Impacts of Vertical Structure of Large-Scale Vertical Motion in Tropical Climate: Moist Static Energy Framework

Bui, Hien X.; Yu, Jingshan; Chou, Chia

doi:10.1175/jas-d-16-0031.1

Cited by 24 publications

(32 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A recent study by Bui et al (2016) indicated that the very different results of the vertical transport of moist static energy (MSE) between the western and eastern Pacific ITCZs (e.g., positive column-integrated vertical MSE transport in the western Pacific and negative column-integrated vertical MSE transport in the eastern Pacific) should come from different shapes of vertical motion in these two regions.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…The motivation behind this design was to highlight the relationship between the vertical structure of convection and precipitation intensity in a climatological (or statistical) sense (Bui et al 2016). Even though there are many studies focusing on the time-mean rainfall patterns [Neelin (2007) and reference therein], investigation on changes of precipitation characteristics is needed, especially when the intensity and frequency of both heavy and light precipitation events…”

Section: The Dependence Of Convective Vertical Structure On Precipitamentioning

confidence: 99%

“…Following Bui et al (2016), two target domains over the western and the eastern Pacific ITCZs are selected as shown by the rectangular boxes in Fig. 5.…”

Section: Contrast Between Western and Eastern Pacific Itczsmentioning

confidence: 99%

“…The brackets ⟨ ⟩ denotes a mass integration through the troposphere, typically from 1000 hPa to the tropopause. Here, the tropopause level is fixed at 100 hPa as in previous studies (Chen et al 2016;Bui et al 2016). In (3), precipitation P is balanced by the vertical moisture advection, −⟨ p q⟩ , the horizontal moisture advection, −⟨ · ∇q⟩ , and the surface evaporation, E. Fig.…”

Section: The Moisture Budget Analysismentioning

confidence: 99%

“…It is thus worth knowing how the model's spatial resolution impacts the vertical structure of convection in the Tropics because the efficiency of moist static energy export by cumulus convection depends largely on the structure of convection (Back and Bretherton 2006;Bui et al 2016).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Impacts of model spatial resolution on the vertical structure of convection in the tropics

Bui

Chou

2018

Clim Dyn

Self Cite

View full text Add to dashboard Cite

This study examined the impacts of model horizontal resolution on vertical structures of convection in the tropics by performing sensitivity experiments with the NCAR CESM1. It was found that contributions to the total precipitation between top-heavy and bottom-heavy convection are different among various resolutions. A coarser resolution tends to produce a greater contribution from top-heavy convection and, as a result, stronger precipitation in the western Pacific ITCZ; while there is less contribution from bottom-heavy convection and weaker precipitation in the eastern Pacific ITCZ. In the western Pacific ITCZ, where the convection is dominated by a top-heavy structure, the stronger precipitation in coarser resolution experiments is due to changes in temperature and moisture profiles associated with a warmer environment (i.e., thermodynamical effect). In the eastern Pacific ITCZ, where the convection is dictated by a bottom-heavy structure, the stronger precipitation in finer resolution experiments comes from changes in convection structure (i.e., dynamic effect) which favors a greater contribution of bottom-heavy convection as the model resolution goes higher. The moisture budget analysis further suggested that the very different behavior in precipitation tendencies in response to model resolution changes between the western and eastern Pacific ITCZs are determined mainly by changes in convective structure rather than changes in convective strength. This study pointed out the importance of model spatial resolution in reproducing a reasonable contribution to the total precipitation between top-heavy and bottom-heavy structure of convection in the tropical Pacific ITCZs.

show abstract

Section: Summary and Discussionmentioning

confidence: 99%

Section: The Dependence Of Convective Vertical Structure On Precipitamentioning

confidence: 99%

“…Following Bui et al (2016), two target domains over the western and the eastern Pacific ITCZs are selected as shown by the rectangular boxes in Fig. 5.…”

Section: Contrast Between Western and Eastern Pacific Itczsmentioning

confidence: 99%

Section: The Moisture Budget Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impacts of model spatial resolution on the vertical structure of convection in the tropics

Bui

Chou

2018

Clim Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

Processes behind the decrease in Congo Basin precipitation during the rainy seasons inferred from ERA‐5 reanalysis

Kenfack,

Tamoffo,

Tchotchou

et al. 2024

Intl Journal of Climatology

View full text Add to dashboard Cite

The ongoing Congo Basin drying is linked to decreasing atmospheric water vapour. To comprehend the processes reducing precipitation, we analysed water and Moist Static Energy components, associated with heating sources using ERA5 reanalysis data over the period 1981–2022. The findings reveal that the precipitation deficit in the Congo Basin during March–April–May and September–October–November is primarily attributed to a decreasing trend in the vertical moisture advection anomaly induced by vertical velocity anomalies. Following this, a horizontal moisture advection anomaly induced by specific humidity anomalies plays a significant role. However, evaporation, horizontal moisture advection anomalies induced by wind anomalies, and vertical moisture advection anomalies induced by specific humidity anomalies do not appear to contribute significantly to the drying trend in the region. The horizontal propagation of MSE advection anomalies exhibits a similar pattern to that of moisture flux advection anomalies, both at different boundaries and within the basin itself. Conversely, the contribution of vertical advection of MSE anomalies remains weak. By integrating moisture and MSE budgets, we interpret the declining precipitation trend as a consequence of uplift driven by horizontal MSE advection. Furthermore, our analysis indicates a decreasing trend in the atmospheric heating source within the basin in association with reduced precipitation. This reduction could signify a decrease in moisture influx into the basin, thereby providing more explanations for the observed drying.

show abstract

Evaluation of convective storms using spaceborne radars over the Indo‐Gangetic Plains and western coast of India

Mangla

Indu

Lakshmi

2020

Meteorological Applications

View full text Add to dashboard Cite

Monsoonal convective systems are examined using four years (2014)(2015)(2016)(2017) of radar reflectivity data from the Precipitation Features (PFs) database of the Global Precipitation Measurement (GPM) Microwave Imager (GMI) and Dual Precipitation Radar (DPR). The study classifies the cumulonimbus tower (PF-CbT) at 12 km, and intense convective clouds at both 3 km (PF-ICC3) and 8 km (PF-ICC8) based on PFs' reflectivity threshold at a reference height over the Indo-Gangetic Plains (IGP) and Indian Western coastal (WG) region, including the Arabian Sea and the Western Ghats. Results show that the regional variations are more enhanced for the PF-ICC3 clouds with high occurrence over the IGP region. In the mixed-phase regime, the median maximum reflectivity is greater for all cloud types over the IGP region. The occurrences of 20 and 40 dBZ echo the top height > 5 km is higher in the IGP region, indicating the deep and intense convection. The aerosol-cloud interaction is examined for warm and mixed-phase clouds. The vertical structure of aerosols shows the suppression of warm rainfall over the IGP region. However, rainfall intensity increases in mixed-phase clouds because of the dominancy of ice processes. The significant positive (negative) correlation is observed between the echo top height and aerosol concentrations over the IGP (WG) region. The value of the novel findings clearly states the region-specific demand for a closer examination of the radar reflectivity-aerosol interaction on regime-dependent clouds over the IGP region as well as contrasts against other regions for similar and contrasting cloud-aerosol-radiation interactions.

show abstract

Impacts of Vertical Structure of Large-Scale Vertical Motion in Tropical Climate: Moist Static Energy Framework

Cited by 24 publications

References 34 publications

Impacts of model spatial resolution on the vertical structure of convection in the tropics

Impacts of model spatial resolution on the vertical structure of convection in the tropics

Processes behind the decrease in Congo Basin precipitation during the rainy seasons inferred from ERA‐5 reanalysis

Evaluation of convective storms using spaceborne radars over the Indo‐Gangetic Plains and western coast of India

Contact Info

Product

Resources

About