HR: 0830h
AN: A31D-0084    [PDF]
TI: Relationships between crustal records from three ice cores in West Antarctica and atmospheric circulation
AU: Yan, Y
EM: yyan@maine.edu
AF: Climate Change Institute, University of Maine, Orono, ME 04469 United States
AU: Yan, Y
EM: yyan@maine.edu
AF: School of Marine Sciences, University of Maine, Orono, ME 04469 United States
AU: Yan, Y
EM: yyan@maine.edu
AF: Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, 260 Donggang west Rd, Lanzhou, GS 730000 China
AU: Mayewski, P A
EM: paul.mayewski@maine.edu
AF: Climate Change Institute, University of Maine, Orono, ME 04469 United States
AU: Mayewski, P A
EM: paul.mayewski@maine.edu
AF: Department of Earth Sciences, University of Maine, Orono, ME 04469 United States
AU: * Kang, S
EM: shichang.kang@maine.edu
AF: Climate Change Institute, University of Maine, Orono, ME 04469 United States
AU: * Kang, S
EM: shichang.kang@maine.edu
AF: Cold and Arid Regions Environment and Engineering Institute, Chinese Academy of Sciences, 260 Donggang west Rd, Lanzhou, GS 730000 China
AU: Meyerson, E
EM: eric.meyerson@maine.edu
AF: Climate Change Institute, University of Maine, Orono, ME 04469 United States
AB: Using NCEP/NCAR Reanalysis data, we investigate the relationships between crustal ion (nssCa2+: non sea-salt Ca2+) concentrations from three West Antarctica ice cores: Siple Dome (SD), ITASE00-1 (IT001) and ITASE01-5 (IT015), and the climatic factors: air pressure/geopotential height, zonal (u) and meridional (v) wind strength. Linear correlation analyses between nssCa2+ concentrations and air pressure, wind fields for the recent 50 years indicate that the SD nssCa2+ variation is positively correlated with spring (SON) circumpolar zonal wind, while the IT001 nssCa2+ has positive correlation with circumpolar zonal wind during the whole year (r$>0.3$, p$<0.01$). Intensified Southern Westerlies circulation is conducive to transport more crustal aerosols to both sites. Further correlation analyses between nssCa2+ concentrations and atmospheric circulation for SD and IT001 suggest that the high inland plateau (e.g. IT001) is largely influenced by the transport from the upper troposphere. The IT015 nssCa2+ is negative correlated with westerly wind in October and November, suggesting that the stronger westerly circulation may weaken the transport of crustal species to IT015. Results of correlation of nssCa2+ in three ice cores with Antarctic Oscillation (AAO) index are agreed well with those of winds. NssCa2+ concentrations are also related to ENSO variability in which higher crustal species corresponds with stronger ENSO event.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 3349 Polar meteorology
DE: 9310 Antarctica
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting