Climate variability in the Atlantic dissertation proposal Jiande Wang

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Climate variability in the Atlanticdissertation
proposalJiande Wang

• My background
• Identification of the problem
• Objectives hypotheses
• Proposed activities
• Timetable

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My background

• 1984.8-1991.6 Study in Nanjing Inst.of
  Meteorology(NIM), Dept. of Meteorology, Master
  degree received
• 1991.6-1997.6 Teaching undergraduate level
  courses on meteorology in NIM
• 1997.8-present Graduate study in UM, master
  degree received in 1999.5

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Publications

• Feature and driving mechanism of mid-low latitude
  low-frequency oscillation in summer. Journal of
  Nanjing Inst. of Meteorology. Vol.16, No.4, 1993.
  (first author)
• The influence of convective activities over south
  China sea on the northern hemisphere mid-low
  latitude atmosphere and its possible mechanism.
  Tropical Meteorology. Vol.10, No.2, 1994. (first
  author)
• The relationship between winter monsoon
  circulation and atmospheric heating field of
  eastern Asia. Scientia Meteorological Sinica,
  Vol.14, No.2, 1994. (first author)
• Comparative study of diabatic heating in
  anomalous plum-rain year. Journal of Nanjing
  Inst. of Meteorology. Vol.19 No.2,1996. (first
  author).

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Publications

• Relation of southern China precipitation to large
  scale water transporting flow and atmospheric
  heating field. Journal of Nanjing Inst. of
  Meteorology. Vol.17, No.2, 1994. (second author)
• Three-dimensional vertical circulation
  low-frequency oscillation feature of eastern
  Asian winter monsoon. Journal of Nanjing Inst. of
  Meteorology. Vol.17, No.3, 1994. (second author)
• Low-frequency oscillation and mechanism of
  vertical circulation of eastern Asian summer
  monsoon. ACTA Meteorological Sinica. Vol.7, No.2,
  1993. (third author)

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Importance of climate variability

• Flooding in Venezuela when
• Connection to SST anomalies where?

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Previous research

• Observational evidence of correlation Hastenrath
  and Heller, 1977 Lamb, 1978 Chu and Hastenrath,
  1981 Moura and Shukla, 1981 Folland, 1986
  Wagner and da Silva, 1993 Enfield, 1996
• Existence of coupled modes Merle, 1980 Zebiak,
  1993 Carton and Huang, 1994 Hastenrath and
  Greischar, 1993 Carton et al., 1996 Houghton et
  al., 1992 Ruiz-Barradas, et al. (2000)
• Failure of simple models Chung, Carton, and Nigam
  (2000)
• Calculating heat transport Jung, 1952 Oort,
  1976 Wang and Carton, 2000

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Scientific Objectives

• Improve understanding of atmospheric response to
  local and remote SSTA
• Building the relationship between HT and climate
  mode

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Proposed activities

• Examination of AMIP-II AGCMs and possibly other
  AGCM runs to discern the response of the
  atmosphere to anomalous SST
• Examination of Atlantic Ocean heat transport as
  represented in oceanic reanalyses

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Examination of the response of the atmosphere to
anomalous SST

• Need to examine multiple AGCMs
• Model-dependence
• Statistical approach advantages/disadvantages
• REOF
• Examination of events advantages/disadvantages
• Implications for predictability
• Ensemble mean and variance

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Results from two simulationsmy results

• Models
• NCAR
• UKMO
• Comparison
• Seasonal cycle
• Atlantic Nino mode
• Interhemispheric mode

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Seasonal cycle
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Atlantic Nino
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Interhemispheric mode
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Examination of the response of the ocean to
anomalous winds and heating (the heat transport
problem)my results

• Climatological seasonal heat storage and
  transport divergence a comparison
• Interannual variability of heat transport not
  shown

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Climatological seasonal heat transport
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Timetable

• Examine of AMIP II AGCMs output 6 months
• Examine the predicatability of variability 3
  months
• Examine the relationship between HT and climate
  modes 3 months
• Write up the results 6 months
• Total 18 months