau, Malaysia, Taiwan, Korea, Singapore, Vietnam and among overseas Chinese communities. In ancient times two types of surnames existed, namely xing (Chinese: å§; pinyin: xÃ¬ng) or lineage names, and shi (Chinese: æ°; pinyin: shÃ¬) or clan names.
An ice sheet is a large permanent layer of ice covering a continental shelf, defined as having an extent greater than 50,000 km2 (19,305 mi2). An ice sheet is larger than a glacier or ice shelf.
The Arctic isn't quite as cold as Antarctica, and here are some reasons why: A massive ice sheet covers almost all of the Antarctic continent. Although glaciers are common in the Arctic, Greenland has the only permanent ice sheet, but it's only about 1/8 the size of the Antarctic ice sheet.he ice cap over the Arctic Ocean is always moving because of the winds above it and the ocean currents beneath it. This movement causes large cracks (called leads) to open up-even in winter-and this allows ocean heat to escape into the air. Land loses heat faster than water.