gov.noaa.nmfs.inport:39342 eng UTF8 dataset National Centers for Coastal Ocean Science resourceProvider NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov pointOfContact 2025-05-15T19:16:09 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) complex 6814 Massachusetts Bay - Internal Wave Packets Extracted from SAR Imagery Binned in 1x1 minute grid cells iw_binned1min 2006 publication NOAA/NMFS/EDM 39342 https://www.fisheries.noaa.gov/inport/item/39342 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Costa, Bryan bryan.costa@noaa.gov principalInvestigator https://coastalscience.noaa.gov/projects/detail?key=141 WWW:LINK-1.0-http--link Citation URL Online Resource download This feature class contains internal wave packets extracted from SAR imagery that were binned in 1x1 minute latitude/longitude polygon grid cells. Statistics were calculated for each polygon grid cell---in particular, internal wave packet frequency, total internal wave packet area, average internal wave packet area, minimum internal wave packet area, maximum internal wave packet area, the variance of internal wave packet areas and the standard deviation of internal wave packet areas. These statistics were calculated so as to better understand the frequency, size and location of internal wave packets in Massachusetts Bay. Created to support the biogeographic assessment of Stellwagen Bank National Marine Sanctuary. National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment (CCMA), Biogeography Program:http://ccma.nos.noaa.gov/about/biogeography/ completed NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov pointOfContact NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov custodian notPlanned Environmental Monitoring theme NOS Data Explorer Topic Category Internal Waves SAR Synthetic Aperture Radar theme 1998-2003 temporal Gulf of Maine Massachusetts Bay Stellwagen Bank National Marine Sanctuary place DOC/NOAA/NOS/NCCOS > National Centers for Coastal Ocean Science, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian SBNMS_Assess_Internal_Waves project InPort otherRestrictions Cite As: National Centers for Coastal Ocean Science, [Date of Access]: Massachusetts Bay - Internal Wave Packets Extracted from SAR Imagery Binned in 1x1 minute grid cells [Data Date Range], https://www.fisheries.noaa.gov/inport/item/39342. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None. otherRestrictions Use Constraints: None. Acknowledgement of the National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, Biogeography Program would be appreciated in products derived from these data. otherRestrictions Distribution Liability: These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 39342 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/nccos/dmp/pdf/39342.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference vector eng; US imageryBaseMapsEarthCover oceans Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 -71.529044 -69.109407 41.235121 42.987986 | Currentness: Ground Condition 1998-05-14 2003-09-29 Jackson, C.R. and J.R. Apel. 2004. Synthetic Aperture Radar Marine User's Manual. NOAA NESDIS: Washington, D.C. pp. 464. Available from: http://www.orbit.nesdis.noaa.gov/sod/mecb/sar/sarmanual.html false eng false InternalWave_Packets_Binned1minGrid 2017-04-17 publication NCCOS Scientific Data Coordinator NCCOS.data@noaa.gov distributor https://coastalscience.noaa.gov/projects/detail?key=141 WWW:LINK-1.0-http--link https://coastalscience.noaa.gov/projects/detail?key=141 Online Resource download dataset Completeness Report Unknown Conceptual Consistency Unknown BACKGROUND:Synthetic Aperture Radar (SAR) can detect internal waves by emitting pulses of X-band (3cm), C-band (6cm) and L-band (24 cm) microwave energy, producing a two-dimensional radar backscatter map of the roughness of the ocean surface (Jackson and Apel, 2004 p.21, 41). In SAR imagery, internal waves appear as packets or groups of waves characterized by: 1) Alternating bands of bright and dark bands. The bright band is associated with the convergence zone, as determined by the orbital particle motion within the internal wave. 2) Curvilinear wave crests bent by refraction 3) Decreasing wave crest lengths from front to back of each packet 4) Decreasing wavelengths from front to back of each packet, indicating propagation direction and that nonlinear wave dispersion is in effect. 5) Decreasing wave amplitudes from front to back of each packet 6) Propagation parallel to significant isobaths Less often, internal waves may also be seen composed of only dark bands with no associated bright bands. This varying appearance is due to sensitivity to wind speed and wind direction, as well as to the orientation of the wave groups to the radar platform (Jackson and Apel, 2004 p.47). METHODS: In this study, the following methodology was used to identify and delineate internal wave packets in ESRI ArcGIS (ArcView) 9.1. First of all, a search extent was defined in order to narrow the geographic area in which to look for the internal waves. This area roughly covered from 42 deg 44 min 19 sec N to 41 deg 30 min 2 sec N and from 71 deg 8 min 3 sec W to 69 deg 36 min 30 sec W.. Each of the 66 SAR images (which were taken between May 14, 1997 and August 29, 2003) were examined for internal waves, using the internal wave packet characteristics listed above as an identification guide. A ESRI polygon shapefile was created with columns recording the SAR image tile name, its year, date and time, as well as the internal wave packet area, packet propagation direction and moon phase during which it occurred. All internal wave packets were digitized at a 1:350,000 scale and saved in this shapefile, along with the necessary attribute information. The internal wave packet data were analyzed using a non-parametric Kruskal-Wallis test for significant differences in the median with a Dunn's post hoc test. 2006-02-01T00:00:00