Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0226.1 |
Interactions between Moisture and Tropical Convection. Part II: The Convective Coupling of Equatorial Waves | |
Wolding, Brandon1; Dias, Juliana1; Kiladis, George1; Maloney, Eric2; Branson, Mark2 | |
2020-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:5页码:1801-1819 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The exponential increase in precipitation with increasing column saturation fraction (CSF) is used to investigate the role of moisture in convective coupling. This simple empirical relationship between precipitation and CSF is shown to capture nearly all MJO-related variability in TRMM precipitation, similar to 80% of equatorial Rossby wave-related variability, and similar to 75% of east Pacific easterly wave-related variability. In contrast, this empirical relationship only captures roughly half of TRMM precipitation variability associated with Kelvin waves, African easterly waves, and mixed Rossby-gravity waves, suggesting coupling mechanisms other than moisture are playing leading roles in these phenomena. These latter phenomena have strong adiabatically forced vertical motions that could reduce static stability and convective inhibition while simultaneously moistening, creating a more favorable convective environment. Cross-spectra of precipitation and column-integrated dry static energy show enhanced coherence and an out-of-phase relationship in the Kelvin wave, mixed Rossby-gravity wave, and eastward inertio-gravity wave bands, supporting this narrative. The cooperative modulation of precipitation by moisture and temperature anomalies is shown to shorten the convective adjustment time scale (i.e., time scale by which moisture and precipitation are relaxed toward their "background" state) of these phenomena. Speeding the removal of moisture anomalies relative to that of temperature anomalies may allow the latter to assume a more important role in driving moist static energy fluctuations, helping promote the gravity wave character of these phenomena. |
英文关键词 | Convective adjustment Convective clouds Large-scale motions Waves atmospheric Intraseasonal variability Tropical variability |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000535703800015 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; AFRICAN EASTERLY WAVES ; STATIC ENERGY BUDGET ; KELVIN WAVES ; STRATIFORM INSTABILITY ; PRECIPITATION ; PARAMETERIZATION ; MJO ; TEMPERATURE ; DYNAMICS |
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/280344 |
专题 | 地球科学 |
作者单位 | 1.NOAA, Div Phys Sci, Earth Syst Res Lab, Boulder, CO 80305 USA; 2.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Wolding, Brandon,Dias, Juliana,Kiladis, George,et al. Interactions between Moisture and Tropical Convection. Part II: The Convective Coupling of Equatorial Waves[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(5):1801-1819. |
APA | Wolding, Brandon,Dias, Juliana,Kiladis, George,Maloney, Eric,&Branson, Mark.(2020).Interactions between Moisture and Tropical Convection. Part II: The Convective Coupling of Equatorial Waves.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(5),1801-1819. |
MLA | Wolding, Brandon,et al."Interactions between Moisture and Tropical Convection. Part II: The Convective Coupling of Equatorial Waves".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.5(2020):1801-1819. |
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