Atmospheric Radionuclides in South Central Greenland
{'Code': '01020306', 'Directorate': {'Abbreviation': 'O/D', 'LongName': 'Office Of The Director'}, 'Division': {'Abbreviation': 'OPP', 'LongName': 'Office of Polar Programs'}}
{'SignBlockName': 'Bernhard Lettau', 'PO_EMAI': None, 'PO_PHON': None}
This project is a study of the processes that are active in determining         the characteristics of aerosols that are removed from the arctic                atmosphere and deposited in the Greenland ice sheet.  These processes           involve the dynamics of tropospheric and stratospheric mass exchange,           the efficiency with which aerosols and associated chemical species are          removed from the lower atmosphere, the relative importance of wet and           dry deposition, and the early post-depositional chemical and                    concentration changes in the snow.  Knowledge of these processes is             crucial to the reconstruction of paleoatmospheres from the record that          is preserved in the ice sheet.                                                                                                                                  Air sample filters and snow and ice samples collected in a year-long            effort at Dye-3 in southern Greenland will be analyzed for                      radionuclides, including Beryllium-7, Beryllium-10, Chlorine-36, and            Lead-210.  Beryllium-7 is a cosmogenic radionuclide that is useful as a         tracer of intrusions of stratospheric air, while Lead-210 results from          the decay of radon emitted from the Earth's surface and is a tracer for         continental air masses.  While Chlorine-36 is an important modulator in         ozone chemistry, its ratio to Beryllium-10 may possibly become a method         for dating ice cores older than 50,000 years.  Results to date have been        mixed because the ratio can fluctuate greatly over small depth                  intervals.  This project however will obtain data on time scales short          enough to determine whether short term differences in the transport             mechanism or seasonal variations in the efficiency of the removal               process cause the observed fluctuations.
{'FirstName': 'Jack', 'LastName': 'Dibb', 'PI_MID_INIT': 'E', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Jack E Dibb', 'EmailAddress': 'jack.dibb@unh.edu', 'NSF_ID': '000118707', 'StartDate': '03/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of New Hampshire', 'CityName': 'DURHAM', 'ZipCode': '038242620', 'PhoneNumber': '6038622172', 'StreetAddress': '51 COLLEGE RD', 'StreetAddress2': 'BLDG 107', 'CountryName': 'United States', 'StateName': 'New Hampshire', 'StateCode': 'NH', 'CONGRESSDISTRICT': '01', 'CONGRESS_DISTRICT_ORG': 'NH01', 'ORG_UEI_NUM': 'GBNGC495XA67', 'ORG_LGL_BUS_NAME': 'UNIVERSITY SYSTEM OF NEW HAMPSHIRE', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '5280', 'Text': 'ANS-Arctic Natural Sciences'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8821960.xml'}