This table is created from the Tbl_2.txt, Tbl_3.txt and Tbl_4.txt files as
prepared by INSROP Project I.4.2 as part of INSROP Phase 2. The table records
refer to ship route segments included in the Tbl_1 shapefile set, which is a part
of the dataset provided by INSROP Project I.4.2. These segments are an extract
of the ship routes as defined in INSROP Working paper no. 108 (1998), prepared
by Work Package 1 (Box B) as part of INSROP Phase 2.
2.1. Ice concentration
The frequency of occurrence of different ranges of total ice concentration was
calculated on the basis of monthly averaged observation data for the period
1953 to 1994 for each of 20-mile segments in the segments selected in WP1
Project. The initial information for the period 1953 to 1979 period was obtained from
airborne ice observation data, for the period 1980 to 1990 from airborne ice
and satellite observations and for the period 1991 to 1994 from satellite
observation data.
The probabilistic estimates for month of the year were obtained for five
concentration ranges: 0, 1-3; 4-6; 7-8 and 9-10 (tenths).
Path: <NSR_DATA>\icesnow\i_4_2
Table type: DText table.
* Ice concentration - Frequency of occurrences
3288 records, 9 descriptive fields.
Fields: [<Name>] -- <Alias> (type of field)
[No] -- "No" (Numeric, no decimals)
[Point_id] -- "Point No." (Numeric, no decimals)
[Month] -- "Month" (Numeric, no decimals)
[Num_obs] -- "Number of observations" (Numeric, no decimals)
[Conc_0_0] -- "Open water" (Numeric, 1 decimal)
Ice concentration range
[Conc_1_3] -- "1/10 - 3/10" (Numeric, 1 decimal)
Ice concentration range
[Conc_4_6] -- "4/10 - 6/10" (Numeric, 1 decimal)
Ice concentration range
[Conc_7_8] -- "7/10 - 8/10" (Numeric, 1 decimal)
Ice concentration range
[Conc_9_10] -- "9/10 - 10/10" (Numeric, 1 decimal)
Ice concentration range
Ice concentration - Frequency of occurrences