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Latent heating characteristics of the MJO computed from TRMM Observations

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1002/2014JD022530· OSTI ID:1440554
 [1];  [2];  [2]
  1. Univ. of Washington, Seattle, WA (United States). Department of Atmospheric Sciences; University of Washington
  2. Univ. of Washington, Seattle, WA (United States). Department of Atmospheric Sciences
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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.

Research Organization:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0008452
OSTI ID:
1440554
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: 4 Vol. 120; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

The variable nature of convection in the tropics and subtropics: A legacy of 16 years of the Tropical Rainfall Measuring Mission satellite: CONVECTIVE VARIABILITY SEEN BY TRMM journal September 2015
Contrast in monsoon precipitation over oceanic region of north Bay of Bengal and east equatorial Indian Ocean: PRECIPITATION OVER NORTH BoB AND EAST EIO journal February 2018
Studies of General Precipitation Features with TRMM PR Data: An Extensive Overview journal January 2019
Evaluation of IMERG and TRMM 3B43 Monthly Precipitation Products over Mainland China journal June 2016

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