28fb74eb70d68879534bfbecb294d78d English 9e87c1ef99c2d380fd71e07d78310a49 dataset Claire Brown ABP Marine Environmental Research Ltd Project Director cbrown@abpmer.co.uk pointOfContact 2021-05-26 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4326 2010 Defra MB0106 Atlas Tide Resources 2010-12-31 publication 2010-01-01 creation 2010-12-31 revision MB0106000000027 http://randd.defra.gov.uk/default.aspx 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. Scottish Environment Protection Agency (SEPA) - Aquaculture advice team, Dingwall office Marine Officer 01349 862021 01349 863987 Graesser House Fodderty Way Dingwall Business Park Dingwall IV15 9XB FFMarineScience@sepa.org.uk originator Carole Kelly Department for Environment, Food and Rural Affairs (DEFRA) Marine Biodiversity R and D Programme Manager Nobel House 17 Smith Square London SW1P 3JR enquiries@defra.gsi.gov.uk custodian notPlanned Geographic Information System Marine Environmental Data and Information Network NDGO0005 Buildings GEMET - INSPIRE themes, version 1.0 2008-01-06 revision Man-made structures SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Restricted otherRestrictions Restricted 1.8 English structure SeaDataNet vertical extent keywords 2010-01-01 revision unknown -9.6005 3.3977 48.4260 61.4994 2010-01-01 2010-12-31 http://randd.defra.gov.uk/Default.aspx?Menu=Menu&Module=More&Location=None&Completed=0&ProjectID=16415 Claire Brown ABP Marine Environmental Research Ltd Project Director cbrown@abpmer.co.uk distributor dataset 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