{"title":"Delta Junction NEON - United States of America","id":{"prefix":"https:\/\/deims.org\/","suffix":"488ced79-07f7-4ebd-942d-c119d0f03c1b"},"type":"site","created":"2020-05-25T09:36:50+02:00","changed":"2025-09-17T13:51:24+02:00","attributes":{"affiliation":{"networks":[{"network":{"name":"GERI","id":{"prefix":"https:\/\/deims.org\/networks\/","suffix":"c3abdc60-49f1-49db-81fe-863b7dbb21d3"}},"siteCode":null,"verified":true},{"network":{"name":"NEON","id":{"prefix":"https:\/\/deims.org\/networks\/","suffix":"fd9fbc88-0baa-4d02-b824-dc29f721782c"}},"siteCode":"DEJU","verified":true}],"projects":null},"contact":{"siteManager":[{"type":"person","name":"Chris Baird","email":"cbaird@battelleecology.org","orcid":null}],"operatingOrganisation":null,"metadataProvider":[{"type":"person","name":"Melissa Marquez","email":"marquez@battelleecology.org","orcid":null}],"fundingAgency":null,"siteUrl":[{"title":null,"value":"https:\/\/www.neonscience.org\/field-sites\/deju"}]},"general":{"abstract":"Delta Junction (DEJU) is a terrestrial NEON field site located in central Alaska, approximately 150 km (93 mi.) southeast of Fairbanks and 15 km (9 mi.) south of the community of Delta Junction. The 29.9 km2 (7390 acre) site is managed by the U.S. Bureau of Land Management. It sits within the Tanana Valley at an elevation of 440 - 485 m (1400 - 1600 ft.), 30 km (18 mi.) from the confluence of the Tanana and Delta Rivers. The location is bordered to the north by the White Mountains, to the southeast by the Granite Mountains, and to the southwest by the Alaska Range. DEJU is one of the four sites (three terrestrial and one aquatic) located in the NEON Taiga Domain (D19), which comprises Alaska\u2019s interior and the Alaska Peninsula.","citation":null,"relatedIdentifiers":null,"status":{"label":"Operational","uri":"http:\/\/vocabs.lter-europe.net\/elter_cl\/10772"},"yearEstablished":2015,"yearClosed":null,"relatedSites":null,"siteName":"Delta Junction NEON","shortName":"DEJU","siteType":"Platform","protectionLevel":null,"landUse":null,"images":[{"url":"https:\/\/deims.org\/sites\/default\/files\/2020-06\/48789436148_564e0a87f2_z.jpg","alt":"DEJU tower"},{"url":"https:\/\/deims.org\/sites\/default\/files\/2020-06\/48754333888_d08120aab0_z.jpg","alt":"Chris Baird encounters the vegetation structure crew"}]},"environmentalCharacteristics":{"airTemperature":{"yearlyAverage":-3,"monthlyAverage":null,"unit":"\u00b0C","referencePeriod":null},"precipitation":{"yearlyAverage":300,"monthlyAverage":null,"unit":"mm","referencePeriod":null},"biogeographicalRegion":null,"biome":"evergreen_forest","ecosystemType":[{"label":"Evergreen Forest","uri":null},{"label":"Forest","uri":null}],"eunisHabitat":null,"landforms":null,"geoBonBiome":["Terrestrial"],"geology":"Local geology is typical of a glaciofluvial setting, where the dominant material is well-rounded gravel in a matrix of silt and sand. Geomorphological features include outwash plains, moraines, stream terraces and floodplains, all of which are characteristic of a formerly glaciated river valley.","hydrology":"Delta Junction sits near the glacially-fed Tenana River, which drains the north slope of the Alaska Range. ","soils":"Soils at DEJU are typically eluvial deposits formed by weathering of the underlying parent material, which consists of gravelly glacial till and outwash covered by a thin layer of loess. Organic horizons vary in thickness across the site, with low, wet, frozen areas overlain by thick (\u003E20 cm) organic deposits. The soil is subgelic (-4\u00b0C - 0\u00b0C\/25\u00b0F - 32\u00b0F) with discontinuous permafrost, and there is evidence of cryoturbation in areas.","vegetation":"The predominant vegetation at Delta Junction is scrubby evergreen forest, where stunted trees like black spruce (Picea mariana), white spruce (Picea glauca) and American dwarf birch (Betula glandulosa, Betula nana) dominate the canopy. Vegetation at the site varies with differences in elevation and drainage; well-drained, upland zones feature quaking aspens (Populus tremuloides) and white spruce, while areas with poor drainage host sedges, mosses, and low-growing shrubs like lingonberry (Vaccinium vitis-idaea), crowberry (Empetrum nigrum), bog blueberry (Vaccinium uliginosum), bog Labrador tea (Ledum palustre), false toadflax (Geocaulon lividum), and bearberry (Arctostaphylos uva-ursi)."},"geographic":{"boundaries":"POLYGON ((-145.748171335 63.911103153, -145.748261334 63.882456153, -145.714556335 63.882573153, -145.715303333 63.867849153, -145.715366334 63.859992154, -145.732196335 63.859929153, -145.733186334 63.823965153, -145.764614334 63.824127153, -145.764650334 63.868029153, -145.781498334 63.867966153, -145.781831333 63.874923154, -145.797671335 63.874779153, -145.797257334 63.925116153, -145.797563334 63.939921153, -145.781696333 63.940065153, -145.747928333 63.940200153, -145.748657335 63.925467154, -145.748171335 63.911103153))","coordinates":"POINT (-145.75136 63.88112)","country":["United States of America"],"elevation":{"avg":517,"min":444,"max":581,"unit":"msl"},"size":{"value":2990,"unit":"ha"},"relatedLocations":null},"focusDesignScale":{"experiments":{"design":"mainly experimentation","scale":"beyond catchment scale"},"observations":{"design":"mainly observation","scale":"beyond catchment"},"observedProperties":[{"label":"DNA sequence","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/21400"},{"label":"above ground biomass","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22025"},{"label":"air temperature","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22035"},{"label":"atmospheric parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20937"},{"label":"biological parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20940"},{"label":"chemical parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/10333"},{"label":"ecosystem parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20939"},{"label":"genetic parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20942"},{"label":"heat flux","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22130"},{"label":"land cover","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22142"},{"label":"landscape parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20943"},{"label":"latent heat","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22154"},{"label":"leaf area index","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22157"},{"label":"ozone concentration","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22178"},{"label":"plant diversity","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22191"},{"label":"precipitation intensity","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/22204"},{"label":"soil carbon dioxyde flux","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/21939"},{"label":"soil moisture content","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/10039"},{"label":"soil parameter","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/20944"},{"label":"species abundance","uri":"http:\/\/vocabs.lter-europe.net\/EnvThes\/10018"}]},"infrastructure":{"accessibleAllYear":true,"accessType":null,"allPartsAccessible":null,"maintenanceInterval":null,"permanentPowerSupply":false,"operation":{"permanent":false,"notes":null,"siteVisitInterval":null},"notes":null,"collection":null,"data":{"policy":{"url":null,"rights":null,"notes":null}}},"relatedResources":null,"projectRelated":{"lter":{"lterSiteClassification":null}}}}