{"status": "Complete", "organizations": [{"category": "Academic", "logo_name": "09_20_38_65_EPSCoR_300x300.png", "name": "EPSCoR - Alaska Adapting to Changing Environments", "description": "Experimental Program to Stimulate Competitive Research - A nationwide research funding program administered by the National Science Foundation.    http://www.alaska.edu/epscor/"}, {"category": "Federal", "logo_name": "6jc8g1ukz3_NSF.png", "name": "National Science Foundation", "description": "The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 \"to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense\u2026\""}], "links": [{"url": "http://www.sciencedirect.com/science/article/pii/S0016703714005018", "category": "Website", "display_text": "Publisher Website"}], "collections": [{"hidden": false, "name": "Southeast Test Case", "description": null}], "description": "The Tibetan Plateau is the world\u2019s largest and highest plateau and holds the largest mass of ice on Earth outside the ice-sheets of Greenland and Antarctica, as well as abundant lakes. This study examined the molecular and isotopic signatures of dissolved organic matter (DOM) along with its biolability in glacier ice, glacier-fed streams, and alpine lakes on the Tibetan Plateau. The aim was to assess the sources of DOM and the potential of DOM to provide a carbon subsidy to downstream ecosystems. Tibetan glaciers and glacier streams exhibited low dissolved organic carbon (DOC) concentrations (17.7\u201327.9 \u03bcM) and ancient DOC radiocarbon ages (749\u20132350 ybp). The optical properties, stable carbon isotope ratios (\u03b413C-DOC) and the molecular composition (Fourier transform ion cyclotron resonance mass spectrometry) of Tibetan glacier DOM are consistent with data from other glacier systems around the world. The geochemical signatures and the ancient apparent ages of Tibetan glacier DOM suggest a significant fraction is derived from the atmospheric deposition of pre-aged, possibly fossil fuel derived organics. Within the Tibetan alpine lakes, DOC was also ancient (525\u2013675 ybp), due to either inputs of pre-aged organics from glacier runoff, direct deposition, or due to the aging of organics in situ (i.e. a radiocarbon reservoir effect). The glacier ice and glacier stream sites exhibited high biolability of DOC and so provide a carbon subsidy to downstream environments that will change as glaciers on the Tibetan Plateau recede.", "end_date": null, "title": "Source and biolability of ancient dissolved organic matter in glacier and lake ecosystems on the Tibetan Plateau", "other_contacts": [], "iso_topics": ["012"], "tags": ["Tibetan Plateau", "lake eocsystems", "ancient dissolved organic matter", "biolability", "glacier ecosystems"], "bounds": [{"geom": "{\"type\":\"Point\",\"coordinates\":[-134.6429810506555,58.38554000567375]}", "type": "Attachment"}], "start_date": null, "regions": ["Southeast"], "other_agencies": "National Science Foundation", "data_types": [{"name": "Report", "description": null}], "archived_at": null, "primary_contacts": [{"phone": null, "name": "Sanjay Pyare", "email": "sanjay.pyare@uas.alaska.edu"}], "type": {"color": "#c09853", "name": "Project", "description": "catalog record for projects with no associated data/observation files"}, "slug": "source-and-biolability-of-ancient-dissolved-organic-matter-in-glacier-and-lake-ecosystems-on-the-tibetan-plateau", "attachments": [{"category": "Geojson", "file_name": "imported_locations", "description": "gLynx locations", "file_size": 157}]}