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Title: Latent heating characteristics of the MJO computed from TRMM Observations

Abstract

We report the Tropical Rainfall Measurement Mission's (TRMM) Spectral Latent Heating algorithm shows the contributions of different forms of convection to the latent heating profiles of the Madden-Julian Oscillation over the central Indian and West Pacific Oceans. In both oceanic regions, storms containing broad stratiform regions produce increased upper level heating during active Madden-Julian Oscillation (MJO) phases. The largest differences between the central Indian and West Pacific Ocean heating are associated with heating produced by convective elements. Examination of the most extreme forms of convection shows that mesoscale organized convection often produces at least as much latent heat as young vigorous deep convection. Heating from nonextreme (often midlevel-topped) convection is an important component of the MJO heating in both regions in all stages of the MJO. Over the central Indian Ocean the heating profile changes from having a maximum at 2 km due to nonextreme convection to a profile during the active stage that has two maxima: one at 3 km due to nonextreme convection and 6 km owing to numerous mature mesoscale storms with broad stratiform precipitation components. Lastly, over the West Pacific, the maxima at 3 and 6 km are present in all MJO stages, but the magnitudemore » of the 6 km maximum sharply increases in the active MJO stage due to an increase in the number of storms with broad stratiform precipitation areas.« less

Authors:
 [1];  [1];  [1]
  1. Univ. of Washington, Seattle, WA (United States). Department of Atmospheric Sciences
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1440554
Alternate Identifier(s):
OSTI ID: 1402213
Grant/Contract Number:  
SC0008452
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research: Atmospheres
Additional Journal Information:
Journal Volume: 120; Journal Issue: 4; Journal ID: ISSN 2169-897X
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Barnes, Hannah C., Zuluaga, Manuel D., and Houze, Robert A. Latent heating characteristics of the MJO computed from TRMM Observations. United States: N. p., 2015. Web. doi:10.1002/2014JD022530.
Barnes, Hannah C., Zuluaga, Manuel D., & Houze, Robert A. Latent heating characteristics of the MJO computed from TRMM Observations. United States. doi:10.1002/2014JD022530.
Barnes, Hannah C., Zuluaga, Manuel D., and Houze, Robert A. Wed . "Latent heating characteristics of the MJO computed from TRMM Observations". United States. doi:10.1002/2014JD022530. https://www.osti.gov/servlets/purl/1440554.
@article{osti_1440554,
title = {Latent heating characteristics of the MJO computed from TRMM Observations},
author = {Barnes, Hannah C. and Zuluaga, Manuel D. and Houze, Robert A.},
abstractNote = {We report the Tropical Rainfall Measurement Mission's (TRMM) Spectral Latent Heating algorithm shows the contributions of different forms of convection to the latent heating profiles of the Madden-Julian Oscillation over the central Indian and West Pacific Oceans. In both oceanic regions, storms containing broad stratiform regions produce increased upper level heating during active Madden-Julian Oscillation (MJO) phases. The largest differences between the central Indian and West Pacific Ocean heating are associated with heating produced by convective elements. Examination of the most extreme forms of convection shows that mesoscale organized convection often produces at least as much latent heat as young vigorous deep convection. Heating from nonextreme (often midlevel-topped) convection is an important component of the MJO heating in both regions in all stages of the MJO. Over the central Indian Ocean the heating profile changes from having a maximum at 2 km due to nonextreme convection to a profile during the active stage that has two maxima: one at 3 km due to nonextreme convection and 6 km owing to numerous mature mesoscale storms with broad stratiform precipitation components. Lastly, over the West Pacific, the maxima at 3 and 6 km are present in all MJO stages, but the magnitude of the 6 km maximum sharply increases in the active MJO stage due to an increase in the number of storms with broad stratiform precipitation areas.},
doi = {10.1002/2014JD022530},
journal = {Journal of Geophysical Research: Atmospheres},
number = 4,
volume = 120,
place = {United States},
year = {2015},
month = {1}
}

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