{"id":978,"date":"2020-02-12T17:04:39","date_gmt":"2020-02-12T21:04:39","guid":{"rendered":"https:\/\/www2.whoi.edu\/site\/aomip\/?page_id=978"},"modified":"2021-06-18T09:41:22","modified_gmt":"2021-06-18T13:41:22","slug":"currents-data","status":"publish","type":"page","link":"https:\/\/www2.whoi.edu\/site\/aomip\/data\/validation-data\/currents-data\/","title":{"rendered":"Currents data"},"content":{"rendered":"\n\n\t

Currents data<\/h1>\n

A1 (“cm2011a1.dat”) is the most recent climatological summary from humankind’s history of current meter, as well as more recent profiler, observations. A1 identifies 18588 distinct “climatological points” on the basis of observations of duration greater than two weeks. In total the compilation spans 12,825 years of ocean current observations.<\/p>\n

A1 combines results from 7593 points discussed in Holloway (2008) and 5814 points discussed in Scott et al. (2010). Both compilations have been further extended by their respective authors, in particular including the collection from Gregory (2004). Summaries at over 17,000 point were thus gathered. However this included extensive redundancies, “near redundancies”, and partially overlapping observation periods. Data collected in adjacent years, sometimes continuously spanning several years, at the same location were collapsed to a single climatological point. In other cases where the same location was revisited after a span of several years or even decades, a separate “climatological point” was retained although these separated-in-time records could be collapsed for purpose of climatology. For climatological purposes, profiler records which can be quite dense in vertical were rebinned to a minimum of 20m, in some cases 50m, vertical separation.<\/p>\n

Recently Darran Furnival has contributed from 5991 locations screened to avoid redundancy.\u00a0 With further quality control effort this has led to the present collection at 18588 locations (in lat-long-depth) corresponding to 4477 sites (in lat-log).\u00a0 Data sites are shown in Figs 1 and 2.<\/p>\n\n

File “cm2011a1.dat” is in plain text (ascii) listing 18588×11 array with blanks as separators. The 11 columns are:<\/p>\n

1. an ID code for locating the originating data source<\/p>\n

2. latitude (degr, N=+)<\/p>\n

3. longitude (degr, E=+)<\/p>\n

4. instrument depth (m)<\/p>\n

5. year of initial deployment (-999 if unknown)<\/p>\n

6. number of months of deployment<\/p>\n

7. mean U (eastward, cm\/s)<\/p>\n

8. mean V (northward, cm\/s)<\/p>\n

9. std dev about U (cm\/s, -9.99 if unknown)<\/p>\n

10. std dev about V (cm\/s, -9.99 if unknown)<\/p>\n

11. nominal depth to the bottom (m, -999 if unknown)<\/p>\n

References<\/h2>\n

Gregory, D.N., 2004: Ocean Data Inventory (ODI): A Database of Ocean Current, Temperature and Salinity Time Series for the Northwest Atlantic. DFO Can. Sci. Advis. Sec. Res. Doc. 2004\/097<\/p>\n

Holloway, G., 2008: Observing global ocean topostrophy.\u00a0J. Geophys. Res.<\/em>, 113, C07054, doi:10.1029\/2007JC004635<\/p>\n

Scott, R. B., B. K. Arbic, E. P. Chassignet, A. C. Coward, M. Maltrud, W. J. Merryfield, A. Srinivasan, A. Varghese, 2010: Total kinetic energy in four global eddying ocean circulation models and over 5000 current meter records.\u00a0Ocean Modelling<\/em>, 32, 157-169, DOI: 10.1016\/j.ocemod.2010.01.005.<\/p>\n

Acknowledgments<\/h2>\n

Greg Holloway is employed by the Canadian Dept of Fisheries and Oceans. Rob Scott, employed by the University of Texas at Austin, acknowledges grants from the National Science Foundation and the King Abdullah University of Science and Technology.\u00a0 Darran Furnival is employed at the National Oceanography Centre, Southampton, UK.\u00a0 Very many more individuals have contributed as acknowledged in Holloway (2008) and in Scott et al. (2010).\u00a0 We are deeply grateful to all contributors.<\/p>\n\t\t\t\t\n\t\t\t\t\"Global\n\t\t\t\t<\/a>\n\t\tFigure 1. Global distribution of A1 data sites.\n\t\t\t\t\"Distribution\n\t\tFigure 2. Distribution of A1 data sites in Arctic region.\n\t

Related Files<\/h2>\n