Acceptance and utilization of LTER data requires that:
(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:
Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543
| Dataset URLs: | METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data |
| Dataset ID: | MAR-RO-Marker-Horizon.01 |
| Dataset Title: | Marsh surface marker horizon measurements at each Surface Elevation Table (SET) site. |
| Investigator 1: | |
| First Name: | Charles |
| Last Name: | Hopkinson |
| Address line 1: | Ecosystems Center |
| Address line 2: | MBL |
| Address line 3: | 7 MBL St |
| City: | Woods Hole |
| State: | MA |
| Zip Code: | 02543 |
| Country: | USA |
| Associate Investigators: | Corey Lawrence, Joshua Goldstein, Vinton Valentine, Charles Hopkinson, Hap Garritt, William Lee, Aaron Strong |
| Keywords: | Surface elevation table, SET, Sedimentation, Accretion, Marker Horizons, Erosion |
| Abstract: | Marker Horizon depths at each Surface Elevation Table site. |
| Contact: | Plum Island Ecosystems LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7485 Email: pie_im@mbl.edu Online URL: http://ecosystems.mbl.edu/PIE/ |
| DATA FILE INFORMATION: | |
| Data File URL | http://ecosystems.mbl.edu/PIE/data/MAR/data/MAR-RO-Marker-Horizon.dat |
| Data File Name | MAR-RO-Marker-Horizon |
| Beginning Date | 12/7/2000 |
| End Date | 5/1/2003 |
| Number of Data Records | 145 |
| Other Files to Reference | MAR-RO-SET.xls |
| Availability Status | Type 1 |
| Quality Control Information | |
| Maintenance Description | |
| Log of Changes: | |
| RESEARCH LOCATION: | Site 1 |
| Geographic Description | Holy Island SET 1 |
| Location Bounding Box | |
| West Bounding Coordinate | |
| East Bounding Coordinate | |
| North Bounding Coordinate | |
| South Bounding Coordinate | |
| OR if single point location | |
| Latitude | 42.73118814 |
| Longitude | -70.82625404 |
| Methods: | Marker Horizons are a thin layer of Feldspar. Marker Horizons depths are measured each spring and fall. Each SET site has one Marker Horizon; three replicate cores are taken from each horizon during samplings. The depth of sediment accreted above the feldspar marker is measured on 4 side of the rectangular core using calipers. Measurements are made to the top of the feldspar layer. Cores are replaced after the measurements have been made. The values recorded in the data file represent sediment above marker horizon at the time of measurement. It is important to note that different cores are taken during each measurement, thus core A on date “X” can not be to compared to core A on date “Y”. For comparisons over time, measurements should be averaged over all “cores” and “replicates” for each individual SET. Cores or “Plugs” are taken from each horizon using a kitchen knife. This method is not ideal for several of our more wet sites. There is a high probability of erroneous measurement in sites that are very wet. We are working on a better method for sampling. For more information on SET and Marker Horizons see: http://www.pwrc.usgs.gov/resshow/cahoon/ RESEARCH LOCATION: Latitude and Longitude reported as decimal degrees in the NAD 83 Datum. Elevation is reported as NAVD 88, orthometric height (meters), and is currently an unprocessed measurement of the SET insert pipe. For more information please contact Aaron Strong (astrong@mbl.edu). Locations for Levine’s SET 2-3 are not available at this time. Site SET # Marker Horizon LAT LONG Elevation Marsh Type Dominant Vegetation Installation Date Holy Island 1 04/30/03 42.73118814 -70.82625404 1.36 Low Spartina alterniflora (short) Holy Island 2 04/30/03 42.7305772 -70.82672061 1.45 Transition Spartina alterniflora (short) Holy Island 3 04/30/03 42.73009768 -70.82693638 1.69 High Spartina patens Laws Point 1 12/7/2000 42.73157969 -70.84149472 1.39 Low Spartina alterniflora (short) Laws Point 2 12/7/2000 42.7312578 -70.84219796 1.40 Transition Spartina alterniflora (short) Laws Point 3 12/7/2000 42.73069447 -70.84275403 1.70 High Spartina patens Levine’s 1 12/7/2000 42.72733649 -70.85228593 1.68 Low Spartina patens Levine’s 2 12/7/2000 High Spartina alterniflora (short) Levine’s 3 12/7/2000 High Spartina patens Morris Island 1 05/01/03 42.72912254 -70.83472098 1.18 Low Spartina alterniflora (tall) Morris Island 2 05/01/03 42.72923966 -70.83544812 1.07 Low Spartina alterniflora (tall) Morris Island 3 05/01/03 42.72942128 -70.836324 1.13 Low Spartina alterniflora (tall) |
| Variable Name | Variable Description | Units | Measurement Scale | Code Infomation | Number Type | DateTime Format | Missing Value Code | Missing Value Code Explanation |
| Date Installed | Date marker horizon was installed | datetime | dd-mmm-yyyy | blank cell | ||||
| Site | Location of transect | nominal | blank cell | |||||
| SET # | SET # in transect (1-3) | nominal | blank cell | |||||
| Core | Replicate core number of each Marker Horizon (1-3) | nominal | blank cell | |||||
| Rep | Replicate measurement number of each core (1-4) | nominal | blank cell | |||||
| Depth on 19Nov2002 | Measurement of feldspar depth from surface of core | millimeter | ratio | real | blank cell | |||
| Depth on 30Apr2003 | Measurement of feldspar depth from surface of core | millimeter | ratio | real | blank cell | |||
| Depth on 8Oct2003 | Measurement of feldspar depth from surface of core | millimeter | ratio | real | blank cell | |||
| Comments | Information pertaining to individual data points | nominal | blank cell |