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Coastal Shoreline Change

Overview

Contacts:

  • David Swanson, Ecologist, National Park Service
  • Scott Miller, Data manager, National Park Service
  • Tahzay Jones

Park Units:

Resource Brief

Coastal environments within Bering Land Bridge National Preserve (BELA) and Cape Krusenstern National Monument (CAKR) are experiencing rapid environmental changes that are observable in the form of coastal erosion, bluff retreat, beach accretion, sediment deposition and permafrost melting. Coastal change will be monitoried primarily through remote sensing of the coastline. Remote sensing methods will involve repeated acquisition (approximately every 5-10 years) and analysis of finely detailed imagery. The total shoreline in ARCN, including bay and barrier island ecosystems, is approximately 450 km (250 miles). This is the third largest block of coastline that the NPS manages. Nearshore coastal waters and shoreline habitats include subtidal zones, sandy shores, barrier spits and islands, lagoons, bays and inlets, tundra bluffs, dune systems, rocky bluffs, deltas, and wetlands. These habitats are critical for bird nesting, seal haul-outs, potential denning sites, freshwater and anadromous fish, and migratory stopover sites for marine mammals and birds. As a result, the coastal zone has a long history of and is still very important for subsistence fishing, egg gathering, and hunting of waterfowl and marine mammals. Many hunting and fishing camps and travel routes associated with subsistence activities are in the coastal zone of BELA and CAKR. Coastal change consists primarily of coastal erosion and bluff retreat, as well as less common beach accretion, deposition of sediments during extreme storms, and modification to inlets and lagoons. A particular concern is that coastal ecosystems are changing rapidly with arctic warming and other environmental stressors (Arctic Climate Impact Assessment 2005). Coastal and nearshore environments in BELA and CAKR are experiencing dramatic changes (Manley et al. 2007), with impacts on a variety of nearshore marine, terrestrial, and freshwater habitats. Coastal erosion directly impacts beach geomorphology and nearshore ecosystems. Bluff erosion causes loss of terrestrial habitat. Changes in sediment erosion and deposition can lead to capture of thaw-lake basins, migration of barrier inlets, flooding or closure of inlets, and other modifications to freshwater habitats. Release of sediment and organic carbon alters nutrient fluxes in nearshore marine and lagoon ecosystems (Jorgenson and Brown 2005). Protected by sea ice for several months each year, the fragile coastal zone may change rapidly with Arctic warming, permafrost melting, sea-level rise, lengthening of the summer sea-ice free season, and changes to storm frequency and severity (Arctic Climate Impact Assessment 2005, Rachold et al. 2005). Coastal change is one of the most observable and sensitive indicators of environmental change for the Arctic. The Coastal Erosion protocol will be linked to other protocols including Climate and Weather, Snow and Ice, Point Source Human Effects, Terrestrial Vegetation and Soils, Bird Assemblages, Stream Communities and Ecosystems, Lake Communities and Ecosystems, Lagoon Communities and Ecosystems, Surface Water Dynamics and Distribution, and Sea Ice.

Products

Citation Year Type Access Holdings IRMA
Click to view holdings Farquharson L and Others. 2018. Digitized Shorelines Dataset, 1950s to 2014, Bering Land Bridge National Preserve and Cape Krusenstern National Monument. National Park Service Arctic Network Inventory and Monitoring Program. Fairbanks, AK (8 holdings) 2018 Geospatial Dataset Public 8 Link to https://irma.nps.gov/App/Reference/Profile/2253677
Download Farquharson_et_al_2018_Chukchi_coastal_change_Marine_Geo.pdf Farquharson LM and Others. 2018. Temporal and spatial variability in coastline response to declining sea-ice in northwest Alaska. Marine Geology. 404(2018):71–83 2018 Journal Article Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2254384
Download Farquharson_dissertation_FINAL.pdf Farquharson LM. 2017. Arctic Landscape Dynamics: Modern Processes and Pleistocene Legacies. University of Alaska Fairbanks 2017 Dissertation Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2252382
Download JonesT_2014_AKR_Coastal_Operations_Report_NRSS.pdf Jones T. 2014. Alaska region FY 12 coastal operations report: Status of operations update. Natural Resource Report. NPS/AKRO/NRR—2014/792. National Park Service. Fort Collins, Colorado 2014 Published Report Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2209225
Click to view holdings Gorokhovich Y and Leiserowiz A. 2012. Historical and Future Coastal Changes in Northwest Alaska. Journal of Coastal Research (JCR). 28(1A):174-186 (2 holdings) 2012 Journal Article Restricted 2 Link to https://irma.nps.gov/App/Reference/Profile/2184138
Download NPS_ARCN_NRR_2012-537_CoastalChangeProtocol.pdf Manley WF and Lestak LR. 2012. Protocol for High-Resolution Geospatial Analysis of Coastal Change in the Arctic Network of Parks. Natural Resource Report. NPS/ARCN/NRR—2012/537. National Park Service. Fort Collins, Colorado 2012 Published Report Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2185931
Download RB_ARCN_CoastEros_Jan11_FINAL.pdf 2011. Arctic Network Coastal Erosion Resource Brief 2011 Resource Brief Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2210664
Download NPS_BELA_CAKR_DEM.zip Lestak L and Manley W. 2010. ASTER/NED Global Digital Elevation Model: Bering Land Bridge National Preserve and Cape Krusenstern National Monument 2010 Geospatial Dataset Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2184135
Click to view holdings Lestak LR and Others. 2010. Digital Shorelines and Analysis for the Coastal Areas of Bering Land Bridge NP (BELA) and Cape Krusenstern. National Park Service. Northwest Alaska, USA (4 holdings) 2010 Geospatial Dataset Public 4 Link to https://irma.nps.gov/App/Reference/Profile/2184176
Click to view holdings Manley W and Manley WF. 2007. Extent Layers for High-Resolution Orthorectified Imagery from 2003 for the Coastal Areas of Cape Krusenstern NM (CAKR), Northwest Alaska. Eric G. Parrish (2 holdings) 2007 Geospatial Dataset Public 2 Link to https://irma.nps.gov/App/Reference/Profile/1044490
Click to view holdings Manley W and Manley WF. 2007. Index Layers for High-Resolution Orthorectified Imagery from 2003 for the Coastal Areas of Bering Land Bridge NP (BELA). Eric G. Parrish (2 holdings) 2007 Geospatial Dataset Public 2 Link to https://irma.nps.gov/App/Reference/Profile/1044493
Click to view holdings Manley W and Manley WF. 2007. Index Layers for High-Resolution Orthorectified Imagery from 2003 for the Coastal Areas of Cape Krusenstern NM (CAKR), Northwest Alaska. Eric G. Parrish (2 holdings) 2007 Geospatial Dataset Public 2 Link to https://irma.nps.gov/App/Reference/Profile/1044496
Click to view holdings Manley WF and Others. 2007. Extent Layers for High-Resolution Orthorectified Imagery from 2003 for the Coastal Areas of Bering Land Bridge NP (BELA) (2 holdings) 2007 Geospatial Dataset Public 2 Link to https://irma.nps.gov/App/Reference/Profile/1044489
Download Jordan_et_al_ACD_2006_abstract.pdf Jordan J and Others. 2006. Field-based measurement of coastal erosion in the Southeast Chukchi Sea, Alaska. In Field-based measurement of coastal erosion in the Southeast Chukchi Sea, Alaska. Netherlands. 2006. Netherlands 2006 Conference Proceeding Paper Public 1 Link to https://irma.nps.gov/App/Reference/Profile/2194515


Details

Key words: accretion, alaska, beach, bering land bridge, bluff, cape krusenstern, coast, coastal, erosion, monitoring, national park, retreat, sea ice, shore line, shoreline

Subject Category:

  • Ecological Framework: Geology and Soils | Geomorphology | Coastal/Oceanographic Features and Processes

View this project 'Coastal Erosion Monitoring in the Arctic Network National Parklands' on the IRMA Data Store | JSON | XML | Project reference last updated on 2018-08-16 09:40:29 by SDMiller@nps.gov

Last Updated: July 14, 2017 Contact Webmaster