Contoured data

The x,y coordinates of the contour-lines, that were obtained with Surface III v. 2.6 for all samples, organized by core (for specific setting of parameters in Surface III see further below) are organized in subdirectory DContour. These data are free for download so that readers can experiment with them by their own. Each core has its own subdirectory, and the individual sample files are labelled as SAMPLE.ARC. All samples have contour intervals of 2 (i.e. two coccoliths per grid-cell, grid-cell size of 1 µm x 2 elements). The data are stored as Microsoft Word documents. Each closed contour-line is represented as text block with a suite of x,y coordinate-pairs. Each text block starts with a running integer (beginning with 1), and ending with END. If there are more than one contour at the same contour level, each contour line is represented as a separate text block.

 

In each core directory there is also a subdirectory called "LEVEL_2". These subdirectories contain, - organized by core, - the x,y coordinates for the contour lines at the specific contour level of two coccoliths per grid-cell (these were the contourlines, that were selected in order to construct the animations). The convetion for the names of these files is the following: The first characters (up to 8 characters) represent the sample designation, and the suffix .AR2 means the contour line at level of 2 coccoliths per grid-cell (obtained with the Arcinfo tool in Surface III, see below).

 

 

List of cores with contoured data used for this article:

 

Meteor core ME69-196

Vema core V16-205

DSDP Site 223

DSDP Site 224

DSDP Site 236 and MD85682, 0cm

DSDP Site 251 and MD73017, 0cm

DSDP SITE 251A

DSDP Site 366A

DSDP Site 572A

DSDP Site 608

 

For the 8.3 character encoding rule for electronic publication, the following abbreviations were used for the sample names: Samples from cores ME69-196, V16-205 are indicated by the sample interval or sample depths (in cm) in the respective directories. Samples, that were taken from DSDP cores follow the DSDP sample convention, i.e. core_section_interval in cm. The suffix .ARC indicates, that these resulted from Surface III using the Arcinfo tool. Sample designations such as MD856820.ARC and MD730170.ARC indicate contoured data from piston cores MD85682 at 0cm and MD73017 at 0cm core depth, respectively.

 

 

Recommendation for settings in Surface III to construct the contour lines:

Menu Edit/Preferences: select cm

 

Menu Input z value matrix data: read in gridded files (text only format). Remove header from gridded files first.

# cols: 14

First value in bottom map

Left edge=1 right edge=14

Grid bottom=1 grid top =27

 

Menu Plot/Map Size

Width=14 cm

Height=14 cm

 

Menu Plot/Map Extremes

x=0 to 15 (map left to right)

y=0 to 30 (map bottom to top)

 

Menu Plot/Contours

Contour interval = 2

Contour smooth = "light"

 

Export contours using Arcinfo tool to obtain x,y coordinates for contour lines per contour interval.