2010 Defra MB0106 Atlas Tide Resources
Tidal data supplied by Proudman Oceanographic Laboratory (POL) on behalf of BERR for the Atlas of UK Marine Renewable Energy Resources project. This layer contains the primary tidal data attributes from the Atlas database. This dataset includes information about Flow, Power and Tidal Range for the area of the UK Continental Shelf. All data recorded 2001 to 2007. Refer to 2008 technical report for Atlas update.
dataset
MB0106000000027
http://randd.defra.gov.uk/default.aspx
eng
urn:ogc:def:crs:EPSG::4326
http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=16415
structure
revision
2008-01-06
revision
2009-11-16
-9.6005
3.3977
61.4994
48.4260
revision
2010-01-01
unknown
2010-01-01
2010-12-31
publication
2010-12-31
creation
2010-01-01
revision
2010-12-31
notPlanned
Column Heading,Column Alias,Notes POL_Cord_i,Model I Coordinate,Co-ordinate system for models used internally at POL POL_Cord_j,Model J Coordinate, LAT,Latitude,Latitude and longitude of the centre of the model grid cell LONG_,Longtitude, Model_ID,Model Identifiyer,A single character code indicating which model was used as the source of the information. C=CS3 ; N=NEA ; H=CS20 High Resolution model Depth,Depth,Depth (MSL) Data_Depth,Data Depth,The position of the data values computed above the seabed - this will be dependent on which sigma level was selected. Uses the non-rounded depth values, and not the rounded ones from column 6) MEAN_S_RNG,Mean Spring Range,Mean Spring Range and Mean Neap Range. Computed from the harmonics M2 and S2 using the formula: MSR= 2(M2+S2 ) MNR= 2(M2-S2 ) MEAN_N_RNG,Mean Neap Range, Tide_Age,Tide Age,The age of the tide is the average time delay (in hours) from the full or new moon to the point of spring tides. For UK waters, this value is typically between 36 and 60 hours. Computed directly from harmonic constituents using the formula: TYPE_TIDE,Type of Tide,The type of tide gives an indication of the type of tidal regime at the location. A value of less than 0.25 indicates a semi-diurnal tide ; 0.25 to 1.5 is a mixed tide (mainly semidiurnal) ; 1.5 to 3.0 is a mixed tide (mainly diurnal) ; more than 3.0 indicates diurnal tides. The Age of tide parameter becomes less reliable when this value exceeds 0.5. M2_SEMI_MJ,M2 Ellipse - Semi-Major Axis, The five ellipse parameters for the M2 constituent in the following order: * Semi-major axis * Semi-minor axis * Orientation (clockwise from north) * Phase of the ellipse * Rotation direction (C=clockwise, A=anticlockwise, X=undefined) An undefined rotation means the flow is probably very small and very linear and it does not clearly rotate in one direction. This tends to happen more with the smaller diurnal constituents O1 and K1, and more rarely with M2. M2_SEMI_MI,M2 Ellipse - Semi-Minor Axis, M2_ORIENT,M2 Ellipse - Orientation, M2_PHASE,M2 Ellipse - Phase of the Ellipse, M2_ROTATE,M2 Ellipse - Rotational Direction, S2_SEMI_MJ,S2 Ellipse - Semi-Major Axis, S2_SEMI_MI,S2 Ellipse - Semi-Minor Axis, S2_ORIENT,S2 Ellipse - Orientation, S2_PHASE,S2 Ellipse - Phase of the Ellipse, S2_ROTATE,S2 Ellipse - Rotational Direction, O1_SEMI_MJ,O1 Ellipse - Semi-Major Axis, O1_SEMI_MI,O1 Ellipse - Semi-Minor Axis, O1_ORIENT,O1 Ellipse - Orientation, O1_PHASE,O1 Ellipse - Phase of the Ellipse, O1_ROTATE,O1 Ellipse - Rotational Direction, K1_SEMI_MJ,K1 Ellipse - Semi-Major Axis, K1_SEMI_MI,K1 Ellipse - Semi-Minor Axis, K1_ORIENT,K1 Ellipse - Orientation, K1_PHASE,K1 Ellipse - Phase of the Ellipse, K1_ROTATE,K1 Ellipse - Rotational Direction, MEAN_SP_PC,Mean Spring Peak Current - Speed (m/s),Mean Spring Peak Current - speed in metres per second MSPC_ROTAT,Mean Spring Peak Current Direction,followed by direction in degrees (clockwise from North). MEAN_NE_PC,Mean Neap Peak Current - Speed (m/s),Mean Neap Peak Current - speed in metres per second MNPC_ROTAT,Mean Neap Peak Current Direction,followed by direction in degrees (clockwise from North). The frequency distribution gives the percentage time the current is within a specified range of speeds. The upper limits (in ms-1) for each of the intervals are: every 0.1 ms-1 for the range 0.0 to 3.0 ms-1 every 0.2 ms-1 for the range 3.0 to 5.0 ms-1 over 5.0ms FRQ_CR_0_1,% Time Current 0.0 - 0.1 (m/s), FRQ_CR_0_2,% Time Current 0.1 - 0.2 (m/s), FRQ_CR_0_3,% Time Current 0.2 - 0.3 (m/s), FRQ_CR_0_4,% Time Current 0.3 - 0.4 (m/s), FRQ_CR_0_5,% Time Current 0.4 - 0.5 (m/s), FRQ_CR_0_6,% Time Current 0.5 - 0.6 (m/s), FRQ_CR_0_7,% Time Current 0.6 - 0.7 (m/s), FRQ_CR_0_8,% Time Current 0.7 - 0.8 (m/s), FRQ_CR_0_9,% Time Current 0.8 - 0.9 (m/s), FRQ_CR_1_0,% Time Current 0.9 - 1.0 (m/s), FRQ_CR_1_1,% Time Current 1.0 - 1.1 (m/s), FRQ_CR_1_2,% Time Current 1.1 - 1.2 (m/s), FRQ_CR_1_3,% Time Current 1.2 - 1.3 (m/s), FRQ_CR_1_4,% Time Current 1.3 - 1.4 (m/s), FRQ_CR_1_5,% Time Current 1.4 - 1.5 (m/s), FRQ_CR_1_6,% Time Current 1.5 - 1.6 (m/s), FRQ_CR_1_7,% Time Current 1.6 - 1.7 (m/s), FRQ_CR_1_8,% Time Current 1.7 - 1.8 (m/s), FRQ_CR_1_9,% Time Current 1.8 - 1.9 (m/s), FRQ_CR_2_0,% Time Current 1.9 - 2.0 (m/s), FRQ_CR_2_1,% Time Current 2.0 - 2.1 (m/s), FRQ_CR_2_2,% Time Current 2.1 - 2.2 (m/s), FRQ_CR_2_3,% Time Current 2.2 - 2.3 (m/s), FRQ_CR_2_4,% Time Current 2.3 - 2.4 (m/s), FRQ_CR_2_5,% Time Current 2.4 - 2.5 (m/s), FRQ_CR_2_6,% Time Current 2.5 - 2.6 (m/s), FRQ_CR_2_7,% Time Current 2.6 - 2.7 (m/s), FRQ_CR_2_8,% Time Current 2.7 - 2.8 (m/s), FRQ_CR_2_9,% Time Current 2.8 - 2.9 (m/s), FRQ_CR_3_0,% Time Current 2.9 - 3.0 (m/s), FRQ_CR_3_2,% Time Current 3.0 - 3.2 (m/s), FRQ_CR_3_4,% Time Current 3.2 - 3.4 (m/s), FRQ_CR_3_6,% Time Current 3.4 - 3.6 (m/s), FRQ_CR_3_8,% Time Current 3.6 - 3.8 (m/s), FRQ_CR_4_0,% Time Current 3.8 - 4.0 (m/s), FRQ_CR_4_2,% Time Current 4.0 - 4.2 (m/s), FRQ_CR_4_4,% Time Current 4.2 - 4.4 (m/s), FRQ_CR_4_6,% Time Current 4.4 - 4.6 (m/s), FRQ_CR_4_8,% Time Current 4.6 - 4.8 (m/s), FRQ_CR_5_0,% Time Current 4.8 - 5.0 (m/s), FRQ_CR_GR5,% Time Current > 5.0 (m/s), AV_POW,Power (kW/m2),Average power obtainable per square metre (vertical cross section) over a complete tidal cycle. AV_NE_POW,Neap Power (kW/m2),Power obtainable per square metre at peak current of an average neap tide AV_SP_POW,Spring Power (kW/m2),Power obtainable per square metre at peak current of an average spring tide
Restricted
Restricted
Marine Officer
Scottish Environment Protection Agency (SEPA) - Aquaculture advice team, Dingwall office
Graesser House Fodderty Way Dingwall Business Park
Dingwall
IV15 9XB
01349 862021
01349 863987
originator
Marine Biodiversity R and D Programme Manager
Department for Environment, Food and Rural Affairs (DEFRA)
Nobel House 17 Smith Square
London
SW1P 3JR
custodian
Project Director
ABP Marine Environmental Research Ltd
pointOfContact
2021-05-26