根据我国首次北极地区的考察观测资料,分析了北冰洋88°N～90°N考察路段上海冰形态和雪层剖面特征,划分出3种海冰形态类型和相应的积雪分布形式,指出了不同积雪分布形式下雪深测量、雪层剖面观测以及雪坑采样的适宜性。海冰上覆积雪的积消过程表现为缓慢的积累和快速的消融,雪深空间分布与降水来源有极大的关系。遥感监测和雪层剖面观测证明北冰洋海冰上覆积雪无明显“年积累”大于“年消融”的区域,属于季节性积雪.
Based on the observation of sea ice cover and measurement of snow depths and stratigraphies during China’s First North Pole Scientific Expedition (from Apr. 24 to May 6, 1995, Beijing time), three types of surface features of sea ice and correspondely three styles of snow distributions in the central Arctica are classified. It’s considered that the classification will help the siting of snow depth measurement, stratigaphic observation and snowpit sampling. The snow cover is slowly accumulated during the long Arctic winter, approximately from September to early May next year, while its ablation show abrupt from south to north. By the end of Augest, the snow cover is almost totally removed. The spatial distribution of snow depth is characterised by a south north decreasing trends, which is thought to result from the remote vapor sources, i.e., that the major vapor over the Arctic regions is transported from the mid latitude. The stratigraphy of the snowpits is characterised by the extensively existed depth hoar at the lower part of the pits, which is obviously a signal of the beginning of the long Arctic winter. The present of infiltered ice adhere to sea ice surface at the end of the ablation season indicate that the annual accumulation is approximately equals to the annual ablation near north pole.
1 Gloersen P and Campell W J.Recent variations in Arctic and Antarctic seaice covers.Nature,1991,352(4):33-35.
2 Piacsek S,A llard R,A Warn Varnas.St udies of the Arctic ice cover and upper ocean with a coupled ice ocean model.Journal of Geophisical Research,1991,96(C3):4631-4650.
3 Parkinson C L.Interannual variability of the spatial distribution of sea ice in the North Polar region.Journal of Geophysical Research,1991,96(C3):4791-4801.
4 Parkinson C L,Comiso J C,Zwal y H J et al..Arct ic sea ice,1973-1976:sat ellite passive microw ave observat ions. N A SA Spec.Publ.SP-489,1987,296pp.
5 Parkinson C L,Cavalieri D J.Arct ic sea ice 1973-1987 seasonal,regional and int erannual variability,Journal of geophysi cal Research,1989,94:14499-14523.
6 Gloersen P,Campell W J.V ariat ion in the Arct ic,Antarctic,and global sea ice covers during 1978-1987 as observed with the Nimbus-7 SM M R.Journal of Geophysical Research,1988,93(C9):10666-10674.
7 Hanson A M.T he snow cover of sea ice during the Arctic Ice Dynamics Experiment,1975-1976.Arctic and Alpine Research,1980,12(2):215-226.
8 Barry R G.Arctic ocean ice and climat e:perspectives on a century of polar research.Annuals of the Association of American Geographers,1983,73(4):485-501.
9 Buzuev A Y a,Romanov I P,Fedykov V E.V ariability of snow distribut ion on Arctic ocean ice.Soviet Met eorology and Hydrology,1979,9:975-964.
10 Loshchilov V S.Snezhnyi pokrov na 1 daht sent ral noi Arkt iki.Problemy Arktikii A ntarktiki,1964,17:36-45.
11 Y anes A V.M elt ing of snow and ice in the cent ral A rct ic.In:Problems of the Arctic and A ntarctic,N o.11,ed.N.A. O stenso pp.1-13.Arctic Institite of North A merica,1966.
12 Marshunova M S,Chernigovskii N T.R adiation regime of the foreign A rctic(Gidromet eorologicheskoe Izdatel stvo, Leningral,1971).National Science Foun dation,Technical Translation,1978,72-51034.
13 李培基.北极海冰与全球气候变化.冰川冻土,1996,18(1):72~80.
14 Shumskii P A.Knucheniiu 1 dov severnogo ledovitogo okeana(A study of ice on the Arctic Ocean).Vestnik Akad Nauk SSSR,1995.25(2):33-38.
15 秦大河.南极冰盖表层雪内的物理过程和现代气候及环境记录.北京:科学出版社,1995.202.
