Distribution of sulfur hexafluoride in the China sea-shelf boundary layer in spring
ZANG Kun-peng1,2,3, ZHOU Ling-xi1, LIU Yun-song1, CHENG Si-yang1
1. Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081, China;
2. Nanjing University of Information Science & Technology, Nanjing 210044, China;
3. Key laboratory for Ecological Environment in Coastal Areas(SOA), National Marine Environmental Monitoring Center, Dalian 116023, China
Abstract：The mole fraction of sulfur hexafluoride in the boundary layer of South Yellow Sea and East China Sea was observed based on discrete air samples collection and gas chromatography in spring of 2017.The mole fraction of sulfur hexafluoride ranged from 9.5×10-12 to 14.0×10-12, with an average value of(10.5±1.3)×10-12,and showed an significant variation with distance away from land.Combined the underway wind data and back trajectory simulations,the high mole fraction of sulfur hexafluoride in the boundary layer of northeast and southwest areas of East China Sea may influenced directly by land-sea air mass transport from Japan,Korea and southeast part of China,respectively,where the human activities was intensive.However,the low mole fraction of sulfur hexafluoride in the other areas may influence more by air masses transport from the open shelf seas and Pacific Ocean,respectively.This study would be beneficial to the further studies of the spatial-temporal distribution of other atmospheric compounds and their regulate mechanisms in the China sea-shelf boundary layer.
ZANG Kun-peng,ZHOU Ling-xi,LIU Yun-song et al. Distribution of sulfur hexafluoride in the China sea-shelf boundary layer in spring[J]. Marine Environmental Science, 2018, 37(3): 418-423.
WMO Greenhouse Gases Bulletin 2017.The State of Greenhouse Gases in the Atmosphere Based on Global Observations through 2016[R].[2018-1-11].http://library.wmo.int/opac/doc_num.php?explnum_id=4022.
[2]
BUSENBERG E,PLUMMER L N.Dating young groundwater with sulfur hexafluoride:Natural and anthropogenic sources of sulfur hexafluoride[J].Water Resource Research,2000,36:3011-3030.
[3]
STOCKER T F,QIN D,PLATTNER G K,et al.IPCC:Climate Change 2013:The Physical Science Basis.Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change[R].Cambridge,United Kingdom and New York,NY,USA:Cambridge University Press,2013,1535.
[4]
KO M K W,SZE N D,WANG W C,et al.Atmospheric sulfur hexafluoride:Sources,sinks and greenhouse warming[J].Journal of Geophysical Research,1993,98:10499-10507.
[5]
GELLER L S,ELKINS J W,LOBERT J M,et al.Tropospheric SF6:Observed Latitudinal distribution and trends,derived emissions and inter-hemispheric exchange time[J].Geophysical Research Letter,1997,24(6):675-678.
FANG X K,HU X,MAENHOUT G J,et al.Sulfur Hexafluoride (SF6) Emission Estimates for China:An Inventory for 1990-2010 and a Projection to 2020[J].Environmental Science Technology,2013,47:3848-3855.
BEY I,JACOB D J,LOGAN J A,et al.Asian chemical outflow to the Pacific in spring:origins,pathways,and budgets[J].Journal of Geophysical Research,2001,106(D19):23097-23113.
[12]
BARTLETT K B,SACHSE G W,HARWARD T S,et al.Large-scale distribution of CH4 in the western North Pacific:Sources and transport from the Asian continent.Journal of Geophysical Research,2003,108(D20):GTE 28(1-21).
[13]
ZANG K P,ZHOU L X,WANG J Y.Carbon Dioxide and Methane in the China Sea Shelf Boundary Layer Observed by Cavity Ring-Down Spectroscopy[J].Journal of Atmospheric and Oceanic Technology,2017,34:2233-2244.DOI:10.1175/JTECH-D-16-0217.1.
[14]
MAISS M,STEELE L P,FRANCEY R J,et al.Sulfur hexafluoride-A powerful new atmospheric tracer[J].Atmospheric Environment,1996,30:1621-1629.
[15]
WATSON A J,LEDWELL J R.Oceanographic tracer release experiments using sulfur hexafluoride[J].Journal of Geophysical Research,2000,105(C6):14325-14337.
[16]
CROSSON E R.A cavity ring-down analyzer for measuring atmospheric levels of methane,carbon dioxide and water vapor[J].Applied Physics B,2008,92:403-408.
ZHOU L X,LIU Y S,ZANG K P,et al.Atmospheric CO2,CH4,CO and N2O mixing ratios in the China sea-shelf boundary layer during the spring 2017 campaign[R].[2018-1-11].http://www.wmo.int/pages/prog/arep/gaw/ggmt2017.html
[20]
ZHANG F,ZHOU L X,XU L.Temporal variation of atmospheric CH4 and the potential source regions at Waliguan,China[J].Science China-Earth Sciences,2013,56:727-736.
