THE AERODYNAMIC ROUGHNESS OF DIFFERENT TYPES OF SEA ICE

被引:90
作者
GUEST, PS
DAVIDSON, KL
机构
关键词
D O I
10.1029/90JC02261
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
The aerodynamic roughness for all major types of sea ice is specified on the basis of surface layer measurements from ship and ice floe platforms. Median neutral surface drag coefficients, C(dn) x 1000, for grease and nilas ice are 0.7 and 1.6. Small, medium, large, and fused pancake ice have C(dn) equal to 0.9, 1.6, 2.4, and 1.9. Young ice C(dn) ranges from 2.3 to 3.1. Very smooth first-year or multiyear ice with no pressure ridges has C(dn) equal to 1.5. Pack ice has median values of 2.0 and 2.2 for first-year and multiyear ice. Marginal ice zone ice averages 3.1 and 3.4 (first-year, multiyear) if unaffected by wave action. Wave-affected ice has C(dn) values of 4.2 and 4.6 (first-year, multiyear). Extremely rough multiyear ice in intense shear or compaction regions has C(dn) equal to 8.0. Open ocean areas within 100 km of an ice edge averaged 1.8, while ice-free water downwind of ice, with small or no waves is 1.4. These values can be adjusted if heat fluxes are present. The accuracy of the C(dn) averages is estimated to be 20% or better.
引用
收藏
页码:4709 / 4721
页数:13
相关论文
共 26 条
[2]   A SIMPLE BOOM ASSEMBLY FOR THE SHIPBOARD DEPLOYMENT OF AIR SEA INTERACTION INSTRUMENTS [J].
ANDREAS, EL ;
RAND, JH ;
ACKLEY, SF .
OCEAN ENGINEERING, 1984, 11 (03) :227-237
[3]  
BLANC TV, 1985, J PHYS OCEANOGR, V15, P650, DOI 10.1175/1520-0485(1985)015<0650:VOBDSF>2.0.CO
[4]  
2
[5]   CHARACTERISTICS OF OVER-WATER SURFACE STRESS DURING STREX [J].
BOYLE, PJ ;
DAVIDSON, KL ;
SPIEL, DE .
DYNAMICS OF ATMOSPHERES AND OCEANS, 1987, 10 (04) :343-358
[6]  
Dyer A. J., 1974, Boundary-Layer Meteorology, V7, P363, DOI 10.1007/BF00240838
[7]  
FAIRALL CW, 1990, J ATMOS OCEAN TECH, V7, P425, DOI 10.1175/1520-0426(1990)007<0425:IDASFM>2.0.CO
[8]  
2
[9]   MESOSCALE VARIATIONS IN SURFACE STRESS, HEAT FLUXES, AND DRAG COEFFICIENT IN THE MARGINAL ICE-ZONE DURING THE 1983 MARGINAL ICE-ZONE EXPERIMENT [J].
FAIRALL, CW ;
MARKSON, R .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1987, 92 (C7) :6921-6932
[10]  
FAIRALL CW, 1986, BOUND-LAY METEOROL, V34, P515