OMEX2 North Atlantic Seasonal Sediment Trap Foraminifera Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: OMEX2 North Atlantic Seasonal Sediment Trap Foraminifera Data LAST UPDATE: 3/2010 (Original receipt by WDC Paleo) CONTRIBUTOR: Chapman, M.R. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2010-026 WDC PALEO CONTRIBUTION SERIES CITATION: Chapman, M.R. 2010. OMEX2 North Atlantic Seasonal Sediment Trap Foraminifera Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2010-026. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Chapman, M.R. 2010. Seasonal production patterns of planktonic foraminifera in the NE Atlantic Ocean: Implications for paleotemperature and hydrographic reconstructions. Paleoceanography, 25, PA1101, doi:10.1029/2008PA001708. ABSTRACT: Sediment trap samples from OMEX 2 (49°N, 13°W) provide a continuous record of the seasonal succession of planktonic foraminifera in the midlatitude North Atlantic and reveal a complex relationship between periods of production and specific hydrographic conditions. Neogloboquadrina pachyderma dextral coiling (d.), Globigerina bulloides, and Globorotalia inflata are found in great numbers during both the spring and summer seasons, whereas Globigerina quinqueloba, Globorotalia hirsuta, Globorotalia scitula, and Globigerinita glutinata are associated predominantly with the increase in productivity during the spring bloom. Globigerinella aequilateralis, Orbulina universa, and Globigerinoides sacculifer are restricted to late summer conditions following the establishment of a warm, well-stratified surface ocean. An annually integrated fauna from the sediment trap, comprising ~13,000 individuals, is used to evaluate the accuracy of five faunal-based statistical methods of paleotemperature estimation. All of the temperature reconstruction techniques produce estimates of ~16°C and ~11°C for summer and winter surface temperature, respectively, which are in excellent agreement with regional hydrographic data and suggest that the sediment trap assemblage is well represented in the core top faunas. Analysis of the key species that dominate the OMEX 2 sediment trap fauna, G. bulloides, G. inflata, and N. pachyderma d., based on d18O derived temperatures from North Atlantic core top samples, suggests that seasonal variations in planktonic foraminiferal production are nonuniform across the midlatitudes and that this is likely to complicate reconstructing past seasonal hydrographic dynamics using these taxa. GEOGRAPHIC REGION: North Atlantic PERIOD OF RECORD: Modern FUNDING SOURCE: Natural Environment Research Council DESCRIPTION: Sediment trap foraminifera data for the North Atlantic (49°N, 13°W) from the OMEX 2 project, at sub-seasonal resolution. DATA: 1. OMEX 2 Sediment Trap Raw counts StartDate Sample O.uni G.rubW G.sac G.aeq G.bul G.fal G.dig G.qui N.pacS N.pacD G.inf G.tru G.hir G.sci G.glu Others Total Split analysed 7/1/1993 1 14 1 7 85 16 124 42 6 53 3 351 0.125 7/10/1993 2 28 2 10 128 7 255 120 58 3 611 0.125 7/19/1993 3 20 1 45 167 2 236 94 15 4 584 0.125 7/28/1993 4 20 1 87 123 2 286 76 30 4 629 0.125 8/6/1993 5 75 2 8 57 143 1 229 54 15 2 586 0.0625 8/15/1993 6 133 4 101 112 3 173 20 12 1 559 0.0625 8/24/1993 7 60 3 63 21 1 88 21 6 1 264 0.0625 9/2/1993 8 10 13 15 1 13 14 2 1 69 0.125 9/11/1993 9 72 6 88 124 1 258 74 17 6 646 0.125 9/20/1993 10 25 19 27 1 1 46 39 6 5 169 0.125 9/29/1993 11 4 3 3 64 2 76 0.125 10/8/1993 12 29 3 10 1 20 16 1 16 52 148 0.125 10/17/1993 13 7 4 48 38 16 13 35 24 185 0.125 10/26/1993 14 3 50 3 67 48 35 114 57 377 0.125 11/4/1993 15 2 2 179 1 53 366 50 50 50 101 854 0.0625 11/13/1993 16 16 13 155 1 31 353 185 58 40 168 1020 0.0625 11/23/1993 17 28 14 85 2 38 251 124 47 47 94 730 0.03125 12/3/1993 18 3 6 3 46 25 7 10 100 0.125 12/13/1993 19 34 1 3 41 6 79 26 1 17 208 0.125 1/12/1994 20 12 1 27 142 2 279 119 32 2 616 0.125 1/24/1994 21 16 2 69 167 4 269 52 18 2 599 0.125 2/7/1994 22 9 28 8 22 6 15 88 0.125 2/21/1994 23 50 5 115 122 1 256 32 14 1 596 0.125 3/7/1994 24 117 1 3 75 44 5 1 1 117 25 8 3 400 0.125 3/21/1994 25 41 68 80 2 2 134 56 2 3 388 0.125 4/2/1994 26 21 31 34 63 27 3 179 0.125 4/14/1994 27 17 1 2 30 91 2 129 57 3 2 334 0.125 4/26/1994 28 4 1 5 28 2 40 0.125 5/8/1994 29 2 7 1 3 1 35 13 62 0.125 5/20/1994 30 14 1 3 26 1 30 1 76 0.125 6/1/1994 31 14 3 18 12 1 10 10 68 0.125 6/13/1994 32 3 66 1 20 89 32 83 202 73 569 0.125 6/25/1994 33 2 7 121 3 73 2 157 14 2 13 60 454 0.0625 7/19/1994 34 8 10 65 2 13 1 120 92 22 30 62 425 0.125 7/30/1994 35 3 1 8 7 6 25 0.0625 Notes: Abbreviations: S=sinistral coiling, D=dextral coiling Sample 8 - incomplete, material lost 2. Taxa Percentages Sample O.univ G.congl G.ruberP G.ruberW G.tenel G.trilob G.saccul S.dehisc G.aequil G.calida OMEX2_annual 6.74 0.00 0.00 0.03 0.00 0.00 0.32 0.00 7.69 0.00 Sample G.bulloid G.falcon G.digita G.rubesc G.quinq N.pachS N.pachD N.dutert P.obliq G.infla OMEX2_annual 19.44 0.02 0.10 0.00 2.24 0.06 35.35 0.00 0.00 11.97 Sample G.truncS G.truncD G.crass P-Dinter G.hirsut G.scitul G.menar G.tumida G.glutin T.humil Others OMEX2_annual 0.02 0.00 0.00 0.00 2.64 7.73 0.00 0.00 5.64 0.00 0.01 3. SST's Method Config details/notes Season Calib.Err. T_SedTrap°C T_CoreTop°C FA20 Factor analysis, multiple regression(Aug) summer 1.17 16.256 19.0583 RAM 10nn 030 030 summer 0.91 16.42 16.66 MAT 10nn 0.75 summer 1.12 16.77 16.1 SIMMAX 738 10nn 0.75 distance weighted summer 0.96 16.8 17.37 SIMMAX 947 10nn 0.75 distance weighted summer 0.96 16.61 17.72 FA20 Factor analysis, multiple regression(Feb) winter 1.25 11.0491 13.8929 RAM 10nn 030 030 winter 0.7 11.18 11.79 MAT 10nn 0.75 winter 0.99 11.56 11.52 SIMMAX 738 10nn 0.75 distance weighted winter 0.9 11.65 12.22 SIMMAX 947 10nn 0.75 distance weighted winter 0.9 11.4 12.31 Atlas 0m summer 16.537 16.537 Atlas 10m summer 16.4006 16.4006 Atlas 0m winter 11.2151 11.2151 Atlas 10m winter 11.2 11.2