skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Impacts of Insolation and Soil Moisture on the Seasonality of Interactions Between the Madden‐Julian Oscillation and Maritime Continent

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1029/2020JD032382· OSTI ID:1635063
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Pacific Northwest National Laboratory Richland WA USA
  2. NOAA Pacific Marine Environmental Laboratory Seattle WA USA
+ Show Author Affiliations

This study aims to improve understanding the seasonality of how the Madden-Julian Oscillation (MJO) interacts with the Maritime Continent (MC). Besides responding to the monsoonal east-west movement, observations show that the MJO amplitude and precipitation over the MC islands exhibit semi-annual variability, with apparent strengthening of MJO signal during March and September, when solar insolation is strongest over the MC region. Furthermore, during the high insolation months, soil moisture shows wetter conditions during the early phases of the MJO. Motivated by these results a series of regional convection permitting simulations are performed for the November 2014 MJO event as a case study under the following conditions: (i) increased solar insolation to mimic the local summer, (ii) reduced initial soil moisture and (iii) the two conditions combined. Results show that increased insolation increases precipitation including that associated with MJO moisture convergence over the MC region. On the other hand, decreased initial soil moisture slightly increases precipitation over the MC islands and reduces it over the surrounding waters, but such effect is short lived as the increased precipitation gradually restores the soil moisture to wetter conditions. Using a moisture budget analysis that isolates the MJO and non-MJO signals and additional idealized simulations, the MJO response to high insolation and initial dry soil conditions is demonstrated to be related to the response of the basic state moisture distribution over the MC region rather than a direct response of the MJO to the insolation and soil moisture anomalies.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05‐76RLO1830; AC05-76RL01830
OSTI ID:
1635063
Alternate ID(s):
OSTI ID: 1635066; OSTI ID: 1647582
Report Number(s):
PNNL-SA-150515; e2020JD032382
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Vol. 125 Journal Issue: 13; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (23)

Scale Interactions between the MJO and the Western Maritime Continent journal March 2016
Implementation of Noah land surface model advances in the National Centers for Environmental Prediction operational mesoscale Eta model journal November 2003
Large-scale precipitation tracking and the MJO over the Maritime Continent and Indo-Pacific warm pool: LARGE-SCALE PRECIPITATION TRACKING journal August 2016
Radiative transfer for inhomogeneous atmospheres: RRTM, a validated correlated-k model for the longwave journal July 1997
Explicit Forecasts of Winter Precipitation Using an Improved Bulk Microphysics Scheme. Part II: Implementation of a New Snow Parameterization journal December 2008
A Damping Effect of the Maritime Continent for the Madden‐Julian Oscillation journal December 2019
Parameterization improvements and functional and structural advances in Version 4 of the Community Land Model: PARAMETERIZATION IMPROVEMENTS AND FUNCTIONAL AND STRUCTURAL ADVANCES journal January 2011
The impact of the mean moisture bias on the key physics of MJO propagation in the ECMWF reforecast: Moisture Bias and the MJO Prediction journal August 2017
Radiative forcing by long-lived greenhouse gases: Calculations with the AER radiative transfer models journal January 2008
Possible Role of the Diurnal Cycle in Land Convection in the Barrier Effect on the MJO by the Maritime Continent journal March 2019
PERSIANN-CDR: Daily Precipitation Climate Data Record from Multisatellite Observations for Hydrological and Climate Studies journal January 2015
Atmospheric Mechanisms for MJO Decay Over the Maritime Continent: PROPAGATING AND DECAYING MJO EVENTS journal May 2018
The impact of the diurnal cycle on the propagation of M adden‐ J ulian O scillation convection across the M aritime C ontinent journal October 2016
The JRA-25 Reanalysis journal January 2007
A New Moist Turbulence Parameterization in the Community Atmosphere Model journal June 2009
The ERA-Interim reanalysis: configuration and performance of the data assimilation system journal April 2011
An All-Season Real-Time Multivariate MJO Index: Development of an Index for Monitoring and Prediction journal August 2004
Propagation of the Madden-Julian Oscillation through the Maritime Continent and scale interaction with the diurnal cycle of precipitation: MJO Propagation and Scale Interaction with the Diurnal Cycle
  • Peatman, Simon C.; Matthews, Adrian J.; Stevens, David P.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 140, Issue 680 https://doi.org/10.1002/qj.2161
journal May 2013
The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-Global, Multiyear, Combined-Sensor Precipitation Estimates at Fine Scales journal February 2007
Barrier Effect of the Indo-Pacific Maritime Continent on the MJO: Perspectives from Tracking MJO Precipitation journal May 2017
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
An Improved Mellor–Yamada Level-3 Model with Condensation Physics: Its Design and Verification journal July 2004
MERRA: NASA’s Modern-Era Retrospective Analysis for Research and Applications journal July 2011

Similar Records

The impact of the diurnal cycle on the propagation of Madden-Julian Oscillation convection across the Maritime Continent
Journal Article · Mon Sep 19 00:00:00 EDT 2016 · Journal of Advances in Modeling Earth Systems · OSTI ID:1635063
+5 more
The Boreal Summer Madden–Julian Oscillation and Moist Convective Morphology over the Maritime Continent
Journal Article · Thu Feb 06 00:00:00 EST 2020 · Journal of the Atmospheric Sciences · OSTI ID:1635063
+2 more
An oceanic pathway for Madden–Julian Oscillation influence on Maritime Continent Tropical Cyclones
Journal Article · Wed Oct 27 00:00:00 EDT 2021 · npj Climate and Atmospheric Science · OSTI ID:1635063
+1 more

Related Subjects

54 ENVIRONMENTAL SCIENCES