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DOI10.1175/JCLI-D-18-0334.1
Space-Time Spectral Analysis of the Moist Static Energy Budget Equation
Yasunaga, Kazuaki1; Yokoi, Satoru2; Inoue, Kuniaki3,4; Mapes, Brian E.5
2019
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2019
卷号32期号:2页码:501-529
文章类型Article
语种英语
国家Japan; USA
英文摘要

The budget of column-integrated moist static energy (MSE) is examined in wavenumber-frequency transforms of longitude-time sections over the tropical belt. Cross-spectra with satellite-derived precipitation (TRMM-3B42) are used to emphasize precipitation-coherent signals in reanalysis [ERA-Interim (ERAI)] estimates of each term in the budget equation. Results reveal different budget balances in convectively coupled equatorial waves (CCEWs) as well as in the Madden-Julian oscillation (MJO) and tropical depression (TD)-type disturbances. The real component (expressing amplification or damping of amplitude) for horizontal advection is modest for most wave types but substantially damps the MJO. Its imaginary component is hugely positive (it acts to advance phase) in TD-type disturbances and is positive for MJO and equatorial Rossby (ERn1) wave disturbances (almost negligible for the other CCEWs). The real component of vertical advection is negatively correlated (damping effect) with precipitation with a magnitude of approximately 10% of total latent heat release for all disturbances except for TD-type disturbance. This effect is overestimated by a factor of 2 or more if advection is computed using the time-zonal mean MSE, suggesting that nonlinear correlations between ascent and humidity would be positive (amplification effect). ERAI-estimated radiative heating has a positive real part, reinforcing precipitation-correlated MSE excursions. The magnitude is up to 14% of latent heating for the MJO and much less for other waves. ERAI-estimated surface flux has a small effect but acts to amplify MJO and ERn1 waves. The imaginary component of budget residuals is large and systematically positive, suggesting that the reanalysis model's physical MSE sources would not act to propagate the precipitation-associated MSE anomalies properly.


英文关键词Convection Convective clouds Kelvin waves Madden-Julian oscillation Rossby waves Waves atmospheric
领域气候变化
收录类别SCI-E
WOS记录号WOS:000454493900001
WOS关键词MADDEN-JULIAN OSCILLATION ; AFRICAN EASTERLY WAVES ; SYNOPTIC-SCALE DISTURBANCES ; COLUMN WATER-VAPOR ; TROPICAL CONVECTION ; PART I ; INTRASEASONAL VARIABILITY ; CLOUD-RADIATION ; DEEP CONVECTION ; MODEL
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/19659
专题气候变化
作者单位1.Univ Toyama, Dept Earth Sci, Grad Sch Sci & Engn, Toyama, Japan;
2.Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan;
3.NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA;
4.Univ Corp Atmospheric Res, Boulder, CO USA;
5.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Coral Gables, FL 33124 USA
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Yasunaga, Kazuaki,Yokoi, Satoru,Inoue, Kuniaki,et al. Space-Time Spectral Analysis of the Moist Static Energy Budget Equation[J]. JOURNAL OF CLIMATE,2019,32(2):501-529.
APA Yasunaga, Kazuaki,Yokoi, Satoru,Inoue, Kuniaki,&Mapes, Brian E..(2019).Space-Time Spectral Analysis of the Moist Static Energy Budget Equation.JOURNAL OF CLIMATE,32(2),501-529.
MLA Yasunaga, Kazuaki,et al."Space-Time Spectral Analysis of the Moist Static Energy Budget Equation".JOURNAL OF CLIMATE 32.2(2019):501-529.
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