Rain evaporation and moist patches in tropical boundary layers
Abstract
Moist patches are areas in the subcloud layer characterized by a positive water vapor anomaly compared to the environment and are considered important in triggering new convective cells. A correct understanding of the origin of the water vapor in these patches is, thus, essential to improving existing convective parameterizations. Recent studies have addressed this problem and have shown that contrary to what was previously thought, the main source of water vapor in moist patches are surface latent heat fluxes, instead of rain evaporation. This paper offers a different perspective to the topic, focusing on the origin only of the water vapor that makes moist patches anomalously moist when compared to the environment. Finally, it is found that near the surface, rain evaporation contributes half as much as latent heat fluxes, implying that a parameterization of the thermodynamic forcing should be more sensitive to environmental variables, like relative humidity, than recently suggested.
- Authors:
-
- Harvard Univ., Cambridge, MA (United States). Dept. of Earth and Planetary Sciences
- Harvard Univ., Cambridge, MA (United States). Dept. of Earth and Planetary Sciences. Harvard John A. Paulson School of Engineering and Applied Sciences
- Publication Date:
- Research Org.:
- Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1469334
- Grant/Contract Number:
- SC0008679; AGS-1062016; AGS-1260380
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 43; Journal Issue: 18; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; 54 ENVIRONMENTAL SCIENCES; cold pools; thermodynamic forcing; moist patches; tropical meteorology; deep convection; Lagrangian Particle Dispersion Model
Citation Formats
Torri, Giuseppe, and Kuang, Zhiming. Rain evaporation and moist patches in tropical boundary layers. United States: N. p., 2016.
Web. doi:10.1002/2016GL070893.
Torri, Giuseppe, & Kuang, Zhiming. Rain evaporation and moist patches in tropical boundary layers. United States. https://doi.org/10.1002/2016GL070893
Torri, Giuseppe, and Kuang, Zhiming. Wed .
"Rain evaporation and moist patches in tropical boundary layers". United States. https://doi.org/10.1002/2016GL070893. https://www.osti.gov/servlets/purl/1469334.
@article{osti_1469334,
title = {Rain evaporation and moist patches in tropical boundary layers},
author = {Torri, Giuseppe and Kuang, Zhiming},
abstractNote = {Moist patches are areas in the subcloud layer characterized by a positive water vapor anomaly compared to the environment and are considered important in triggering new convective cells. A correct understanding of the origin of the water vapor in these patches is, thus, essential to improving existing convective parameterizations. Recent studies have addressed this problem and have shown that contrary to what was previously thought, the main source of water vapor in moist patches are surface latent heat fluxes, instead of rain evaporation. This paper offers a different perspective to the topic, focusing on the origin only of the water vapor that makes moist patches anomalously moist when compared to the environment. Finally, it is found that near the surface, rain evaporation contributes half as much as latent heat fluxes, implying that a parameterization of the thermodynamic forcing should be more sensitive to environmental variables, like relative humidity, than recently suggested.},
doi = {10.1002/2016GL070893},
journal = {Geophysical Research Letters},
number = 18,
volume = 43,
place = {United States},
year = {Wed Aug 31 00:00:00 EDT 2016},
month = {Wed Aug 31 00:00:00 EDT 2016}
}
Web of Science
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journal, February 1988
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journal, January 2013
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- Atmospheric Chemistry and Physics, Vol. 13, Issue 11
Organization of Tropical Convection in Low Vertical Wind Shears: The Role of Water Vapor
journal, March 2001
- Tompkins, Adrian M.
- Journal of the Atmospheric Sciences, Vol. 58, Issue 6
A Lagrangian Study of Precipitation-Driven Downdrafts*
journal, February 2016
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- Journal of the Atmospheric Sciences, Vol. 73, Issue 2
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journal, July 1982
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- Monthly Weather Review, Vol. 110, Issue 7
βA Theory for Strong Long-Lived Squall Linesβ Revisited
journal, February 2004
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Works referencing / citing this record:
Moisture Distributions in Tropical Cold Pools From Equatorial Indian Ocean Observations and Cloud-Resolving Simulations
journal, October 2018
- Chandra, Arunchandra S.; Zuidema, Paquita; Krueger, Steven
- Journal of Geophysical Research: Atmospheres, Vol. 123, Issue 20
On Cold Pool Collisions in Tropical Boundary Layers
journal, January 2019
- Torri, Giuseppe; Kuang, Zhiming
- Geophysical Research Letters, Vol. 46, Issue 1
Tracking the Gust Fronts of Convective Cold Pools
journal, November 2019
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A Survey of Precipitation-Induced Atmospheric Cold Pools over Oceans and Their Interactions with the Larger-Scale Environment
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Tracking the Gust Fronts of Convective Cold Pools
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- arXiv