Laboratory Studies of Tropospheric Sulfur Chemistry
{'Code': '06020104', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'AGS', 'LongName': 'Div Atmospheric & Geospace Sciences'}}
{'SignBlockName': 'Jarvis L. Moyers', 'PO_EMAI': None, 'PO_PHON': None}
The atmospheric sulfur cycle has been the subject of                       intensive investigation in recent years because of the need to                  assess the contribution of anthropogenically produced sulfur to                 such problems as acid rain, visibility reduction, and climate                   modification.  In heavily industrialized regions such as the                    eastern United States and western Europe, anthropogenic sulfur                  magnitude.  On a global scale, however, natural sulfur                          emissions are thought approximately to equal those from                         anthropogenic sources.  An understanding of the natural sulfur                  cycle is thus required in order to establish a "base line" with                 which anthropogenic perturbations can be compared.  A                           substantial measurement data base for the key reduced sulfur                    species CS2, COS, and CH3SCH3 (DMS) has become available in                     recent years.  Laboratory research aimed at identifying major                   sulfur oxidation pathways and quantifying the rates of these                    pathways has also progressed rapidly.  Nonetheless, major                       uncertainties in the atmospheric chemistry of organosulfur                      compounds remain.                                                                    This research is aimed at elucidating the kinetics and                     reaction mechanisms which control the atmospheric oxidation of                  reduced sulfur compounds, i.e. H2S, CS2, COS, mercaptans,                       sulfides and disulfides.  Direct observation of reactive                        intermediates and relatively stable products in "real time" is                  emphasized because only through such observations can results                   with a unique interpretation be obtained.  Some specific                        experimental investigations which are to be undertaken include                  kinetics studies of CH2S reactions with O3, HO2, and NO2,                       kinetics studies of IO reactions with thiols, sulfides, and                     disulfides, determination of the product yields of SH, CS, S2,                  HO2, COS, CO, and CO2 from the CS2OH+O2 reaction, determination                 of CH3S yields from reactions of OH and NO3 with organosulfur                   compounds, kinetic studies of the reactions of OH and NO3 with                  dimethylsulfoxide, and investigations of the mechanisms for                     producing the stable end products SO2, CH3SO3H, and (CH3)2SO                    via the OH-, NO3-, and IO-initiated oxidations of organosulfur                  compounds.  The experimental methods to be employed involve                     coupling laser flash photolysis production of unstable                          reactants with time resolved detection of intermediates and                     end products by laser induced fluorescence, long path                           UV-visible absorption, or long path infrared absorption.                        Most experiments will be carried out under atmospheric                          conditions of temperature, pressure, and gas composition.
[{'FirstName': 'Paul', 'LastName': 'Wine', 'PI_MID_INIT': 'H', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Paul H Wine', 'EmailAddress': 'paul.wine@chemistry.gatech.edu', 'NSF_ID': '000328232', 'StartDate': '04/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Anthony', 'LastName': 'Hynes', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Anthony J Hynes', 'EmailAddress': 'ahynes@rsmas.miami.edu', 'NSF_ID': '000462116', 'StartDate': '04/15/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'Georgia Tech Research Corporation - GA Tech Research Institute', 'CityName': 'ATLANTA', 'ZipCode': '303186395', 'PhoneNumber': '4048941222', 'StreetAddress': '926 DALNEY ST NW', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Georgia', 'StateCode': 'GA', 'CONGRESSDISTRICT': '05', 'CONGRESS_DISTRICT_ORG': 'GA05', 'ORG_UEI_NUM': 'EMW9FC8J3HN4', 'ORG_LGL_BUS_NAME': 'GEORGIA TECH RESEARCH CORP', 'ORG_PRNT_UEI_NUM': 'EMW9FC8J3HN4'}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '152400', 'Text': 'Atmospheric Chemistry'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8802386.xml'}