uid=PIE,o=lter,dc=ecoinformatics,dc=org all public read MON-BO-SeaLevel-Monthly-MSL.03 Plum Island Ecosystems LTER Program Anne Giblin

Ecosystems Center MBL 7 MBLSt Woods Hole MA 02543 USA

Plum Island Ecosystems LTER Program

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ Joe Vallino additional investigator Hap Garritt additional investigator Jim Morris additional investigator Samuel Kelsey additional investigator 2005 Monthly sea level data for NOAA/NOS station 8443970, Boston, Massachusetts. NOAA/NOS Center for Operational Oceanographic Products and Services (CO-OPS) PIE LTER disturbance Plum Island Ecosystems Massachusetts Boston water level sea level Acceptance and utilization of PIE-LTER data requires that: The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions. 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 A copy of any resultant publications should be sent to: Principal Investigator Ecosystems Center Marine Biological Laboratory Woods Hole, MA 02543 http://ecosystems.mbl.edu/PIE/data/PHY/MON-BO-SeaLevel-Monthly-MSL.html NOAA/NOS Boston, MA sealevel Station 8443970 -71.053333 -71.053333 42.353333 42.353333 1921-01-01 2011-12-31 Annual updates Version 01 , March 13, 2008, Level 3+ EML, data relative to NAVD88 datum Version 02, 2008-2009 data added, 18Jan2011 Version 03: January 26, 2012, updated data and metadata, 2010-2011. Used MarcrosExportEML_HTML (working)pie_excel2007.xlsm 1/18/12 4:51 PM for QA/QC to EML 2.1.0 Data Manager

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ Plum Island Ecosystems LTER

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu http://ecosystems.mbl.edu/PIE/ NOTES AND COMMENTS: Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal Datum Epoch. It pertains to local mean sea level and should not be confused with the fixed datums of North American Vertical Datum of 1988 (NAVD 88). The National Oceanic and Atmospheric Administration, National Ocean Service (NOS) is updating the nation's tidal datums to a new National Tidal Datum Epoch (NTDE) to reflect changes in mean sea level along the nation's coast. The new NTDE will provide up-to-date tidal datum information available for applications that are essential to support NOAA's strategic programs, as well as other Federal, State and private sector coastal zone activities. As a result of the update, more accurate tidal information will be made available for widespread application to hydrographic surveys and mapping programs, navigational safety (Physical Oceanographic Real Time Systems, PORTS®), wetland restoration, marine boundaries, coastal engineering, storm warnings and hazard mitigation, emergency management, and hydrodynamic modeling. The (NTDE) is a specific 19-year period over which tide observations are taken to determine Mean Sea Level and other tidal datums such as Mean Lower Low Water and Mean High Water. This latest update will define the 19-year period as 1983-2001. A tidal datum is a vertical reference based on a specific stage of tide which serves as a baseline elevation to which sounding depths or topographic heights are referenced. The 19-year period includes an 18.6 year astronomical cycle that accounts for all significant variations in the moon and sun that cause slowly varying changes in the range of tide. The NTDE has been adopted so that tidal datum determinations throughout the United States will be based on one specific common reference period. Relative mean sea level, which is a term used to denote the average height of the ocean relative to land, can vary by location and over time and is not the same at all locations. It is the policy of NOS to consider a revised NTDE every 20-25 years in order to take into account relative sea level changes caused by global sea level change and the effects of long term local land movement due to subsidence or glacial rebound. Previous tidal Epochs were determined for periods 1924-42, 1941-59, and 1960-78. Water level measurements taken by NOS over long periods of time are used to smooth out shorter term (daily, monthly, annual) variations which help reveal long term trends (see http://tidesandcurrents.noaa.gov/sltrends/sltrends.shtml). The NOS Center for Operational Oceanographic Products and Services (CO-OPS) has the responsibility for operating and maintaining the National Water Level Observation Network, comprised of 175 long term stations in the coastal ocean and Great Lakes. The tide stations are used as the primary reference for determination of tidal datums and bench mark elevations (permanent monuments with elevations referenced to tidal datums) for station locations listed on the CO-OPS web site. A significant number of these tidal bench mark information "sheets" will be made available on the 1983-2001 NTDE after April 21, 2003. The remaining stations, that meet NOS publication standards, will be continuously updated until the process is completed at the end of FY 2003. For further information please contact Steve Gill at 301-713-2981 Extension 139, or Stephen.Gill@noaa.gov Boston Station Datum, PID MY0555 Data Retrieval site: http://tidesandcurrents.noaa.gov/data_menu.shtml?stn=8443970%20Boston,%20MA&type=Historic+Tide+Data Jan 26 2012 21:26 GMT ELEVATIONS ON STATION DATUM National Ocean Service (NOAA) Station: 8443970 T.M.: 0 W Name: Boston, MA Units: Meters Status: Accepted (Apr 17 2003) Epoch: 1983-2001 Datum: STND Datum Value Description --------- -------- ---------------------------------------- MHHW 4.205 Mean Higher-High Water MHW 4.071 Mean High Water NAVD88 2.752 North American Vertical Datum of 1988 MSL 2.660 Mean Sea Level DTL 2.640 Mean Diurnal Tide Level MTL 2.624 Mean Tide Level MLW 1.178 Mean Low Water MLLW 1.074 Mean Lower-Low Water STND 0.000 Station Datum Anne Giblin

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7488 agiblin@mbl.edu Lead PI Hap Garritt

The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole MA 02543 USA

(508) 289 7485 pie_im@mbl.edu Information Manager The Plum Island Ecosystems (PIE) LTER is an integrated research, education and outreach program whose goal is to develop a predictive understanding of the long-term response of watershed and estuarine ecosystems at the land-sea interface to changes in climate, land use and sea level. The principal study site is the Plum Island Sound estuary, its coupled Parker, Rowley and Ipswich River watersheds and the adjacent coastal ocean, the Gulf of Maine. The PIE LTER focuses on how several aspects of global change influence organic matter and inorganic nutrient biogeochemistry and estuarine foodwebs. The inputs of organic matter and nutrients from land, ocean and marshes interact with the external drivers (climate, land use, river discharge, sea level) to dictate the extent and degree of nutrient and organic matter processing and determine the spatial patterns of estuarine productivity and trophic structure. This material is based upon work supported by the National Science Foundation under Grants OCE-9726921, OCE-0423565. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The Plum Island Ecosystems (PIE) LTER site, is located in northeastern Massachusetts, 42.72 N, 70.85 W. The PIE LTER lies at the interface of a thinly soiled, formerly glaciated New England land mass and the highly productive Gulf of Maine. Three watersheds comprise the estuarine drainage basin: Parker (155 km2), Rowley (26 km2) and Ipswich (404 km2). The Ipswich River watershed is highly urbanized with Boston "bedroom" communities encroaching in the headwater region while the Parker is less urbanized and retains a higher proportion of forest. -71.2198 -70.7568 42.8276 42.4965 0 100 meter MON-BO-SeaLevel-Monthly-MSL.csv Monthly mean sea level data (1921-2011) relative to NAVD88 for Boston, Massachusetts, NOAA/NOS MON-BO-SeaLevel-Monthly-MSL.csv 1 \r\n column , http://ecosystems.mbl.edu/PIE/data/PHY/data/MON-BO-SeaLevel-Monthly-MSL.csv Station Station unique seven character identifier for the station unique seven character identifier for the station Year Year year of the data yyyy yyyy Month Month numerical month mm mm Highest Highest Highest Tide of the month (relative to NAVD88) meter real MHHW MHHW Mean Higher-High Water (relative to NAVD88) meter real MHW MHW Mean High water (relative to NAVD88) meter real MSL MSL Mean Sea Level (relative to NAVD88) meter real MTL MTL Mean of MHW and MLW (relative to NAVD88) meter real MLW MLW Mean Low Water (relative to NAVD88) meter real MLLW MLLW Mean Lower-Low Water (relative to NAVD88) meter real Lowest Lowest Lowest Tide of the Month (relative to NAVD88) meter real