Observed large-scale structures and diabatic heating and drying profiles during TWP-ICE
Abstract
This study documents the characteristics of the large-scale structures and diabatic heating and drying profiles observed during the Tropical Warm Pool–International Cloud Experiment (TWP-ICE), which was conducted in January–February 2006 in Darwin during the northern Australian monsoon season. The examined profiles exhibit significant variations between four distinct synoptic regimes that were observed during the experiment. The active monsoon period is characterized by strong upward motion and large advective cooling and moistening throughout the entire troposphere, while the suppressed and clear periods are dominated by moderate midlevel subsidence and significant low- to midlevel drying through horizontal advection. The midlevel subsidence and horizontal dry advection are largely responsible for the dry midtroposphere observed during the suppressed period and limit the growth of clouds to low levels. During the break period, upward motion and advective cooling and moistening located primarily at midlevels dominate together with weak advective warming and drying (mainly from horizontal advection) at low levels. The variations of the diabatic heating and drying profiles with the different regimes are closely associated with differences in the large-scale structures, cloud types, and rainfall rates between the regimes. Strong diabatic heating and drying are seen throughout the troposphere during the active monsoon period whilemore »
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Centre for Australian Weather and Climate Research, Melbourne, VIC (Australia)
- Monash Univ., Melbourne, VIC (Australia)
- Stony Brook Univ., Stony Brook, NY (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab., Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1281695
- Report Number(s):
- LLNL-JRNL-410148
Journal ID: ISSN 0894-8755
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Climate
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 1; Journal ID: ISSN 0894-8755
- Publisher:
- American Meteorological Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; Madden-Julian oscillation; diabatic heating; rainfall; clouds; warm pool
Citation Formats
Xie, Shaocheng, Hume, Timothy, Jakob, Christian, Klein, Stephen A., McCoy, Renata B., and Zhang, Minghua. Observed large-scale structures and diabatic heating and drying profiles during TWP-ICE. United States: N. p., 2010.
Web. doi:10.1175/2009JCLI3071.1.
Xie, Shaocheng, Hume, Timothy, Jakob, Christian, Klein, Stephen A., McCoy, Renata B., & Zhang, Minghua. Observed large-scale structures and diabatic heating and drying profiles during TWP-ICE. United States. https://doi.org/10.1175/2009JCLI3071.1
Xie, Shaocheng, Hume, Timothy, Jakob, Christian, Klein, Stephen A., McCoy, Renata B., and Zhang, Minghua. 2010.
"Observed large-scale structures and diabatic heating and drying profiles during TWP-ICE". United States. https://doi.org/10.1175/2009JCLI3071.1. https://www.osti.gov/servlets/purl/1281695.
@article{osti_1281695,
title = {Observed large-scale structures and diabatic heating and drying profiles during TWP-ICE},
author = {Xie, Shaocheng and Hume, Timothy and Jakob, Christian and Klein, Stephen A. and McCoy, Renata B. and Zhang, Minghua},
abstractNote = {This study documents the characteristics of the large-scale structures and diabatic heating and drying profiles observed during the Tropical Warm Pool–International Cloud Experiment (TWP-ICE), which was conducted in January–February 2006 in Darwin during the northern Australian monsoon season. The examined profiles exhibit significant variations between four distinct synoptic regimes that were observed during the experiment. The active monsoon period is characterized by strong upward motion and large advective cooling and moistening throughout the entire troposphere, while the suppressed and clear periods are dominated by moderate midlevel subsidence and significant low- to midlevel drying through horizontal advection. The midlevel subsidence and horizontal dry advection are largely responsible for the dry midtroposphere observed during the suppressed period and limit the growth of clouds to low levels. During the break period, upward motion and advective cooling and moistening located primarily at midlevels dominate together with weak advective warming and drying (mainly from horizontal advection) at low levels. The variations of the diabatic heating and drying profiles with the different regimes are closely associated with differences in the large-scale structures, cloud types, and rainfall rates between the regimes. Strong diabatic heating and drying are seen throughout the troposphere during the active monsoon period while they are moderate and only occur above 700 hPa during the break period. The diabatic heating and drying tend to have their maxima at low levels during the suppressed periods. Furthermore, the diurnal variations of these structures between monsoon systems, continental/coastal, and tropical inland-initiated convective systems are also examined.},
doi = {10.1175/2009JCLI3071.1},
url = {https://www.osti.gov/biblio/1281695},
journal = {Journal of Climate},
issn = {0894-8755},
number = 1,
volume = 23,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}
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