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热带大气ISO在几种再分析资料中的对比分析

丁莉 李清泉 刘芸芸

丁莉, 李清泉, 刘芸芸. 热带大气ISO在几种再分析资料中的对比分析. 应用气象学报, 2013, 24(3): 314-322..
引用本文: 丁莉, 李清泉, 刘芸芸. 热带大气ISO在几种再分析资料中的对比分析. 应用气象学报, 2013, 24(3): 314-322.
Ding Li, Li Qingquan, Liu Yunyun. The tropical atmospheric intra-seasonal oscillation with different reanalysis data. J Appl Meteor Sci, 2013, 24(3): 314-322.
Citation: Ding Li, Li Qingquan, Liu Yunyun. The tropical atmospheric intra-seasonal oscillation with different reanalysis data. J Appl Meteor Sci, 2013, 24(3): 314-322.

热带大气ISO在几种再分析资料中的对比分析

资助项目: 

国家高技术研究发展计划 2010AA012404

国家重点基础研究发展计划 2013CB430202

公益性行业 (气象) 科研专项 GYHY201106022

国家自然科学基金项目 41005037

国家自然科学基金项目 41175065

详细信息
    通信作者:

    李清泉, email: liqq@cma.gov.cn

The Tropical Atmospheric Intra-seasonal Oscillation with Different Reanalysis Data

  • 摘要: 利用NCEP/NCAR, NCEP/DOE和ERA40 3套再分析资料的逐日200 hPa纬向风数据,选取1961—1990年、1971—2000年和1981—2010年3种不同气候态,对比分析了3种气候态下热带大气季节内振荡 (ISO) 的基本气候特征及其在不同再分析资料中的异同。研究表明:1981—2010年气候态下,热带大气ISO冬春强、夏秋弱的年循环特征更加明显,东传短波能量增强,起始北传时间偏晚。NCEP/NCAR与NCEP/DOE资料所表征的热带大气ISO在空间分布、强度和能量传播方面的一致性较好。NCEP/NCAR资料反映的热带大气ISO强度在热带印度洋和热带西太平洋地区较ERA40资料偏弱,在赤道东太平洋地区较ERA40资料偏强;ERA40资料反映的热带大气ISO强度在12月—次年3月中旬较NCEP/NCAR资料偏强,而在3月中旬—11月偏弱;ERA40资料反映的热带大气ISO振荡位相较NCEP/NCAR资料超前10 d左右;NCEP/NCAR资料反映的东传谱能量弱于ERA40资料,西传能量强于ERA40资料;7月中旬,NCEP/NCAR资料反映的东亚地区大气ISO经向北传较ERA40资料偏晚。
  • 图  1  3种气候态下10°S~10°N平均200 hPa纬向风的功率谱值和0.05显著性水平检验曲线

    Fig. 1  Power spectrum (solid line) of 200 hPa zonal wind averaged between 10°S-10°N and test line of 0.05 level (dashed line) in three different climate states

    图  2  3种气候态下200 hPa纬向风20~100 d周期变化方差解释总方差的百分比

    (单位:%;阴影区为方差百分比不小于40%的区域)

    Fig. 2  Explained variance percentages of 200 hPa zonal wind by 20—100 d filtered in three different climate states

    (unit:%; explained variance percentages of shaded areas are not less than 40%)

    图  3  1961—1990年NCEPI与ERA40资料200 hPa纬向风20~100 d周期变化方差解释总方差的百分比差值

    (单位:%; 阴影区为偏差绝对值不小于2%的区域)

    Fig. 3  The difference of explained variance percentages of 200 hPa zonal wind by 20—100 d filtered between NCEPI and ERA40 data in 1961—1990

    (unit:%; the difference of shaded areas is not less than 2%)

    图  4  1981—2010年NCEPI资料200 hPa纬向风20~100 d周期变化方差解释总方差的百分比与1961—1990年的差值

    (单位:%; 阴影区为偏差绝对值不小于4%的区域)

    Fig. 4  The difference of explained variance of 200 hPa zonal wind by 20—100 d filtered between NCEPI data in 1981—2010 and 1961—1990

    (unit:%; the difference of shaded areas is not less than 4%)

    图  5  图 1,但为热带大气ISO指数的年循环时间序列

    Fig. 5  The same as in Fig. 1, but for the annual cycle time series of tropical ISO index

    图  6  图 2,但为200 hPa纬向风的空间-时间功率谱

    (横坐标表示向东为正值,向西为负值的波频率;纵坐标表示空间纬向波数;阴影区为功率谱能量不小于0.04 m2·s-2的区域)

    Fig. 6  The same as in Fig. 2, but for spatial-temporal spectrum of 200 hPa zonal wind

    (the horizontal axis represents wave frequency, positive value represents eastward propagation, negative value represents westward propagation; the vertical axis represents wave number, the spectrum of shaded areas is no less than 0.04 m2·s-2)

    图  7  3种气候态下200 hPa纬向风ISO沿120°E的纬度-时间剖面图 (单位:m/s)

    Fig. 7  Latitude-time section of 200 hPa zonal wind ISO along 120°E in three different climate states (unit:m/s)

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  • 收稿日期:  2012-10-02
  • 修回日期:  2013-02-25
  • 刊出日期:  2013-06-30

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