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"Ocean mixed layer variation by MJOs during Pre-YMC2015 & YMC2017" Moteki MSJ Spring 180517 @ Tsukuba

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"Ocean mixed layer variation by MJOs during Pre-YMC2015 & YMC2017" Moteki MSJ Spring 180517 @ Tsukuba

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"Ocean mixed layer variation by MJOs during Pre-YMC2015 & YMC2017" Moteki MSJ Spring 180517 @ Tsukuba

  1. 1. 海洋研究開発機構 大気海洋相互作用研究分野 茂木 耕作 勝俣昌己 米山邦夫 安藤健太郎 長谷川拓也 Pre-YMCとYMC期間中の MJO通過に伴う スマトラ西方沖縁辺海の 海洋混合層変動
  2. 2. Pre-YMC 2015/11/23-12/17 YMC 2017/12/5-1/1
  3. 3. passed over Mirai on 12/13 passed over 1 week before YMC2017Pre-YMC2015 R/V Mirai location / MJO phase
  4. 4. YMC2017 MR1708 Pre-YMC2015 MR1504 before MJO after MJO weak easterly winds<5m/s SST>30℃ strong westerly winds>10m/s SST<29℃ ocean mixed layer depth <->SST->CAPE/CIN
  5. 5. YMC2017Pre-YMC2015 before MJO after MJO high SST cooled SST ECCO2-SST : JRA55-Usfc
  6. 6. YMC2017Pre-YMC2015 before MJO after MJO high SST week easterly cooled SST strong westerly MJ O MJ O MJ O ECCO2-SST : JRA55-Usfc
  7. 7. YMC2017Pre-YMC2015 before MJO after MJO 24h running mean shallow ML/IL thin BL deep IL fluctuating ML/BL
  8. 8. YMC2017Pre-YMC2015 before MJO after MJO high SST well mixed T T10m-depth: SST+1〜2℃ T inversion
  9. 9. YMC2017Pre-YMC2015 before MJO after MJO smaller heat loss larger LHF(〜✖3)
  10. 10. YMC2017Pre-YMC2015 before MJO after MJO CAPE(1268 J/kg) LCL(948 hPa) CAPE(612 J/kg) LCL(930 hPa)
  11. 11. YMC2017Pre-YMC2015 before MJO after MJO CIN(-11) LFC(895) CIN(-20) LCL(863)
  12. 12. YMC2017Pre-YMC2015 before MJO after MJO strong salinity stratification mixed in IL
  13. 13. YMC2017Pre-YMC2015 before MJO after MJO phytoplankton going down slowly frequent up-down
  14. 14. YMC2017Pre-YMC2015 before MJO after MJO 1 cast / day shallow ML/IL thin BL more turbulent 8casts daily mean
  15. 15. YMC2017Pre-YMC2015 before MJO after MJO slow current variable current
  16. 16. YMC2017Pre-YMC2015 before MJO after MJO southward flow rotational flow
  17. 17. YMC2017Pre-YMC2015 before MJO after MJO alongshore flow alongshore eddies
  18. 18. YMC2017 MR1708 Pre-YMC2015 MR1504 before MJO after MJO higher T lower S shallow ML more calm lower T higher S fluctuating ML more turbulent 1.5℃ 2psu 80m 10-2
  19. 19. YMC2017 MR1708 Pre-YMC2015 MR1504 before MJO after MJO lower LCL large CAPE small CIN well mixed alongshore flow higher LCL small CAPE large CIN T inversion alongshore eddies 18hPa ×2 1/2 surface
  20. 20. YMC2017Pre-YMC2015 after MJO before MJO alongshore eddies alongshore flow
  21. 21. YMC2017Pre-YMC2015 before MJO after MJO thin BLT: shallow IL thick BLT: deep IL ECCO2-BLT, ocean current [45-155m]
  22. 22. YMC2017Pre-YMC2015 before MJO after MJO oceanic downwelling Kelvin wave oceanic Kelvin waves MJ O MJ O MJ O ECCO2-SLA : JRA55-Usfc
  23. 23. YMC2017Pre-YMC2015 before MJO after MJO shallow ML/IL thin BL deep IL fluctuating ML/BL
  24. 24. YMC2017Pre-YMC2015
  25. 25. YMC2017Pre-YMC2015
  26. 26. YMC2017Pre-YMC2015 before MJO after MJO slow current variable current S N S N S N
  27. 27. YMC2017Pre-YMC2015 before MJO after MJO slow current variable current S N S N S N
  28. 28. 「みらい」観測域をMJOが通過 2015/12/1300Z MR15-04で観測されたMJO Global-IR
  29. 29. 観測 ECCO2 OFES2 ref. dep. = 12.5mref. dep. = 15mref. dep. = 10m 塩分過小〜0.2psu 水温過大〜0.2K 塩分過大〜2psu 水温過小〜1K
  30. 30. ARGO
  31. 31. ARGO
  32. 32. ARGO
  33. 33. 高いSST(30℃) 2015/12/1300Z MJO発生下でのSST NOAA
  34. 34. 低塩域(< 33psu) 2015/12/1300Z MJO発生下での表層塩分 ECCO2
  35. 35. MJO MLD ILD BLT depth(m) ILD(⊿T=0.2℃) MLD (⊿σ[⊿T=0.2℃])

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