Journal of Geophysical Research: Atmospheres


  1. Regular Articles

    1. Top of page
    2. Regular Articles
    3. Research Articles
    1. Climate and Dynamics

      You have free access to this content
      The occurrence of cirrus clouds associated with eastward propagating equatorial n = 0 inertio-gravity and Kelvin waves in November 2011 during the CINDY2011/DYNAMO campaign (pages 12,941–12,947)

      Junko Suzuki, Masatomo Fujiwara, Tomoaki Nishizawa, Ryuichi Shirooka, Kunio Yoneyama, Masaki Katsumata, Ichiro Matsui and Nobuo Sugimoto

      Version of Record online: 9 DEC 2013 | DOI: 10.1002/2013JD019960

      Key Points

      • TTL cirrus clouds were observed over the tropical Indian Ocean
      • Short-period equatorial waves affected the TTL cirrus clouds
      • Wave overlapping is important for the dehydration
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      The cloud population and onset of the Madden-Julian Oscillation over the Indian Ocean during DYNAMO-AMIE (pages 11,979–11,995)

      Scott W. Powell and Robert A. Houze Jr.

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/2013JD020421

      Key Points

      • MJO onset characterized by sharp increase in stratiform precipitation
      • Humidity and convective depth also increase over 3–7 days at MJO onset
      • Convection contributes to tropospheric moistening prior to MJO onset
    3. Composition and Chemistry

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      Atmospheric aerosol properties over the equatorial Indian Ocean and the impact of the Madden-Julian Oscillation (pages 5736–5749)

      H. Langley DeWitt, Derek J. Coffman, Kristen J. Schulz, W. Alan Brewer, Timothy S. Bates and Patricia K. Quinn

      Version of Record online: 3 JUN 2013 | DOI: 10.1002/jgrd.50419

      Key Points

      • Four stages in the aerosol response to MJO-related convection were observed
      • Continental aerosol transported to the Indian Ocean increased in the boreal fall
      • Feedback between MJO-related convection and aerosol observed
    4. You have free access to this content
      Abrupt cooling associated with the oceanic Rossby wave and lateral advection during CINDY2011 (pages 5523–5535)

      Ayako Seiki, Masaki Katsumata, Takanori Horii, Takuya Hasegawa, Kelvin J. Richards, Kunio Yoneyama and Ryuichi Shirooka

      Version of Record online: 18 OCT 2013 | DOI: 10.1002/jgrc.20381

      Key Points

      • Abrupt cooling occurred in the central south Indian Ocean during CINDY2011.
      • Lateral advection plays an important role in the cooling.
    5. You have free access to this content
      Effects of the diurnal cycle in solar radiation on the tropical Indian Ocean mixed layer variability during wintertime Madden-Julian Oscillations (pages 4945–4964)

      Yuanlong Li, Weiqing Han, Toshiaki Shinoda, Chunzai Wang, Ren-Chieh Lien, James N. Moum and Jih-Wang Wang

      Version of Record online: 3 OCT 2013 | DOI: 10.1002/jgrc.20395

      Key Points

      • The diurnal cycle enhances intraseasonal SST variability by 20%.
      • Impact of diurnal cycle on the Indian ocean is mainly through nonlinear effect.
      • The diurnal cycle leads to significant change in surface heat flux.
  2. Research Articles

    1. Top of page
    2. Regular Articles
    3. Research Articles
    1. Aerosol and Clouds

      Cloud organization and growth during the transition from suppressed to active MJO conditions (pages 10,324–10,350)

      Angela K. Rowe and Robert A. Houze Jr.

      Version of Record online: 9 OCT 2015 | DOI: 10.1002/2014JD022948

      Key Points

      • MJO initiation is preceded by nonprecipitating clouds organizing into lines
      • Only after nonprecipitating clouds organize do rain cells and cold pools form
      • Deep clouds at intersecting cold pools occur late in suppressed periods
    2. Precipitation hydrometeor type relative to the mesoscale airflow in mature oceanic deep convection of the Madden-Julian Oscillation (pages 13,990–14,014)

      Hannah C. Barnes and Robert A. Houze Jr.

      Version of Record online: 20 DEC 2014 | DOI: 10.1002/2014JD022241

      Key Points

      • Hydrometeor types are systematically located relative to mesoscale air motions
      • Heavy rain and riming occur downstream of mesoscale convective updrafts
      • Pockets of rimed ice particles occur near melting level in stratiform region
    3. You have free access to this content
      Microphysical characteristics of MJO convection over the Indian Ocean during DYNAMO (pages 2543–2554)

      Angela K. Rowe and Robert A. Houze Jr.

      Version of Record online: 14 MAR 2014 | DOI: 10.1002/2013JD020799

      Key Points

      • Peak MJO rainfall coincided with peak wet aggregates in stratiform
      • Infrequent graupel concentrated near melting level
      • December MCSs shallower with weaker brightband
    4. Climate and Dynamics

      Effect of dry large-scale vertical motions on initial MJO convective onset (pages 4783–4805)

      Scott W. Powell and Robert A. Houze Jr.

      Version of Record online: 27 MAY 2015 | DOI: 10.1002/2014JD022961

      Key Points

      • A dry wavenumber 1 zonal wind and vertical velocity MJO signal is shown
      • Large-scale reduction in subsidence instrumental in DYNAMO MJO onset
    5. Evolution of precipitation and convective echo top heights observed by TRMM radar over the Indian Ocean during DYNAMO (pages 3906–3919)

      Scott W. Powell and Robert A. Houze Jr.

      Version of Record online: 12 MAY 2015 | DOI: 10.1002/2014JD022934

      Key Points

      • Convection builds from congestus to deep mode in week prior to MJO onset
      • Variability of ~30 days in echo top heights not seen over Maritime Continent
      • Congestus leads deep convection by 4–8 days
    6. Evaluation of convection-permitting model simulations of cloud populations associated with the Madden-Julian Oscillation using data collected during the AMIE/DYNAMO field campaign (pages 12,052–12,068)

      Samson Hagos, Zhe Feng, Casey D. Burleyson, Kyo-Sun Sunny Lim, Charles N. Long, Di Wu and Greg Thompson

      Version of Record online: 12 NOV 2014 | DOI: 10.1002/2014JD022143

      Key Points

      • Microphysics schemes are evaluated using data collected during AMIE/DYNAMO
      • There is a power law relationship between echo-top height and cloud radius
      • Cold pool frequency is sensitive to raindrop breakup and self-collection
    7. You have free access to this content
      Radar observations of MJO and Kelvin wave interactions during DYNAMO/CINDY2011/AMIE (pages 6347–6367)

      Amanda DePasquale, Courtney Schumacher and Anita Rapp

      Version of Record online: 9 JUN 2014 | DOI: 10.1002/2013JD021031

      Key Points

      • Properties of MJO and KWs are composited from radar and sounding observations
      • Active MJO KWs have more rain and cloud, two stratiform peaks, and move slower
      • Upper level moisture and nonprecipitating clouds are enhanced after KW passages
    8. You have free access to this content
      The role of tilted heating in the evolution of the MJO (pages 2966–2989)

      Cara-Lyn Lappen and Courtney Schumacher

      Version of Record online: 21 MAR 2014 | DOI: 10.1002/2013JD020638

      Key Points

      • Analysis of the effects of various heating distributions on the MJO
      • Modifying heating in CAM4 to more accurately simulate the MJO
      • An assessment of role of tilted heating on the development of tropical waves
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      An explosive convective cloud system and its environmental conditions in MJO initiation observed during DYNAMO (pages 2781–2795)

      Falko Judt and Shuyi S. Chen

      Version of Record online: 18 MAR 2014 | DOI: 10.1002/2013JD021048

      Key Points

      • Explosive mesoscale convective system observed during MJO initiation in DYNAMO
      • Vigorous equatorial low-pressure system provided favorable conditions
      • Multiple convective systems reduced shear prior to explosive convective system
    10. You have full text access to this OnlineOpen article
      Variability in surface meteorology and air-sea fluxes due to cumulus convective systems observed during CINDY/DYNAMO (pages 2064–2078)

      Satoru Yokoi, Masaki Katsumata and Kunio Yoneyama

      Version of Record online: 6 MAR 2014 | DOI: 10.1002/2013JD020621

      Key Points

      • Influence of sub-MCS-scale convective systems on air-sea flux
      • Relation of wind anomaly with environmental trade wind
      • Relation between magnitudes of convective influence and convective activity
    11. You have full text access to this OnlineOpen article
      Initiation of an intraseasonal oscillation in an aquaplanet general circulation model (pages 1956–1976)

      Eric D. Maloney and Brandon O. Wolding

      Version of Record online: 9 DEC 2015 | DOI: 10.1002/2015MS000495

      Key Points:

      • MJO initiation is diagnosed in an aquaplanet model with highly regular MJO
      • Rossby gyres help initiate the next cycle of MJO convection
      • Circumnavigating Kelvin waves modulate the amplitude but not regularity of events
    12. You have full text access to this OnlineOpen article
      Simulations of cloud-radiation interaction using large-scale forcing derived from the CINDY/DYNAMO northern sounding array (pages 1472–1498)

      Shuguang Wang, Adam H. Sobel, Ann Fridlind, Zhe Feng, Jennifer M. Comstock, Patrick Minnis and Michele L. Nordeen

      Version of Record online: 26 SEP 2015 | DOI: 10.1002/2015MS000461

      Key Points

      • Cloud-resolving simulations reveal uncertainty in cloud-radiation interaction
      • The 1M microphysical schemes underestimate radiation anomalies; 2M overestimate
      • The 1M schemes underestimate stratiform; 2M schemes overestimate
    13. You have full text access to this OnlineOpen article
      Consequences of systematic model drift in DYNAMO MJO hindcasts with SP-CAM and CAM5 (pages 1051–1074)

      Walter M. Hannah, Eric D. Maloney and Michael S. Pritchard

      Version of Record online: 14 JUL 2015 | DOI: 10.1002/2014MS000423

      Key Points:

      • SP-CAM better reproduces DYNAMO MJO events compared to CAM5
      • Systematic drift in SP-CAM projects onto the RMM and impacts RMM skill scores
      • Systematic drift in SP-CAM enhances synoptic eddies that affect column moisture
    14. Distinguishing ichthyogenic turbulence from geophysical turbulence (pages 3792–3804)

      Kandaga Pujiana, James N. Moum, William D. Smyth and Sally J. Warner

      Version of Record online: 29 MAY 2015 | DOI: 10.1002/2014JC010659

      Key Points:

      • Ichthyogenic turbulence is diagnosed from acoustics and turbulence measurements
      • Small, turbulent eddies with low mixing efficiency characterize ichthyogenic turbulence
      • Contribution to ocean dynamics is negligible
    15. You have full text access to this OnlineOpen article
      Mechanisms of convective cloud organization by cold pools over tropical warm ocean during the AMIE/DYNAMO field campaign (pages 357–381)

      Zhe Feng, Samson Hagos, Angela K. Rowe, Casey D. Burleyson, Matus N. Martini and Simon P. de Szoeke

      Version of Record online: 3 APR 2015 | DOI: 10.1002/2014MS000384

      Key Points:

      • Intersecting cold pools trigger more clouds than isolated ones
      • Intersecting cold pools produce larger clouds and closer spacing among them
      • Larger clouds and closer spacing promote deeper convection
    16. You have full text access to this OnlineOpen article
      Advection, moistening, and shallow-to-deep convection transitions during the initiation and propagation of Madden-Julian Oscillation (pages 938–949)

      Samson Hagos, Zhe Feng, Kiranmayi Landu and Charles N. Long

      Version of Record online: 11 SEP 2014 | DOI: 10.1002/2014MS000335

      Key Points

      • Large-scale vertical advection of moisture precedes convection transitions in MJO
      • The decline of drying by midlevel meridional advection plays a comparable positive role
      • The contribution of convective-scale processes and zonal advection is smaller
    17. You have free access to this content
      The surface mixed layer heat budget from mooring observations in the central Indian Ocean during Madden–Julian Oscillation events (pages 4638–4652)

      Nan-Hsun Chi, Ren-Chieh Lien, Eric A. D'Asaro and Barry B. Ma

      Version of Record online: 31 JUL 2014 | DOI: 10.1002/2014JC010192

      Key Points

      • Oceanic processes are vital for surface ML heat budget to MJOs
      • Barrier layer strength depends on thickness and density gradient
      • The turbulent heat flux is modified by barrier layer and background shear
    18. You have free access to this content
      Seaglider observations of equatorial Indian Ocean Rossby waves associated with the Madden-Julian Oscillation (pages 3714–3731)

      Benjamin G. M. Webber, Adrian J. Matthews, Karen J. Heywood, Jan Kaiser and Sunke Schmidtko

      Version of Record online: 12 JUN 2014 | DOI: 10.1002/2013JC009657

      Key Points

      • Ocean Rossby waves associated with the MJO observed at unprecedented resolution
      • New mechanism for the MJO to drive variations in primary productivity identified
      • Capacity of gliders to observe these waves demonstrated
    19. You have full text access to this OnlineOpen article
      The moist static energy budget in NCAR CAM5 hindcasts during DYNAMO (pages 420–440)

      Walter M. Hannah and Eric D. Maloney

      Version of Record online: 27 MAY 2014 | DOI: 10.1002/2013MS000272

      Key Points

      • Higher entrainment improves MJO DYNAMO Hindcasts for the wrong reason
      • MSE import by vertical advection compensates for overly weak MSE sources
      • Changes in the omega profile largely explain the differences in GMS among models

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